Agilent Technologies Microwave Oven 53150A User Manual
Operating Guide  
This guide describes how to use the Agilent 53150A, 53151A, and 53152A  
Microwave Frequency Counters. The information in this guide applies to  
instruments having the number prefix listed below, unless accompanied  
by a “Manual Updating Changes” package indicating otherwise.  
SERIAL PREFIX NUMBER: 3735A, US3925, and US4050 (53150A)  
3736A, US3926, and US4051 (53151A)  
3737A, US3927, and US4052 (53152A)  
Agilent 53150A/151A/152A  
Microwave Frequency Counter  
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Contents  
Contents and Organization viii  
Related Documents ix  
Types of Service Available if Instrument Fails  
Repackaging for Shipment xi  
x
Description of the Microwave Frequency Counter xii  
Options xiii  
Accessories Supplied and Available xiv  
Agilent 53150A/151A/152A Quick Reference Guide xv  
1
Getting Started  
The Front Panel at a Glance 1-2  
The Front Panel Indicators at a Glance 1-3  
The Front Panel Menus at a Glance 1-4  
The Display Annunciators at a Glance 1-5  
The Display Special Characters at a Glance 1-6  
The Rear Panel at a Glance 1-7  
Operating the Counter 1-8  
Turning the Counter On 1-10  
Turning the Display Backlight Off or On 1-11  
Using the Menu 1-12  
Displaying the Menu 1-12  
Navigating in the Menu and Changing Settings 1-12  
Setting the Serial Port Baud Rate (Menu Example) 1-15  
Selecting the Input Channel 1-16  
Measuring Frequency 1-17  
Measuring Relative Frequency 1-19  
Offsetting a Frequency Measurement 1-20  
Measuring Power (Channel 2 Only) 1-22  
Selecting the Unit of Measurement for Power 1-23  
Measuring Relative Power 1-24  
Offsetting a Power Measurement 1-24  
Operating Guide  
iii  
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Contents  
Using Power Correction 1-26  
Power Correction Theory of Operation 1-26  
Increasing Profile Accuracy 1-27  
Selecting a Power-Correction Profile 1-28  
Entering Data Points in a Power-Correction Profile 1-28  
Setting the Measurement Rate 1-32  
Setting the Number of Averages 1-33  
Setting the Resolution 1-34  
2
Operating Your Frequency Counter  
Introduction 2-2  
Chapter Summary 2-2  
How this Counter Works for You 2-3  
Summary of the Measurement Sequence 2-4  
Using the Selection Keys 2-5  
Sequencing Through the Menu 2-5  
Numeric Entry 2-6  
Changing States 2-7  
Using the Clear and Reset/Local Keys 2-9  
Acknowledging Messages 2-9  
Other Function Selection Keys 2-10  
Measuring Frequency 2-12  
Setting the Resolution and the Measurement Rate 2-14  
Setting the Resolution 2-14  
Resolution Setting Example 2-15  
Setting the Measurement Rate 2-16  
Rate Setting Example 2-16  
Setting the Number of Averages 2-17  
Averages Setting Example 2-17  
Measuring Relative Frequency 2-20  
Relative Frequency Example 2-20  
Offsetting a Frequency Measurement 2-21  
Frequency Offset Example 2-21  
Measuring Power 2-24  
Power Measurement Example 2-24  
iv  
Operating Guide  
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Contents  
Measuring Relative Power 2-26  
Relative Power Example 2-26  
Offsetting a Power Measurement 2-27  
Power Offset Example 2-27  
Using Power Correction 2-30  
Power Correction Theory of Operation 2-31  
Increasing Profile Accuracy 2-32  
Power Correction Examples 2-32  
Power Correction Example: Selecting a Correction Profile 2-33  
Power Correction Example: Editing Data Point Values 2-35  
Using the Menu 2-39  
Navigating in the Menu and Changing Settings 2-41  
Reference Oscillator (REF OSC) 2-42  
Do Self Test 2-43  
Battery Voltage (BATT VOLTAGE) 2-43  
Operating Hours (OP HOURS) 2-43  
Model Number, Firmware Version, Serial Number,  
and Option Codes 2-43  
Preset 2-45  
RS-232 Serial Port Data Rate (BAUD) 2-46  
Frequency Modulation (FM) 2-46  
Channel 1 Low-Pass Filter (CH1 LPF) 2-46  
Recall User Settings (RECALL) 2-46  
Save User Settings (SAVE) 2-46  
Power Correction (PWR CORR) 2-46  
3
Specifications  
Introduction 3-2  
A
Rack Mounting the Counter  
Rack Mounting the Counter A-2  
Operating Guide  
v
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Contents  
B
C
Messages  
Overview B-2  
Status Messages B-2  
Self-Test Messages B-3  
Error Messages B-4  
Using the Battery Option  
Overview C-2  
Operating the Counter from the Batteries C-2  
Operating the Counter from a DC Power Source C-3  
Replacing the Batteries C-4  
Removing the Batteries C-4  
Installing Batteries C-5  
Charging the Batteries C-8  
Precautions C-9  
vi  
Operating Guide  
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In This Guide  
This book is the operating guide for the Agilent 53150A (20 GHz), 53151A  
(26.5 GHz), and 53152A (46 GHz) Frequency Counters. It consists of a  
table of contents, this preface, a quick reference guide, three chapters,  
three appendices, and an index.  
This preface contains the following information:  
•
•
•
•
•
•
•
•
Contents and Organization  
Related Documents  
pg. viii  
pg. ix  
Types of Service Available if Instrument Fails  
Repackaging for Shipment  
Description of the Microwave Frequency Counter  
Options  
pg. x  
pg. xi  
pg. xii  
pg. xiii  
pg. xiv  
pg. xiv  
Accessories Supplied and Available  
Manuals Supplied  
Operating Guide  
vii  
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In This Guide  
Contents and Organization  
The Quick Reference Guide consists of a Menu Tree (tear-out sheet)  
that serves as a tool to trigger your memory or get you quickly  
reacquainted with the instrument.  
Chapter 1 Getting Started is a quick-start guide that gives you a brief  
overview of the Counter’s keys, indicators, menus, display, and  
connectors. A graphical procedure for performing a measurement is  
also provided.  
Chapter 2 Operating Your Instrument is an operator’s reference.  
You are given an overview of each group of front-panel keys, operating  
functions, and menus followed by a series of exercises that guide you  
through the operation of the Counter.  
Chapter 3 Specifications lists the specifications and characteristics of  
the Counter.  
Appendix A Rack Mounting the Counter provides rack-mounting  
procedures for the Counter.  
Appendix B Messages lists and explains all of the messages that are  
displayed on the Counter’s front panel and/or sent over the RS-232  
serial interface.  
Appendix C Using the Battery Option explains how to use the  
Counter with the Battery option.  
Index  
viii  
Operating Guide  
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In This Guide  
Related Documents  
For more information on frequency counters refer to the following Series  
200 Application Notes:  
•
•
•
Fundamentals of Electronic Frequency Counters,  
Application Note 200—Agilent part number 02-5952-7506.  
Understanding Frequency Counter Specifications,  
Application Note 200-4—Agilent part number 02-5952-7522.  
Fundamentals of Time and Frequency Standards,  
Application Note 52-1—Agilent part number 02-5952-7870.  
Operating Guide  
ix  
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In This Guide  
Types of Service Available if Instrument Fails  
If your Counter fails within one year of original purchase, Agilent will  
repair it free of charge. If your instrument fails after your one-year  
warranty expires, Agilent will repair it, or you can repair it yourself.  
There are three types of repair services:  
•
•
Standard repair service—if downtime is not critical.  
Express Repair/Performance Calibration Service—if downtime  
is critical.  
•
Owner repair—repair the unit yourself using the Assembly-Level  
Service Guide.  
Standard Repair Services (Worldwide)  
Contact your nearest Agilent Service Center to arrange to have your  
Counter repaired.  
Express Repair/Performance Calibration  
Service (USA Only)  
If downtime is critical, you can receive your repaired Counter via  
overnight shipment. Just call 1-800-403-0801 and ask for Express  
Repair/Performance Calibration Service. When your Counter is repaired,  
it will be returned via overnight shipment.  
Repair Instrument Yourself  
If you choose to repair the instrument yourself or would like more details  
on self test and calibration, use the procedures in the Assembly-Level  
Service Guide.  
x
Operating Guide  
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In This Guide  
Repackaging for Shipment  
For the Express Repair/Performance Calibration Service described above,  
return your failed Counter to the designated Agilent Service Center,  
using the instrument’s original shipping carton (if available). Agilent  
notifies you when your failed instrument is received.  
If the instrument is to be shipped to Agilent for service or repair, be sure  
you do the following:  
•
Attach a tag to the instrument identifying the owner and indicating  
the required service or repair. Include the instrument model number  
and full serial number.  
•
•
Place the instrument in its original container (if available) with  
appropriate packaging material.  
Secure the container with strong tape or shipping bands.  
If the original shipping container is not available, place your unit in a  
container with at least 4 inches of compressible packaging material  
around all sides of the unit. Use static free packaging materials to avoid  
additional damage to your unit.  
Agilent suggests that you always insure shipments.  
Operating Guide  
xi  
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In This Guide  
Description of the Microwave Frequency  
Counter  
The Agilent 53150A, 53151A, and 53152A Microwave Frequency Counters  
are capable of measuring frequencies from 10 Hz to 125 MHz on Channel 1  
and from 50 MHz to 20 GHz (53150A), 26.5 GHz (53151A), and 46 GHz  
(53152A) on Channel 2. These frequency counters are also capable of  
measuring power on Channel 2 (in the same frequency ranges). All three  
Counters have a maximum frequency resolution of 1 Hz.  
The Agilent 53150A/151A/152A provides GPIB and RS-232 serial  
interfaces and are suitable for bench-top and ATE operation.  
The basic measurement functions of the Agilent 53150A/151A/152A  
include Frequency, Relative Frequency, Frequency Offset, and Power  
(including Power Offset and Relative Power). All of these features are  
accessible from the front panel and over the GPIB and RS-232 interfaces.  
The Agilent 53150A/151A/152A includes the following additional  
measurement functions and features that are designed specifically for  
manufacturing and service applications:  
•
•
1, 2, 5, and 10 MHz external reference capability  
Optional high-stability oven oscillator for high-accuracy needs and  
lengthened calibration cycles  
•
•
•
Frequency and power offset capabilities for relative measurements  
SCPI programming capability  
Battery and dc input option for operation in locations where AC  
power is unavailable  
•
Optional soft carrying case for safe transportation and mobile use  
Programmable control is performed via an GPIB or an RS-232 serial  
interface. The GPIB and RS-232C ports are standard for the Agilent  
53150A, 53151A, and 53152A.  
xii  
Operating Guide  
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In This Guide  
Options  
The options available for the Agilent 53150A/151A/152A are listed below.  
Specifications for the options are listed in Chapter 3, “Specifications.”  
Options ordered with the Counter are installed at the factory and are  
ready for operation on delivery. Refer to the "Retrofitting Options" chapter  
in the Agilent 53150A/151A/152A Assembly-Level Service Guide for  
information on installing options in the field.  
Hardware  
•
•
•
•
High Stability Oven Timebase, Option 001  
Battery/DC Power Input, Option 002  
Rack Mount Kit, Option 1CM  
Soft Carrying Case, Option 007  
Support  
•
•
•
3-year Return to Agilent for Repair, Option W30  
3-year Return to Agilent for Calibration, Option W32  
3-year Return to Agilent for Standards Compliant Calibration,  
Option W34  
•
•
•
5-year Return to Agilent for Repair, Option W50  
5-year Return to Agilent for Calibration, Option W52  
5-year Return to Agilent for Standards Compliant Calibration,  
Option W54  
Retrofit  
•
Options 001 and 002 can be installed only by authorized Agilent  
Technologies Repair Centers.  
Operating Guide  
xiii  
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In This Guide  
Accessories Supplied and Available  
Accessories Supplied  
•
•
Power cord, 2.3 meters (Part number dependent upon destination country)  
Fuse (Agilent P/N 2110-0007)  
Accessories Available  
•
•
•
•
•
Soft Carrying Case, (Agilent P/N 53150-80016)  
Automotive Power Adapter (Agilent P/N 53150-60214)  
Battery (Agilent P/N 53150-80010)  
GPIB Cables (Agilent P/N 10833A/B/C/D)  
RS-232 Cable (Agilent P/N 53150-60215)  
Manuals Supplied  
Agilent 53150A/151A/152A Operating Guide  
(Agilent P/N 53150-90013)  
Agilent 53150A/151A/152A Programming Guide  
(Agilent P/N 53150-90014)  
Agilent 53150A/151A/152A Assembly-Level Service Guide  
(Agilent P/N 53150-90015)  
xiv  
Operating Guide  
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Agilent 53150A/151A/152A  
Quick Reference Guide  
The Quick Reference Guide is designed for experienced  
users of the Agilent 53150A, 53151A, and 53152A. It is  
intended to be used as a tool to trigger your memory.  
If you are using the Counter for the first time, Agilent  
recommends that you at least read Chapter 1, “Getting  
Started,” first.  
The Quick Reference Guide, which follows this page,  
consists of a menu tree that may be torn out of the guide  
for external use.  
xv  
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xvi  
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Agilent 53150A/151A/152A  
Frequency Counter  
nff  
e
/
Menu  
Reset/  
Local  
REF OSC > INT  
REF OSC > EXT  
PRESET  
< 00-111-222 >  
< SN 999999 >  
53150A  
>
<OPTNS -- -- -- -- >  
SAVE  
> 0 to 9  
OP 9999 HRS  
RECALL > 0 to 9  
BATT VOLTAGE  
0.0  
CH1 LPF > OFF  
CH1 LPF > ON  
Freq  
Pwr  
Offset  
Offset  
Avg  
GPIB  
Resol  
Rate  
DO SELF TEST  
PWR CORR > OFF  
FM  
FM  
> AUTO  
>
OFF  
00 000 000 000 000  
49 999 999 999 999  
00.00  
99.99  
GPIB ADDR  
>
0
PWR CORR >  
PWR CORR >  
0
to  
9
BAUD  
BAUD  
BAUD  
BAUD  
BAUD  
BAUD  
>
>
>
>
>
>
9600  
4800  
GPIB ADDR > 30  
2400  
1200  
Freq  
Pwr  
Offset  
Offset  
GPIB  
Resol  
19200  
14400  
Rate  
Avg  
RESOL  
1 HZ  
RATE  
RATE  
RATE  
RATE  
FAST  
MED  
AVERAGES 01  
AVERAGES 99  
RESOL 10 KHZ  
RESOL 100 KHZ  
SLOW  
HOLD  
RESOL  
1 MHZ  
QR-1  
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QR-2  
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1
Getting Started  
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Chapter 1 Getting Started  
The Front Panel at a Glance  
The Front Panel at a Glance  
1
2
3
4
20 GHz Counter  
Hz  
53150A  
CHANNEL 1  
10 Hz to 125 MHz  
GHz  
MHz  
kHz  
POWER  
Ch 12  
Rel Freq  
1M Ω  
Offset  
Ext Rel  
Hold  
dB  
Avg On  
dBm  
Watts  
mW  
uW  
Rate Rmt SRQ  
Rel Pwr  
Error  
Shift  
DAMAGE  
+30 dBm  
Offset  
%
Standby  
Menu  
FREQ  
Gate  
POWER  
Channel 2  
dBm/ W  
CHANNEL 2  
50 MHz to 20 GHz  
DAMAGE  
+27 dBm  
MODIFY  
Freq  
Offset  
Pwr  
Offset  
GPIB  
Reset/  
Local  
Rate  
Avg  
Resol  
Chan  
Select  
Display  
Power  
50 Ω  
On/Off  
Clear  
Rel Freq  
Rel Pwr  
Shift  
+/-  
Enter  
Offset  
On/Off  
Offset  
On/Off  
20 19 18 17 16 15 14 13  
12 11 10 9 8  
7
6
5
1 Standby indicator  
11 Selection keys active indicator  
12 Selection (arrow) keys  
13 Resolution / GPIB key  
14 Enter key  
2 Power/Standby switch  
3 LCD display  
4 Channel 1 input connector  
5 Channel 2 input connector  
15 Average / Power Offset key  
16 Sign (+/–) key  
6 Display Power / dBm/W key (Channel 2)  
7 Offset On/Off / Relative Power key  
17 Rate / Frequency Offset key  
18 Clear / Backlight On/Off key  
19 Reset/Local / Menu key  
20 Shift key  
(Channel 2)  
8 Channel Selection key  
9 Offset On/Off / Relative Frequency key  
10 Gate indicator  
1-2  
Operating Guide  
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Chapter 1 Getting Started  
The Front Panel Indicators at a Glance  
The Front Panel Indicators at a Glance  
The front panel includes three LED indicators. These are listed and  
described in the following table.  
Indicator  
POWER  
Description  
The Standby indicator is lit whenever the Main ~  
Power switch on the rear panel is turned ON, and  
the POWER switch on the front panel is OFF (out).  
During Standby, most of the instrument’s circuits do  
not receive power. However, the timebase and the  
cooling fan are powered so that the temperature in  
the timebase components remains stable, and if the  
Battery option is installed, the battery-charging  
circuits are powered. When you press the POWER  
switch on the front panel, the Standby indicator goes  
off, and all of the Counter’s circuits receive power.  
Standby  
When the LED indicator between the arrow keys  
flashes, the arrow keys can be used to navigate and  
change values in menus.  
When you make a change in a menu, always press  
the Enter key to save the setting and exit the menu.  
The Gate LED indicator flashes to indicate the rate  
at which measurements are triggered. The flash rate  
of the LED varies with the settings of the  
measurement rate (Rate key) and the measurement  
resolution (Resol key). The flash rate of the LED  
provides a rough indication of the number of  
measurements that are being taken in a given period  
of time.  
FREQ  
Gate  
Chan  
Select  
NOTE  
It is normal for the fan in the Counter to run when the Counter is in  
Standby mode. Power is supplied to the timebase whenever the  
Main ~ Power switch is on to maintain long term measurement reliability,  
and the fan helps maintain timebase temperature stability.  
Operating Guide  
1-3  
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Chapter 1 Getting Started  
The Front Panel Menus at a Glance  
The Front Panel Menus at a Glance  
Shift  
Menu  
Reset/  
Local  
REF OSC > INT  
PRESET  
53150A  
REF OSC > EXT  
SAVE 0 to 9  
RECALL > 0 to 9  
<
00-111-222  
>
<
SN 999999  
>
>
<OPTNS -- -- -- --  
>
>
OP 9999 HRS  
BATT VOLTAGE  
0.0  
CH1 LPF  
CH1 LPF  
>
>
OFF  
ON  
DO SELF TEST  
PWR CORR > OFF  
FM  
FM  
>
AUTO  
OFF  
>
PWR CORR >  
PWR CORR >  
0
to  
9
BAUD  
BAUD  
BAUD  
BAUD  
BAUD  
BAUD  
>
9600  
4800  
>
>
>
>
>
2400  
1200  
19200  
14400  
Shift  
GPIB  
Rate  
Avg  
Resol  
Resol  
RESOL  
1 HZ  
RATE  
FAST  
MED  
AVERAGES 01  
AVERAGES 99  
GPIB ADDR  
GPIB ADDR  
0
RESOL 10 KHZ  
RESOL 100 KHZ  
30  
RATE  
RATE  
RATE  
SLOW  
HOLD  
RESOL  
1 MHZ  
1-4  
Operating Guide  
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Chapter 1 Getting Started  
The Display Annunciators at a Glance  
The Display Annunciators at a Glance  
GHz  
MHz  
kHz  
Hz  
Ch 12  
Rel Freq  
Offset  
Ext Rel Hold  
Rate Rmt SRQ  
dB  
Avg On  
dBm  
Watts  
mW  
uW  
Rel Pwr  
Offset  
Error  
Shift  
%
Annunciator Description  
Ch 1 or Ch 2 Indicates which channel is selected to measure an input signal.  
Freq  
Indicates that the value displayed is a frequency reading.  
Rel Freq  
The displayed frequency value is relative to a previously zeroed value.  
Freq  
The displayed frequency value is offset by a previously entered frequency value.  
Offset  
Avg On  
The displayed frequency value is the result of a number of individual frequency  
measurements that have been averaged.  
Pwr  
The Counter is set to measure Power (Channel 2 only).  
Rel Pwr  
The displayed power measurement is relative to a previously zeroed power value.  
The displayed power value is offset by a previously entered power value.  
Pwr  
Offset  
dB, dBm, W, Indicates the unit of measurement for the currently displayed power value.  
mW, µW, %  
Provides a real-time analog representation of the Power measurement (intended for  
peaking and similar procedures).  
Ext Ref  
Hold  
The Counter is using an external reference signal for frequency measurements.  
Indicates the Counter is in Hold (single-measurement) mode.  
Rmt, SRQ  
Shows the current state of the GPIB interface  
(Rmt = Remote operation via GPIB; SRQ = Service ReQuest).  
Error  
Shift  
Indicates that a front-panel key command is unacceptable in the current context.  
Indicates that all front-panel keys are redefined to the function printed above the key.  
Shows the amount of charge in the batteries (if the Battery option is installed).  
Operating Guide  
1-5  
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Chapter 1 Getting Started  
The Display Special Characters at a Glance  
The Display Special Characters at a Glance  
Special  
Description  
Characters  
Points to the current value for a Menu setting.  
Indicates that the value for the current Menu setting can be  
changed using the selection (arrow) keys.  
When the letter “c” is displayed in the hundredths position of  
the power display, Power Correction mode is in effect.  
NOTE  
The first two special characters shown above are intended to help you  
navigate within the Menu. When the right pointer ( ) is flashing, it  
indicates the current setting for the selected Menu option. When the left  
pointer ( ) is flashing, it indicates that you can use the selection (arrow)  
keys to change the setting for the current Menu option.  
1-6  
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Chapter 1 Getting Started  
The Rear Panel at a Glance  
The Rear Panel at a Glance  
1
2
3
4
5
6
Made in U.S.A.  
with domestic and foreign content  
ISM 1-A  
OPTIONS  
001 Oven Time Base  
002 Battery  
Main ~ Power  
Reference 10 MHz  
Auxillary  
WARNING:  
In  
To avold electric shock,  
do not remove covers.  
No user-serviceable parts inside.  
or  
Out  
Refer all servicing to qualified personnel.  
This unit must be earth grounded.  
11 TO 18 VDC  
EXT DC  
AC POWER  
100 – 130 VAC, 50/60/400 Hz 75 VA  
220 – 240 VAC, 50/60 Hz 75 VA  
FUSE  
1.0 A T  
250 V  
RS-232  
10  
9
7
8
1 AC Input/Power module (Senses  
incoming voltage and adjusts  
automatically)  
5 Battery compartment (optional) or cover plate  
6 GPIB (IEEE-488.1) Interface connector  
7 RS-232 Interface connector (RJ12)  
8 Main AC Power On indicator  
2 External Reference connector (BNC)  
1, 2, 5, or 10 MHz Input  
10 MHz Output  
9 EXT DC power-input connector (functional only  
when Battery option is installed)  
3 Fuse Holder (behind door)  
10 Main ~ Power switch  
4 Auxiliary connector (reserved)*  
* The Auxiliary connector is not installed on standard production units.  
Operating Guide  
1-7  
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Chapter 1 Getting Started  
Operating the Counter  
Operating the Counter  
The procedures in this section are designed to familiarize you with the  
Frequency Counter’s features and controls. Agilent suggests that you  
follow the steps for each of these procedures, even if you do not presently  
need to make any measurements or to adjust any of the Counter’s settings.  
The following procedures are provided:  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Turning the Counter On  
Turning the Display Backlight Off or On  
Selecting an Input Channel  
Using the Menu  
Setting the Serial Port Baud Rate  
Measuring Frequency  
Measuring Relative Frequency  
Offsetting a Frequency Measurement  
Measuring Power  
Measuring Relative Power  
Offsetting a Power Measurement  
Using Power Correction  
Setting the Measurement Rate  
Setting the Number of Averages  
Setting the Resolution  
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Chapter 1 Getting Started  
Operating the Counter  
The following legend defines the meanings of the icons used throughout  
this chapter.  
Legend  
5
6
1
2
3
4
7
8
9
1
2
Press key one  
time and release  
3
Result  
7
8
9
Indicator off  
4
5
6
Auto operation  
Connect signal  
Disconnect signal  
Indicator on  
Multiple key  
presses  
Indicator flashing  
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Chapter 1 Getting Started  
Operating the Counter  
Turning the Counter On  
To turn on the Counter, turn on the Main ~ Power switch on the rear panel  
(see page 1-7), and then press and release the POWER button on the  
front panel.  
POWER  
Ch 12  
Rel Freq  
Offset  
Ext Rel Hold  
Rate Rmt SRQ  
dB  
Avg On  
Rel Pwr  
Offset  
dBm  
Watts  
mW  
uW  
Error  
Shift  
Standby  
%
Ch  
2
Freq  
1-10  
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Chapter 1 Getting Started  
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NOTE  
NOTE  
If a signal was applied to the Channel 2 input connector prior to turning  
on the Counter, CH2 NO SIGNAL is displayed momentarily. As soon as the  
Counter acquires the input signal, it displays the signal’s value.  
The internal Reference Oscillator requires 10 to 15 minutes to reach a  
stable operating temperature. Since the Reference Oscillator receives  
power only when the Counter is on or in Standby mode, no measurements  
should be taken unless the Counter’s Main ~ Power switch has been in the  
on (1) position for at least that amount of time.  
Turning the Display Backlight Off or On  
When you first turn the Counter on, the backlight for the LCD display is  
always lit. You can toggle the backlight off and on by pressing the Shift  
key and then the  
On/Off (Clear) key, as shown below.  
Ch  
2
Freq  
Shift  
Shift  
On/Off  
Clear  
Ch  
2
Freq  
Ch  
2
Freq  
Shift  
Shift  
On/Off  
Clear  
Ch  
2
Freq  
NOTE  
If your Counter has the Battery option, you can extend the length of time the  
Counter can operate from the batteries by turning off the display backlight.  
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Chapter 1 Getting Started  
Operating the Counter  
Using the Menu  
The Agilent 53150A/151A/152A Counter has one menu that you use to  
control a number of the Counter’s features and functions.  
Displaying the Menu  
To display the Menu, press the Shift key and then the Menu (Reset/Local)  
key, as shown below.  
Ch  
2
Freq  
Shift  
Shift  
Menu  
Reset/  
Local  
Navigating in the Menu and Changing Settings  
Use the Selection (arrow) keys to navigate to the setting you want to  
change and then to actually make the changes. For example, the diagram  
on the next page shows how to change the setting of the Reference  
Oscillator from INTernal to EXTernal. (In this example, a reference signal  
is applied to the External Reference connector, but no signal is applied to  
the Channel 2 input.)  
NOTE  
The Counter will not switch to EXTernal unless a suitable reference  
signal is available at the External Reference connector.  
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Chapter 1 Getting Started  
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Ch  
2
Freq  
Shift  
Shift  
Menu  
Reset/  
Local  
Ch  
2
Enter  
Ext Ref  
When you select the Menu, the indicator between the arrow keys flashes  
to indicate that the arrow keys are now active. Since the Reference  
Oscillator setting is the first one displayed when you invoke the Menu  
(unless you’ve used the Menu to change another setting since you turned  
the Counter on), you don’t have to use the  
(down-arrow) key to get to it.  
(up-arrow) key or the  
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Chapter 1 Getting Started  
Operating the Counter  
When you press the (right-arrow) key, the flashing annunciator ( )  
changes direction, and the current setting for the Reference Oscillator  
(INT [internal] or EXT [external]) flashes. This indicates that you can now  
change this setting. Use either the up-arrow key or the down-arrow key to  
change the setting.  
If there are more than two settings available for the currently selected  
function, you can cycle through the available settings by repeatedly  
pressing either the up-arrow key or the down-arrow key. For example, to  
change the setting for the Baud rate for the serial port, use the sequence  
on the next page.  
Press either the Enter key or the left arrow key to accept the currently  
displayed setting. The Enter key accepts the setting and exits the Menu;  
the left arrow key accepts the setting but does not exit the Menu. Use the  
left arrow key to accept a setting if you want to change additional menu  
settings. The Clear key reverses an unaccepted setting change.  
You navigate to and adjust the remaining settings available in the Menu  
in the manner described above. The Menu also contains some items that  
provide information only (no settings are required [or possible] for these),  
such as Battery Voltage, Operation Hours, and information that identifies  
the Counter (Agilent model number, firmware version number, serial  
number, and installed option codes). These menu options and the ones  
described below are shown in “The Front Panel Menus at a Glance” on  
page 1-4.  
There is also a menu item called Preset and one called Do Self Test. If you  
press the Enter key while PRESET is displayed, all of the Counter’s  
settings are returned to the factory-default settings. If you press Enter  
while DO SELF TEST is displayed, the Counter repeats the tests that are  
normally performed when the Counter is first turned on.  
NOTE  
Remember to terminate each value you change in any of the menu options  
by pressing the Enter key or the left arrow key. You can abort a change to  
any menu option while the Menu is displayed by pressing the Reset/Local  
key or the Clear key. Both keys nullify any changes you made to the  
current menu option, but they do not affect any changes to other menu  
options. The Clear key terminates the current menu session, but the  
Reset/Local key does not.  
1-14  
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Operating the Counter  
Setting the Serial Port Baud Rate (Menu Example)  
Ch  
2
Freq  
Shift  
Shift  
Menu  
Reset/  
Local  
Ch  
2
Freq  
Enter  
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Chapter 1 Getting Started  
Operating the Counter  
Selecting the Input Channel  
You can toggle between Channels 1 and 2 by pressing the Chan Select key.  
Ch  
1
Freq  
Chan  
Select  
Ch  
2
Freq  
Chan  
Select  
1-16  
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Measuring Frequency  
The following diagram shows the basic sequence to use to make a  
frequency measurement using Channel 1. This example assumes that the  
Counter is on and has completed the Self Test. For the purposes of this  
example, use the 10 MHz reference output on the Counter’s rear panel as  
a signal source for input to Channel 1.  
Ch  
2
Freq  
CHANNEL 1  
10 Hz to 125 MHz  
Ch  
2
Freq  
1M Ω  
DAMAGE  
+30 dBm  
Ch  
1
Freq  
Chan  
Select  
Ch  
1
Freq  
The same procedure applies to making a basic frequency measurement on  
Channel 2. However, since Channel 2 is automatically selected when you  
turn on the Counter, the channel-selection step is unnecessary (unless you  
previously selected Channel 1).  
CAUTION  
The Channel 2 input path circuits contain sensitive GaAs semiconductors.  
To prevent damage to these components, always adhere to standard ESD  
(Electro-Static Discharge) prevention procedures, and ensure that the  
maximum power specification for this channel (+27 dBm) is not exceeded.  
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NOTES  
The Counter displays CH2 NO SIGNAL or CH1 NO SIGNAL and shuts  
down all unnecessary circuits when a signal of insufficient amplitude  
(or no signal) is applied to the corresponding input. This extends the  
reliability of the affected components, and if the Battery option is  
installed, extends the length of time the Counter can operate from  
the batteries.  
When the frequency of a signal applied to the Channel 2 input exceeds the  
maximum rated frequency for the instrument, the Counter displays CH2  
TOO HIGH.  
CAUTION  
The 2.9 mm Planar Crown* connector used for the Channel 2 input on the  
Agilent 53152A must be handled with care to prevent damage and/or  
contamination, especially since it acts as a wave guide as well as an  
electrical connection. Observe the following precautions when handling  
this connector:  
1. If you remove the outer portion of the connector, do not touch the  
exposed surfaces of either part of the connector with your bare skin or  
any material that is not intended for cleaning this type of connector.  
2. Avoid dropping or striking either portion of the connector.  
If the connector becomes contaminated, it can be cleaned with isopropyl  
alcohol and a lint-free cloth or other suitable cleaning implement.  
®
* Planar Crown is a registered trademark of Weinschel Corp.  
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Operating the Counter  
Measuring Relative Frequency  
You can measure the difference in frequency from one measurement to  
another (drift) using the Relative Frequency function. You do this by  
pressing the Shift and Rel Freq (Offset On/Off) keys as shown in the  
diagram below (this example assumes that a signal is currently applied  
to Channel 1).  
The Counter stores the current frequency reading when you press the  
Rel Freq key. It then subtracts this value from all subsequent readings  
and displays the difference until you press the Rel Freq key again.  
Ch  
1
Freq  
Ch  
1
Freq  
Shift  
Shift  
Rel Freq  
Ch  
1
Rel Freq  
Offset  
On/Off  
NOTE  
If the input signal fluctuates, the value displayed varies as the Counter  
continues to take measurements. You can vary the speed at which  
measurements are taken by varying the settings for Rate and Resolution  
(see “Setting the Measurement Rate” and “Setting the Resolution” on  
pages 1-32 and 1-34).  
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Operating the Counter  
Offsetting a Frequency Measurement  
You can use the Frequency Offset (Freq Offset) function to add or subtract  
a constant value to/from a frequency measurement. For example, you can  
use an offset to compensate for a systematic error or to display the  
difference in frequency between two signals.  
NOTE  
The Frequency Offset and Relative Frequency functions can be used  
simultaneously.  
To display an offset frequency measurement, you need to set the value and  
sign (+/–) of the offset and to turn the Frequency Offset function on. In the  
diagram on the next page, the Frequency Offset function is enabled first,  
and the offset value is then entered. However, the order doesn’t matter,  
so you can also enter the offset value first, and then turn the offset  
function on.  
NOTE  
When you are entering a value for Frequency Offset (or Power Offset),  
you can use the Reset key to restore all of the displayed digits to zero.  
These are the only two functions in which the Reset key has this effect.  
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Ch  
2
Freq  
Ch  
2
Freq  
Offset  
On/Off  
Offset  
Ch  
2
Freq  
Shift  
Offset  
Shift  
Freq  
Offset  
Freq  
Offset  
Rate  
Freq  
Offset  
Freq  
Offset  
+/-  
Ch  
2
Freq  
Enter  
Offset  
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Chapter 1 Getting Started  
Operating the Counter  
Measuring Power (Channel 2 Only)  
The Agilent 53150A/151A/152A Counter can measure signal power (in the  
same frequency ranges as for frequency measurements) on Channel 2.  
The example procedure for measuring power in the following diagram  
assumes that the Counter has previously been set up to measure a 25 GHz  
input on Channel 2.  
NOTE  
When the power of a signal applied to the Channel 2 input exceeds the  
maximum rated power for the instrument, the Counter displays HI.  
CAUTION  
The Channel 2 input path circuits contain sensitive GaAs semiconductors.  
To prevent damage to these components, always adhere to standard ESD  
(Electro-Static Discharge) prevention procedures, and ensure that the  
maximum power specification for this channel (+27 dBm) is not exceeded.  
Ch  
2
Freq  
Ch  
2
Freq  
Display  
Power  
dBm  
Pwr  
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Chapter 1 Getting Started  
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Selecting the Unit of Measurement for Power  
The Counter’s power-measurement function can display values in either  
of two sets of units of measurement—dB and dBm or W, mW, and µW  
(the Counter automatically selects the most appropriate unit when either  
set of units is selected). Use the procedure in the following diagram to  
select the unit of measurement for power (this procedure assumes that a  
signal is currently applied on Channel 2 and that power is being displayed):  
Ch  
2
Freq  
dBm  
Pwr  
Ch  
2
Freq  
Shift  
dBm  
Pwr  
Shift  
dBm/W  
Display  
Power  
mW  
Pwr  
NOTE  
The Counter is specified for signals having amplitudes of up to +7.00 dBm.  
If a signal having an amplitude greater than +9 or +10 dBm is applied,  
and power measurement is enabled, the annunciators for the power  
reading display “HI” to indicate that the signal’s amplitude exceeds the  
specification. If a signal having an amplitude of less than –40.00 dBm is  
applied, the power annunciators display “LO” to indicate that the signal  
level is too low to be measured by this instrument.  
CAUTION  
The Channel 2 input path circuits contain sensitive GaAs semiconductors.  
To prevent damage to these components, always adhere to standard ESD  
(Electro-Static Discharge) prevention procedures, and ensure that the  
maximum power specification for this channel (+27.00 dBm) is not exceeded.  
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Operating the Counter  
Measuring Relative Power  
You can measure the difference in power from one measurement to  
another (drift) using the Relative Power function. You do this by pressing  
the Shift and Rel Pwr (Offset On/Off) keys, as shown in the diagram below  
(this example assumes that a signal is currently applied to Channel 2).  
The Counter stores the current power reading when you press the  
Rel Pwr key. It then subtracts this value from all subsequent readings  
and displays the difference until you press the Rel Pwr key again.  
Ch  
2
Freq  
dBm  
dBm  
dB  
Pwr  
Ch  
2
Freq  
Shift  
Pwr  
Shift  
Rel Pwr  
Ch  
2
Freq  
Offset  
On/Off  
Rel Pwr  
Offsetting a Power Measurement  
You can use the Power Offset (Pwr Offset) function to add or subtract a  
constant value to/from a power measurement. For example, you can use  
an offset to compensate for a systematic error or to display the difference  
in power between two signals.  
NOTE  
The Power Offset and Relative Power functions can be used simultaneously.  
To display an offset power measurement, you need to set the value and  
sign (+/–) of the offset and to turn the Power Offset function on. In the  
following diagram, the Power Offset function is enabled first, and the  
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Chapter 1 Getting Started  
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offset value is then entered. However, the order doesn’t matter, so you can  
also enter the offset value first, and then turn the offset function on.  
Ch  
2
Freq  
dBm  
Pwr  
Rel Pwr  
Ch  
2
Freq  
Offset  
On/Off  
dB  
Pwr  
Offset  
Ch  
2
Freq  
Shift  
dB  
Pwr  
Offset  
Shift  
Pwr  
Offset  
Avg  
dB  
Pwr  
Offset  
dB  
Pwr  
Offset  
+/-  
dB  
Pwr  
Offset  
Ch  
2
Freq  
Enter  
dB  
Pwr  
Offset  
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Chapter 1 Getting Started  
Operating the Counter  
Using Power Correction  
The Power Correction function in the main Menu allows you to set the  
Counter to automatically compensate for power loss (or gain) that occurs in  
the test configuration, such as attenuation resulting from cable impedance.  
You can choose from nine power-correction profiles that are stored in  
nonvolatile memory, and you can modify the contents of these profiles.  
Each profile is defined by two to ten data points (a data point consists of  
a loss value and a frequency value). When Power Correction is enabled,  
the Counter automatically adds a correction to the power reading  
(determined from the data points in the profile) that compensates for the  
loss (or gain) at the frequency being measured. When a measured  
frequency does not match any of the frequency values defined in the  
currently selected profile, the Counter interpolates for the measured  
frequency to determine the appropriate value to add to the power  
measurement. The correction profiles require a minimum of two data  
points per profile.  
Power Correction Theory of Operation  
When the Counter interpolates between data points to determine the  
amount of correction to apply to the current measurement, it computes  
the correction based on a straight line plotted between the frequency  
values in the two closest data points. Therefore, a graph of a power-  
correction profile would show a “curve” that consists of two to nine  
straight-line segments, rather than a true curve, as shown below.  
P
o
w
e
r
F r e q u e n c y  
1-26  
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Operating the Counter  
NOTE  
As the graph shows, the Counter never computes power-correction values  
for loss above the zero axis. Conversely, corrections are never computed  
for gain below the zero axis. Once the correction value reaches the zero  
axis, no further corrections are applied.  
When the Counter interpolates for frequencies that are above or below the  
range of frequencies specified in the currently selected profile, it never  
computes a value that would fall on the opposite side of the zero axis from  
the closest specified frequency. In other words, if there are two or more  
data points that contain loss values, the Counter never computes or  
applies a correction that would be indicative of gain. Conversely, if there  
are two or more data points that contain gain values (negative loss values),  
the Counter never applies a correction that would be indicative of loss.  
Since there can be no further change in the loss or gain values once the  
zero axis is reached, no power corrections are applied when the input  
frequency reaches or passes a point in the profile that intersects the zero  
axis. Effectively, the Counter computes only loss-correction values or  
gain-correction values—never both within the same profile.  
When you enter values in power-correction data points and then exit the  
data-point display (using either the left-arrow key or the Enter key), the  
Counter immediately sorts all of the data-points into order by the  
frequency values. Therefore, if you enter a pair of values in a data point,  
exit the data-point display, and then immediately return to the display for  
that data point, you may see different values than the ones you just  
entered. The values you entered may now be contained in a differently  
numbered data point in the same profile, if they were previously entered  
out of order by frequency.  
Increasing Profile Accuracy  
To increase the accuracy of a power-correction profile, you can add data  
points between the existing data points in the profile (if less than 10 data  
points are in use), thus bringing the data points closer together and  
shortening the straight-line segments. If all ten data points are in use,  
you can add data points by using two or more profiles for a single test  
configuration. If you do this, you must select the profile you need (from the  
Menu) for the range of frequencies being measured. This means that you  
must select a different profile whenever the measured frequency moves  
outside the range of frequencies defined by the data points in the  
currently selected profile.  
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Chapter 1 Getting Started  
Operating the Counter  
Selecting a Power-Correction Profile  
The diagram on page 1-29 shows how to turn Power Correction on or off  
and how to select a power-correction profile.  
NOTE  
Pressing the Enter key when the number of a power-correction profile  
(1-9) is displayed selects that profile, enables Power Correction, and exits  
the Menu. If you intend to enter data in the currently displayed profile,  
press the right-arrow key instead of the Enter key to select the  
power-correction profile without exiting the Menu.  
Entering Data Points in a Power-Correction Profile  
The diagram on page 1-30 shows how to enter data points (frequency and  
loss values) in power-correction profiles. A minimum of two valid data  
points is required for Power Correction; you can enter up to ten data  
points in each power-correction profile. Each of the power-correction  
profiles initially contains two valid data points—0.0 dB loss at 1 GHz,  
and 0.0 dB loss at the highest frequency the Counter can measure  
(20 GHz for the 53150A, 26.5 GHz for the 53151A, or 46 GHz for the 53152A).  
The remaining eight data points contain values of 0.0 dB loss at 0.0 GHz.  
When entering data, you can change the values in an existing data point  
or enter new values in a data point that currently has zero values.  
1-28  
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Ch  
2
Freq  
dBm  
Pwr  
Ch  
2
Freq  
Shift  
dBm  
Pwr  
Shift  
Menu  
Reset/  
Local  
Ch  
2
Freq  
Enter  
dBm  
Pwr  
Shift  
NOTE  
When Power Correction is enabled, a lower-case letter “c” is displayed in  
the hundredths position of the power display.  
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Operating the Counter  
dB  
dB  
dB  
dB  
+/-  
dB  
1-30  
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Chapter 1 Getting Started  
Operating the Counter  
NOTES  
Pressing the Enter key after entering values exits the Menu and restores  
the measurement display. To remain in the Power Correction menu so you  
can enter or change values in another data point in the currently selected,  
press the left-arrow key repeatedly (after entering the values for a data  
point) until “PWR CORR” is re-displayed, and then press the up- or down-  
arrow key to choose the next data point you want to edit.  
When you are entering or editing values in data points, the 10 single-line  
annunciators that are part of the analog power display are used to  
indicate which data point is being displayed. The left-most annunciator  
indicates that the data displayed is contained in the lowest data point,  
data point 1. When the first two annunciators on the left are activated,  
this indicates data point 2, and so on through data point 10, which is  
indicated by all 10 annunciators.  
The Power Correction function can be used to correct for gain from  
amplification as well as for loss from attenuation. Since Power Correction  
is intended primarily to correct for loss, loss values are entered as positive  
numbers. To enter values for gain, use the Sign key (+/–) to change the  
sign of the value you enter.  
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Chapter 1 Getting Started  
Operating the Counter  
Setting the Measurement Rate  
The measurement rate determines how frequently the Counter takes  
measurements. You can set the measurement rate to FAST, MED  
(medium), SLOW, or HOLD (single measurement taken each time you  
press the Reset/Local key).  
Ch  
2
Freq  
Rate  
Ch  
2
Freq  
Enter  
Hold  
1-32  
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Chapter 1 Getting Started  
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Setting the Number of Averages  
You can set the number of measurements the Counter takes and averages  
before displaying the result. The default setting is one (no average  
computations are performed when the number of averages is set to one),  
and the maximum setting is 99. Note that the tens position (10 through 90)  
and the units position (0 through 9) are adjusted separately, and that you  
cannot set the number of averages to zero.  
Ch  
1
Freq  
Avg  
Ch  
1
Freq  
Enter  
Enter  
Avg On  
Ch  
1
Freq  
Avg On  
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Chapter 1 Getting Started  
Operating the Counter  
NOTE  
For most of the Counter’s settings, when you continue to press either the  
up-arrow or the down-arrow key when you reach the end of the available  
settings, the value for the setting “rolls over” to the value at the opposite  
end of the range. For example, if the GPIB address is set to 31, and you  
press the up-arrow key, the value changes to one.  
However, when you adjust the value in the units position for the number  
of measurements to be averaged, rollover does not occur. If you press the  
up-arrow when the value in the tens position is zero and the value in the  
units position is nine, or if you press the down-arrow when the value in  
the tens position is zero and the value in the units position is one, there is  
no change. If the value in the units position could roll over (in either  
direction), it would allow you to set a value of zero for the number of  
averages. Since at least one measurement must be taken, zero is an  
illegal value.  
NOTE  
When the resolution setting is high (e.g., 1 Hz), and a large number of  
averages is selected, it takes a considerable amount of time for the  
Counter to take the measurements, compute the averages, and display a  
reading. As a result, the rate at which the display is updated is  
considerably slower than at small numbers of averages and lower  
resolution settings. For example, when the resolution is set to 1 Hz,  
and the number of averages is set to 60, a new reading is displayed every  
60 seconds (approximately).  
Setting the Resolution  
Since less time is required to compute each measurement as the  
resolution of the measurements is reduced, the resolution setting affects  
the rate at which measurements are taken and displayed, as well as the  
number of digits displayed for the measurements. As a result, the rate at  
which the Gate indicator flashes changes when you change the resolution.  
As shown in the procedure in the diagram on the next page, the available  
resolution settings are 1 Hz (the default setting), 10 Hz, 100 Hz, 1 KHz,  
10 KHz, 100 KHz, and 1 MHz.  
1-34  
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Chapter 1 Getting Started  
Operating the Counter  
Ch  
2
Freq  
Resol  
Ch  
2
Freq  
Enter  
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Operating the Counter  
1-36  
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2
Operating Your Frequency Counter  
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Chapter 2 Operating Your Frequency Counter  
Introduction  
Introduction  
This chapter contains information and usage procedures for the  
front-panel keys, operating functions, and menus of the  
Agilent 53150A/151A/152A Microwave Frequency Counter.  
Chapter Summary  
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
How this Counter Works for You  
Summary of the Measurement Sequence  
Using the Selection Keys  
pg. 2-3  
pg. 2-4  
pg. 2-5  
Numeric Entry  
pg. 2-6  
Changing States  
pg. 2-7  
Acknowledging Messages  
pg. 2-9  
Using the Clear and Reset/Local Keys  
Other Function Selection Keys  
Measuring Frequency  
pg. 2-9  
pg. 2-10  
pg. 2-12  
pg. 2-14  
pg. 2-17  
pg. 2-20  
pg. 2-21  
pg. 2-24  
pg. 2-26  
pg. 2-27  
pg. 2-30  
pg. 2-39  
Setting the Resolution and Measurement Rate  
Setting the Number of Averages  
Measuring Relative Frequency  
Offsetting a Frequency Measurement  
Measuring Power  
Measuring Relative Power  
Offsetting a Power Measurement  
Using Power Correction  
Using the Menu  
2-2  
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Chapter 2 Operating Your Frequency Counter  
How this Counter Works for You  
How this Counter Works for You  
The following is a list of some of the key things the Counter does for you.  
•
•
Presets the menus to default states and values at power-up  
The Counter’s Menu key and other front-panel keys allow you to select  
such things as the timebase source, the GPIB address, and the RS-232  
serial-port baud rate. The Counter also allows you to store your  
selections in non-volatile memory; thus, these settings are not lost  
when power has been off or after a remote-interface reset.  
•
•
•
Automatically displays measurement(s) when you have selected a  
measurement function.  
Accepts your entry for a menu item when you press the Enter key.  
You must press the Enter key to complete each setting and/or selection.  
Saves user configuration settings.  
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Chapter 2 Operating Your Frequency Counter  
Summary of the Measurement Sequence  
Summary of the Measurement Sequence  
1. Turn on the Main ~ Power switch on the back panel, and then press and  
release the POWER button on the front panel.  
NOTE  
The internal Reference Oscillator receives power only when the  
Main ~ Power switch is on. Therefore, the frequency of the reference signal  
may drift until the oscillator stabilizes. Specifications for the stability of  
the standard internal timebase and the optional Oven Timebase are  
provided in Chapter 3.  
2. Connect the input signal to the appropriate input connector (Channel 1  
or Channel 2).  
3. Connect an external reference signal to the External Reference  
connector on the back panel (if desired).  
4. Press the Chan Select key to select the input channel (if necessary).  
5. Press the Display Power key if you need to measure power (Channel 2  
only).  
6. Press the frequency and/or power Offset On/Off keys to enable offset  
measurements (if desired), and then use the Freq Offset (Shift + Rate)  
and/or Pwr Offset (Shift + Avg) keys to enter the offset values.  
7. Use the Resol, Rate, and Avg keys to configure the display.  
8. Use the Menu (Shift + Reset/Local) key to set the reference-oscillator  
source, to select the Channel 1 low-pass filter, to configure the  
Counter’s response to frequency modulation, to enable and configure  
Power Correction, and/or to select a previously saved set of user  
settings.  
9. If you intend to operate the counter remotely using the GPIB, use the  
GPIB (Shift + Resol) key to configure the GPIB.  
10. If you intend to operate the counter remotely using the serial  
interface, use the Menu (Shift + Reset/Local) key to adjust the serial  
port Baud rate.  
2-4  
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Chapter 2 Operating Your Frequency Counter  
Using the Selection Keys  
Using the Selection Keys  
There are six Selection keys—four “arrow” keys, the Enter key, and the  
sign (+/–) key. The functions of the arrow keys depend on the Counter’s  
operating mode (i.e., sequencing through choices in the Menu, numeric  
entry, state change, etc.). This section describes how the Selection keys  
function in these different operating modes.  
Sequencing Through the Menu  
To access the Menu, press the Shift key, and then press the Menu  
(Reset/Local) key.  
Menu  
•
Press the up- or down-arrow key to go forward to the next menu  
function or back to the previous menu function. Pressing either of these  
keys repeatedly cycles through the list of menu functions.  
Reset/  
Local  
Shift  
•
Press the right-arrow key to select a function. When you do this, the  
flashing annunciator ( ) changes direction and the current setting  
flashes to indicate that you can now use the up- and down-arrow keys  
to cycle through the available settings.  
•
Press the up- or down-arrow key to move through the list of available  
settings for a function. Pressing either of these keys repeatedly cycles  
through the list of settings.  
+/-  
Enter  
•
•
Press the Sign (+/–) key to change the sign of numeric values.  
Press the Enter key to accept the currently displayed setting and exit  
the Menu.  
NOTE  
In most cases, when you reach the top or bottom of a list of settings, or the  
left or right end of a numerical field, the focus rolls over to the opposite  
end of the list of settings, or wraps around to the opposite end of the  
numeric field. In some situations, however, this does not occur, because if  
it did, you could choose an illegal setting. For these settings, you have to  
use the opposite button to cycle back through the values or settings.  
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Chapter 2 Operating Your Frequency Counter  
Using the Selection Keys  
Numeric Entry  
Several menu functions, and several functions that have dedicated keys  
on the front panel, require you to enter numeric values.  
•
•
Press the (left-arrow) and (right-arrow) keys to move left and  
right to select adjustable digits (the selected digit flashes).  
Press the  
(up-arrow) and/or  
(down-arrow) key to increment and  
decrement the selected (flashing) digit of the displayed value (see note  
on previous page).  
+/-  
Enter  
•
•
Press the Sign (+/–) key to change the sign of the numeric value.  
Press the Enter key to complete a numeric entry. (If you change the  
value of a numeric entry, but you forget to press the Enter key, the  
value of the entry is not changed.)  
2-6  
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Chapter 2 Operating Your Frequency Counter  
Using the Selection Keys  
Changing States  
Several menu functions, and several functions that have dedicated keys  
on the front panel, require you to choose from a list of available states.  
These functions and the states you can choose for each of them are:  
•
Reference Oscillator (REF OSC)  
–
–
Internal (INT)  
External (EXT)  
•
Serial Port Baud Rate (BAUD)  
–
–
–
–
–
–
1200  
2400  
4800  
9600  
14400  
19200  
•
•
•
Frequency Modulation (FM)  
–
–
Automatic (AUTO)  
Off (OFF)  
Channel 1 Low-Pass Filter (CH1 LPF)  
–
–
On (ON)  
Off (OFF)  
Measurement Rate (Rate key)  
–
–
–
–
Fast (FAST)  
Medium (MED)  
Slow (SLOW)  
Hold (HOLD)  
•
Resolution (Resol key)  
1 Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz  
–
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Chapter 2 Operating Your Frequency Counter  
Using the Selection Keys  
Use the Selection keys as described below to change the state of these  
functions:  
•
When the annunciator ( ) in the display flashes, press the right-arrow  
key to move the focus from the displayed menu function (or front-  
panel-key function) to the setting for that function.  
•
Press the up- or down-arrow key to cycle through the available choices.  
Press the Enter key to complete the setting. (If you change the setting of a  
function, but you forget to press the Enter key, the setting of the function  
is not changed.)  
NOTE  
The Sign key has no function and is ignored in menu selections and  
front-panel functions that have state-change selections only.  
2-8  
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Chapter 2 Operating Your Frequency Counter  
Using the Clear and Reset/Local Keys  
Using the Clear and Reset/Local Keys  
The Clear key and the Reset/Local key have similar functions in the  
Menu and in other front-panel-key function settings, but their effects vary  
with the Counter’s state and condition. In general, the Reset/Local key  
restores the setting that was in effect when you entered the Menu or  
front-panel-key function, but it does not close the Menu or the  
function-setting display. The Clear key also restores the previous setting,  
but it closes the Menu or the front-panel-key function-setting display at  
the same time.  
Freq  
Menu  
Offset  
Reset/  
Local  
Rate  
On/Off  
Clear  
If you press the Reset/Local key while the Counter is taking  
measurements, it resets the current operation and forces the Counter to  
reacquire and re-measure the signal.  
Shift  
Pressing the Reset/Local key while the Counter is in Remote Mode forces  
the Counter into Local Mode and enables all of the front-panel controls.  
Acknowledging Messages  
When a message is displayed, press the Reset/Local key, the Clear key,  
or the Enter key (after reading the message) to acknowledge it and erase it  
from the display.  
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Chapter 2 Operating Your Frequency Counter  
Other Function Selection Keys  
Other Function Selection Keys  
There are several functions that you access directly from front-panel keys  
(not from within the Menu). These functions are:  
MODIFY  
GPIB  
•
•
•
•
Measurement Rate (Rate key)  
Number of Averages (Avg key)  
Display Resolution (Resol key)  
GPIB Address (GPIB key)  
Freq  
Pwr  
Offset  
Offset  
Rate  
Avg  
Resol  
On/Off  
Clear  
+/-  
Enter  
Use the Selection keys in the manner described earlier in this chapter  
(see “Numeric Entry” and “Changing States”) to adjust the settings for  
these functions. Detailed procedures for using the Rate, Avg, Resol, and  
GPIB keys are provided later in this chapter.  
There are also a number of functions that are toggled between states  
(no selections are displayed) using named front-panel keys. These are:  
MO  
•
•
•
•
Display backlight on and off (  
the On/Off / Clear key.  
On/Off). Press Shift, and then press  
Freq  
Offset  
Pwr  
Offset  
Rate  
Avg  
Channel selection (Chan Select). Press Chan Select to switch between  
the two input channels.  
On/Off  
Clear  
+/-  
Display power measurement (Display Power). Press Display Power to  
turn the power-measurement function on and off.  
Frequency offset measurement (FREQ Offset On/Off). Press the Offset  
On/Off key in the FREQ area of the front panel to turn the frequency  
offset function on or off.  
FREQ  
Gate  
POWER  
Channel 2  
dBm/ W  
•
Power offset measurement (POWER Offset On/Off). Press the Offset  
On/Off key in the POWER area of the front panel to turn the power  
offset function on or off (the Display Power function must be on).  
Chan  
Select  
Display  
Power  
Rel Freq  
Rel Pwr  
Offset  
On/Off  
Offset  
On/Off  
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Chapter 2 Operating Your Frequency Counter  
Other Function Selection Keys  
•
•
Relative frequency measurement (Rel Freq). Press Shift, and then  
press the Rel Freq (Offset On/Off) key to measure the difference in  
frequency between the current measurement and the measurement  
taken at the time you pressed the Rel Freq key (drift).  
Relative power measurement (Rel Pwr). Press Shift, and then press the  
Rel Pwr (Offset On/Off) key to measure the difference in power  
between the current measurement and the measurement taken at the  
time you pressed the Rel Pwr key.  
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Chapter 2 Operating Your Frequency Counter  
Measuring Frequency  
Measuring Frequency  
1
2
Connect the Counter to a power source, and set the  
Main ~ Power switch on the back panel to 1 (on).  
Main ~ Power  
If the Counter is connected to an AC power source, the Main AC Power  
indicator on the back panel and the Standby indicator on the front panel  
light. If the Counter is connected to an external DC power source or is  
operated from internal batteries (with Battery option only), the Standby  
indicator lights, but the Main AC Power indicator does not.  
Press the POWER button on the front panel.  
The Standby indicator goes off, and all segments of the front-panel display  
are temporarily activated. TESTING is displayed while the Counter  
performs its power-on self-test. If the Counter passes all of the tests,  
SELF TEST OK is displayed, and the Counter then displays its model  
number, firmware version number, GPIB address, and CH2 NO SIGNAL.  
The Counter is now ready to measure the frequency of a signal applied to  
the Channel 2 input. Note that the Ch 2 and Freq annunciators are activated.  
POWER  
Standby  
3
Connect an input signal to Channel 2.  
CAUTION  
The Channel 2 input path circuits contain sensitive GaAs semiconductors.  
To prevent damage to these components, always adhere to standard ESD  
(ElectroStatic Discharge) prevention procedures, and ensure that the  
maximum power specification for this channel (+27 dBm) is not exceeded.  
The Counter automatically displays the measured frequency of the input  
signal. To set the resolution, measurement rate, and/or the number of  
averages, see the appropriate procedure in the section titled “Operating  
the Counter,” or refer to “Setting the Resolution,” “Setting the  
Measurement Rate,” and “Setting the Number of Averages,” later in this  
chapter.  
CHANNEL 2  
50 MHz to 20 GHz  
DAMAGE  
+27 dBm  
50 Ω  
2-12  
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Chapter 2 Operating Your Frequency Counter  
Measuring Frequency  
NOTE  
When the frequency of a signal applied to the Channel 2 input exceeds the  
maximum rated frequency for the instrument, the Counter displays  
CH2 TOO HIGH.  
4
To measure the frequency of a signal applied to the Channel 1  
input, press the Chan Select key.  
CHANNEL 1 is displayed momentarily, and the Ch 1 and Freq annunciators  
are activated. If a signal is presently applied to the Channel 1 input, the  
measured frequency is then displayed. If no signal is applied, CH1 NO  
SIGNAL is displayed until an input signal is connected to the Channel 1  
input connector.  
FREQ  
Gate  
Chan  
Select  
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Chapter 2 Operating Your Frequency Counter  
Setting the Resolution and Measurement Rate  
Setting the Resolution and Measurement Rate  
The number of measurements the Counter makes in a given amount of  
time is affected by the Rate setting, the Resolution setting, and the quality  
of the input signal (signal quality affects the amount of time the Counter  
requires to determine an accurate measurement). By adjusting the  
Resolution and Rate settings, you can affect how often the Counter  
takes measurements.  
Setting the Resolution  
The Counter’s resolution setting determines the number of digits displayed  
for measurements and the precision of the measurements. Since less time  
is required to compute each measurement as the resolution of the  
measurements is reduced, the resolution setting also affects the rate at  
which measurements are taken and displayed. As a result, the flash rate  
of the Gate indicator changes when you change the resolution.  
The numerals shown for the value of the measurement are displayed in  
four groups of three digits, as shown below (the leading zero is suppressed):  
GHz  
MHz  
kHz  
Hz  
Ch  
2
Freq  
2-14  
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Chapter 2 Operating Your Frequency Counter  
Setting the Resolution and Measurement Rate  
Resolution Setting Example  
For the following example, use the 10 MHz output from the reference  
timebase as the input to Channel 1.  
1
2
Press the Resol key to enter the resolution-setting mode.  
GPIB  
Resol  
The current resolution setting is displayed (the current value and the  
indicator between the arrow keys are flashing to indicate that you can use  
the up- and down-arrow keys to change the setting).  
Enter  
Press the up-arrow or down-arrow key to decrease or increase  
the resolution.  
You can press these keys as many times as necessary to locate the setting  
you want to use. The available resolution settings are 1 Hz (the default  
setting), 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, and 1 MHz.  
3
Press the Enter key to activate your setting and exit the  
resolution-setting mode.  
The setting you chose is now in effect. The number of digits displayed for  
the measurement is adjusted accordingly; you can observe the affect on  
measurement speed by monitoring the flash rate of the Gate indicator.  
NOTE  
The measurement resolution has a direct effect on the amount of time the  
Counter requires to complete a measurement. Measurements made at the  
Counter’s maximum resolution setting (1 Hz) are noticeably slower than  
at lower resolutions. This is especially noticeable when the Counter is set  
to average a number of measurements.  
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Chapter 2 Operating Your Frequency Counter  
Setting the Resolution and Measurement Rate  
Setting the Measurement Rate  
The measurement Rate setting determines how frequently the counter  
initiates measurements. Since the actual measurement rate is also  
affected by the resolution setting and the signal quality, as mentioned  
earlier, the available rate settings (FAST, MED, and SLOW) do not equate  
to a fixed number of measurements in a given amount of time.The HOLD  
setting turns off automatic measurements, so that a single measurement  
is made each time you press the Reset/Local key.  
Rate Setting Example  
1
2
Press the Rate key to enter the rate-setting mode.  
Freq  
Offset  
Rate  
The current rate setting is displayed (the current value and the indicator  
between the arrow keys are flashing to indicate that you can use the up-  
and down-arrow keys to change the setting).  
On/Off  
Clear  
Press the up-arrow or down-arrow key to decrease or increase the  
measurement rate.  
You can press these keys as many times as necessary to locate the setting  
you want to use. The available resolution settings are FAST, MED, SLOW,  
and HOLD.  
3
4
Press the Enter key to activate your setting and exit the rate-  
setting mode.  
The setting you chose is now in effect. The measurement rate is adjusted  
accordingly; you can observe the effect on measurement speed by  
monitoring the flash rate of the Gate indicator. There is no annunciator  
on the display for the rate setting, unless you set the rate to HOLD.  
If you set the rate to HOLD, press the Reset/Local key to initiate  
a measurement.  
Hold  
The Counter displays the MEASURING message while it computes the  
measurement, and then displays the result. Press the Reset/Local key  
again each time you want to take an additional measurement.  
2-16  
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Chapter 2 Operating Your Frequency Counter  
Setting the Number of Averages  
Setting the Number of Averages  
You can set the Counter to take a variable number of frequency, power,  
or voltage measurements and average them mathematically before  
displaying the result. You can use this feature to determine the effective  
measurement of a signal that is fluctuating. When measuring the  
frequency of a fluctuating signal, you can also use averaging to retain  
some of the precision of a maximum-resolution measurement.  
The default number of averages is 1, which means that no averages are  
performed, and the maximum setting is 99. Note that the tens position  
(10 through 90) and the units position (0 through 9) are adjusted  
separately, and that it is not possible to set the number of averages to 0.  
NOTE  
When a large number of averages is selected for a frequency measurement  
in combination with a high resolution setting (e.g., 1 Hz), it takes a  
considerable amount of time for the Counter to take the measurements,  
compute the averages, and display an initial reading. For example, when  
the number of averages is set to 60, and the resolution is set to 1 Hz, the  
first reading is displayed after 60 seconds (approximately). Subsequent  
computations do not require as much time, since the averaging function  
computes a running average. However, the rate at which the display is  
updated after the initial average computation is also slower than at lower  
resolution settings.  
Averages Setting Example  
1
2
Press the Avg key to enter the averages-setting mode.  
Pwr  
Offset  
Avg  
The current averages setting is displayed (the current value and the  
indicator between the arrow keys are flashing to indicate that you can use  
the up- and down-arrow keys to change the setting).  
+/–  
Press the up-arrow or down-arrow key to decrease or increase the  
value for the units position of the number of averages.  
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Chapter 2 Operating Your Frequency Counter  
Setting the Number of Averages  
NOTE  
For most of the Counter’s settings, when you continue to press either the  
up-arrow or the down-arrow key when you reach the end of the available  
settings, the value for the setting “rolls over” to the value at the opposite  
end of the range. For example, if the GPIB address is set to 31, and you  
press the up-arrow key, the value changes to 1. However, when you adjust  
the value in the units position for the number of measurements to be  
averaged, rollover does not occur. If you press the up-arrow when the  
value in the tens position is 0 and the value in the units position is 9, or if  
you press the down-arrow when the value in the tens position is 0 and the  
value in the units position is 1, there is no change. If the value in the units  
position could roll over (in either direction), it would allow you to set a  
value of 0 for the number of averages. Since at least one measurement  
must be taken, 0 is an illegal value.  
3
4
Press the left-arrow key once to move the focus to the tens  
position, and then use the up- and/or down-arrow key to set the  
value for the tens position (if desired).  
Note that the tens and units values are set separately.  
Press the Enter key to activate your setting and exit the averages-  
setting mode.  
The Avg On annunciator is activated, and the Counter displays AVERAGING  
while it takes the first set of measurements. The length of time that the  
AVERAGING message is displayed varies primarily with setting for the  
number of averages, since this determines the number of measurements  
that must be made and averaged before displaying a result. When the first  
set of averages is complete and the result is displayed, the Counter  
immediately takes another measurement, discards the oldest  
measurement included in the current average computation, recomputes  
the average and displays the new result. This continues until you change  
the setting for the number of averages or disable averaging (by setting the  
number of averages to 0).  
Ch 12  
Rel Freq  
Avg On  
2-18  
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Chapter 2 Operating Your Frequency Counter  
Setting the Number of Averages  
In certain situations, the length of time that the AVERAGING message is  
displayed can be affected by additional factors. When you are measuring  
frequency, the current resolution setting, the rate setting, and the quality  
of the signal all affect the length of time required to make the  
measurements and complete the average computation.  
If the measurement rate is set to HOLD, and a value larger than 1 is set  
for averages, the first set of measurements is not initiated until you press  
the Reset/Local key. When you do, the Counter displays the AVERAGING  
message while it takes the first set of measurements. When the first set of  
measurements is complete, and the averaging result is displayed, the  
Counter remains in this state until you press the Reset/Local key to  
initiate another set of measurements, change the value for averages back  
to one, or change the setting for the measurement rate to SLOW, MED,  
or HIGH. When the measurement rate is set to HOLD, the Counter performs a  
block-average computation instead of a running-average computation.  
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Chapter 2 Operating Your Frequency Counter  
Measuring Relative Frequency  
Measuring Relative Frequency  
You can measure the difference in frequency from one measurement to  
another (frequency drift) or between two separate input signals using the  
Relative Frequency function.  
Relative Frequency Example  
Press the Shift key, and then press the Rel Freq (FREQ Offset On/Off)  
key. The Shift annunciator activates when you press the Shift key. When  
you press the Rel Freq (FREQ Offset On/Off) key, the Shift annunciator  
disappears, and the Rel Freq annunciator in the upper-left corner of the  
display activates. At the same time, the Counter saves the frequency  
measurement it was displaying at the time you pressed the Rel Freq key,  
and it computes and displays the difference between that measurement  
and the current measurement.  
Ch  
2
Rel Freq  
You can also use the Relative Frequency function to measure the  
difference between two different signals. To do this, activate the Relative  
Frequency function, as described in the previous paragraph, disconnect  
the cable supplying the signal to the input connector, and then connect the  
second signal to the same input connector. The value displayed when the  
Counter acquires the second signal is the frequency difference between  
the two signals.  
2-20  
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Chapter 2 Operating Your Frequency Counter  
Offsetting a Frequency Measurement  
Offsetting a Frequency Measurement  
You can use the Frequency Offset (Freq Offset) function to add or subtract  
a constant value to/from a frequency measurement. For example, you can  
use an offset to compensate for a systematic error or to display the  
difference in frequency between two signals.  
To display an offset frequency measurement, you need to set the value and  
sign (+/–) of the offset and to turn the Frequency Offset function on. In the  
following example, the Frequency Offset function is enabled first, and the  
offset value is then entered. However, the order doesn’t matter, so you can  
also enter the offset value first, and then turn the offset function on.  
Frequency Offset Example  
1
Connect a cable from the 10 MHz reference output on the back  
panel to the Channel 1 input connector, and press the Chan Select  
key (if necessary) to activate Channel 1.  
The display should look like this:  
GHz  
MHz  
kHz  
Hz  
Ch 1  
Rel Freq  
2
Press the Shift key, and then press the Freq Offset (Rate) key.  
The Shift annunciator activates when you press the Shift key. When you  
press the Freq Offset key, the Shift annunciator disappears, and the Freq  
Offset annunciator at the left side of the display activates.  
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Chapter 2 Operating Your Frequency Counter  
Offsetting a Frequency Measurement  
3
4
Use the left- and right-arrow keys to move the focus to the digit(s)  
in the frequency-offset display that you need to adjust to enter the  
offset value, and then use the up- and down-arrow keys to adjust  
the value for each digit. Enter a value of 500 Hz.  
The flashing digit is the digit that currently has the focus. This means  
that you can change the value of the flashing digit using the up- and  
down-arrow keys.  
Press the sign (+/–) key (if desired) to change the sign of the offset  
value.  
The display should look like this:  
GHz  
MHz  
kHz  
Hz  
Ch 1  
Rel Freq  
Offset  
5
Press the Enter key to confirm the offset value and exit the  
offset-entry display.  
The Freq Offset annunciator is deactivated, and the measurement  
display returns.  
NOTE  
When you are entering a value for Frequency Offset (or Power Offset),  
you can use the Reset key to restore all of the displayed digits to zero.  
These are the only two functions in which the Reset key has this effect.  
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Chapter 2 Operating Your Frequency Counter  
Offsetting a Frequency Measurement  
6
Press the Offset On/Off key.  
The Freq Offset annunciator is activated, and the value of the display is  
adjusted to reflect the value and sign of the offset entered in Steps 2 and 3.  
The display should look like this:  
GHz  
MHz  
kHz  
Hz  
Ch 1  
Rel Freq  
Offset  
Since the offset function can be used to add or subtract a fixed value  
to/from the measurement result, you can use this feature to tune or align  
the odd frequencies of a local oscillator (LO). If you enter the target  
frequency as a negative offset, the Counter displays the difference  
between the LO’s frequency and the target frequency. You can then adjust  
the LO until the Counter displays a value of zero.  
NOTE  
The maximum value that can be entered for Frequency Offset is  
49,999,999,999 Hz.  
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Chapter 2 Operating Your Frequency Counter  
Measuring Power  
Measuring Power  
The Agilent 53150A/53151A/53152A can also measure signal power  
(in the same frequency ranges as for frequency measurements) on  
Channel 2. The power measurement, which is shown in a dedicated area  
of the display, includes a digital readout and an analog representation  
that is useful when peaking signals. The display can be configured to show  
power in units of dB, dBm, W, mW, µW, and percentage (%).  
CAUTION  
The Channel 2 input path circuits contain sensitive GaAs semiconductors.  
To prevent damage to these components, always adhere to standard ESD  
(ElectroStatic Discharge) prevention procedures, and ensure that the  
maximum power specification for this channel (+27 dBm) is not exceeded.  
Power Measurement Example  
This example assumes that a signal is currently applied to the Channel 2  
input connector.  
1
Press the Display Power key to enable power measurement.  
The Pwr annunciator at the left side of the display is activated, and the  
Counter’s digital and analog power displays show the power measurement  
in dB or dBm (the default units of measurement).  
The display should look like this:  
Ch 12  
Rel Freq  
dB  
dBm  
Watts  
mW  
uW  
%
Rel Pwr  
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Chapter 2 Operating Your Frequency Counter  
Measuring Power  
2
Press the Shift key, and then press the dBm/W (Display Power) key.  
When you press the Shift key, the Shift annunciator is activated. When you  
press the dBm/W (Display Power) key, the Shift annunciator goes off, and  
the units of measurement annunciator group to the right of the digital power  
measurement changes from dB or dBm to W, mW, or µW, as shown below:  
Ch 12  
Rel Freq  
dB  
dBm  
Watts  
mW  
uW  
%
Rel Pwr  
NOTE  
When the power of a signal applied to the Channel 2 input exceeds the  
maximum rated power for the instrument, the Counter displays HI.  
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Chapter 2 Operating Your Frequency Counter  
Measuring Relative Power  
Measuring Relative Power  
You can measure the difference in power from one measurement to another  
or between two separate input signals using the Relative Power function.  
Relative Power Example  
Press the Shift key, and then press the Rel Pwr (PWR Offset On/Off) key.  
The Shift annunciator activates when you press the Shift key. When you  
press the Rel Pwr key, the Shift annunciator disappears, and the Rel Pwr  
annunciator at the left side of the display activates. At the same time, the  
Counter saves the power measurement it was displaying at the time you  
pressed the Rel Pwr key, and it computes and displays the difference in  
power between that measurement and the current measurement.  
Ch 12  
Rel Freq  
Rel Pwr  
NOTE  
When the Counter is set to measure power in dBm, relative power is  
expressed in dB. When the Counter is set to measure power in Watts, mW,  
or, µW, power relative power is expressed as a percentage (%).  
You can also use the Relative Power function to measure the difference in  
power between two different signals. To do this, activate the Relative  
Power function, as described in the previous paragraph, disconnect the  
cable supplying the signal to the input connector, and then connect the  
second signal to the same input connector. The value displayed when the  
Counter acquires the second signal is the power difference between the  
two signals.  
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Chapter 2 Operating Your Frequency Counter  
Offsetting a Power Measurement  
Offsetting a Power Measurement  
You can use the Power Offset (Pwr Offset) function to add or subtract a  
constant value to/from a power measurement. For example, you can use  
an offset to compensate for a systematic error, to display the difference in  
power between two signals, or to compensate for losses and attenuation in  
cables or components that are between the signal source and the Counter.  
To display an offset power measurement, you set the value and sign (+/–)  
of the offset and turn the Power Offset function on. In the following  
example, the Power Offset function is enabled first, and the offset value is  
then entered. However, the order doesn’t matter, so you can also enter the  
offset value first, and then turn the offset function on.  
Power Offset Example  
1
Connect a signal to the Channel 2 input connector, and activate  
power measurement by pressing the Display Power key.  
The display should look like this (except for the values, which are  
simulated in the illustration):  
Ch 12  
Rel Freq  
dB  
dBm  
Watts  
mW  
uW  
%
Rel Pwr  
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Chapter 2 Operating Your Frequency Counter  
Offsetting a Power Measurement  
2
Press the Shift key, and then press the Pwr Offset (Avg) key.  
The Shift annunciator activates when you press the Shift key. When you  
press the Pwr Offset key, the Shift annunciator and the frequency display  
disappear, the Pwr Offset annunciator at the left side of the display  
activates, and the power offset value is set to 00.00, as shown below:  
Ch 12  
Rel Freq  
dB  
dB  
Watts  
Rel Pwr  
Offset  
mW  
uW  
%
3
Use the left- and right-arrow keys to move the focus to the digit(s)  
in the power-offset display that you need to adjust to enter the  
offset value, and then use the up- and down-arrow keys to adjust  
the value for each digit.  
The flashing digit is the digit that currently has the focus. This means  
that you can change the value of the flashing digit using the up- and  
down-arrow keys.  
NOTE  
If you enter a value for Power Offset that results in a power reading that  
is out of the Counter’s specified power-measurement range, the Counter  
displays HI in the power display when the Power Offset function is  
enabled.  
4
Press the Sign (+/–) key (if desired) to change the sign of the  
offset value.  
Ch 12  
Rel Freq  
dB  
dB  
Watts  
Rel Pwr  
Offset  
mW  
uW  
%
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Chapter 2 Operating Your Frequency Counter  
Offsetting a Power Measurement  
5
6
Press the Enter key to confirm the offset value and exit the offset-  
entry display.  
The Pwr Offset annunciator is deactivated, and the measurement display  
returns.  
Press the Offset On/Off key (in the POWER area of the front panel).  
The Pwr Offset annunciator is activated, and the value of the display is  
adjusted to reflect the value and sign of the offset entered in Steps 3 and 4.  
The display should now look like this (values are simulated):  
Ch 12  
Rel Freq  
dB  
dB  
Watts  
Rel Pwr  
Offset  
mW  
uW  
%
NOTE  
When you are entering a value for Power Offset (or Frequency Offset),  
you can use the Reset key to restore all of the displayed digits to zero.  
These are the only two functions in which the Reset key has this effect.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
Using Power Correction  
The Power Correction function in the main Menu allows you to set the  
Counter to automatically compensate for power loss (or gain) that occurs  
in the test configuration, such as attenuation resulting from cable  
impedance. You can choose from nine power-correction profiles that are  
stored in nonvolatile memory, and you can modify the contents of these  
profiles.  
Each profile is defined by two to ten data points (a data point consists of a  
loss value and a frequency value). When Power Correction is enabled, the  
Counter automatically adds a correction to the power reading (determined  
from the data points in the profile) that compensates for the loss (or gain)  
at the frequency being measured. When a measured frequency does not  
match any of the frequency values defined in the currently selected  
profile, the Counter interpolates for the measured frequency to determine  
the appropriate loss value to add to the power measurement.  
A minimum of two valid data points is required for Power Correction; you  
can enter up to ten data points in each power-correction profile. Each of  
the power-correction profiles initially contains two valid data points—  
0.0 dB loss at 1 GHz, and 0.0 dB loss at the highest frequency the Counter  
can measure (20 GHz for the 53150A, 26.5 GHz for the 53151A, or 46 GHz  
for the 53152A). The remaining eight data points contain values of 0.0 dB  
loss at 0.0 GHz. When entering data, you can change the values in an  
existing data point or enter new values in a data point that currently has  
zero values. The data points are automatically sorted into order by  
frequency as you finish entering each one.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
Power Correction Theory of Operation  
When the Counter interpolates between data points to determine the  
amount of correction to apply to the current measurement, it computes the  
correction based on a straight line plotted between the frequency values in  
the two closest data points. Therefore, a graph of a power-correction  
profile would show a “curve” that consists of two to nine straight-line  
segments, rather than a true curve, as shown below.  
P
o
w
e
r
F r e q u e n c y  
NOTE  
When the frequency value of a signal is beyond either end of the curve  
specified by the values in the currently selected profile’s data points,  
the Counter computes a correction by extending the straight line defined  
in the last two data points in the profile.  
As the graph above shows, the Counter never computes power-correction  
values for loss above the zero axis. Conversely, corrections are never  
computed for gain below the zero axis. When the Counter interpolates for  
frequencies that are above or below the range of frequencies specified in  
the currently selected profile, it never computes a value that would fall on  
the opposite side of the zero axis from the closest specified frequency.  
In other words, if there are two or more data points that contain loss  
values, the Counter never computes or applies a correction that would be  
indicative of gain. Conversely, if there are two or more data points that  
contain gain values (negative loss values), the Counter never applies a  
correction that would be indicative of loss.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
Since there can be no further change in the loss or gain values once the  
zero axis is reached, no power corrections are applied when the input  
frequency reaches or passes a point in the profile that intersects the zero  
axis. Effectively, the Counter computes only loss-correction values or gain-  
correction values—never both within the same profile.  
When you enter values in power-correction data points and then exit the  
data-point display (using either the left-arrow key or the Enter key),  
the Counter immediately sorts all of the data-points into order by the  
frequency values. Therefore, if you enter a pair of values in a data point,  
exit the data-point display, and then immediately return to the display for  
that data point, you may see different values than the ones you just entered.  
The values you entered may now be contained in a differently numbered  
data point in the same profile, if they were previously entered out of order  
by frequency.  
Increasing Profile Accuracy  
To increase the accuracy of a power-correction profile, you can add data  
points between the existing data points in the profile (if less than 10 data  
points are in use), thus bringing the data points closer together and  
shortening the straight-line segments. If all ten data points are in use,  
you can add data points by using two or more profiles for a single test  
configuration. If you do this, you must select the profile you need (from the  
Menu) for the range of frequencies being measured. This means that you  
must select a different profile whenever the measured frequency moves  
outside the range of frequencies defined by the data points in the  
currently selected profile.  
Power Correction Examples  
The procedures for using Power Correction and entering loss (or gain) and  
frequency values in power-correction profiles are demonstrated in the  
Power Correction examples on the following pages. The first example,  
on page 2-33, shows how to select a power-correction profile and enable  
Power Correction and also shows how to disable Power Correction.  
The second example, on page page 2-35, shows how to enter data in the  
power-correction profiles.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
Power Correction Example: Selecting a Correction Profile  
1
2
Press the Shift key, and then press the Menu (Reset/Local) key.  
Press either the up- or down-arrow key repeatedly until “PWR  
CORR > OFF” is displayed as shown below:  
3
4
Press the right-arrow key once.  
The flashing pointer in the Power Correction display changes direction  
to indicate that you can now use the up- and down-arrow keys to select a  
power-correction profile (or select OFF to disable Power Correction).  
The current setting for Power Correction (OFF or a number between 1  
and 9) also flashes.  
Press the up- and/or down-arrow key repeatedly until the number  
of the power-correction profile you want to use is displayed.  
For this example, choose profile number 3.  
If no data points were entered into the correction profiles previously,  
each of the nine power-correction profiles contains only two valid data  
points—0.0 dB loss at 1 GHz and 0.0 dB loss at the highest frequency the  
Counter can measure (20 GHz for the 53150A, 26.5 GHz for the 53151A,  
or 46 GHz for the 53152A). The remaining eight data points in each of the  
profiles initially contain values of 0.0 dB loss at 0.0 GHz. (This example  
assumes that valid loss and frequency values were previously entered in  
two or more of the data points in this profile.)  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
5
Press the Enter key to select profile number 3.  
Power Correction is enabled using profile number 3, and the measurement  
display returns. The power reading now includes an adjustment for the  
loss incurred at the measured frequency. The amount of the adjustment is  
derived from the loss and frequency values in the data points in the  
selected profile. A lower-case letter “c” is shown in the hundredths  
position of the power-measurement display to indicate that Power  
Correction is enabled.  
Ch  
2
Freq  
dBm  
Pwr  
NOTE  
Pressing the Enter key when the number of a power-correction profile  
(1-9) is displayed selects that profile, enables Power Correction, and exits  
the Menu. If you intend to enter data in the currently displayed profile,  
press the right-arrow key instead of the Enter key to select the  
power-correction profile without exiting the Menu.  
You can also select a power-correction profile by pressing the right- or  
left-arrow key (instead of the Enter key). When you press either arrow  
key, you do not exit the Menu. As the next example shows, you should  
select a profile with the right-arrow key when you intend to enter or  
change the loss and/or frequency values in the selected profile. You should  
select the power-correction profile with the left-arrow key if you are done  
working with the power-correction settings, but you want to change  
settings for other functions in the Menu.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
Power Correction Example: Editing Data Point Values  
1
Select a power-correction profile using the up- and/or  
down-arrow keys (as shown in steps 1 through 4 in the previous  
example). For this example, choose profile number 3.  
2
Press the right-arrow key.  
The display changes to show the loss and frequency values stored in the  
data point that contains the lowest frequency value in the current profile.  
The left and right pointers that are before and after the word “LOSS” are  
flashing.  
dB  
The ten small, single-line annunciators that are below the analog power  
display are used to indicate which of the ten data points is currently  
displayed. In the example shown above, only the first annunciator is  
activated, which indicates that the values displayed are for data point 1,  
the lowest data point.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
3
To insert values in an empty data point, press the up- and/or  
down-arrow key repeatedly to cycle through the data points in  
the selected profile to locate one that contains values of 0.0 for  
both loss and frequency.  
For a profile that has not been previously used, the first two data points  
displayed contain values of 00.0 dB loss at 1.0 GHz and 00.0 dB loss at the  
highest frequency the Counter can measure (20 GHz for the 53150A,  
26.5 GHz for the 53151A, or 46 GHz for the 53152A). The remaining data  
points contain values of 00.0 dB loss at 00.0 GHz. In profiles that have  
been previously used, all data points containing non-zero values are  
displayed in order from lowest to highest, and any zero-value data points  
are displayed above the non-zero data points. All data points are  
automatically sorted into order by frequency and saved whenever you  
select a different profile or exit the Power Correction menu.  
4
To change a value (or values) in a data point, press the up- and/or  
down-arrow key repeatedly until the data point that contains the  
value(s) you want to change is displayed, and then press the  
right-arrow key (the number of the data point displayed is  
indicated by the number of annunciators to the right of the  
loss value).  
The pointer to the left of the word “LOSS” stops flashing, the pointer to  
the right of the word “LOSS” changes direction and flashes, and the first  
digit of the frequency value flashes. This indicates that you can now  
adjust the value of the first digit in the frequency setting.  
dB  
5
To adjust the value of the tens position of the frequency setting,  
press the up- or down-arrow key until the desired value is  
displayed.  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
6
Use the right-arrow key to move to each of the remaining digits in  
the frequency setting, and use up- and down-arrow keys to adjust  
their values, if necessary.  
The currently selected digit flashes to indicate that it is the one that  
changes when you press the up- and down-arrow keys. You can also use  
the left-arrow key to back up to a previous digit, if necessary. However,  
be aware that the digit to the left of the one you are adjusting increments  
automatically to the next higher or lower value when the value of the  
currently selected digit exceeds nine or is incremented below zero.  
7
8
To adjust the loss value, press the right-arrow key while the digit  
in the tenths position of the frequency value and the pointer to  
the right of “GZ” are flashing.  
The pointer at the right end of the display changes direction, and the first  
digit (tens position) of the loss value flashes. You can now adjust its value  
using the up- and down-arrow keys.  
Use the left- and right-arrow keys to navigate to the remaining  
digits in the loss setting, and adjust their values (if necessary)  
with the up- and down-arrow keys.  
dB  
9
Press the Sign (+/–) key to change the sign of the loss value  
(if necessary).  
dB  
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Chapter 2 Operating Your Frequency Counter  
Using Power Correction  
10 To add or adjust the values in another data point, press the  
left-arrow key repeatedly until “PWR CORR” is re-displayed, and  
repeat steps 2 through 10. To edit data points within another  
power-correction profile, press the left-arrow key repeatedly until  
“PWR CORR” is re-displayed, and repeat steps 1 through 10.  
NOTE  
When a data point is entered in a profile, all of the data points in that  
profile are sorted by frequency and stored in that order. Therefore,  
the data points in a profile are always in order from the lowest frequency  
to the highest when you access a correction profile. The first data point  
displayed is always the data point that contains the lowest frequency value.  
11 If you are done entering data-point values, press the Enter key to  
accept your changes, save the data-point values, and return to the  
measurement display.  
Power Correction is now enabled using the profile number 3.  
Ch  
2
Freq  
dBm  
Pwr  
NOTE  
You can include your selection of a power-correction profile in any of the  
nine sets of user settings stored in non-volatile memory (see page 2-46) by  
enabling the profile and then saving the set. If you save set 0 (zero) while  
Power-Correction is enabled, the currently-selected profile will be in effect  
whenever you turn on the Counter.  
The data in the saved user settings and in all of the power-correction  
profiles is stored in non-volatile memory. If the Counter ever requires  
repair, and the main circuit-board assembly is replaced, these stored  
values will be lost. Therefore, to protect these values and ensure they are  
available for future use, you should keep an external record of them.  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
Using the Menu  
The Agilent 53150A/151A/152A Counter’s Menu makes it easy to control  
a number of the Counter’s features and functions. You use the Selection  
(arrow) keys to navigate to the setting you want to change and then to  
actually make the changes.  
1
Press the Shift key and then the Menu (Reset/Local) key to display the Menu.  
When you press the Shift key, the Shift annunciator (near the bottom-right  
corner of the display) activates. When you press the Menu (Reset/Local)  
key, the Shift annunciator goes off, and the first menu item is displayed.  
If you have not previously invoked the Menu since you last turned the  
Counter on, the first menu item is REF OSC, the Reference Oscillator.  
2
Press the right-arrow key to change the setting for the Reference  
Oscillator.  
The flashing annunciator ( ) in the display reverses direction to indicate  
that you can now change the setting by pressing either the up-arrow key  
or the down-arrow key. In the case of the Reference Oscillator function,  
which has only two possible settings (INTernal and EXTernal), pressing  
either the up- arrow or the down-arrow has the same effect (it toggles the  
setting from INT to EXT or from EXT to INT).  
NOTE  
The Counter will not switch to EXTernal unless a suitable reference  
signal is available at the External Reference connector.  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
3
Press the Enter key to activate the setting and exit the Menu.  
The setting you chose is put into effect, and the Menu closes.  
If you need to exit the Menu without changing any of the settings, press  
the Clear key. To restore the setting of any menu item to the setting that  
was in effect when you opened the Menu, press the Reset/Local key (this  
restores the original setting for the current menu item but does not close  
the Menu).  
The Menu contains the following items (these items are displayed in the  
order they are listed if you repeatedly press the up-arrow key after  
opening the Menu):  
•
REF OSC — Sets the Counter to use the internal timebase or an external  
timebase connected to the Reference connector on the back panel.  
•
•
DO SELF TEST — Starts the sequence of built-in tests.  
BATT VOLTAGE — Displays the current voltage level in the  
rechargeable battery packs (only if the Battery option is installed).  
•
•
•
OP HRS — Displays the total number of hours the Counter has been in  
operation since it was last calibrated.  
Model number, firmware version number, serial number, OPTNS  
(installed options).  
PRESET — Resets all user-settable functions to the factory default  
settings.  
•
•
BAUD — Sets the data rate for the RS-232 serial port.  
FM — Turns the Counter’s ability to compensate for frequency  
modulation on (AUTO) or OFF.  
•
•
CH1 LPF — Turns the Channel 1 Low-Pass Filter (approx. 50 KHz) ON  
or OFF.  
RECALL — Reads and implements a stored set of user settings from  
one of nine (0 – 9) that are stored in non-volatile memory.  
2-40  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
•
•
SAVE — Saves a copy of the current user settings in non-volatile  
memory. Nine sets (0 – 8) can be saved, and set 0 is automatically read  
on startup. To have the Counter automatically start up with your  
preferred settings, save these settings in set 0.  
PWR CORR — Activates (or deactivates) the Power Correction function  
and allows you to edit and select power-correction profiles. Power  
Correction is used to compensate for losses in the test configuration,  
such as attenuation resulting from cable impedance.  
Each of these menu items is described in more detail on the following pages.  
Navigating in the Menu and Changing Settings  
When you select the Menu (with the Shift and Menu [Reset/Local] keys),  
the indicator between the arrow keys flashes to indicate that the arrow  
keys are now active. Since the Reference Oscillator setting is the first one  
displayed when you invoke the Menu (unless you’ve used the Menu to  
change another setting since you turned the Counter on), you don’t have to  
use the up-arrow key or the down-arrow key to get to it.  
When you press the right-arrow key, the flashing annunciator ( ) changes  
direction, and the current setting for the Reference Oscillator INT  
(internal) or EXT (external) flashes. This indicates that you can now  
change this setting. Use either the up-arrow key or the down-arrow key to  
change the setting.  
If there are more than two settings available for the currently selected  
function, you can cycle through the available settings by repeatedly  
pressing either the up-arrow key or the down-arrow key. For example, to  
change the setting for the Baud rate for the serial port, invoke the Menu,  
and then repeatedly press the up-arrow or down-arrow key until BAUD is  
shown on the display. Then, press the right-arrow key to select the BAUD  
option, and press the up- or down-arrow repeatedly until the setting you  
want is displayed. Finally, press the Enter key to implement your choice.  
You navigate to and adjust the remaining settings available in the Menu  
in the same manner. Each time you modify a setting and press the Enter  
key, the Menu closes, so you have to reinvoke it each time to change  
additional settings.  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
Some of the menu items listed on the previous page provide information  
only (no settings are required [or possible] for these), such as Battery  
Voltage, Operation Hours, and information that identifies the Counter  
(Agilent model number, firmware version number, serial number, and  
installed option codes). These menu options are described in the  
remainder of this chapter and also in “The Front Panel Menus at a  
Glance” on page 1-4.  
NOTE  
Always terminate each setting you change in a menu option by pressing  
the Enter key. You can abort any change while the Menu is displayed by  
pressing the Reset/Local key or the Clear key. Both keys nullify the change  
you made to the current menu option, but they do not affect any of the  
other menu options. The Clear key terminates the current menu session,  
but the Reset/Local key does not.  
Reference Oscillator (REF OSC)  
By default, the Counter uses its internal 10 MHz reference oscillator  
(or the optional Oven Timebase, Option 001) as a timebase for all  
measurements, unless REF OSC is set to EXT, and it detects a 1, 2, 5, or  
10 MHz reference signal on the Reference connector on the back panel.  
If an external reference signal is present, you can force the Counter to use  
the internal reference oscillator by setting the REF OSC menu option  
to INT.  
The available settings are EXT (external) and INT (internal), and the  
default setting is INT.  
NOTE  
When REF OSC is set to internal (INT), the Counter outputs a 10 MHz,  
1 V p-p signal on the Reference connector on the back panel.  
2-42  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
Do Self Test  
The Counter automatically performs a series of tests on critical  
components each time you turn it on. If at any time during operation,  
you want to repeat these tests, you can do so by invoking the Menu,  
navigating to DO SELF TEST, and pressing the Enter key.  
The individual tests that comprise the Self Test, and the error messages  
that are displayed if problems are detected, are described in Appendix B,  
“Messages.”  
Battery Voltage (BATT VOLTAGE)  
If the Battery Option (Option 002) is installed, the current battery voltage  
is displayed in digital and analog form in this menu item, so you can  
estimate the remaining time that the Counter can operate from the  
batteries. The batteries are fully charged when the voltage reading is  
13.5 V, and the minimum battery voltage for proper operation is  
approximately 10 V. For additional information on the Battery Option,  
see Appendix C.  
Operating Hours (OP HOURS)  
This is an informational menu item that displays the total number of hours  
the Counter has been in operation since its last calibration. This value does  
not include Standby hours. This information is useful for scheduling  
routine maintenance and calibration. For additional information on  
maintenance and calibration, see the Agilent 53150A/151A/152A  
Assembly-Level Service Guide.  
Model Number, Firmware Version, Serial Number, and  
Option Codes  
This menu item displays a series of numbers and codes that are used to  
identify the Counter, its software version number, and the options that  
are installed. These items are displayed sequentially, and you use the left-  
and right-arrow keys to move between the information fields. Note that  
there are several numbers displayed in the field that contains the  
firmware version. These are in the following pattern:  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
VVV is the version number of the Counter’s firmware, and XX, YYY, and  
ZZZZ are other numerical codes that are reserved for Agilent internal use.  
The flashing annunciators at either end of the first line of the display  
indicate that you can use the equivalent arrow key to scroll left and/or  
right to the next field of information.  
The option-code display lists the code number for each of the installed  
options. For example, in a Counter that has the Battery and Oven  
Timebase options installed, the display would show: <OPTNS 1-2- - ->.  
2-44  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
Preset  
When PRESET is displayed, pressing the Enter key loads the default  
settings for most of the Counter’s functions. These functions and their  
default settings are listed in the following table:  
Table 2-1. Factory Default Function Settings  
Function  
Available Settings  
Default Setting  
Reference Oscillator  
(REF OSC)  
INT (Internal)  
EXT (External)  
INT (Internal)  
Frequency Modulation (FM) AUTO, OFF  
AUTO  
OFF  
Channel 1 Low-Pass Filter  
(CH1 LPF)  
OFF, ON  
Recall Settings (RECALL)  
Save Settings (SAVE)  
0 through 8  
0 through 8  
0
0
Measurement Rate  
FAST, MED,  
FAST  
(Rate key)  
SLOW, HOLD  
Averages (Avg key)  
01 through 99  
01  
Resolution  
(Resol key)  
1 Hz, 10 Hz, 100 Hz; 1KHz,  
10 KHz, 100 KHz, 1 MHz  
1 Hz  
Display Backlight On/Off  
On, Off  
On  
(
On/Off key)  
Channel Selection  
(Chan Select key)  
Channel 1, Channel 2  
Channel 2  
dBm  
Power Measurement Units  
dBm (dBm, dB)  
(dBm/W key)  
W (W, mW, µW)  
Frequency Offset  
Off, On  
Off  
(FREQ Offset On/Off key)  
(freq. limits depend on model) (0)  
Relative Frequency  
(Rel Freq key)  
Off, On  
Off, On  
Off  
Off  
Power Offset  
(POWER Offset On/Offkey) (-99.99 through +99.99 dBm) (0)  
Relative Power  
Off, On  
Off  
(Rel Pwr key)  
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Chapter 2 Operating Your Frequency Counter  
Using the Menu  
RS-232 Serial Port Data Rate (BAUD)  
The Baud rate for the RS-232 serial port is configurable at 2400, 4800,  
9600, 14,400, and 19,200 bps. The default setting is 9600 bps.  
Frequency Modulation (FM)  
The Counter can measure signals that are modulated in frequency, such as  
a microwave radio carrier. When FM is set to AUTO (the default setting),  
the Counter automatically detects FM signals and modifies its  
measurement algorithm accordingly. Since this increases the time it takes  
to compute each measurement, you can turn this feature OFF to increase  
measurement speed, or leave it set to AUTO to increase accuracy when  
measuring FM signals.  
Channel 1 Low-Pass Filter (CH1 LPF)  
The Counter has a built-in 50 KHz low-pass filter that can be enabled  
from the Menu to eliminate measurement distortions that result from  
noise in low-frequency signals. When the low-pass filter is enabled,  
signals above 50 KHz cannot be measured on Channel 1.  
Recall User Settings (RECALL)  
Up to nine sets of settings you make for the Counter’s configurable  
functions can be saved in non-volatile memory. The RECALL menu option  
allows you to select and implement any of the sets you have previously  
saved. The settings in set zero are automatically loaded on power-up.  
The Save and Recall functions enable faster and easier operation, reduce  
operator errors, and reduce training requirements.  
Save User Settings (SAVE)  
The SAVE menu option allows you to save the Counter’s current settings  
for configurable functions in non-volatile memory for use at a later time.  
Nine sets of settings can be saved. The Save and Recall functions enable  
faster and easier operation, reduce operator errors, and reduce training  
requirements.  
Power Correction (PWR CORR)  
Used to compensate for losses in the test configuration. See page 2-30.  
2-46  
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3
Specifications  
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Chapter 3 Specifications  
Introduction  
Introduction  
The specifications of the Agilent 53150A, 53151A, and 53152A are  
provided in this chapter.  
3-2  
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Chapter 3 Specifications  
Measurement Specifications and Characteristics  
All measurement specifications are over the full signal and temperature  
ranges unless otherwise noted.  
Input Characteristics  
Agilent 53150A  
Agilent 53151A  
Agilent 53152A  
Frequency Range  
Channel 1 (Normal mode)  
10 Hz–125 MHz  
10 Hz–50 kHz  
50 MHz–20 GHz  
10 Hz–125 MHz  
10 Hz–50 kHz  
50 MHz–26.5 GHz  
10 Hz–125 MHz  
10 Hz–50 kHz  
50 MHz–46 GHz  
(Low pass filter enabled)  
Channel 2  
Sensitivity  
Channel 1  
10–30 Hz  
30 Hz–125 MHz  
Channel 2  
40 mV rms  
25 mV rms  
40 mV rms  
25 mV rms  
40 mV rms  
25 mV rms  
−20 dBm  
−33 dBm  
−33 dBm  
−29 dBm  
N/A  
−20 dBm  
−33 dBm  
−33 dBm  
−29 dBm  
−25 dBm  
N/A  
−20 dBm  
−33 dBm  
−30 dBm  
−27 dBm  
−27 dBm  
−23 dBm  
−17 dBm  
50–300 MHz  
0.3–12.4 GHz  
12.4–18 GHz  
18–20 GHz  
20–26.5 GHz  
26.5–40 GHz  
40–46 GHz  
N/A  
N/A  
N/A  
Maximum Input  
Channel 1  
Channel 2  
2 V  
rms  
2 V  
rms  
2 V  
rms  
+5 dBm  
+13 dBm  
+5 dBm  
+13 dBm  
+5 dBm  
+13 dBm  
50 MHz–2 GHz  
2–46 GHz  
Damage Level  
Channel 1  
120 V (dc + ac pk) linearly derated  
to 5 V at 125 MHz  
120 V (dc + ac pk) linearly derated 120 V (dc + ac pk) linearly derated to  
to 5 V at 125 MHz  
rms  
+27 dBm  
5 V at 125 MHz  
rms  
+27 dBm  
rms  
+27 dBm  
Channel 2  
Impedance (Nominal)  
Channel 1  
Channel 2  
1 MΩ/ 60 pF  
50 Ω  
1 MΩ/ 60 pF  
50 Ω  
1 MΩ/ 60 pf  
50 Ω  
Connector  
Channel 1  
Channel 2  
BNC female  
SMA/APC-3.5  
compatible female  
BNC female  
SMA/APC-3.5  
compatible female  
BNC female  
2.92 mm removable,  
SMA/APC-3.5 compatible female  
SWR - Channel 2  
50–300 MHz  
0.25–10 GHz  
10–20 GHz  
1.5:1 typical  
2.0:1 typical  
3.0:1 typical  
N/A  
1.5:1 typical  
2.0:1 typical  
3.0:1 typical  
3.0:1 typical  
N/A  
1.5:1 typical  
2.0:1 typical  
3.0:1 typical  
2.5:1 typical  
2.5:1 typical  
20–26.5 GHz  
26.5–46 GHz  
N/A  
Coupling  
Channel 1  
Channel 2  
ac  
ac  
ac  
ac  
ac  
ac  
Acquisition Time (1 MHz FM rate)  
Channel 1  
Channel 2 (FM Auto/FM Off)  
N/A  
125 ms/100 ms  
N/A  
125 ms/100 ms  
N/A  
140 ms/115 ms  
Resolution Selection  
Channel 1/Channel 2  
1 Hz to 1 MHz  
1 Hz to 1 MHz  
1 Hz to 1 MHz  
Coupling  
Channel 1  
Channel 2  
ac  
ac  
ac  
ac  
ac  
ac  
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Chapter 3 Specifications  
Input Characteristics  
Agilent 53150A  
Agilent 53151A  
Agilent 53152A  
Emissions (“kickback noise”)  
Channel 1  
Channel 2 (measuring/no input)  
N/A  
−40 dBm/<−70 dBm  
N/A  
−40 dBm/<−70 dBm  
N/A  
−40 dBm/<−70 dBm  
Residual Stability*  
Channel 1  
Channel 2  
N/A  
0.6 LSD rms  
N/A  
0.8 LSD rms  
N/A  
1.25 LSD rms  
*Counter and source tied to same timebase  
Accuracy  
Channel 1/Channel 2  
1 LSD residual stability  
timebase error x frequency  
1 LSD residual stability  
timebase error x frequency  
1 LSD residual stability  
timebase error x frequency  
Measurement Time  
Channel 1  
1/Resolution + 20 ms  
1/Resolution + 20 ms  
1/Resolution + 20 ms  
1/Resolution +  
Acquisition time + 20 ms  
1/Resolution +  
Acquisition time + 20 ms  
1/Resolution +  
Acquisition time + 20 ms  
Channel 2  
FM Tolerance  
Channel 1  
Channel 2 (FM Auto)  
N/A  
20 MHz p-p max  
@ 10 MHz rate  
N/A  
20 MHz p-p max  
@ 10 MHz rate  
N/A  
20 MHz p-p max to 26.5 GHz,  
12 MHz p-p max above  
26.5 GHz @ 10 MHz rate  
1 MHz p-p @ 10 MHz rate  
1 MHz p-p @ 10 MHz rate  
1 MHz p-p @ 10 MHz rate  
(FM Off)  
AM Tolerance  
Channel 1, Channel 2  
Any index provided minimum  
signal level is not less  
than sensitivity  
Any index provided minimum  
signal level is not less  
than sensitivity  
Any index provided minimum  
signal level is not less  
than sensitivity  
Amplitude Discrimination  
Channel 1  
Channel 2  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
below 300 MHz  
above 300 MHz  
Automatically measures the largest Automatically measures the largest Automatically measures the largest  
signal present provided signal is  
>10 dB (typical) above any signal  
separated by less than 75 MHz;  
>20 dB (typical) above any signal  
separated by more than 75 MHz  
signal present provided signal is  
>10 dB (typical) above any signal  
separated by less than 75 MHz;  
>20 dB (typical) above any signal  
separated by more than 75 MHz  
signal present provided signal is  
>10 dB (typical) above any signal  
separated by less than 75 MHz;  
>20 dB (typical) above any signal  
separated by more than 75 MHz  
Power Measurement  
Channel 1  
Channel 2  
N/A  
N/A  
N/A  
Range  
Counter sensitivity to +7 dBm  
Counter sensitivity to +7 dBm  
Counter sensitivity to +7 dBm  
Accuracy at input connector**  
(0 dBm to −20 dBm)  
0.05–12.4 GHz  
12.4–20 GHz  
20–26.5 GHz  
26.5–46 GHz  
1.5 dB  
1.5 dB  
N/A  
1.5 dB  
1.5 dB  
2.0 dB  
1.0 dB  
1.5 dB  
1.5 dB  
2.0 dB  
N/A  
0.01 dB  
dBm or milliwatts/microwatts  
N/A  
0.01 dB  
dBm or milliwatts/microwatts  
Resolution  
Display  
**see graphs for typical data  
0.01 dB  
dBm or milliwatts/microwatts  
3-4  
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Chapter 3 Specifications  
Typical* power measurement uncertainty at 25°C for various  
input levels  
Graph 1.  
−10 dBm input  
level at 25°C.  
Graph 2.  
0 dBm and  
−20 dBm input  
* Typical means approximately 2/3 of all units will meet these characteristics.  
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Chapter 3 Specifications  
Typical* power measurement uncertainty at −25 dBm  
input level  
Graph 3.  
−25 dBm input  
level at 25°C.  
Graph 4.  
−25 dBm input  
level from  
* Typical means approximately 2/3 of all units will meet these characteristics.  
3-6  
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Chapter 3 Specifications  
Power Supply  
Timebase  
ac: 90–132 Vac; 47.5–66 Hz or 360–440 Hz  
216–264 Vac; 47.5–66 Hz  
line selection: automatic  
power requirements: 75 VA max. (25 W typ.)  
dc: (Option 002 only): 11–18 Vdc; 2A max.  
Battery (Option 002):  
Type: VHS camcorder, lead acid (2 each)  
Charge Time: 8 hours in unit  
Frequency: 10 MHz  
Output: 10 MHz sine wave, 1 Vrms into 50 Ω  
External Timebase Input: 1, 2, 5, 10 MHz;  
1 to 5 Vrms into 50 Ω  
Connector: BNC female located on rear panel  
Internal Timebase Stability  
TCXO  
(Standard)  
Oven  
(Option 001)  
Capacity: 2.5 hours min. at 25°C  
Math Functions:  
Aging Rate  
Per Day  
Per Month  
−10  
—
<1 x10  
<5 x 10  
<1.5 x 10  
−7  
−8  
Offset: Last reading and/or entered offset to  
reading for either power or frequency  
Averaging: 1 to 99 measurement running  
average  
Cable Loss Compensation: Offsets power  
reading via linear interpolation of user-entered  
attenuations with up to 9 independent frequency  
points.  
Short Term  
(1 sec. avg. time)  
−9  
−10  
<1 x 10  
<2 x 10  
Line Variation  
( 10%)  
−7  
−10  
<1 x 10  
<1 x 10  
−8  
—
<1 x10  
within 5 min. after  
turn-on at 25°C  
Warm-up  
Temperature  
Stability (0–55°C)  
−6  
−8  
<1 x 10  
<1 x 10  
Display: Backlit LCD. Backlight can be turned on  
or off via front panel control.  
Sleep Mode (Option 002 only): Automatically  
activated if no input is present for 5 minutes.  
Safety: Designed in compliance with IEC-1010,  
CAN/CSA 1010.1  
General Information  
Save and Recall: Up to 9 complete instrument  
setups may be saved and later recalled. These  
setups are retained when power is removed.  
Sample Rate: User-selectable Fast (nominally  
20 ms between readings), Medium (nominally  
250 ms between readings), Slow (nominally 1 s  
between readings) and Hold.  
Self Test: Internal memory and count circuitry  
automatically tested at startup, via menu  
selection, or remotely. Error messages displayed  
to indicate failed tests.  
EMC: Designed in compliance with IEC-11,  
EN50082-1, IEC801-2, -3, -4  
Accessories Supplied  
Operating, programming, and service manuals  
and ac power cord.  
Accessories Available  
Size: 213 mm W x 88.5 mm H x 300 mm D  
Operating temperature: 0–55°C  
With battery option: 0–40°C  
Spare Battery  
53150-80010  
dc Power Input Cable 53150-60214  
Weight: 4 kg without battery option, 6.4 kg with  
battery option  
Warranty: 1 year  
Options  
Opt 001 Oven Timebase  
Opt 002 Battery and dc input  
Opt 1BP Mil-Std-45662A Calibration with data  
Opt W30 Three Years of Return Repair Service  
Opt W50 Five Years of Return Repair Service  
Opt 1CM Rack Mount Kit  
Programming: GPIB (IEEE-488.1-1987,  
IEEE 488.2-1987) or RS-232C  
Language: SCPI-1992.0 (Standard Commands  
for Programmable Instruments)  
RS-232C Rates: User-selectable 2400 to  
19200 baud  
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3-8  
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A
Rack Mounting the Counter  
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Appendix A Rack Mounting the Counter  
Rack Mounting the Counter  
Rack Mounting the Counter  
You can mount the Counter in a standard 19-inch cabinet using one of two  
optional kits available from Agilent:  
•
Option 1CM Rack Mount Kit (Agilent 53150-67001 Rack Adapter Kit)  
for single instrument (Half Module) rack mounting. Instructions and  
mounting hardware are included with the rack-mounting kit.  
•
Agilent 5061-9694 Lock Link Kit for two-instrument, side-by-side rack  
mounting. Instructions and mounting hardware are included with the  
rack-mounting kit. (Two Option 1CM Rack Mount Kits are also  
required when mounting two instruments.)  
To rack-mount the Counter, you must first remove the front and rear  
rubber bumpers, the carrying handle, and the handle pivots:  
NOTE  
Unlike the hardware used elsewhere in this instrument, all hardware  
used to attach the rack mounts and the handle pivots is metric.  
1
Rotate the handle to its vertical position, pull the ends outward, and set  
it aside.  
2
To remove the rubber bumpers, lift the center of the top of the bumper  
upward, stretch a corner of the bumper diagonally, then slide it off the end  
of the Counter.  
A-2  
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Appendix A Rack Mounting the Counter  
Rack Mounting the Counter  
OPTIONS  
3
To rack-mount the Counter by itself, perform the steps shown in the  
following illustration. (Refer to the instructions that are provided with the  
Rack Adapter Kit for details.)  
4
3
2
1
2
1 Rack Flange  
2 Handle Pivot  
3 Agilent 53150A/151A/152A Counter  
4 Panel Filler (Adapter) Assembly  
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Appendix A Rack Mounting the Counter  
Rack Mounting the Counter  
4
To rack-mount the Counter with another instrument side-by-side, obtain  
the 5061-9694 Lock Link Kit. (Refer to the instructions that are provided  
with the Lock Link Kit for details.)  
2
5
1
4
3
2
3
1 Lock Links  
2 Rack Flange  
3 Handle Pivot  
4 Agilent 53150A/151A/152A Counter  
5 Second Agilent 53150A/151A/152A  
Counter or other half-rack-size instrument  
A-4  
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B
Messages  
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Appendix B Messages  
Overview  
Overview  
The Agilent 53150A/151A/152A provides two types of messages that are  
displayed on the Counter’s front panel and/or sent over the RS-232 serial  
interface. The first type is status messages, which are displayed during  
normal operation. The second type is error messages, which are sent via  
RS-232 and/or displayed when the Counter detects an error during the  
Self-Test procedure or during normal operation.  
NOTE  
All messages sent over the RS-232 interface are also available via GPIB.  
However, these messages are not automatically sent over the GPIB  
interface. For information on retrieving messages over the GPIB interface,  
see the Agilent 53150A/151A/152A Programming Guide.  
Status Messages  
Table 3-1 lists and describes the status messages that are displayed on  
the Counter’s front panel.  
Table 3-1. Status Messages  
Message  
Description  
TESTING  
The Counter is performing its Self-Test.  
No critical errors were detected during the self-test.  
The Counter is sampling the signal and computing a measurement.  
SELF TEST OK  
MEASURING  
AVERAGING  
The Counter is taking measurements and computing the number of  
averages determined by the Averages setting.  
CH 1 NO SIGNAL The Counter is operational, but no signal can be detected on the  
CH 2 NO SIGNAL selected input channel.  
CHANNEL 1  
CHANNEL 2  
Identifies the currently selected channel after you press the Chan  
Select key to switch channels. CHANNEL 1 or CHANNEL 2 is  
displayed until the Counter can display a measurement or determine  
that no signal is present.  
B-2  
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Appendix B Messages  
Self-Test Messages  
Self-Test Messages  
Table 3-2 lists and describes messages that are generated by the Counter  
during Self-Test to indicate whether a component passed or failed its test.  
These messages are sent via the RS-232 serial output only—they do not  
appear on the Counter’s front-panel display.  
Table 3-2. Self-Test Messages  
Message  
Description  
ROM TEST FAIL  
ROM TEST OK  
ROM failed read test.  
ROM passed read test.  
RAM DATA LINES OK  
RAM DATA ERROR  
RAM ADDR LINES OK  
RAM ADDR ERROR  
RAM TEST OK  
RAM data lines passed test.  
RAM data lines failed test.  
RAM address lines passed test.  
RAM address lines failed test.  
RAM tests completed with no errors detected.  
EEPROM FAIL - CONFIGURATION  
DATA  
The configuration data saved in EEPROM  
memory is defective.  
ROM FAIL; Computed checkbyte does The checksum of the ROM data does not match  
not match the value stored in  
EEPROM.  
the value stored in EEPROM.  
EEPROM FAIL - CONFIGURATION  
DATA; Needs to be (re)initialized.  
The EEPROM org code does not verify with  
current revision of ROM code.  
EEPROM FAIL - POWER CAL DATA;  
Using default data  
The checksum of the EEPROM power-  
calibration table is bad. Factory default  
calibration data will be used.  
EEPROM FAIL - SAVED SETTINGS;  
Using default data  
The checksum of the user settings stored in  
EEPROM is bad. Factory default settings will be  
used.  
EEPROM FAIL - SAVED SETTINGS;  
Invalid EEPROM SAV n Data.  
The checksum of one set of user settings (1 – 9)  
stored in EEPROM is bad.  
GPIB FAIL; Conf. Test  
The GP-IB hardware failed its confidence test.  
Operating Guide  
B-3  
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Appendix B Messages  
Error Messages  
Error Messages  
Table 3-3 lists and describes messages that are generated by the Counter  
during Self-Test or during operation to indicate that a problem has been  
detected. These messages are displayed on the Counter’s front-panel  
display and are also sent via the RS-232 serial output (note that, in many  
cases, the exact message text that is displayed on the front panel is a  
condensed form of the message that is sent via RS-232).  
Table 3-3. Error Messages  
Message  
Display RS-232 Description  
12V FAIL  
X
X
X
X
X
X
X
The +12 VDC output from the power  
supply is not within specifications.  
–12V FAIL  
–5V FAIL  
The –12 VDC output from the power  
supply is not within specifications.  
The –5 VDC output from the power  
supply is not within specifications.  
ADC FAIL  
X
X
A failure was detected in the ADC.  
B1 SIGNAL PATH FAIL  
PATH FAIL  
A failure was detected in the Channel 1  
signal path.  
X
X
X
B1 THRESHOLD FAIL  
THRS FAIL  
X
X
X
A failure was detected in the Channel 1  
threshold circuit.  
B2 RF THRESHOLD FAIL  
THRS FAIL  
A failure was detected in the Channel 2  
RF threshold circuit.  
B2 THROUGH-PATH  
THRESHOLD FAIL  
A failure was detected in the Channel 2  
through-path threshold circuit.  
THRS THRU  
X
B2 HETERODYNE PATH  
THRESHOLD FAIL  
X
X
A failure was detected in the Channel 2  
heterodyne-path threshold circuit.  
THRS HET  
X
X
EEPROM FAIL - WRITE  
EEP WRT FAIL  
A failure was detected while writing to  
EEPROM.  
B-4  
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Appendix B Messages  
Error Messages  
Table B-3. Error Messages (continued)  
Message  
Display RS-232 Description  
FRONT PANEL FAIL  
FPANEL FAIL  
X
The front panel or its interconnecting  
cable are defective or not properly  
connected.  
X
X
FPGA FAIL  
GPIB FAIL  
X
X
X
A failure was detected in the FPGA  
(Field Programmable Gate Array).  
X
A failure was detected in the GPIB  
hardware.  
HETERODYNE PATH  
FAIL  
A failure was detected in the  
heterodyne-path circuit.  
HET PATH FAIL  
IIC FAIL  
X
X
X
X
X
An attempt to write to the LCD display  
failed.  
INSTCFG FAIL  
X
The instrument’s configuration data is  
missing or has become corrupted.  
OVER TEMPERATURE  
OVERTEMP  
The Counter’s internal temperature is  
above the acceptable limit.  
X
X
PWR CAL FAIL  
X
X
The instrument’s power-calibration data  
is missing or has become corrupted.  
POWER METER FAIL  
PWR CKT FAIL  
RAM FAIL  
A failure was detected in the Channel 2  
power-measurement circuit.  
X
X
X
X
X
X
X
A failure was detected in RAM.  
A failure was detected in ROM.  
ROM FAIL  
SAV SET FAIL  
One or more of the sets of user settings  
is missing or has become corrupted.  
SERVICE FAIL  
X
X
X
The instrument’s service data is missing  
or has become corrupted.  
THRU PATH FAIL  
THRU FAIL  
A failure was detected in the  
through-path circuit of Channel 2.  
X
X
VCO/COUNT CHAIN FAIL  
VCO/CNT FAIL  
X
A failure was detected in the VCO or the  
Count Chain.  
Operating Guide  
B-5  
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Appendix B Messages  
Error Messages  
B-6  
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C
Using the Battery Option  
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Appendix C Using the Battery Option  
Overview  
Overview  
The Battery option (Option 002) allows you to operate the Counter away  
from a source of AC power using internal rechargeable batteries or the  
external DC (EXT DC) power connector on the rear panel. You can charge  
the batteries inside the Counter when you are not using it, if an AC power  
source is available. (To charge the batteries inside the Counter, it must be  
in Standby mode.) You can also charge the batteries outside the Counter  
using an AC or suitable DC power source and the optional External  
Charger (Agilent P/N 53150-60217).  
Operating the Counter from the Batteries  
When the Counter is powered from the internal batteries, it operates in  
the same manner as it does when it is powered from an external AC or DC  
source, except that the cooling fan does not operate, and the Main AC  
Power On LED is not lit. Whenever a battery-equipped Counter is on  
(not in Standby), the battery annunciator in the lower-right corner of the  
front-panel display (see Figure C-1) indicates the approximate charge  
level remaining in the batteries. This allows you to estimate the amount of  
time you can continue to operate from battery power before recharging the  
batteries or replacing them with fully charged batteries.  
Battery Charge Indicator  
Figure C-1. Battery Charge Level Indicator  
C-2  
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Appendix C Using the Battery Option  
Operating the Counter from a DC Power Source  
When all three segments of the battery annunciator are activated, the  
battery charge level is at 83% or more. When only two segments are  
activated, the charge level is approximately 50%, and when only the first  
segment is activated, the charge level is approximately 17%.  
A pair of fully charged batteries in good condition provides enough power  
to operate the Counter for approximately three hours at 25º C. Various  
conditions, such as ambient temperature and the measurement configuration,  
can affect the length of time the Counter can operate from a fully charged  
set of batteries.  
A battery that reads approximately 13.6 VDC when measured with a  
voltmeter (or the Battery Voltage reading in the menu display) is fully  
charged. A battery that reads 11 VDC or less is at or near the minimum  
effective charge level.  
NOTE  
Operating the Counter with the display backlight turned off lengthens the  
time the Counter can operate from the batteries. When operating from  
battery power, the Counter automatically turns the backlight off after five  
minutes if no front-panel keys are pushed, no GPIB commands are  
received, and/or no signal is applied to either input during that period.  
Operating the Counter from a  
DC Power Source  
Counters that have the Battery option can operate from an external DC  
power source (with or without batteries in the Counter). The external DC  
power source must supply +11 to +18 VDC at 2.0 A (min.). It must use a  
2.1 mm coaxial plug, and its DC output plug must be wired so the inner  
connector is positive and the outer connector is negative. To use an  
external DC power source, make sure the Main ~ Power switch on the back  
panel is set to 1 (on), insert the coaxial plug into the EXT DC socket on  
the back panel as shown in Figure C-2, and turn the Counter on in the  
normal manner.  
Operating Guide  
C-3  
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Appendix C Using the Battery Option  
Replacing the Batteries  
Made in U.S.A.  
with domestic and foreign content  
ISM 1-A  
OPTIONS  
001 Oven Time Base  
002 Battery  
Main ~ Power  
Reference 10 MHz  
Auxillary  
WARNING:  
In  
To avold electric shock,  
do not remove covers.  
No user-serviceable parts inside.  
or  
Out  
Refer all servicing to qualified personnel.  
This unit must be earth grounded.  
11 TO 18 VDC  
EXT DC  
AC POWER  
100 – 130 VAC, 50/60/400 Hz 75 VA  
220 – 240 VAC, 50/60 Hz 75 VA  
FUSE  
1.0 A T  
250 V  
RS-232  
Main AC Power Indicator  
External DC Input Connector  
Figure C-2. External DC Power Socket  
Replacing the Batteries  
Counters equipped with the Battery option use sealed lead-acid VHS  
camcorder batteries. You can obtain additional batteries of this type from  
Agilent (Agilent P/N 53150-80010) and from other suppliers who carry  
test equipment and/or video camera accessories.  
Removing the Batteries  
To remove the batteries, use the following procedure:  
1
2
Turn off the Counter, and disconnect all external cables (including the  
power cord).  
Turn the two thumb screws that secure the battery sled to the Counter’s  
back panel counterclockwise until both thumb screws are completely out  
of the threaded holes in the back panel (see Figure C-3).  
C-4  
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Appendix C Using the Battery Option  
Replacing the Batteries  
NOTE  
The thumbscrews require a considerable amount of turning force, since  
they pull the battery sled partially out of the Counter and also extract the  
battery terminals from the battery connector as you turn them. To prevent  
the battery sled from binding and increasing the force necessary to turn  
the thumbscrews, either turn both thumbscrews simultaneously, or  
alternately turn the thumbscrews one-half turn each, until both  
thumbscrews are fully out of the threaded holes in the back panel.  
3
4
Slide the battery sled out the back of the Counter.  
CAUTION  
Avoid placing the battery sled and/or the batteries where the battery  
terminals could contact any conductive surfaces.  
Lift the terminal end of either or both batteries up out of the battery sled,  
and then pull the battery(ies) out of the sled.  
Installing Batteries  
To install batteries in the Counter, use the following procedure:  
1
2
If you have not previously removed the battery sled from the Counter and  
the batteries from the sled, do so now (see “Removing the Batteries” on the  
previous page).  
Position the battery sled so that the back (taller) end is to your left as  
shown in Figure C-3  
Operating Guide  
C-5  
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Appendix C Using the Battery Option  
Replacing the Batteries  
3
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5
1 Thumbscrews  
2 Batteries  
4 Battery chamber  
5 Battery sled  
3 Battery terminals  
Figure C-3. Removing and Installing Batteries  
C-6  
Operating Guide  
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Appendix C Using the Battery Option  
Replacing the Batteries  
3
Holding one of the batteries so the battery terminals are to your right and  
the plus sign at the terminal end is facing away from you, insert the  
left-hand end of the battery into the taller end of the battery sled with the  
far side of the battery against the far side of the sled. Lower the right end  
of the battery into the sled, and push down on the battery until it is down  
as far as it can go. Insert the second battery next to the first one in the  
same manner.  
NOTE  
The batteries fit snugly into the sled, so it is important to keep them  
aligned with the sides of the sled. If you attempt to insert a battery, and it  
is not parallel with the sides of the sled, it will bind.  
4
5
When both batteries are fully inserted in the sled, insert the sled into the  
battery-chamber opening in the Counter’s back panel (terminal end first).  
Slide the sled into the battery chamber until you can start the thumb-  
screws into the threaded holes in the Counter’s back panel (turn the  
thumbscrews clockwise). You may have to push against the back end of  
the battery sled to insert it far enough for the thumb screws to contact the  
back panel.  
6
Tighten the two thumb screws on the battery sled until both thumbscrews  
are fully hand tight and the back cover of the battery sled is flush against  
the Counter’s back panel.  
NOTE  
The thumbscrews require a considerable amount of turning force, since  
they push the battery sled into the Counter and also insert the battery  
terminals into the battery connectors as you turn them. To prevent the  
battery sled or the terminals from binding or jamming, either turn both  
thumbscrews simultaneously, or alternately turn the thumbscrews  
one-half turn each, until the battery sled is fully inserted.  
Operating Guide  
C-7  
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Appendix C Using the Battery Option  
Charging the Batteries  
Charging the Batteries  
The batteries are charged automatically whenever the instrument is  
connected to an AC power source and is in Standby mode. The amount of  
time required to fully charge the batteries is dependent on several factors,  
including the current charge level, the condition of the batteries, the  
ambient temperature, and the power source used for charging. In general,  
it takes approximately eight hours to charge two batteries inside the  
instrument.  
The Agilent part numbers for the batteries are provided in the section  
titled “Accessories Supplied and Available” on page xiv.  
C-8  
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Appendix C Using the Battery Option  
Precautions  
Precautions  
Observe the following precautions when handling and charging the  
batteries:  
•
Do not attempt to use or charge the batteries when they are exposed to  
temperatures below –10º C (15º F) or above 40º C (105º F). (Most  
batteries of this type have an internal safety device that prevents  
them from operating outside of this temperature range.)  
•
Charge the batteries only with a charger intended for this type of  
battery or inside the Counter.  
•
•
•
•
Do not allow the battery terminals to contact any conductive surfaces.  
Avoid discharging the batteries completely.  
Recharge the batteries as soon as possible after use.  
Handle the batteries carefully to avoid internal damage and/or  
damage to the casings. Do not drop or throw the batteries or otherwise  
expose them to strong physical shock.  
•
Do not incinerate the batteries or subject them to extremely high  
temperatures.  
Operating Guide  
C-9  
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Appendix C Using the Battery Option  
Precautions  
C-10  
Operating Guide  
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Index  
AVERAGING, 2-18, 2-19, B-2  
Avg, 2-4  
Avg key, 2-10, 2-17, 2-45  
Avg On, 1-5, 2-18  
SYMBOLS  
(Freq Offset), 1-20  
(Resol key), 2-45  
A
B
AC Input/Power module, 1-7  
Accessories  
backlight, 1-11  
BATT VOLTAGE, 2-40  
batteries, 2-43, C-4  
battery annunciator, C-2  
battery chamber, C-7  
Battery compartment, 1-7  
Battery Option, 2-43  
Battery compartment, 1-7  
battery voltage, 2-43  
battery voltage level, 2-40  
Battery option, 1-3, 1-5, 1-18, 2-40, C-2-4  
BATT VOLTAGE, 2-40  
batteries, C-4  
Available, xiv  
Supplied, xiv  
Acknowledging Messages, 2-9  
analog, 1-5  
analog power display, 2-24  
analog representation, 2-24  
Annunciators, 1-5  
Analog power display, 1-5  
Avg On, 1-5  
Battery charge, 1-5  
Battery charge-level indicator, 1-5  
Ch1, 1-5  
Ch2, 1-5  
dB, dBm, W, mW, uW, %, 1-5  
Error, 1-5  
Ext Ref, 1-5  
Freq, 1-5  
Freq Offset, 1-5  
Hold, 1-5  
battery chamber, C-7  
battery charge-level annunciator, C-2  
Battery charge-level indicator, 1-5  
battery sled, C-4, C-5  
Battery Voltage, 1-14  
conserving battery power, 1-11  
cooling fan, C-2  
DC input connector, C-3  
DC power connector, C-2  
display backlight, 1-11  
EXT DC power-input connector, 1-7  
EXT DC socket, C-3  
Pwr, 1-5  
Pwr Offset, 1-5  
Rel Freq, 1-5  
Rel Pwr, 1-5  
Rmt, SRQ, 1-5  
External Charger, C-2  
external DC power connector, C-2  
external DC power source, C-3  
full charge, C-3  
Shift, 1-5  
arrow keys, 2-5  
AUTO, 2-7, 2-46  
Auxiliary connector, 1-7  
average, 2-17  
installing batteries, C-5  
Average / Power Offset key, 1-2  
Averages (Avg key), 2-45  
Averages Setting Example, 2-17  
averages-setting mode, 2-17, 2-18  
Operating Guide  
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Index  
operating the Counter from a DC  
power source, C-3  
Connector  
External Reference, 2-4  
operating the Counter from the  
batteries, C-2  
rechargeable batteries, C-2  
removing the batteries, C-4  
replacing the batteries, C-4  
battery sled, C-4, C-5  
Battery Voltage, 1-14, 2-41, C-3  
Battery Voltage (BATT VOLTAGE), 2-43  
battery voltage level, 2-40  
BAUD, 2-7, 2-40, 2-41  
cooling fan, C-2  
D
data points, 2-30, 2-33  
data rate, 2-40  
dB, dBm, 1-5, 2-24  
dBm/W key, 2-25, 2-45  
DC output plug, C-3  
DC power connector, C-2  
DC power source, C-2, C-3  
dedicated keys, 2-7  
Default Function Settings, 2-45  
default settings, 2-45  
Description of the Counter, xii  
difference, 2-20, 2-26  
Baud rate, 1-14, 2-4, 2-41, 2-46  
C
cable impedance, 2-30  
calibration, 2-43  
Ch 1 annunciator, 2-13  
CH 1 NO SIGNAL, B-2  
Ch 2 annunciator, 2-12  
CH 2 NO SIGNAL, B-2  
CH1 LPF, 2-7, 2-40, 2-45  
CH1 NO SIGNAL, 1-18, 2-13  
CH2 NO SIGNAL, 1-18, 2-12  
Chan Select key, 1-16, 2-4, 2-10, 2-45  
Changing States, 2-7  
CHANNEL 1, 2-13, B-2  
Channel 1 input connector, 1-2  
Channel 1 Low-Pass Filter, 2-7, 2-45  
Channel 1 Low-Pass Filter (CH1  
LPF), 2-45, 2-46  
difference in frequency, 2-21  
Display  
left pointer, 1-6  
Menu, 1-6  
right pointer, 1-6  
Special characters, 1-6  
Display backlight, 2-10  
Display Backlight On/Off, 2-45  
display backlight On/Off key, 2-10  
Display Power / dBm/W key, 1-2  
Display Power key, 2-4, 2-10, 2-24, 2-27  
Display Resolution, 2-10  
Display Special Characters, 1-6  
Displaying the Menu, 1-12  
DO SELF TEST, 2-40  
Do Self Test, 1-14, 2-43  
drift, 1-24, 2-4, 2-10, 2-20  
CHANNEL 2, B-2  
Channel 2, 1-18, 1-22, 2-12, 2-24, 2-27  
connector, 1-18  
Channel 2 input connector, 1-2  
Channel Select, 2-45  
Channel selection, 2-10  
Channel Selection (Chan Select key), 2-45  
Channel Selection key, 1-2  
charge level, C-2  
Clear / Backlight On/Off key, 1-2  
Clear key, 1-14, 2-9, 2-40  
Index-2  
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Index  
E
F
Electro-Static Discharge, 1-17  
electro-static discharge prevention  
procedure, 1-17  
factory default settings, 2-40, 2-45  
fan, 1-3  
FAST, 2-7, 2-16  
Enter key, 1-2, 1-14, 2-5  
Error, 1-5  
Error Messages, B-4  
–12V FAIL, B-4  
firmware, 2-44  
Firmware Version, 2-43  
firmware version number, 1-14, 2-12,  
2-40, 2-42  
12V FAIL, B-4  
–5V FAIL, B-4  
ADC FAIL, B-4  
EEP WRT FAIL, B-4  
FPANEL FAIL, B-5  
FPGA FAIL, B-5  
GPIB FAIL, B-5  
HET PATH FAIL, B-5  
IIC FAIL, B-5  
flash rate, 1-3, 2-14, 2-15  
flashing annunciator, 2-5  
FM, 2-7, 2-40, 2-45, 2-46  
FM signals, 2-46  
Freq, 1-5  
Freq annunciator, 2-12, 2-13  
Freq Offset, 1-5, 1-20, 2-4, 2-21  
Freq Offset annunciator, 2-21, 2-23  
Freq Offset key, 2-21  
INSTCFG FAIL, B-5  
OVERTEMP, B-5  
PATH FAIL, B-4  
PWR CAL FAIL, B-5  
PWR CKT FAIL, B-5  
RAM FAIL, B-5  
SAV SET FAIL, B-5  
SERVICE FAIL, B-5  
THRS FAIL, B-4  
FREQ Offset On/Off key, 2-10, 2-45  
Frequency, measuring, 1-17  
frequency difference, 2-20  
frequency drift, 2-20  
Frequency Modulation, 2-7, 2-45  
frequency modulation, 2-40  
Frequency Modulation (FM), 2-45, 2-46  
Frequency Offset, 1-20, 2-21  
Frequency Offset (FREQ Offset On/Off  
key), 2-45  
THRS HET, B-4  
THRS THRU, B-4  
THRU FAIL, B-5  
Frequency Offset Example, 2-21  
Frequency Offset function, 2-21  
Frequency offset measurement, 2-10  
frequency value, 2-30  
frequency-offset display, 2-22  
Front Panel  
VCO/CNT FAIL, B-5  
error messages, 2-43  
ESD, 1-17  
EXT, 2-7, 2-39, 2-41, 2-42  
EXT DC power-input connector, 1-7  
EXT DC socket, C-3  
Ext Ref, 1-5  
Annunciators, 1-5  
arrow keys, 2-5  
Average / Power Offset key, 1-2  
Avg key, 2-4, 2-10  
EXTernal, 2-39  
External Charger, C-2  
external DC power connector, C-2  
external DC power source, C-3  
External Reference connector, 1-7, 1-12  
external reference signal, 2-4, 2-42  
external timebase, 2-40  
Chan Select key, 2-4, 2-10  
Channel 1 input connector, 1-2  
Channel 2 input connector, 1-2  
Channel Selection key, 1-2  
Clear / Backlight On/Off key, 1-2  
Clear key, 2-9  
Operating Guide  
Index-3  
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Index  
Display Power / dBm/W key, 1-2  
Display Power key, 2-4, 2-10  
Enter key, 1-2  
G
Gate indicator, 1-2, 2-14, 2-15, 2-16  
Gate LED Indicator  
flash rate, 1-3  
measurement rate, 1-3  
Gate LED indicator, 1-3  
Gater LED Indicator  
measurement resolution, 1-3  
GP-IB, 2-4  
Freq Offset key, 2-4  
FREQ Offset On/Off key, 2-10  
Gate indicator, 1-2  
Gate LED indicator, 1-3  
GPIB key, 2-10  
LCD display, 1-2  
Menu key, 2-4  
GP-IB address, 2-12  
GP-IB Interface connector, 1-7  
GPIB key, 2-10  
Menus at a Glance, 1-4  
Offset On/Off / Relative Frequency  
key, 1-2  
Offset On/Off / Relative Power  
key, 1-2  
Offset On/Off keys, 2-4  
POWER Offset On/Off key, 2-10  
Power/Standby switch, 1-2  
Pwr Offset key, 2-4  
GZ, 2-37  
H
HI, 1-23  
HOLD, 2-7, 2-16, 2-19  
Hold, 1-5  
How this Counter Works for You, 2-3  
Rate / Frequency Offset key, 1-2  
Rate key, 2-4, 2-10  
Rel Freq key, 2-10  
I
icons, 1-9  
Input Channel  
Rel Pwr key, 2-11  
Chan Select key, 1-16  
selecting, 1-16  
Reset/Local / Menu key, 1-2  
Reset/Local key, 2-9  
Resol key, 2-4, 2-10  
Resolution / GPIB key, 1-2  
Selection (arrow) keys, 1-2  
Selection keys, 2-5  
installed option codes, 2-42  
Installing Batteries, C-5  
INT, 2-7, 2-39, 2-41  
INTernal, 2-39  
internal 10 MHz ref oscillator, 2-4, 2-42  
internal timebase, 2-4, 2-40  
Selection keys active indicator, 1-2  
Shift key, 1-2  
Sign (+/–) key, 1-2  
Sign key, 2-5  
Standby indicator, 1-2, 1-3  
Front panel  
Rel Freq key, 1-19  
Rel Pwr key, 1-24  
Front Panel at a Glance, 1-2  
front-panel keys, 2-10  
full charge, C-3  
fully charged, C-3  
Function Selection Keys, 2-10  
Fuse Holder, 1-7  
Index-4  
Operating Guide  
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Index  
serial number, 1-14  
using, 1-12  
menu, 1-12, 1-13  
Menu (Reset/Local) key, 1-12, 2-5  
menu function, 2-5  
Menu key, 2-4, 2-39, 2-41  
menu options, 2-42  
L
LCD display, 1-2, 1-11  
backlight, 1-11  
LED Display  
Annunciator, 1-5  
left pointer, 1-6  
Legend  
messages, B-2  
icons, 1-9  
minimum battery voltage, 2-43  
minimum effective charge, C-3  
Model Number, 2-43  
Model number, 2-40  
LO, 1-23  
Lock Link Kit, A-2  
LOSS, 2-36  
loss value, 2-30  
Low-Pass Filter, 2-40, 2-45  
low-pass filter, 2-46  
model number, 1-14, 2-12, 2-42  
N
Navigating in the Menu and Changing  
Settings, 1-12, 2-41  
M
Main Power On indicator, 1-7  
Main Power switch, 1-7  
main power switch, 1-10  
Manuals, supplied, xiv  
noise, 2-46  
non-volatile memory, 2-30, 2-40, 2-46  
Number of Averages, 2-10  
number of averages, 2-17, 2-18  
Numeric Entry, 2-6  
numeric entry, 2-5  
numeric values, 2-5  
maximum power specification, 1-17  
measurement algorithm, 2-46  
Measurement Rate, 2-7, 2-10, 2-45  
measurement rate, 1-3, 2-16  
Measurement Rate (Rate key), 2-45  
measurement resolution, 1-3  
Measurement Sequence, 2-4  
MEASURING, 2-16, B-2  
Measuring Frequency, 1-17, 2-12  
Measuring Power, 1-22, 2-24  
Measuring Relative Frequency, 1-19, 2-20  
Measuring Relative Power, 1-24, 2-26  
MED, 2-7, 2-16  
O
OFF, 2-7  
offset function, 2-23  
Offset On/Off / Power key, 1-2  
Offset On/Off / Relative Frequency  
key, 1-2  
Offset On/Off key, 2-10, 2-23, 2-29  
Offset On/Off keys, 2-4  
offset value, 1-25, 2-21, 2-22, 2-28  
offset-entry, 2-22  
Offsetting a Frequency  
Measurement, 1-20, 2-21  
Offsetting a Power Measurement, 1-24,  
2-27  
ON, 2-7  
On/Off (Clear) key, 1-11  
On/Off key, 2-45  
Operating Hours (OP HOURS), 2-43  
operating modes, 2-5  
Menu, 1-6, 1-14, 2-4, 2-39, 2-40, 2-41  
Battery Voltage, 1-14  
changing settings, 1-12  
displaying, 1-12  
Do Self Test, 1-14  
firmware version number, 1-14  
model number, 1-14  
navigating, 1-12  
Operation Hours, 1-14  
option codes, 1-14  
Preset, 1-14  
Operating Guide  
Index-5  
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Index  
Operating the Counter from a DC  
Power Source, C-3  
measuring power, 2-24  
Option Codes, 2-43  
Operating the Counter from the  
Batteries, C-2  
Operation  
option codes, 1-14, 2-42  
optional Oven Timebase, 2-4, 2-42  
Options, xiii  
acknowledging messages, 2-9  
changing states, 2-7  
Battery, 1-3  
Hardware, xiii  
displaying the Menu, 1-12  
function selection keys, 2-10  
measuring frequency, 1-17, 2-12  
measuring power, 1-22  
measuring relative frequency, 2-20  
measuring relative power, 1-24, 2-26  
measuring relative frequency, 1-19  
navigating in the Menu, 1-12  
navigating in the menu and  
changing settings, 2-41  
Oven Timebase, 2-4, 2-42  
Support, xiii  
OPTNS, 2-40  
Other Function Selection Keys, 2-10  
Oven Timebase, 2-4, 2-42  
P
peaking, 2-24  
percentage, 2-24, 2-26  
Planar Crown, 1-18  
Power Correction  
numeric entry, 2-6  
offsetting a frequency  
cable impedance, 2-30  
data points, 2-30, 2-33  
disabling, 2-33  
enabling, 2-33  
frequency, 2-33  
frequency value, 2-30  
GZ, 2-37  
interpolation, 2-30  
LOSS, 2-36  
loss, 2-33  
measurement, 1-20, 2-21  
offsetting a power measurement, 1-24,  
2-27  
operating the Counter from the  
batteries, C-2  
other function selection keys, 2-10  
selecting the input channel, 1-16  
selecting the unit of measurement  
for power, 1-23  
sequencing through the Menu, 2-5  
setting the measurement rate, 1-32,  
2-16  
loss value, 2-30  
lower-case letter "c", 2-34  
profiles, 2-30  
PWR CORR > OFF, 2-33  
selecting a correction profile, 2-33  
Power Correction Example  
Selecting a Correction Profile, 2-33  
Power Correction examples, 2-32  
Power Correction function, 2-30  
power difference, 2-26  
power loss, 2-30  
Power measurement, 1-5  
power measurement, 2-24  
Power Measurement Example, 2-24  
Power Measurement Units (dBm/W  
key), 2-45  
setting the number of averages, 2-17  
setting the resolution, 2-14  
setting the resolution and the  
measurement rate, 2-14  
Turning the Counter On, 1-10  
using Power Correction, 2-30  
using the Clear and Reset/Local  
keys, 2-9  
using the Menu, 1-12, 2-39  
using the selection keys, 2-5  
Operation Hours, 1-14, 2-42  
Operation  
Index-6  
Operating Guide  
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Index  
Power Offset, 1-24, 1-25, 2-45  
Power Offset (POWER Offset On/Off  
key), 2-45  
Main Power On indicator, 1-7  
Main Power switch, 1-7  
RJ12 connector, 1-7  
Power Offset Example, 2-27  
Power Offset function, 1-24, 2-27  
Power offset measurement, 2-10  
POWER Offset On/Off key, 2-10, 2-45  
Power switch, 1-10  
Power/Standby switch, 1-2  
power-correction profiles, 2-30  
power-measurement function, 2-10  
power-on self-test, 2-12  
precision, 2-14, 2-17  
RS-232 Interface connector, 1-7  
Rear Panel at a Glance, 1-7  
RECALL, 2-40, 2-45, 2-46  
Recall Settings, 2-45  
Recall Settings (RECALL), 2-45  
Recall User Settings (RECALL), 2-46  
rechargeable batteries, C-2  
rechargeable battery packs, 2-40  
REF OSC, 2-7, 2-39, 2-40, 2-42, 2-45  
Reference connector, 2-40, 2-42  
Reference Oscillator, 1-11, 1-12, 1-13,  
1-14, 2-4, 2-7, 2-39, 2-41, 2-42, 2-45  
Reference Oscillator (REF OSC), 2-45  
Reference Oscillator function, 2-39  
Rel Freq, 1-5  
PRESET, 2-40, 2-45  
Preset, 1-14, 2-45  
Pwr, 1-5  
Pwr annunciator, 2-24  
PWR CORR, 2-38  
PWR CORR> OFF, 2-33  
Pwr Offset, 1-5, 2-4, 2-27  
Pwr Offset annunciator, 2-28, 2-29  
Pwr Offset key, 2-28  
Rel Freq (Offset On/Off) key, 1-19, 2-10  
Rel Freq annunciator, 2-20  
Rel Freq key, 1-19, 2-10, 2-20, 2-45  
Rel Pwr, 1-5  
Rel Pwr (Offset On/Off) key, 1-24  
Rel Pwr (Offset On/Off) keys, 1-24  
Rel Pwr annunciator, 2-26  
Q
Quick Reference Guide, xv  
Rel Pwr key, 1-24, 2-11, 2-26, 2-45  
Related Documents, ix  
Relative Frequency, 2-45  
R
Rack Mount Kit, A-2  
Rack Mounting the Counter, A-2  
Rate, 1-19, 2-4  
rate, 2-14  
Rate / Frequency Offset key, 1-2  
Rate key, 2-7, 2-10, 2-16, 2-45  
Rate setting, 2-14  
Rate Setting Example, 2-16  
rate-setting mode, 2-16  
Rear Panel, 1-7  
Relative Frequency (Rel Freq key), 2-45  
Relative Frequency function, 2-20  
Relative Power, 1-24, 2-45  
Relative Power (Rel Pwr key), 2-45  
Relative Power Example, 2-26  
Relative Power function, 2-26  
Relative power measurement, 2-11  
Removing the Batteries, C-4  
repackaging, xi  
Replacing the Batteries, C-4  
Reset/Local / Menu key, 1-2  
Reset/Local key, 1-14, 2-4, 2-9, 2-16, 2-19  
Resol, 2-4  
Resol key, 2-7, 2-10, 2-15, 2-45  
Resolution, 1-19, 2-7, 2-10  
AC Input/Power module, 1-7  
Auxiliary connector, 1-7  
Battery compartment, 1-7  
EXT DC power-input connector, 1-7  
External Reference connector, 1-7  
Fuse Holder, 1-7  
GP-IB Interface connector, 1-7  
Operating Guide  
Index-7  
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Index  
resolution, 2-14  
Service  
Repackaging for Shipment, xi  
Resolution (Resol) key, 2-45  
Resolution / GPIB key, 1-2  
Resolution setting, 2-14  
resolution setting, 2-14, 2-15, 2-16  
Resolution Setting Example, 2-15  
right pointer, 1-6  
Setting the Measurement Rate, 1-32, 2-16  
Setting the Number of Averages, 2-17  
Setting the Resolution, 2-14  
Setting the Resolution and the  
Measurement Rate, 2-14  
Shift, 1-5  
RJ12, 1-7  
Rmt, 1-5  
routine maintenance, 2-43  
RS-232, 2-40, B-3  
Shift annunciator, 2-21  
Shift key, 1-2, 2-5  
side-by-side rack mounting, A-2  
Sign (+/–) key, 1-2, 2-5, 2-28  
Sign key, 2-8  
RS-232 Interface  
Baud rate, 1-14  
RS-232 Interface connector, 1-7  
RS-232 serial port, 2-46  
RS-232 Serial Port Data Rate  
(BAUD), 2-46  
signal quality, 2-14, 2-16  
SLOW, 2-7, 2-16  
Special characters, 1-6  
Specifications  
maximum power, Channel 2, 1-17  
SRQ, 1-5  
Standby, 1-3  
Standby indicator, 1-2, 1-3  
Standby mode, 1-3, 1-11, C-2  
state change, 2-5  
Status Messages, B-2  
Summary of the Measurement  
Sequence, 2-4  
S
SAVE, 2-40, 2-45, 2-46  
Save and Recall functions, 2-46  
Save Settings, 2-45  
Save Settings (SAVE), 2-45  
Save User Settings (SAVE), 2-46  
Selecting a Correction Profile, 2-33  
Selecting the Input Channel, 1-16  
Selecting the Unit of Measurement for  
Power, 1-23  
Selection (arrow) keys, 1-2, 1-12  
Selection keys, 2-5, 2-8  
Selection keys active indicator, 1-2  
Self Test, 2-43  
T
test configuration, 2-30  
TESTING, 2-12, B-2  
tests, 1-14, 2-43  
timebase, 1-3  
SELF TEST OK, 2-12, B-2  
Self-Test, B-3  
Turning the Counter On, 1-10  
Self-Test Messages, B-3  
Sequencing Through the Menu, 2-5  
serial interface, 2-4  
Serial Number, 2-43  
serial number, 1-14, 2-40, 2-42  
serial port, 2-4, 2-40  
Serial Port Baud Rate, 2-7  
Index-8  
Operating Guide  
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Index  
U
Unit of Measurement, 1-23  
units of measurement annunciator  
group, 2-25  
user setting, 2-40  
Using Power Correction, 2-30  
Using the Clear and Reset/Local  
Keys, 2-9  
Using the Menu, 2-39  
Using the Selection Keys, 2-5  
V
version number, 2-44  
W
W, mW, uW, 1-5, 2-24  
Operating Guide  
Index-9  
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Index  
Index-10  
Operating Guide  
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Service and Support  
Contacting Agilent Technologies:  
For more information about Agilent test and measurement products, applications, and services, visit our web site  
at http://www.agilent.com/services/English/index.html.  
Agilent’s Test and Measurement Fax Service for United States and Canada:  
Technical information for test and measurement products and services is available 24 hours a day, 7 days a week, by  
calling 1-800-800-5281.  
Technical Support:  
If you need technical assistance with an Agilent test and measurement product or application, you can find a list of local  
service representatives on the web site listed above. If you do not have access to the Internet, one of the following centers  
can direct you to your nearest representative:  
Asia Pacific:  
Japan:  
Hong Kong, SAR  
Measurement Assistance Center  
Tokyo, Japan  
Tel: (852) 2599-7777  
Fax: (852) 2506-9284  
Tel: 81-426-56-7832  
Fax: 81-426-56-7843  
Australia/New Zealand:  
Blackburn, Victoria, Australia  
Latin America:  
Latin America Region Headquarters  
Miami, FL, U.S.A.  
Tel: 1-800-629-485 (Australia)  
Tel: 0-800-738-378 (New Zealand)  
Fax: (61-3) 9272-0749  
Tel: (305) 267-4245  
Fax: (305) 267-4288  
Canada:  
Mississauga, ON, Canada  
United States:  
Test & Measurement Call Center  
Englewood, CO, U.S.A.  
Tel: 877-894-4414  
Fax: (905) 206-4700  
Tel: (800) 452-4844  
Fax: (303) 662-3726  
Europe:  
European Marketing Organisation  
The Netherlands  
Tel: +31 20 547 9999  
Fax: +31 20 547 7799  
Printed in U.S.A  
Data subject to change  
Rev 07/01  
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Continued from front matter. . .  
Warranty (cont’d)  
Agilent will be liable for damage Safety Considerations  
For continued protection  
against fire, replace the line  
fuse(s) with fuses of the same  
current rating and type (for  
example, normal blow, time  
delay). Do not use repaired  
fuses or short-circuited  
fuseholders.  
to tangible property per incident  
up to the greater of $300,000 or  
the actual amount paid for the  
product that is the subject of the  
claim, and for damages for  
bodily injury or death, to the  
extent that all such damages  
are determined by a court of  
competent jurisdiction to have  
been directly caused by a  
(cont’d)  
Agilent does not warrant that  
the operation of Agilent  
WARNING  
INSTRUCTIONS FOR  
products will be uninterrupted  
or error free. If Agilent is  
unable, within a reasonable  
time, to repair or replace any  
product to a condition as  
warranted, customer will be  
entitled to a refund of the  
purchase price upon prompt  
return of the product.  
ADJUSTMENTS WHILE  
COVERS ARE REMOVED  
AND FOR SERVICING ARE  
FOR USE BY SERVICE-  
TRAINED PERSONNEL  
ONLY. TO AVOID  
Acoustic Noise Emissions  
defective Agilent product.  
LpA<47 dB at operator position,  
at normal operation, tested per  
EN 27779. All data are the  
results from type test.  
DANGEROUS ELECTRIC  
SHOCK, DO NOT PERFORM  
SUCH ADJUSTMENTS OR  
SERVICING UNLESS  
TO THE EXTENT ALLOWED  
BY LOCAL LAW, THE  
Agilent products may contain  
remanufactured parts  
REMEDIES IN THIS  
equivalent to new in  
WARRANTY STATEMENT  
ARE CUSTOMER’S SOLE AND  
EXCLUSIVE REMEDIES.  
EXCEPT AS INDICATED  
ABOVE, IN NO EVENT WILL  
AGILENT OR ITS SUPPLIERS  
BE LIABLE FOR LOSS OF  
DATA OR FOR DIRECT,  
SPECIAL, INCIDENTAL,  
CONSEQUENTIAL  
(INCLUDING LOST PROFIT  
OR DATA), OR OTHER  
DAMAGE, WHETHER BASED  
IN CONTRACT, TORT, OR  
OTHERWISE.  
QUALIFIED TO DO SO.  
Geräuschemission  
performance or may have been  
subjected to incidental use.  
LpA<47 dB am Arbeits  
platz, normaler Betrieb, geprüft  
nach EN 27779.  
Die Angagen beruhen auf  
Ergebnissen von  
Typenprüfungen.  
WARNING  
The warranty period begins on  
the date of delivery or on the  
date of installation if installed  
by Agilent. If customer  
schedules or delays Agilent  
installation more than 30 days  
after delivery, warranty begins  
on the 31st day from delivery.  
ANY INTERRUPTION OF THE  
PROTECTIVE GROUNDING  
CONDUCTOR (INSIDE OR  
OUTSIDE THE PRODUCT’S  
CIRCUITRY) OR  
DISCONNECTING THE  
PROTECTIVE EARTH  
TERMINAL WILL CAUSE A  
POTENTIAL SHOCK  
Electrostatic Discharge  
Immunity Testing  
When the product is tested with  
8kV AD, 4kV CD and 4kV ID  
according to IEC801-2, a system  
error may occur that may affect  
measurement data made during  
these disturbances. After these  
occurrences, the system self-  
recovers without user  
Warranty does not apply to  
defects resulting from  
HAZARD THAT COULD  
RESULT IN PERSONAL  
INJURY. (GROUNDING ONE  
CONDUCTOR OF A TWO  
CONDUCTOR OUTLET IS  
NOT SUFFICIENT  
(a) improper or inadequate  
maintenance or calibration,  
(b) software, interfacing, parts  
or supplies not supplied by  
Agilent, (c) unauthorized  
modification or misuse,  
For consumer transactions  
in Australia and New  
Zealand: the warranty terms  
contained in this statement,  
except to the extent lawfully  
permitted, do not exclude,  
restrict or modify and are in  
addition to the mandatory  
statutory rights applicable  
to the sale of this product to  
you.  
intervention.  
PROTECTION.)  
(d) operation outside of the  
published environmental  
specifications for the product, or  
(e) improper site preparation or  
maintenance.  
Whenever it is likely that the  
protection has been impaired,  
the instrument must be made  
inoperative and be secured  
against any unintended  
operation.  
TO THE EXTENT ALLOWED  
BY LOCAL LAW, THE ABOVE  
WARRANTIES ARE  
Assistance  
Product maintenance  
If this instrument is to be  
energized via an  
autotransformer (for voltage  
reduction), make sure the  
common terminal is connected  
to the earthed pole terminal  
(neutral) of the power source.  
EXCLUSIVE AND NO OTHER  
WARRANTY OR CONDITION,  
WHETHER WRITTEN OR  
ORAL, IS EXPRESSED OR  
IMPLIED AND AGILENT  
SPECIFICALLY DISCLAIMS  
ANY IMPLIED WARRANTIES  
OR CONDITIONS OF  
agreements and other customer  
assistance agreements are  
available for Agilent products.  
For any assistance, contact your  
nearest Agilent Sales and  
Service Office.  
MERCHANTABILITY,  
Instructions for adjustments  
while covers are removed and  
for servicing are for use by  
trained personnel only. To avoid  
dangerous electric shock, do not  
perform such adjustments or  
servicing unless qualified to do so.  
SATISFACTORY QUALITY,  
AND FITNESS FOR A  
PARTICULAR PURPOSE.  
7.C.NL.07.31.00.R1.M.CW6FC  
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DECLARATION OF CONFORMITY  
According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014  
Manufacturer’s Name:  
Agilent Technologies, Inc.  
Manufacturer’s Address: 5301 Stevens Creek Blvd  
Santa Clara, California 95051  
U.S.A.  
Declares, that the product  
Product Name:  
Model Number:  
Product Options:  
CW Microwave Frequency Counter  
53150A, 53151A, and 53152A  
This declaration covers all options of the above product.  
Conforms with the following European Directives:  
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the  
EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.  
Conforms with the following product standards:  
EMC  
Standard  
Limit  
[1]  
IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998  
CISPR 11:1990 / EN 55011:1991  
Group 1 Class A  
4kV CD, 8kV AD  
IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995  
IEC 61000-4-3:1995 / EN 61000-4-3:1995  
IEC 61000-4-4:1995 / EN 61000-4-4:1995  
IEC 61000-4-5:1995 / EN 61000-4-5:1995  
IEC 61000-4-6:1996 / EN 61000-4-6:1996  
IEC 61000-4-11:1994 / EN 61000-4-11:1994  
3 V/m, 80-1000 MHz  
0.5kV signal lines, 1kV power lines  
0.5 kV line-line, 1 kV line-ground  
3V, 0.15-80 MHz I cycle, 100%  
Canada: ICES-001:1998  
Australia/New Zealand: AS/NZS 2064.1  
[1]  
The product was tested in a typical configuration with Agilent Technologies test systems.  
IEC 61010-1:1990+A1:1992+A2:1995 / EN 61010-1:1993+A2:1995  
Canada: CSA C22.2 No. 1010.1:1992  
Safety  
July 31, 2001  
Date  
Art Nanawa  
Product Regulations Manager  
For further information, please contact your local Agilent Technologies sales office, agent or distributor.  
Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D 71034 Böblingen, Germany SA  
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