HP Hewlett Packard Welder 53A User Manual

Contents

HP E1351A/53A FET Multiplexer User’s Manual

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Reader Comment Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Chapter 1.Getting Started with the HP E1351A/53A . . . . . . . . . . . . . . . . . . . . . 11

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

FET Multiplexer Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Multimeter Connection Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Analog Bus Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Tree Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Direct Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Switchbox and Scanning Voltmeter Configurations . . . . . . . . . . . . . . . . . . . 14

Switchbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Scanning Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Digital Bus and Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Programming Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 2.Configuring the HP E1351A/53A FET Multiplexer Modules . . . . . . . . . . 17

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Multiplexer Card Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Setting the Address Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Selecting the Interrupt Line Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Setting the Card ID Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Connecting User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Adding Signal Conditioning Components/Current Shunts . . . . . . . . . . . . . . . . 23

Connecting Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Wiring a Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Connecting Multimeters and Signal Generators . . . . . . . . . . . . . . . . . . . . . 26

Analog Bus and Digital Bus Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chapter 3.Using the HP E1351A/53A FET Multiplexer Modules . . . . . . . . . . . . . . 29

Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Selecting Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Connecting Switchbox Channels to Direct Terminals . . . . . . . . . . . . . . . . . . 32

Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Connecting Switchbox Channels to Tree Terminals for Making Measurements . . . . . 34

Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . . . . . . . . . . . 36

Downloading a Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Scanning a Switchbox without a Downloaded Scan List . . . . . . . . . . . . . . . . . 40

Scanning a Switchbox with a Downloaded Scan List . . . . . . . . . . . . . . . . . . . 41

Scanning Voltmeter Configuration with HP E1326B . . . . . . . . . . . . . . . . . . . 42

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:CPON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

:CTYPe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

:ERRor? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

TRIGger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

[:IMMediate] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

:SOURce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

:SOURce? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

IEEE 488.2 Common Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Command Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Appendix A.HP E1351A/53A FET Multiplexer Specifications . . . . . . . . . . . . . . . . 79

Appendix B.HP E1351A/53A Register-Based Programming . . . . . . . . . . . . . . . . . 81

About This Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

The Base Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

A16 Address Space Outside the Command Module or Mainframe . . . . . . . . . 83

A16 Address Space Inside the Command Module or Mainframe . . . . . . . . . . 83

WRITE Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

READ Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Manufacturer ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Device Type Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Status/Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Scan Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Scan Channel Delay Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Scan Channel Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . 89

Direct Channel Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . 89

Direct Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Executing Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Multimeter Command and Parameter Opcodes . . . . . . . . . . . . . . . . . . . 96

Multimeter Register-Based Programming Error Codes . . . . . . . . . . . . . . . 98

Appendix C.HP E1351A/53A FET Multiplexer Error Messages . . . . . . . . . . . . . . . 99

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Notes

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Certification

Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-

Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Tech-

nology (formerly National Bureau of Standards), to the extent allowed by that organization’s calibration facility, and to the calibration

facilities of other International Standards Organization members.

Warranty

This Hewlett-Packard product is warranted against defects in materials and workmanship for a period of three years from date of ship-

ment. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of)

other HP products. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which

prove to be defective.

For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard (HP). Buyer shall pre-

pay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping

charges, duties, and taxes for products returned to HP from another country.

HP warrants that its software and firmware designated by HP for use with a product will execute its programming instructions when

properly installed on that product. HP does not warrant that the operation of the product, or software, or firmware will be uninterrupted

or error free.

Limitation Of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied prod-

ucts or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or im-

proper site preparation or maintenance.

The design and implementation of any circuit on this product is the sole responsibility of the Buyer. HP does not warrant the Buyer’s

circuitry or malfunctions of HP products that result from the Buyer’s circuitry. In addition, HP does not warrant any damage that oc-

curs as a result of the Buyer’s circuit or any defects that result from Buyer-supplied products.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Exclusive Remedies

THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE

FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CON-

TRACT, TORT, OR ANY OTHER LEGAL THEORY.

Notice

The information contained in this document is subject to change without notice. HEWLETT-PACKARD (HP) MAKES NO WAR-

RANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-

RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. HP shall not be liable for errors contained

herein or for incidental or consequential damages in connection with the furnishing, performance or use of this material. This docu-

ment contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photo-

copied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company. HP assumes no

responsibility for the use or reliability of its software on equipment that is not furnished by HP.

Restricted Rights Legend

Use, duplication or disclosure by the U.S. Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in

Technical Data and Computer Software clause in DFARS 252.227-7013.

Hewlett-Packard Company

3000 Hanover Street

Palo Alto, California 94304 U.S.A.

Rights for non-DOD U.S. Government Departments and Agencies are as set forth in FAR 52.227-19 (c) (1,2).

HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual

Edition 4

HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual

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Documentation History

All Editions and Updates of this manual and their creation date are listed below. The first Edition of the manual is Edition 1. The Edi-

tion number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages

to correct or add additional information to the current Edition of the manual. Whenever a new Edition is created, it will contain all of

the Update information for the previous Edition. Each new Edition or Update also includes a revised copy of this documentation his-

tory page.

Edition 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . August 1990

Edition 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . September 1993

Edition 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . August 1994

Edition 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . July 1995

Safety Symbols

Instruction manual symbol affixed to prod-

Alternating current (AC).

Direct current (DC).

uct. Indicates that the user must refer to the

manual for specific WARNING or CAU-

TION information to avoid personal injury

or damage to the product.

Indicates hazardous voltages.

Indicates the field wiring terminal that must

be connected to earth ground before operat-

ing the equipment—protects against electri-

cal shock in case of fault.

Calls attention to a procedure, practice, or

condition that could cause bodily injury or

death.

WARNING

CAUTION

Calls attention to a procedure, practice, or con-

dition that could possibly cause damage to

equipment or permanent loss of data.

Frame or chassis ground terminal—typi-

cally connects to the equipment’s metal

frame.

WARNINGS

The following general safety precautions must be observed during all phases of operation, service, and repair of this product.

Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design,

manufacture, and intended use of the product. Hewlett-Packard Company assumes no liability for the customer’s failure to

comply with these requirements.

Ground the equipment: For Safety Class 1 equipment (equipment having a protective earth terminal), an uninterruptible safety earth

ground must be provided from the mains power source to the product input wiring terminals or supplied power cable.

DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes.

For continued protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type.

DO NOT use repaired fuses or short-circuited fuse holders.

Keep away from live circuits: Operating personnel must not remove equipment covers or shields. Procedures involving the removal

of covers or shields are for use by service-trained personnel only. Under certain conditions, dangerous voltages may exist even with the

equipment switched off. To avoid dangerous electrical shock, DO NOT perform procedures involving cover or shield removal unless

you are qualified to do so.

DO NOT operate damaged equipment: Whenever it is possible that the safety protection features built into this product have been im-

paired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until

safe operation can be verified by service-trained personnel. If necessary, return the product to a Hewlett-Packard Sales and Service Of-

fice for service and repair to ensure that safety features are maintained.

DO NOT service or adjust alone: Do not attempt internal service or adjustment unless another person, capable of rendering first aid

and resuscitation, is present.

DO NOT substitute parts or modify equipment: Because of the danger of introducing additional hazards, do not install substitute

parts or perform any unauthorized modification to the product. Return the product to a Hewlett-Packard Sales and Service Office for

service and repair to ensure that safety features are maintained.

HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual

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Declaration of Conformity

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name:

Hewlett-Packard Company

Loveland Manufacturing Center

Manufacturer’s Address:

815 14th Street S.W.

Loveland, Colorado 80537

declares, that the product:

Product Name:

Model Number:

Product Options:

16-Channel FET Multiplexer Modules

E1351A, E1353A

All

conforms to the following Product Specifications:

Safety:

IEC 1010-1 (1990) Incl. Amend 1 (1992)/EN61010-1 (1993)

CSA C22.2 #1010.1 (1992)

UL 1244

EMC:

CISPR 11:1990/EN55011 (1991): Group1 Class A

IEC 801-2:1991/EN50082-1 (1992): 4kVCD, 8kVAD

IEC 801-3:1984/EN50082-1 (1992): 3 V/m

IEC 801-4:1988/EN50082-1 (1992): 1kV Power Line

Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive

73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.

Tested in a typical configuration in an HP B-Size VXI mainframe.

July 20, 1995

Jim White, QA Manager

European contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department

HQ-TRE, Herrenberger Straße 130, D-71034 Böblingen, Germany (FAX +49-7031-14-3143).

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Notes

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HP E1351A/53A 16-Channel FET Multiplexer Module User’s Manual

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Chapter 1

Getting Started with the HP E1351A/53A

Using This Chapter

This chapter describes the HP E1351A 16-Channel FET and the

HP E1353A 16-Channel Thermocouple FET Multiplexer Modules, and

shows how to program the modules using SCPI (Standard Commands for

Programmable Instruments) commands. This chapter contains the

following sections:

• FET Multiplexer Module Description . . . . . . . . . . . . . . . . . . Page 11

• Multimeter Connection Points. . . . . . . . . . . . . . . . . . . . . . . . Page 12

• Switchbox & Scanning Voltmeter Configurations . . . . . . . . Page 14

• Digital Bus and Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

• Programming Language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

• Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

FET Multiplexer Module Description

The FET multiplexer module provides high-speed switching (multiplexing)

for up to 16 channels. The module can be used as a scanning multiplexer

for a scanning voltmeter configuration, or as a stand-alone multiplexer in a

switchbox configuration. The channels are numbered 00 to 15. Each

channel provides connections for High (H), Low (L) and Guard (G),

although only High and Low are switched. The FET multiplexer module

can switch up to 100,000 connections per second (100 K switches/sec).

The FET multiplexer module consists of a component assembly and a

terminal module. There are three different terminal modules, one for each

of the following applications: HP E1351A 16-Channel FET Multiplexer

Module, HP E1353A 16-Channel Thermocouple FET Multiplexer Module,

and HP E1352A 32-Channel Single-Ended FET Multiplexer Module. The

component assembly is the same for all three applications. For information

on the 32-Channel Single-Ended FET Multiplexer Module, see the

HP E1352A User’s Manual.

The component assembly contains the VXIbus interface, the FET switches,

the analog bus connector and the digital bus. The terminal modules provide

connection points for the individual channels, as well as monitoring points

for the tree terminals and the direct terminals. The FET multiplexer module

can be externally triggered from the VXIbus backplane or through the

digital bus handshake lines on the front of the component assembly.

Chapter 1

Getting Started with the HP E1351A/53A 11

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For high-speed operation (100 K switches/sec.) the scanning list is

automatically downloaded into RAM on the multiplexer module.

Triggering for channel advance is from the two handshake lines on the

digital bus. The scanning operation does not require any intervention from

the mainframe CPU. This only applies for switchboxes or scanning

voltmeter configurations that have all FET multiplexer modules. For a

downloaded scan list in switchboxes, the trigger source must be

TRIG:SOUR DBUS or TRIG:SOUR IMM.

Multimeter Connection Points

There are three places where signals on a closed channel can be measured:

analog bus connector, tree terminals and direct terminals. Each of these

provides a different capability for configuring the module.

Analog Bus The analog bus connector provides a direct connection between multiple

multiplexer modules and also between a multiplexer module and HP

Connector

E1326/E1411 Multimeters. A ribbon cable is used to daisy-chain multiple

multiplexer modules together, and to connect a multimeter to the

multiplexer modules for a scanning voltmeter. The SCAN:PORT ABUS

command automatically closes the appropriate tree isolation switches to

route closed channels to the analog bus. This command must be executed in

a switchbox configuration. A scanning voltmeter automatically configures

the multiplexer for the analog bus connector.

Tree Terminals Tree terminals provide an external connection point through the terminal

modules for the signals which are on the analog bus lines. Tree terminals

are the recommended connection points for connecting stand-alone

multimeters and external current sources for 4-wire resistance

measurements.

Direct Terminals The 16 channels are separated into two banks, Bank 0 and Bank 1. When a

channel is closed, that channel is connected to a Bank Common. Channels

00 to 07 are on Bank 0 Common and channels 08 to 15 are on Bank 1

Common. The terminal module has connection points for the direct

terminals, where you can measure signals on the respective Bank

Commons. The banks can be isolated from each other, from the analog bus

connector, and from the tree terminals with the A and B tree isolation

switches.

12 Getting Started with the HP E1351A/53A

Chapter 1

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Figure 1-1. FET Multiplexer Module Block Diagram

Chapter 1

Getting Started with the HP E1351A/53A 13

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Switchbox and Scanning Voltmeter Configurations

A VXIbus instrument is a module or group of modules which perform a

specified function. For the HP E1300/01 mainframe, the first module in an

instrument must have a logical address which is evenly divisible by 8 (16,

24, 112), and the rest of the modules in the instrument are numbered

consecutively. The instrument’s secondary address is the whole number

equal to the logical address divided by 8 (for a logical address of 16, 17,

18,… 23, the secondary address is 02). For instrument definition in other

mainframes, see the mainframe manual. If an instrument consists of only

multiplexer modules, it is a switchbox configuration. If a multiplexer

module(s) is combined with a multimeter to form an instrument, that is a

scanning voltmeter configuration.

Switchbox A switchbox is a multiplexer module or group of multiplexer modules

which form a single instrument. A switchbox can be connected to a

multimeter which is a different VXIbus instrument, to an HP-IB controlled

multimeter, or to a stand-alone multimeter. The switchbox and the

multimeter have different secondary addresses. Separate configuration

commands must be sent to the switchbox and to the multimeter. The

following program illustrates the different addresses and the configuration

commands required. The HP-IB interface select code is 7, and the

mainframe address is 09. The multiplexer has an instrument address of 24,

so its secondary address is 03. The multimeter is HP-IB controlled, and has

a primary address of 22.

10 OUTPUT 722;"TRIG EXT;DC 10"

!Sets multimeter to external trigger

and to measure DC volts

20 OUTPUT 70903;"OUTP ON"

!Enables "Trig Out" port

30 OUTPUT 70903;"TRIG:SOUR BUS" !Sets switchbox to receive Bus

triggers

40 OUTPUT 70903;"SCAN:MODE VOLT"!Set up switchbox for voltage

measurements

50 OUTPUT 70903;"SCAN:PORT ABUS"!Closes the appropriate tree

isolation switches while scanning,

automatically makes connection to

the analog bus and tree terminals.

60 OUTPUT 70903;"ARM:COUN 2"

!Set for two cycles through the

scan list

70 OUTPUT 70903;"SCAN (@100;115)"!Selects the channel list. 100

selects first channel on card 1;

115 selects last channel on card 1

80 OUTPUT 70903;"INIT"

!Close first channel to start

scanning cycle

90 FOR I = 0 TO 15

100 ENTER 722;A

110 PRINT A

!Start count loop

!Enter reading into variable A

!Print reading in variable A

1 HP-IB is Hewlett-Packard’s implementation of IEEE Std 488.1-1978

14 Getting Started with the HP E1351A/53A

Chapter 1

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120 TRIGGER 70903

!Trigger the switchbox to advance

the channel list

130 NEXT I

140 END

!Increment count

Scanning Voltmeter When the multiplexer(s) is combined with a multimeter to form a single

instrument, they become a virtual instrument, a scanning voltmeter. The

multiplexer(s) and the multimeter have the same secondary address. The

multimeter automatically configures the multiplexer, so the SCAN:MODE,

SCAN:PORT and TRIG:SOUR commands are not required. Channel

advance is from the digital bus handshake lines, so the count loop is not

required. The ARM:COUN command does not apply to downloaded scan

lists, so you cannot specify the number of cycles through the scan list. You

can, however, specify INIT:CONT ON for continuous scanning through the

scan list.

10 DIM Rdgs(1:16)

!Dimension an array for 16

readings

20 OUTPUT 70903;"*RST"

!Reset instrument

30 OUTPUT 70903;"MEAS:VOLT:DC? (@100:115)"

!Configure instrument

40 ENTER 70903;Rdgs(*)

50 PRINT Rdgs(*)

60 END

!Enter readings into array

!Print results

Digital Bus and Triggering

The HP E1351A/E1353A can be triggered for channel advance from the

VXIbus backplane or through the digital bus handshake cable on the front

of the component assembly. Backplane triggering can come from HP-IB

computer commands over the HP-IB Bus or from the HP E1300/1301

Mainframe "Event In" port. Digital bus triggering uses two handshake

lines; channel advance and channel closed. Channel advance (input to

multiplexer) triggers an advance, and channel closed (output from

multiplexer) signifies advance completed.

The HP E1326B Multimeter has a digital bus port on the face plate, and

connects to the multiplexer with the digital bus cable (see Figures 2-10 and

2-11). To connect other multimeters for digital bus triggering, you must

prepare a custom cable. Use a connector like the one on the digital bus

cable (HP part number E1300-61611). Connect the measurement complete

port from the multimeter to the channel advance pin, and the external trigger

to the channel closed pin. Connect the grounds for both signals to the

digital bus ground (second pin from right). You can use this cable to

connect an external multimeter to a switchbox, and then use TRlG:SOUR

DBUS (digital bus triggering). You can also order a custom cable with

BNC to digital bus connectors, HP part number E1411-80001. See Figure

2-11 for more information on multiplexer-to-multiplexer and

multiplexer-to-multimeter connections.

Chapter 1

Getting Started with the HP E1351A/53A 15

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Figure 1-2. Custom Cable for Digital Bus Triggering

Programming Language

The examples in this manual use the Standard Commands for

Programmable Instruments (SCPI) commands, Hewlett-Packard BASIC and

an HP 9000 Series 200/300 computer over the HP-IB. Chapter 5 contains

information on SCPI command format. Appendix B contains details on the

registers for register-based programming.

Initial Operation

Use the following program to verify initial multiplexer operation by closing

a channel and querying channel closure. The computer interfaces to the

mainframe with the Hewlett-Packard Interface Bus (HP-IB). The HP-IB

interface select code is 7, and the mainframe address is 09. The multiplexer

has an instrument address of 24, so its secondary address is 03.

This example first resets the switchbox and then closes channel 02 of a

single multiplexer module (card number 1) in the switchbox. The program

next queries the channel closure state. A returned "1" shows that the

channel is closed, a returned "0" designates an open channel.

10 OUTPUT 70903;"*RST"

!Opens all channels

20 OUTPUT 70903;"CLOS (@102)"

!Close channel 02 on card 1

30 OUTPUT 70903;"CLOS? (@102)" !Query channel 02 state

40 ENTER 70903;Value

!Enter results into variable called

Value

50 PRlNT Value

60 END

!Display result

16 Getting Started with the HP E1351A/53A

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Chapter 2

Configuring the HP E1351A/53A FET

Multiplexer Modules

Using This Chapter

This chapter shows how to configure the 16-Channel FET Multiplexer

Modules, how to connect external wiring and how to connect multimeters.

This chapter contains the following sections:

• Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17

• Multiplexer Card Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

• Selecting the Interrupt Line Number . . . . . . . . . . . . . . . . . . . Page 20

• Setting the Card ID Switch . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

• Connecting User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22

• Adding Signal Conditioning Components/Current

Shunts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23

• Connecting Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

• Wiring a Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25

• Connecting Multimeters and Signal Generators . . . . . . . . . . Page 26

• Analog Bus and Digital Bus Cables . . . . . . . . . . . . . . . . . . . Page 27

Warnings and Cautions

Warning

SHOCK HAZARD. Only service-trained personnel who are

aware of the hazards involved should install, remove, or

configure the multiplexer modules. Before you install any

module, disconnect AC power from the mainframe and from

user wiring.

Caution

MAXIMUM VOLTAGE/CURRENT. The maximum voltage that

may be applied between High (H), Low (L), and Guard (G)

terminals is 15 V dc or 10.6 V rms (15 V peak). The maximum

current is 1 mA per channel.

STATIC ELECTRICITY. Static electricity is a major cause of

component failure. To prevent damage to the electrical

components in the multiplexer module, observe anti-static

techniques whenever removing a module from the mainframe

or whenever working on a module.

Chapter 2

Configuring the HP E1351A/53A FET Multiplexer Modules 17

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Multiplexer Card Numbers

HP plug-in modules installed in an HP VXIbus mainframe are treated as

independent instruments each having a unique secondary HP-IB address.

An instrument may be composed of a single plug-in module or multiple

plug-in modules. The card number identifies the module within a

switchbox or scanning voltmeter configuration. The multiplexer module

with the lowest logical address is always card number 01. The multiplexer

module with the next successive address is 02, and so on. Figure 2-1

illustrates the card numbers and logical addresses of typical single-module

switchboxes. Figure 2-2 illustrates the card numbers and logical addresses

of a typical multiple-module switchbox. Figure 2-3 illustrates the card

numbers and logical addresses of a typical multiple-module scanning voltmeter.

Figure 2-1. Card Numbers for Single-Module Switchboxes

Figure 2-2. Card Numbers for Multiple-Module Switchbox

18 Configuring the HP E1351A/53A FET Multiplexer Modules

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Figure 2-3. Card Numbers for Scanning Voltmeter

The logical addresses noted in Figures 2-1, 2-2, and 2-3 apply to modules

installed in an HP 75000 Series B Mainframe (HP Model Number

E1300A/E1301A) or in a mainframe with an HP E1405/1406 Command

Module. See the HP 75000 Series B Installation and Getting Started Guide

or the appropriate HP Command Module Manual for more information on

switchboxes and scanning voltmeter configurations, and logical addressing.

For uses in other systems or mainframes, see the appropriate manuals.

Setting the Address The logical address switch (LADDR) factory setting is 112. You may have

changed the switch setting during module installation. Valid address values are

Switch

from 1 to 255. Refer to the HP 75000 Series B System Installation and Getting

Started Guide or the appropriate HP Command Module Manual for addressing

information. Otherwise, refer to Figure 2-4 to reset the factory setting.

Figure 2-4. Setting the Logical Address Switch

Chapter 2

Configuring the HP E1351A/53A FET Multiplexer Modules 19

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Selecting the Interrupt Line Number

The multiplexer module generates interrupts at the end of a downloaded

scan list. The interrupt line number switch determines which backplane

IRQ line will be used. Different mainframes and resource managers

recognize different backplane IRQ lines. The interrupt line number must be

set to the line number your system is programmed to recognize. Refer to

your mainframe manual.

Refer to Figure 2-5 to change the interrupt lines. Valid line numbers are

from 1 to 7. Set the interrupt line number to the mainframe interrupt

handler number.

Figure 2-5. Setting the Interrupt Line Number

20 Configuring the HP E1351A/53A FET Multiplexer Modules

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Setting the Card ID Switch

The multiplexer module can be an HP E1351A, HP E1352A or HP E1353A

depending on which terminal module is installed. With a normal

connection, the terminal module will automatically configure the module

for the appropriate model. To identify a module without a terminal module,

set the Card ID switch as shown in Figure 2-6. The ID numbers are:

Model

Value

Configuration

all pins open

pin 3 closed

pin 1 closed

HP E1351A

HP E1352A

HP E1353A

For normal connections, leave the switch at the factory setting which is all

pins open.

Figure 2-6. Card ID Switch

Chapter 2

Configuring the HP E1351A/53A FET Multiplexer Modules 21

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Connecting User Inputs

The 16-Channel FET consists of a component module and a terminal

module. If the terminal module is not desired, Figure 2-7 shows the front

panel and the module’s connector pin-out which mates to the terminal

module.

Figure 2-7. 16-Channel FET Multiplexer Connector Pin-out

22 Configuring the HP E1351A/53A FET Multiplexer Modules

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Adding Signal Conditioning Components/Current Shunts

The multiplexer module’s terminal module allows you to add components

on each channel for the following:

– Low-Pass Filters

– Attenuators

– Current Shunts (for current measurements using a voltmeter)

Figure 2-8 shows how to install the appropriate components for the above

configurations. In the figure, channel 12 shows a low pass filter

configuration, channel 07 an attenuator configuration, and channel 04 a

current shunt configuration.

Figure 2-8. Signal Conditioning Components/Current Shunts

Chapter 2

Configuring the HP E1351A/53A FET Multiplexer Modules 23

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Connecting Field Wiring

Leads for the individual channels are connected through the channel

terminals on the terminal modules. Multimeters and signal generators can

be connected to the direct terminals or tree terminals on the terminal

modules. Figure 2-9 shows the terminal module channel terminals for the

16-Channel FET Multiplexer Module (HP E1351A) and the 16-Channel

Thermocouple FET Multiplexer Module (HP E1353A).

Wiring Guidelines

• If possible, use shielded cables with the shields connected to the Guard

(G) terminals and to the low connection near the measurement point.

• Be sure the wires make good connections on the screw terminals.

• For thermocouples, connect the Guard terminal to the

thermocouple’s shield lead and the low connection near the

measurement point.

Figure 2-9. FET Multiplexer Modules Terminal Module

24 Configuring the HP E1351A/53A FET Multiplexer Modules

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Wiring a Terminal Module

The following illustrations show how to connect field wiring to the terminal

module.

Chapter 2

Configuring the HP E1351A/53A FET Multiplexer Modules 25

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Connecting Multimeters and Signal Generators

Figure 2-10 shows how to connect the analog bus connector and the digital

bus handshake cable between multiple multiplexer modules and the HP

E1326B Multimeter. Use the cables shipped with the multiplexer modules

to make the connections.

Stand-alone multimeters and signal generators can also be connected to the

tree terminals or the direct terminals. Connections to the tree terminals and

the direct terminals are made on the terminal modules. If the multimeter

has "Voltmeter Complete" and "External Trigger" ports that use an open

collector TTL pulse, you can use a custom cable to connect it to the digital

bus for triggering (see “Digital Bus and Triggering” in Chapter 1).

Figure 2-10. Analog Bus and Digital Bus Connections

26 Configuring the HP E1351A/53A FET Multiplexer Modules

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Analog Bus and Digital Bus Cables

Figure 2-11 shows analog bus and digital bus cables for

multiplexer-to-multiplexer and multiplexer-to-multimeter connections.

Figure 2-11. Analog Bus and Digital Bus Cables

Chapter 2

Configuring the HP E1351A/53A FET Multiplexer Modules 27

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Notes

28 Configuring the HP E1351A/53A FET Multiplexer Modules

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Chapter 3

Using the HP E1351A/53A FET Multiplexer

Modules

Using This Chapter

This chapter uses some typical examples to show how to use the

16-Channel FET and 16-Channel Thermocouple FET Multiplexer Modules.

Refer to Chapter 4, “Understanding the HP E1351A/53A FET

Multiplexers” for further information. This chapter contains the following

sections:

• Selecting Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29

• Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31

• Connecting Switchbox Channels to Direct

Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32

• Connecting Switchbox Channels to Tree Terminals for

Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34

• Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . Page 36

• Downloading a Scan List. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 39

• Scanning a Switchbox without a Downloaded

Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 40

• Scanning a Switchbox with a Downloaded

Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 41

• Scanning Voltmeter Configuration with

HP E1326B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 42

• Measuring Temperature Using Thermocouples

(HP E1353A Module only) . . . . . . . . . . . . . . . . . . . . . . Page 43

Selecting Channels

Individual channels within a module or multiple-module instrument are

selected with the SCAN <channel_list> or OPEN and CLOSe

<channel_list> commands. OPEN and CLOSe <channel_list> immediately

opens/closes the specified channel. The SCAN <channel_list> command

creates a scanning list which can be downloaded into RAM on each module.

The INITiate command closes the first channel on the scan list, and the

selected trigger mode advances the rest of the channels.

The FET Multiplexer Module uses break-before-make logic so that a closed

channel is opened before the next channel is closed. Only one channel can

be closed at any given time on the FET multiplexer. The only exception is

in SCAN:MODE FRES (4-wire resistance measurements). You can,

however, have a channel closed on two different modules in the same

instrument.

Chapter 3

Using the HP E1351A/53A FET Multiplexer Modules 29

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To address specific channels within a multiplexer module in a switchbox or

scanning voltmeter configuration, you must send the appropriate SCPI

command string with a specified card number (cc) and channel number

(nn). The card number refers to the multiplexer module within a switchbox

or scanning voltmeter configuration. The multiplexer module with the

lowest logical address in a VXIbus instrument is card number 01, and the

next consecutively numbered multiplexer module is card number 02. If you

have more than one switchbox or scanning voltmeter configuration, the card

numbering sequence starts at 01 for each configuration. A channel address

is, therefore, a four digit number (ccnn). For channel 07 on card 02 the

address is 0207. You can delete leading zeros, so 207 is also a valid

channel address. The channel address <channel_list> is in the form:

• (@ccnn) for a single channel;

• (@ccnn,ccnn) for multiple channels;

• (@ccnn:ccnn) for sequential channels;

• (@ccnn:ccnn,ccnn:ccnn) for groups of sequential channels.

The OPEN and CLOSe commands should only be used with the

single-channel format and for one unique application of the

multiple-channel format. You can close a channel on two different cards in

the same instrument (e.g., 102 and 208) at the same time. You cannot close

two channels on the same card at the same time (102 and 108). Closing a

channel automatically opens all other channels on that card.

CLOSe (@102,208,309)

CLOSe (@103,204)

Closes 02 on card 1, 08 on card 2

and 09 on card 3.

Opens 102 and 208, closes 103 and

204; 309 left closed.

30 Using the HP E1351A/53A FET Multiplexer Modules

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Multiplexer Commands

The following commands are covered in Chapter 3. For a complete list and

description of commands see Chapter 5, “Command Reference”.

Table 3-1. Matrix Commands Used in Chapter 3

Description

Command

ARM:COUNt <number>

Selects number of scanning cycles for a switchbox only. Does not

apply to downloaded scan lists.

INITiate[:IMMediate]

Channel advance for TRIGger:SOURce BUS | HOLD.

Enables/disables continuous scanning cycles.

INITiate:CONTinuous <mode>

<mode> = 1 | 0 | ON | OFF

Closes specified channels.

[ROUTe:]CLOSe <channel_list>

[ROUTe:]CLOSe? <channel_list>

[ROUTe:]OPEN <channel_list>

[ROUTe:]SCAN <channel_list>

Queries mainframe for channel closure.

Opens specified channels.

Closes all channels in channel list one at a time. Previous channel

opens before next channel closes.

[ROUTe:]SCAN:MODE FRES

Closes paired channel relays (for example, channels 01 and 09)

during 4-wire ohms measurements.

[ROUTe:]SCAN:PORT ABUS

TRIGger[:IMMediate]

Automatically closes the tree isolation switches.

Channel advance for TRIGger:SOURce BUS | HOLD.

TRIGger:SOURce <source>

<source> = EXT | BUS | DBUS | IMM

Selects the trigger source as EXTernal, HP-IB BUS, Digital BUS,

or IMMediate.

NOTE: The commands with brackets ([ ]) are implied and are not shown in this chapter.

Chapter 3

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Connecting Switchbox Channels to Direct Terminals

The direct terminals provide direct access to closed channels. There is a

direct terminal for each bank, Bank 0 and Bank 1. Closing any channel in

Bank 0 (channels 00 to 07) connects the channel to the Bank 0 direct

terminal. Closing any channel in Bank 1 (channels 08 to 15) connects the

channel to the Bank 1 direct terminal. You can isolate the two banks from

each other, and from the analog bus connector and tree terminals, with the

SCAN:PORT NONE command. This command opens the A and B tree

isolation switches. Figure 3-1 shows how to connect channels 02 and 09 of

a single module to their respective direct terminals. Only one channel can

be closed at a time.

SCAN:PORT NONE

CLOSe (@102)

CLOSe (@109)

Opens Tree Isolation Switches.

Closes channel 02 on card 01.

Opens 02 then closes 09.

Figure 3-1. Connecting Channels 02 and 09 to their Respective

Direct Terminals

32 Using the HP E1351A/53A FET Multiplexer Modules

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Comments Isolation. The direct terminals provide a more accurate measurement than

the tree terminals or the analog bus connector as the signal does not have to

travel through the extra FET switches. The SCAN:PORT NONE command

opens the tree isolation switches and isolates the direct terminals from the

tree terminals and the analog bus connector.

The default value of SCAN:PORT is NONE for reset and power-on. If you

have not specified a different SCAN:PORT since reset or power-on, you do

not need to execute this command. You can also use the direct terminals

with SCAN:PORT ABUS. The signal for a given closed channel will then

be available at the direct terminal for that bank, the A tree terminal and the

analog bus connector.

Closing Channels. The FET multiplexer module only allows one channel

per card to be closed at a time, except for SCAN:MODE FRES (4-wire

resistance measurements) where two channels are closed. You can close a

channel on two different cards in the same instrument at the same time.

The SCAN <channel_list> command allows you to specify a list of channels

to be closed sequentially. The FET multiplexer module uses a

break-before-make procedure, so closed channels are opened before the

next one on the list is closed. The channels are advanced according to the

TRIGger mode selected.

Query Open/Closed Channels. The CLOSe? <channel_list> and OPEN?

<channel_list> commands determine if the channel(s) in the channel list are

open or closed, respectively. (The query command does not determine if, in

the event of a hardware failure, the channel remains open/closed.) For

example, to determine if channel 109 is closed, execute:

CLOS? (@109)

A response of "1" indicates the channel is closed, and a "0" indicates the

channel is open. The reverse is true for the OPEN? <channel_list>

command. The response for the OPEN? and CLOSe? commands are:

CLOS?

OPEN?

1 = Closed

0 = Open

1 = Open

0 = Closed

To find out which channel on a card is closed, use a channel list for the card.

CLOS? (@100:115)

and enter the response into a string variable. If channel 09 is closed, the

response will be:

0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0

NOTE: You must read the response after sending a query command or

the switchbox will generate an error.

Chapter 3

Using the HP E1351A/53A FET Multiplexer Modules 33

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Connecting Switchbox Channels to Tree Terminals for

Making Measurements

Connect external multimeters to the A tree terminal. The SCAN:PORT

ABUS command closes the appropriate FETs on the A and B tree isolation

switches, so that the channels that are closed are connected to both the

analog bus connector and the tree terminals. The A tree terminal is

connected to the H, L, and G lines, and the B tree terminal is connected to

the I +, I- and G lines. Figure 3-2 shows how to connect multimeters to

measure channel 02 and channel 09.

SCAN:PORT ABUS

CLOS (@102)

Enables tree isolation switches.

Close channel 02 on card 01.

Open 02, close 09.

CLOS (@109)

Figure 3-2. Closing Channels 02 and 09 for a Voltage Measurement

34 Using the HP E1351A/53A FET Multiplexer Modules

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Example: Connect The SCAN:MODE FRES command separates Bank 0 and Bank 1 for 4-wire

resistance measurements or other stimulus/response testing. Current or

signals are connected to the B tree terminal and go out through a channel on

one bank. The voltage signal response comes in through a channel on the

other bank and goes to the A tree terminal and the analog bus connector.

The current source and voltage response must be on channels that are eight

numbers apart (for example, 02 and 10, 15 and 07). You only need to

specify the channel that the voltage reading is on as the FET multiplexer

automatically closes the corresponding channel eight numbers away. Figure

3-3 shows a current source on channel 10 and the voltage reading on

channel 02.

Channels 02 and 10 to

Tree Terminals for

4-Wire Ohms

Measurement

SCAN:MODE FRES

CLOSe (@102)

Isolates Bank 0 from Bank 1.

Closes channels 02 and 10. 02 is

routed to A tree terminal and 10 is

routed to B tree terminal.

Figure 3-3. Connecting Channels 02 and 10 for 4-Wire Ohms Measurement

Chapter 3

Using the HP E1351A/53A FET Multiplexer Modules 35

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Scanning a Range of Switchbox Channels

You can scan a range of channels of a switchbox consisting of single or

multiple multiplexer modules. Scanning involves sequentially closing each

channel on a range of specified channels. The selected TRIGger mode

determines when the channel closure will advance. During scanning, the

FET which was previously closed opens before the next FET closes.

You can use any of the TRIGger modes to advance the channel list.

TRIGger:SOURce EXTernal requires an external trigger source to be connected

to the HP E1300/1301 Mainframe "Event In" port. For computer controlled or

HP-IB triggering (TRIGger or *TRG) use TRIGger:SOURce BUS. The

OUTput ON command enables the mainframe’s "Trig Out" port to synchronize

multimeters when not in the TRIGger:SOURce DBUS | IMM modes.

For the fastest scan rate (up to 100 K switches/sec.) use TRIGger:SOURce

DBUS. Use a custom cable (see “Digital Bus and Triggering” on page 15)

to connect the multimeter handshake lines (Voltmeter Complete and

External Trigger) to the multiplexer digital bus.

Example: Making Figures 3-4 and 3-5, and the following commands, show how to make

voltage measurements by performing a single scanning cycle of all channels

on two multiplexer modules in a single switchbox. In the example, the:

Voltage Measurements

by Scanning

• A Tree Terminals of each terminal module connect to each other and

to the multimeter in Figure 3-5. To connect the A tree terminals to

each other, use either the analog bus cables (shown in Figures 2-10

and 2-11) or wire the terminals together between the terminal

modules.

• HP-IB Bus trigger command advances the switchbox channel list.

• HP E1300A/E1301A Mainframe’s "Trig Out" pulse synchronizes the

switchbox with the multimeter.

• Multimeter HP-IB select code is 7 and primary address is 22.

• Switchbox HP-IB select code is 7, the HP-IB primary address is 09,

and the HP-IB secondary address is 14.

• Computer is an HP Series 200/300 Computer with HP BASIC using

HP-IB.

Enter and Execute:

10 OUTPUT 722;"TRIG EXT;DC 10"

!Sets multimeter to external

triggers and to measure dc volts

20 OUTPUT 70914;"OUTP ON"

!Enables "Trig Out" port

30 OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus

triggers

40 OUTPUT 70914;"SCAN:MODE VOLT"!Setup switchbox to measure

voltage

50 OUTPUT 70914;"SCAN:PORT ABUS"!Closes the appropriate tree

isolation switches while scanning;

automatically makes connection to

the analog bus and tree terminals.

36 Using the HP E1351A/53A FET Multiplexer Modules

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60 OUTPUT 70914;"SCAN (@100:215)"!Selects the channel list; 100

selects the first channel of module

#1 and 215 selects the last channel

of module #2.

70 OUTPUT 70914;"INIT"

!Close first channel to start the

scanning cycle

80 FOR I = 1 TO 32

90 ENTER 722;A

100 PRINT A

!Start count loop

!Enter reading into variable A

!Print reading in variable A

110 TRIGGER 70914

!Trigger the switchbox to advance

the scan list

120 NEXT I

130 END

!Increment count

Figure 3-4. Scanning Channels 100 to 215 of a Two-Module Switchbox

Chapter 3

Using the HP E1351A/53A FET Multiplexer Modules 37

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Figure 3-5. Mainframe to Multimeter Connection for Synchronization

Example: Making Use the same setup shown in the first program example in this section,

except the current source from the multimeter must be connected to the B

tree terminal. Change the commands in lines 10 and 40 to the following:

2-Wire Ohms

Measurements by

Scanning

10 OUTPUT 722;"TRIG EXT;OHM"

!Set multimeter to 2-wire ohms

40 OUTPUT 70914;"SCAN:MODE RES"!Closes the appropriate tree

isolation switches

This command, when used with SCAN:PORT ABUS and SCAN <channel_list>

commands, automatically closes the channels defined in the channel list, along

with the appropriate tree isolation switches. The current source is

superimposed on the channel being measured.

Example: Making This type of measurement requires a paired channel closure (for example,

channels 02 and 10). Use the SCAN:MODE FRES command to

automatically close the paired channels to the selected channels defined in

the SCAN <channel_list> command. Connect High and Low to a Bank 0

channel and High and Low to the paired channel eight numbers away. Use

only one of the channels of the channel pairs in the channel_list. Change

the commands in lines 10, 40 and 60 to the following:

4-Wire Ohms

Measurements by

Scanning

10 OUTPUT 722;"TRIG EXT;OHM"

!Set multimeter to 4-wire ohms

40 OUTPUT 70914;"SCAN:MODE FRES"!Closes the appropriate tree

isolation switches

60 OUTPUT 70914;"SCAN (@100:107,200:207)"

38 Using the HP E1351A/53A FET Multiplexer Modules

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Example: Making The ARM:COUNt <number> command selects multiple scanning cycles for

switchboxes with non-downloaded scans. It does not apply when the

TRIGger:SOURce is DBUS or IMMediate.

Multiple Scans

Add the command before the SCAN <channel_list> in the first program

example in this section. When the last channel in a channel list is closed,

the pointer is reset back to the beginning of the channel list. The next

trigger opens the last channel and closes the first one. This continues for the

specified number of cycles.

59 OUTPUT 70914;"ARM:COUN 10" !Enables 10 scanning cycles

60 OUTPUT 70914;"SCAN (@100:215)"!Sets scan list

80 FOR I = 1 TO 320

Example: Making The INITiate:CONTinuous ON command selects continuous scanning cycles

(INIT:CONT OFF disables continuous scanning cycles). Add the command

to the first program example in this section, as follows:

Continuous Scans

59 OUTPUT 70914;"INIT:CONT ON" !Enables continuous scanning

cycles

60 OUTPUT 70914;"SCAN (@100:215)"!Sets scan list

80 FOR I = 1 TO X

!Set the number of measurements

desired

Comments Scanning consists of six steps:

• Connecting the multimeter to the switchbox

• Selecting the SCAN:MODE

• Selecting the SCAN:PORT

• Selecting the TRIGger:SOURce

• Specifying the SCAN <channel_list>

• Starting the scan (INIT or TRIG[:IMMediate])

Downloading a Scan List

The FET Multiplexer Module is primarily designed to be used as a

high-speed scanning switchbox or scanning voltmeter. To enable it to make

100,000 connections per second, the SCAN <channel_list> scanning list is

downloaded into RAM on the module. This download takes place

automatically when you use TRIGger:SOURce DBUS or TRIGger:SOURce

IMM. For a multiple-module switchbox, the entire scanning list is

downloaded to each module. The channels are advanced to the next channel

in the channel list without any direct intervention by the mainframe CPU

during the scan.

The scan list is not downloaded for a switchbox or scanning voltmeter that

combines both FET and relay multiplexer modules, or for

TRIGger:SOURce BUS | EXT | HOLD. The channel closings are controlled

by the mainframe CPU. Also, the ARM:COUNt <number> command does

not apply to downloaded scan lists. You can use INITiate:CONTinuous ON

for continuous scanning with downloaded scan lists.

Chapter 3

Using the HP E1351A/53A FET Multiplexer Modules 39

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Scanning a Switchbox without a Downloaded Scan List

This example shows a FET switchbox connected to a multimeter with the

analog bus cable. The switchbox and multimeter are separate VXIbus

instruments. The multimeter has a secondary address of 03, and the

switchbox has a secondary address of 04. The multiplexer is triggered by

the *TRG command. OUTPut ON is enabled, and the multimeter is

triggered by the OUTPut ON trigger to its "External Trigger" port. The

following program illustrates the procedures:

10 DIM Rdgs(1:16)

!Dimension array to store readings

20 OUTPUT 70903;"*RST;*OPC?"

!Clear the multimeter; *OPC?

ensures reset is completed before

program continues

30 ENTER 70903;A

40 OUTPUT 70903;"*CLS"

50 OUTPUT 70904;"*RST"

60 OUTPUT 70904;"*CLS"

!Reset multiplexer

70 OUTPUT 70903;"CONF:VOLT:DC 58.1"!Configure the multimeter

80 OUTPUT 70903;"TRIG:SOUR EXT" !External trigger source

90 OUTPUT 70903;"TRIG:COUN 16" !Set for 16 triggers

100 OUTPUT 70903;"INIT"

!Initialize multimeter wait for

trigger

110 OUTPUT 70904;"TRIG:SOUR BUS" !Trigger on *TRG command

120 OUTPUT 70904;"SCAN:MODE VOLT"!Configure for voltage

130 OUTPUT 70904;"SCAN:PORT ABUS"!Enables analog bus

140 OUTPUT 70904;"SCAN (@100:115)"!Enter scan list

150 OUTPUT 70904;"OUTP ON"

160 OUTPUT 70904;"INIT"

170 FOR I = 1 TO 16

!Enable mainframe trig out port

!Close first channel

!16 channels

180 OUTPUT 70904;"*TRG"

190 WAIT .25

!Trigger for channel advance

!Allow time for measurement

before next advance

200 NEXT I

!Increment counter

210 OUTPUT 70903;"FETC?"

!Multimeter retrieves readings

from mainframe memory when

scan completes

220 ENTER 70903;Rdgs(*)

230 PRINT Rdgs(*)

240 END

!Put readings in array

!Print

40 Using the HP E1351A/53A FET Multiplexer Modules

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Scanning a Switchbox with a Downloaded Scan List

This example shows a FET switchbox connected to multimeter with the

analog bus cable and the digital bus cable. The switchbox and multimeter

are separate VXIbus instruments. The multimeter has a secondary address

of 03, and the switchbox has a secondary address of 04. The triggering is

through the digital bus handshake lines, so the scan list is downloaded. The

following program illustrates the procedures:

10 DIM Rdgs(1:16)

!Dimension array to store readings

20 OUTPUT 70903,"*RST,*OPC?"

!Clear the multimeter; *OPC?

ensures reset is completed before

program continues

30 ENTER 70903;A

40 OUTPUT 70903;"*CLS"

50 OUTPUT 70904;"*RST"

60 OUTPUT 70904;"*CLS"

!Reset multiplexer

70 OUTPUT 70903;"CONF:VOLT:DC 58.1"!Configure the multimeter

80 OUTPUT 70903;"TRIG:SOUR EXT" !External trigger source

90 OUTPUT 70903;"TRIG:COUN 16" !Set for 16 triggers

100 OUTPUT 70903;"INIT"

!Initialize multimeter, wait for

trigger

110 OUTPUT 70904;"STAT:OPER:ENAB 256"

!Enable operation complete bit

120 OUTPUT 70904;"TRIG:SOUR DBUS"!Digital bus triggers

130 OUTPUT 70904;"SCAN:MODE VOLT"!Configure for voltage

140 OUTPUT 70904;"SCAN:PORT ABUS"!Enables analog bus

150 OUTPUT 70904;"SETT:TIME MAX,(@100)"

!Delay for signal to settle before

multiplexer enables channel closed

pulse

160 OUTPUT 70904;"SCAN (@100:131)"!Enter scan list

170 OUTPUT 70904;"INIT"

!Close first channel

180 OUTPUT 70903;"FETC?"

!Multimeter retrieves readings

from mainframe memory when

scan completes

190 ENTER 70903;Rdgs(*)

200 PRINT Rdgs(*)

210 END

!Put readings in array

!Print

Chapter 3

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Scanning Voltmeter Configuration with HP E1326B

This example shows an HP E1326B Multimeter and an HP E1351A/

E1353A Multiplexer combined into a single VXIbus instrument, a scanning

voltmeter. The secondary address for the scanning voltmeter is 03. Both

the analog bus connector and the digital bus connector are used. Once the

scanning starts, there is no intervention from the mainframe CPU. The scan

list is in RAM on the multiplexer, and the two handshake lines on the digital

bus control the triggering.

The following program illustrates the procedures:

10 DIM Rdgs(1:16)

!Dimension array to store readings

20 OUTPUT 70903;"*RST;*OPC?"

!Clear the multimeter; OPC?

ensures reset is completed before

program continues

30 OUTPUT 70903;"*CLS"

40 OUTPUT 70903;"CONF:VOLT:DC (@100:115)"

!Configures multimeter; also

automatically configures

multiplexer for SCAN:MODE,

SCAN:PORT and TRIG:SOUR

50 OUTPUT 70903:"INIT"

60 OUTPUT 70903;"FETC?"

70 ENTER 70903;Rdgs(*)

80 PRINT Rdgs(*)

!Close first channel, start scan

!Retrieve readings from mainframe

90 END

Figure 3-6. Connecting the Analog Bus and Digital Bus Cables

42 Using the HP E1351A/53A FET Multiplexer Modules

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Measuring Temperature Using Thermocouples

(HP E1353A Module only)

The thermocouple terminal module automatically configures the HP

E1353A FET Multiplexer Module for thermocouple readings. The

multimeter measures the resistance of a thermistor on the terminal module

to provide a reference temperature. This reference temperature is used to

compensate for the change in temperature between the thermocouple

(desired measurement) and the terminal temperature (see “Comments” later

in this section).

Setup for Figure 3-7 shows how to set up channel 01 of a single module switchbox to

measure temperature using a thermocouple and an external multimeter.

Measuring

Thermocouple

Temperature using

an External

Multimeter

Figure 3-7. Temperature Measurement Using a Thermocouple

Chapter 3

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Comments Measuring Temperature with the HP El326B/El411B Multimeters. The

HP E1326B/E1411B Multimeters can directly measure channels of single or

multiple multiplexer modules. The multimeter automatically calculates the

correct temperature for the specific thermistor or thermocouple type used. For

more information, see the HP E1326B/E1411B Multimeter User’s Manual.

Thermocouple Compensated Measurements. The HP E1353A FET

Multiplexer makes thermocouple compensated measurements. Thermocouple

compensation accounts for the temperature inside the multiplexer terminal

module, which can affect the thermocouple reading. Thermocouple

compensated measurements are made with the HP E1326B/E1411B. More

information on these types of measurements can be found in Hewlett-Packard

Application Note 290, Practical Temperature Measurements.

High-Speed Temperature Measurements. High-speed temperature

measurements can be made by measuring the thermocouple voltage,

compensating the reading, and then converting the voltage to a temperature.

The instrument configuration used for these types of measurements may

include an E1326B/E1411B Multimeter and a FET multiplexer switchbox,

or an external voltmeter used with the FET switchbox. The procedure for

these types of measurements is:

1. Measure the resistance of the thermistor (channel 93) on the

multiplexer terminal module (CLOSe(@cc93)).

2. Measure the thermocouple voltage on the multiplexer channel.

3. Convert the thermistor resistance to a temperature using the

following equation:

t = 1.0 / (A + B lnr + C (lnr) )calculate temperature

t = t - 273.15

convert Kelvin to Centigrade

where:

A = 0.00128463

B = 0.00023625

C = 9.2697E-8

lnr = natural log of the measured thermistor resistance

A, B, and C are the curve-fitting constants for the multiplexer’s

5K thermistor.

4. Convert the thermistor temperature (step 3) to a voltage using the

reference table for the type of thermocouple used.

5. Subtract the voltage (step 4) from the thermocouple voltage

measured in step 2. Convert the difference between the voltages to a

temperature, again using the reference table for the type of

thermocouple used.

6. Add the temperature (step 5) to the thermistor temperature computed

in step 3 to obtain the result of the thermocouple measurement.

44 Using the HP E1351A/53A FET Multiplexer Modules

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Chapter 4

Understanding the HP E1351A/53A FET

Multiplexer Modules

Using This Chapter

This chapter explains techniques to scan the channels of 16-Channel FET

and 16-Channel Thermocouple FET Multiplexer Modules. This chapter

contains the following sections:

• Commands for Scanning Switchbox Channels . . . . . . . . . . . Page 45

• Using Scanning Trigger Sources . . . . . . . . . . . . . . . . . . . . . . Page 45

• Using the Scan Complete Bit. . . . . . . . . . . . . . . . . . . . . . . . . Page 52

Commands for Scanning Switchbox Channels

Scanning multiplexer channels consists of closing a set of channels, one at a

time. The multiplexer has single, multiple, or continuous scanning modes.

See Figure 4-1 for the different commands used in scanning.

Using Scanning Trigger Sources

The TRIGger:SOURce command specifies the source to advance the

channel list. Figure 4-2 shows the different trigger sources. TRIG:SOUR

DBUS uses the digital bus handshake lines. You can use the TRIG[:IMM]

command to immediately advance the channel list while in the TRIG:SOUR

BUS or TRIG:SOUR HOLD mode. (Note that TRIG:SOUR IMM is not the

same as TRIG[:IMM].) To enable the HP E1300/E1301 Mainframe "Trig

Out" port, use the OUTP ON command. The "Event In" mainframe trigger

source is reserved with the TRIG:SOUR EXT command. "Trig Out" and

"Event In" are mainframe resources, and can only be allocated to one

instrument at a time.

Scanning with The examples in this chapter show different ways to scan channels of a

switchbox in an HP E1300/E1301 Mainframe. The operation is similar to

other HP VXIbus mainframes with HP command modules that have "Trig

Out" and "Event In" ports. The computer used in the examples is an HP

External

Instruments

Series 200/300 used with HP BASIC as the program language. The

computer interfaces with the mainframe over HP-IB. Assumed is an:

• HP-IB select code of 7

• HP-IB primary address of 09 for the HP E1300/E1301 Mainframe

• HP-IB primary address of 22 for the HP 3457A Multimeter

• HP-IB secondary address of 14 for the multiplexer module

Chapter 4

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Figure 4-1. Scanning Commands

46 Understanding the HP E1351A/53A FET Multiplexer Modules

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Handshake Triggering (TRIG:SOUR BUS)

Uses digital bus on faceplate of multiplexer

module. Channel Advance and Channel

Closed continuously handshake with

Voltmeter Ready and Voltmeter Complete until

scanning list has completed specified number

of cycles.

Advancing Scan (TRIG[:IMM]

Immediate Triggering (TRIG:SOUR IMM)

This command advances the scan list

when in TRIG:SOUR HOLD or

TRIG:SOUR BUS. Advances the scan

list one channel per command.

Sets immediate internal triggering. The scan

list is automatically advanced through the

scan list. Due to the high speed of the FET

multiplexer, this mode should be used with

consideration for the capability of the

multimeter. This is the default trigger mode.

Trigger Hold (TRIG:SOUR HOLD)

Prevents execution of triggers until

trigger source is changed. Can use

TRIG[:IMM] command to trigger a

switchbox set to TRIG:SOUR HOLD.

Bus Triggering (TRIG:SOUR BUS)

Defines Trigger source as *TRG or HP-IB

GET command executed over the HP-IB.

The scan list is advanced one channel for

each *TRG or GET command received.

Enabling Trig Out Port (OUTP ON)

External Triggering (TRIG:SOUR EXT)

Generates a +5V negative-going pulse each

time a channel advances. OUTP ON reserves

the Trig Out Port so it is not available for any

other instrument in the mainframe.

Trigger source is a user supplied input to

the Event In BNC. Use a +5V

negative-going pulse to trigger.

TRIG:SOUR EXT reserves the Event In

resource so it is not available for any other

instrument in the mainframe.

As an alternative to OUTP ON, the Channel

Closed on the digital bus also pulses for each

channel closure.

Figure 4-2. Trigger Sources

Chapter 4

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Example: Scanning This example uses the mainframe "Trig Out" port to synchronize the

multiplexers to an HP 3457A Digital Multimeter. See the following figure

for typical connections. For this example, use the trigger output pulse of the

mainframe "Trig Out" port to trigger the multimeter from its "External

Trigger" port.

with External

Instruments

The sequence of operation is:

1. INIT (line 70) closes channel number 100.

2. The channel closure causes a trigger output from the "Trig Out" port.

3. The trigger causes the multimeter to make a measurement.

4. Measurement result is sent to the computer (lines 80 to 100).

5. TRIGGER command (line 110) advances the channel list to the next

channel.

6. Steps 2-5 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRIG EXT;DCV"

20 OUTPUT 70914;"OUTP ON"

!Sets multimeter to external trigger

and to measure dc volts

!Enables "Trig Out" port

30 OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus

triggers

40 OUTPUT 70914;"SCAN:MODE VOLT"!Sets switchbox to measure

voltage

50 OUTPUT 70914;"SCAN:PORT ABUS"!Closes the tree isolation switches

60 OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list for

scanning

70 OUTPUT 70914;"INIT"

80 FOR I = 1 TO 16

90 ENTER 722;A

100 PRINT A

!Starts scanning cycle

!Start count loop

!Enter reading into variable A

!Print reading in variable A

110 TRIGGER 70914

!Trigger the switchbox to advance

the channel list

120 NEXT I

130 END

!Increment count

48 Understanding the HP E1351A/53A FET Multiplexer Modules

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Example: Scanning This example uses the mainframe "Trig Out" and "Event In" ports to

synchronize the multiplexers to an HP 3457A Digital Multimeter. See the

following figure for typical connections.

Using "Trig Out" and

"Event In" Ports

For this example, use the trigger output pulse of the mainframe’s "Trig Out"

port to trigger the multimeter from its "External Trigger" port. Note that the

pulse output from the multimeter’s "Voltmeter Complete" port triggers the

switchbox to advance the channel list. Use the multimeter’s reading storage

capability to store readings.

The sequence of operation is:

1. INIT (line 50) closes channel number 100.

2. The channel closure causes a trigger output from the "Trig Out" port.

3. The trigger causes the multimeter to make a measurement.

4. Measurement result is stored into multimeter memory.

5. Trigger is output from multimeter’s "Voltmeter Complete" port.

6. Trigger to "Event In" port advances the channel list to the next channel.

7. Steps 2-6 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRIG EXT:DCV:MEM FIFO"

!Sets multimeter to external trigger

to measure dc volts and store

readings

20 OUTPUT 70914;"OUTP ON"

!Enables "Trig Out" port

30 OUTPUT 70914;"TRIG:SOUR EXT" !Sets switchbox to receive external

triggers

40 OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list (channels

100 to 115)

50 OUTPUT 70914;"INIT"

60 END

!Starts scanning cycle

Chapter 4

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Example: Scanning This example is similar to the previous one except that the multimeter’s

"External Trigger" and "Voltmeter Complete" ports are connected to the

"Channel Closed" and "Channel Advance" on the FET Multiplexer digital bus.

See Chapter 1 for information on making custom digital bus cables. Once the

scanning procedure has been initiated (INIT), the channel closure is advanced

by the handshake lines. The INIT command closes the first channel, and when

the channel is closed, the "Channel Closed" pulses. This is connected to the

"External Trigger" on the multimeter, which triggers a reading. When the

reading is complete, the "Voltmeter Complete" triggers, which pulses the

"Channel Advance". This procedure continues until the end of the scan list.

Using Stand-Alone

Multimeter and Digital

Bus Triggering

The sequence of operation is:

1. TRIG:SOUR DBUS selects digital bus triggering.

2. INIT (line 50) closes channel number 100.

3. The channel closure causes a trigger output from the "Channel

Closed" port.

4. The trigger causes the multimeter to make a measurement.

5. Measurement result is stored into multimeter memory.

6. Trigger is output from multimeter’s "Voltmeter Complete" port.

7. Trigger to "Advance Channel" port advances the channel list to the

next channel.

8. Steps 3-7 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRIG EXT;DCV;MEM FIFO"

!Sets multimeter to external trigger

to measure dc volts and store

readings

20 OUTPUT 70914;"SCAN:PORT ABUS"!Routes channels to analog bus

connector and A tree terminal

30 OUTPUT 70914;"TRIG:SOUR DBUS"!Sets switchbox to receive external

triggers

40 OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list (channels

100 to 115)

50 OUTPUT 70914;"INIT"

60 END

!Starts scanning cycle

50 Understanding the HP E1351A/53A FET Multiplexer Modules

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Example: Scanning In this example the HP E1326B Multimeter is combined with a FET

multiplexer to form a scanning voltmeter VXIbus instrument. The

multimeter is address 24, and the multiplexer is address 25, so the

instrument secondary address is 03. The analog bus connector and the

digital bus connector are connected between the modules. The

TRIG:SOURce is set for DBUS. This configuration provides the fastest

speed. Consult the HP E1326B/E1411B Multimeter User’s Manual for

further information on multimeter settings. Note that the ARM:COUNt

command does not apply to downloaded scan lists.

Using Scanning

Voltmeter

Configuration and

Digital Bus Triggering

The sequence of operation is:

1. The multimeter automatically configures the multiplexer for

SCAN:MODE, SCAN:PORT and TRIGger:SOURce DBUS.

2. INIT closes first channel.

3. The channel closure causes a trigger output from the "Channel

Closed" port.

4. The trigger causes the multimeter to make a measurement.

5. Measurement result is stored into multimeter memory.

6. Trigger is output from multimeter’s "Voltmeter Complete" port.

7. Trigger to "Advance Channel" port advances the channel list to the

next channel.

8. Steps 3-7 are repeated for channels 101 through 115.

10 DIM Rdgs(1:16)

!Dimension array for readings

!Reset scanning voltmeter

20 OUTPUT 70903;"*RST"

30 OUTPUT 70903;"CONF:VOLT DC (@100:115)"

!Sets multimeter to measure dc volts

40 OUTPUT 70903;"INIT"

50 OUTPUT 70903;"FETC?"

60 ENTER 70903;Rdgs(*)

70 PRINT Rdgs(*)

!Starts scanning cycle

!Get the readings

!Place values in array

!Print values

80 END

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Using the Scan Complete Bit

You can use the Scan Complete Bit (bit 8) in the SCPI Operation Status

can read it directly with the STAT:OPER? command (refer to the

STATus:OPERation[:EVENt]? command in Chapter 5 for an example).

Note that this is not the same register as the multiplexer Status/Control

When enabled by the STAT:OPER:ENAB 256 command, the Scan Complete

Bit will be reported as bit 7 of the Status Register. Use the HP-IB Serial

Poll or the IEEE 488.2 Common Command *STB? to read the Status

Common Command to assert an HP-IB Service Request (SRQ), you can

interrupt the controller when the Scan Complete Bit is set, after a scanning

cycle completes. This allows the controller to do other operations while the

scanning cycle is in progress.

The following example monitors bit 7 in the Status Register to determine

when the scanning cycle completes. The computer used in the example is

an HP Series 200/300 used with HP BASIC as the program language. The

computer interfaces with the mainframe over HP-IB. The HP-IB select

code is 7, the HP-IB primary address is 09, and the HP-IB secondary

address is 14.

Example: Scan

Complete Monitor

10 OUTPUT 70914;"*CLS"

!Clear all switchbox status

structure

20 OUTPUT 70914;"STAT:OPER:ENAB 256"

!Enable Scan Complete Bit to set

bit 7 in Status Register

30 OUTPUT 70914;"*SRE 128"

!Enable bit 7 of Status Register to

assert SRQ

40 OUTPUT 70914;"TRIG:SOUR EXT" !Set to external trigger mode

50 OUTPUT 70914;"SCAN (@100:115)"!Select channels to be scanned

60 OUTPUT 70914;"INIT"

!Start scanning cycle

70 WHILE NOT BIT (SPOLL(70914),7) !Waiting for scan complete

80 PRINT "DO OTHER OPERATION HERE"

!Enter program lines for computer

to do other operations

90 END WHILE

100 PRINT "INTERRUPT GENERATED" !Program goes to this line after

interrupt is generated by a

completed scanning cycle

110 END

52 Understanding the HP E1351A/53A FET Multiplexer Modules

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Chapter 5

HP E1351A/53A 16-Channel FET

Multiplexer Command Reference

Using This Chapter

This chapter describes Standard Commands for Programmable Instruments

(SCPI) commands and summarizes IEEE 488.2 Common (*) Commands

applicable to the 16-Channel FET and 16-Channel Thermocouple FET

Multiplexer Modules. This chapter contains the following sections:

• Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 53

• SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . Page 55

• IEEE 488.2 Common Commands . . . . . . . . . . . . . . . . . . . . . Page 76

• Command Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . Page 77

Command Types

Commands are separated into two types: IEEE 488.2 Common Commands

and SCPI Commands.

Common The IEEE 488.2 standard defines the Common Commands that perform

functions like reset, self-test, status byte query, etc. Common Commands

Command Format

are three or four characters in length, always begin with the asterisk

character (*), and may include one or more parameters. The command

keyword is separated from the first parameter by a space character. Some

examples of Common Commands are shown below:

*RST

*ESR 32

*STB?

SCPI Command The SCPI com mands perf`orm functions like closing switche s, making

measurements, querying instrument states or retrieving data. A subsystem

Format

command structure is a hierarchical structure that usually consists of a

top-level (or root) command, one or more lower level commands, and their

parameters. The following example shows part of a typical subsystem:

[ROUTe:]

CLOSe <channel_list>

SCAN <channel_list>

:MODE VOLT

[ROUTe:] is the root command, CLOSe and SCAN are second-level

commands with <channel_list>as a parameter, and MODE is a third-level

command with the parameter VOLT.

Chapter 5

HP E1351A/53A 16-Channel FET Multiplexer Command Reference 53

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Command Separator A colon (:) always separates one command from the next lower level

command as shown below:

ROUTe:SCAN:MODE VOLT

Colons separate the root command from the second-level command

(ROUTe:SCAN) and the second-level from the third-level (SCAN:MODE

VOLT). The parameters of a command are separated from the command by

a blank space.

Abbreviated The command syntax shows most commands as a mixture of upper and

lower case letters. The upper case letters indicate the abbreviated spelling

for the command. For shorter program lines, send the abbreviated form.

For better program readability, you may send the entire command. The

instrument will accept either the abbreviated form or the entire command.

Commands

For example, if the command syntax shows MEASure, then MEAS and

MEASURE are both acceptable forms. Other forms of MEASure, such as

MEASU or MEASUR will generate an error. You may use upper or lower

case letters. Therefore, MEASURE, measure, and MeAsUrE are all

acceptable.

Command keywords can be entered in their full form, as shown above, or

can be entered in their short form. In this manual, the entry required in

short form commands is always capitalized. The short form is generally

used for examples in this manual.

Implied Commands Implied commands are those which appear in square brackets ([ ]) in the

command syntax. (Note that the brackets are not part of the command and

are not sent to the instrument.) Suppose you send a second level command

but do not send the preceding implied command. In this case, the

instrument assumes you intend to use the implied command and it responds

as if you had sent it. Examine this excerpt from the [ROUTe:] subsystem

shown below:

[ROUTe:]

SCAN <channel_list>

:MODE <mode>

:MODE?

:PORT <port>

Both the root command [ROUTe:] is an implied command. To set the

instrument’s scanning list, you can send either of the following command

statements:

ROUTe:SCAN (@100:115)

SCAN (@100:115)

Note

You must include a space between the keywords and any parameters.

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Parameters Parameter Types. The following table contains explanations and examples

of parameter types you might see later in this chapter.

Parameter Type

Explanations and Examples

Numeric

Accepts all commonly used decimal representations of

numbers including optional signs, decimal points, and

scientific notation.

123, 123E2, -123, -1.23E2, .123, 1.23E-2, 1.23000E-01.

Special cases include MIN, MAX, and DEF. MIN selects

minimum value available, MAX selects maximum value

available, and DEF selects default or reset value.

Boolean

Discrete

Represents a single binary condition that is either true or false.

1 or ON; 0 or OFF.

Selects from a finite number of values. These parameters

use mnemonics to represent each valid setting.

An example is the TRIGger:SOURce <source> command

where source can be BUS, DBUS, EXT, HOLD, or IMM.

Optional Parameters. Parameters shown within square brackets ([ ]) are

optional parameters. (Note that the brackets are not part of the command

and are not sent to the instrument.) If you do not specify a value for an

optional parameter, the instrument chooses a default value. For example,

consider the ARM:COUNt? [<MIN | MAX>] command. If you send the

command without specifying a parameter, the present ARM:COUNt value is

returned. If you send the MIN parameter, the command returns the

minimum count available. If you send the MAX parameter, the command

returns the maximum count available. Be sure to place a space between the

command and the parameter.

Linking Commands Linking IEEE 488.2 Common Commands with SCPI Commands.

Use a semicolon between the commands. For example:

*RST;OUTP ON or TRIG:SOUR BUS;*TRG

Linking Multiple SCPI Commands. Use both a semicolon and a colon

between the commands. For example:

ARM:COUN 1;:TRIG:SOUR EXT

SCPI Command Reference

This section describes the Standard Commands for Programmable

Instruments (SCPI) commands for the multiplexer modules. Commands are

listed alphabetically by subsystem and also within each subsystem.

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ABORt

The ABORt subsystem stops a scan in progress when the scan is enabled via

the interface, and the trigger modes are TRIGger:SOURce BUS or

TRIGger:SOURce HOLD.

Subsystem Syntax

Comments

ABORt

• ABORt Operation. Resets the trigger system and places triggers in

idle. The scan is stopped without resetting the scan conditions. The

scan conditions stay in the current configuration.

• Stopping Scans Enabled from Interface. When a scan is enabled

from the interface, use an interface CLEAR command or the HP

E1301 front panel "Reset Instr" or "Clear Instr" key to stop the scan.

When the scan is enabled from the interface and the trigger source is

TRIGger:SOURce BUS or TRIGger:SOURce HOLD, use ABORt or

the HP E1301 front panel "Reset Instr "or "Clear Instr "keys to stop

the scan.

• Stopping Scans Enabled from Front Panel. When a scan is

enabled from the HP E1301 front panel execute *RST over the

interface or use the front panel "Reset Instr "or "Clear Instr" keys to

stop the scan.

• Related Commands. ARM, INITiate:CONTinuous, [ROUTe:]SCAN,

TRIGger

Example Stopping a Scan with ABORt

TRIG:SOUR BUS

Bus is trigger source.

Set continuous scanning.

Sets channel list.

INIT:CONT ON

SCAN (@100:115)

INIT

Starts scanning cycle.

ABOR

Aborts scan in progress.

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ARM

The ARM subsystem selects the number of scanning cycles (1 - 32767) for

each INIT command. This command does not apply to downloaded scan

lists. For downloaded scan lists, use INIT:CONT ON for multiple scans.

Subsystem Syntax

ARM

:COUNt <number> MIN | MAX

:COUNt? [MIN | MAX]

:COUNt ARM:COUNt <number> MIN | MAX allows scanning cycles to occur a

multiple of times (1 to 32767) with one INITiate command and when

INITiate:CONTinuous OFF | 0 is set. MIN sets 1 scanning cycle and MAX

sets 32,767 scanning cycles.

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

1 - 32767 | MIN | MAX

number

Comments

• Number of Scans: Use only numeric values between 1 to 32767 for

the number of scanning cycles (default is 1).

• Related Commands: ABORt, INITiate[:IMMediate]

• *RST Condition: ARM:COUNt 1

Example Setting Ten Scanning Cycles

ARM:COUN 10

SCAN (@100:115)

INIT

Set 10 scanning cycles.

Sets channel list.

Starts scanning cycle.

:COUNt? ARM:COUNt? [MIN | MAX] returns the current number of scanning cycles

set by ARM:COUNt. ARM:COUN? MIN returns 1 and ARM:COUN? MAX

returns 32767.

Parameters

Parameter Name

Parameter Type

Range of Values

MIN | MAX

Numeric

MIN = 1, MAX = 32767

Comments

• Related Commands: INITiate[:IMMediate]

Example Query Number of Scanning Cycles

ARM:COUN 10

ARM COUN?

Sets 10 scanning cycles.

Query number of scanning cycles;

returned value is 10.

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DISPlay

The DISPlay subsystem monitors the channel state of a selected module (or

card). This command can only be used when the FET multiplexer module

is used in a switchbox configuration. It operates with mainframes that have

a display, such as the HP 75000 Series B Mainframe (HP Model Number

E1301). It also operates with terminals connected to the serial interface port.

Subsystem Syntax

DISPlay

:MONitor

:CARD <number | AUTO>

[:STATe] <mode>

:MONitor:CARD DISPlay:MONitor:CARD <number | AUTO> selects the module in a

switchbox to be monitored.

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

1 - 99

number | AUTO

Comments

• Selecting a Specific Module to be Monitored: Send the card

number in a switchbox with the DISPlay:MONitor:CARD command.

• Selecting the Present Module to be Monitored: Use the

DISPlay:MONitor:CARD AUTO command to select the last module

addressed by a switching command (e.g., [ROUTe:]CLOSe).

• *RST Condition: DISPlay:MONitor:CARD AUTO

Example Select Module #2 in a Switchbox for Monitoring

DISP:MON:CARD 2

Selects module #2 in a switchbox.

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:MONitor[:STATe] DISPlay:MONitor[:STATe] <mode> turns the monitor mode on or off.

Parameters

Parameter Name

Parameter Type

Range of Values

Boolean

0 | 1 | ON | OFF

mode

Comments

• Monitoring Switchbox Channels: DISPlay:MONitor[:STATe] ON

or DISPlay:MONitor[:STATe] 1 turns the monitor mode on to show

the channel state of the selected module. DISPlay:MONitor[:STATe]

OFF or DISPlay:MONitor[:STATe] 0 turns the monitor mode off.

• Selecting the Module to be Monitored: Use the DISPlay

MONitor:CARD <number> | AUTO command to select the module.

• Monitor Mode on an HP 1301 Mainframe Display: The

following three examples show the types of display you will get:

Chan: _

No channels closed on this card.

Channel 12 closed.

Chan: 12

Chan: 9,1

4-wire ohms set-up with voltage on

channel 9.

• *RST Condition: DISPlay:MONitor[:STATe] OFF | 0

Example Enabling the Monitor Mode

DISP:MON:CARD 2

DISP:MON 1

Selects module #2 in a switchbox.

Turns the monitor mode on.

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INITiate

The INITiate subsystem selects continuous scanning cycles and starts the

scanning cycle.

Subsystem Syntax

INITiate

:CONTinuous <mode>

:CONTinuous?

[:IMMediate]

:CONTinuous INITiate:CONTinuous <mode> enables or disables continuous scanning

cycles for the switchbox or scanning voltmeter.

Parameters

Parameter Name

Parameter Type

Range of Values

Boolean

0 | 1 | ON | OFF

mode

Comments

• Continuous Scanning Operation: Continuous scanning is enabled

with the INITiate:CONTinuous ON or INITiate:CONTinuous 1

command. Sending the INITiate[:IMMediate] command closes the

first channel in the channel list. Each trigger from a trigger source

specified by the TRIGger:SOURce command advances the scan

through the channel list. A trigger at the end of the channel list

closes the first channel in the channel list and the scan cycle repeats.

Continuous scanning can be stopped by the ABORt command for

non-downloaded scans, and by a system reset or a power off for

downloaded scan lists.

• Scanning a Set Number of Cycles: The INITiate:CONTinuous OFF

or INITiate:CONTinuous 0 command goes through the scan list the

number of times specified by the ARM:COUNt command. Sending

the INITiate[:IMMediate] command closes the first channel in the

channel list. Each trigger from a trigger source selected by the

TRIGger:SOURce command advances the scan through the channel

list. A trigger at the end of the channel list opens the last channel in

the channel list, and if the number of cycles has not reached the

ARM:COUNt parameter, returns to the beginning of the scan list and

closes the first channel. When the number of cycles equals the

ARM:COUNt parameter, the scanning cycle stops. Note that

ARM:COUNt does not apply to downloaded scan lists.

• Stopping Continuous Scans: Continuous scanning can be stopped

by the ABORt command for non-downloaded scans, and by a system

reset or a power off for downloaded scan lists.

• Related Commands: ABORt, ARM:COUNt, *RST, TRIGger,

TRIGger:SOURce

• *RST Condition: INITiate:CONTinuous OFF

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Example Enabling Continuous Scans

INIT:CONT ON

SCAN (@100:115)

INIT

Enables continuous scanning.

Sets channel list.

Starts scanning cycle.

:CONTinuous? INITiate:CONTinuous? queries the scanning state. With continuous

scanning enabled, the command returns 1 (ON). With continuous scanning

disabled, the command returns 0 (OFF).

Example Query Continuous Scanning State

INIT:CONT ON

INIT:CONT?

Enables continuous scanning.

Query continuous scanning state.

[:IMMediate] INITiate[:IMMediate] starts the scanning cycle and closes the first channel

in the channel list. Successive triggers from the source specified by the

TRIGger:SOURce command advances the scan through the channel list.

Comments

• Starting the Scanning Cycle: The INITiate[:IMMediate] command

starts scanning by closing the first channel in the channel list. Each

trigger received advances the scan to the next channel in the channel

list. An invalid channel list generates an error (see the

[ROUTe:]SCAN command).

• Stopping Scanning Cycles: See the ABORt command.

Example Enabling a Single Scan

SCAN (@100:115)

INIT

Sets channel list.

Starts scanning cycle.

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OUTPut

The OUTPut subsystem enables or disables the "Trig Out" port of the HP

E1300/E1301 Mainframe.

Subsystem Syntax

OUTPut

[:STATe] <state>

[:STATe]?

[:STATe] OUTPut[:STATe] <state> enables/disables the "Trig Out" port on the rear

panel of the HP E1300/E1301 Mainframe. OUTPut[:STATe] ON | 1 enables

the port and OUTPut[:STATe] OFF | 0 disables the port.

Parameters

Parameter Name

Parameter Type

Range of Values

Boolean

0 | 1 | ON | OFF

state

Comments

• Downloaded Scans: The OUTPut subsystem does not work with

downloaded scan lists. The scan list is downloaded automatically if

you use TRIG:SOUR DBUS or TRIG:SOUR IMM (FET multiplexers

only). OUTPut works with all other scanning methods.

• Enabling "Trig Out" Port: When enabled, the "Trig Out" port is

pulsed each time a channel is closed during scanning. When

disabled, the "Trig Out" port is not pulsed.

• Output Pulse: The pulse is a +5 V negative-going pulse.

• "Trig Out" Port Reserved by Switchboxes: The "Trig Out"

resource is a system resource, and can only be reserved by one

instrument at a time.

• Related Commands: [ROUTe:]SCAN, TRIGger:SOURce

• *RST Condition: OUTPut[:STATe] OFF (port disabled)

Example Enabling "Trig Out" Port

OUTP ON

Enables "Trig Out" port for pulse

output.

[:STATe]? OUTPut[:STATe]? queries the present state of the "Trig Out" port. The

command returns 1 if the port is enabled, or 0 if disabled.

Example Query "Trig Out" Port State

OUTP ON

Enables "Trig Out" port for pulse

output.

OUTP:STAT?

Query port enable state.

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[ROUTe:]

The [ROUTe:] subsystem controls switching and scanning operations for the

multiplexer modules in a switchbox.

Subsystem Syntax

[ROUTe:]

CLOSe <channel_list>

CLOSe? <channel_list>

OPEN <channel_list>

OPEN? <channel list>

SCAN <channel_list>

:MODE <mode>

:MODE?

:PORT <port>

:PORT?

SETTling

[:TIME] <time>, <channel_list>

[:TIME]? [MIN | MAX] <channel_list>

CLOSe [ROUTe:]CLOSe <channel_list> closes multiplexer channels specified in the

channel list. The channel_list for CLOSe is in the form (@ccnn), or in special

circumstances, (@ccnn,ccnn), where cc = card number (00-99) and nn = channel

number (00-15). Before using the CLOSe command, you must specify the

SCAN:MODE and SCAN:PORT, as these commands determine what switches

will be closed for a given channel. You can only have one closed channel on a

card at a time. If you want to close a channel on two different cards in the same

VXIbus instrument (for example, 102,208) you can use (@ccnn,ccnn).

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

cc00 - cc15

channel_list

Comments

• Specify SCAN:MODE and SCAN:PORT: Before using the CLOSe

command, specify the SCAN:MODE and SCAN:PORT.

• Closing Channels: To close:

– use [ROUTe:]CLOSe (@ccnn) for a single channel;

– use [ROUTe:]CLOSe (@ccnn,ccnn) for single channels on

different cards;

– use [ROUTe:]CLOSe (@ccnn,ccnn) for multiple channels;

– use [ROUTe:]CLOSe (@ccnn:ccnn) for sequential channels;

– use [ROUTe:]CLOSe (@ccnn:ccnn,ccnn:ccnn) for a group of

sequential channels;

– or any combination.

Closure order for multiple channels with a single command is

not guaranteed.

• Related Commands: [ROUTe:]OPEN, [ROUTe:]CLOSe?,

[ROUTe:]SCAN:MODE, [ROUTe:]SCAN:PORT

• *RST Condition: All multiplexer channels are open.

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Example Closing Multiplexer Channels

This example closes channel 00 of a multiplexer module card number 1 and

channel 15 of multiplexer module card number 2 in a single switchbox.

SCAN:MODE VOLT

SCAN:PORT ABUS

CLOS (@100,215)

100 closes channel 00 of card #1;

215 closes channel 15 of card #2.

CLOSe? [ROUTe:]CLOSe? <channel_list> returns the current state of the

channel(s) queried. The channel list is in the form (@ccnn). The command

returns 1 if channels are closed and returns 0 if the channels are open.

Comments

• Query is Software Readback: The [ROUTe:]CLOSe? command

returns the current software state of the channel specified. It does

not account for relay hardware failures.

Example Query Multiplexer Channel Closure

CLOS (@100,215)

100 closes channel 00 of card #1;

215 closes channel 15 of card #2.

CLOS? (@215)

Query channel 215.

OPEN [ROUTe:]OPEN <channel_list> opens the multiplexer channels specified

in the channel_list. The channel_list is in the form (@ccnn), (@ccnn,ccnn),

(@ccnn:ccnn) or (@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99)

and nn = channel number (00-15).

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

cc00 - cc15

channel_list

Comments

• Opening Channels: To open:

– use [ROUTe:]OPEN (@ccnn) for a single channel;

– use [ROUTe:]OPEN (@ccnn,ccnn) for multiple channels;

– use [ROUTe:]OPEN (@ccnn:ccnn) for sequential channels;

– use [ROUTe:]OPEN (@ccnn:ccnn,ccnn:ccnn) for a group of

sequential channels;

– or any combination.

Opening order for multiple channels with a single command is not

guaranteed.

• Open Channels: Opening an already open channel has no effect.

• Related Commands: [ROUTe:]CLOSe, [ROUTe:]OPEN?

• *RST Condition: All multiplexer channels are open.

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Example Opening Multiplexer Channels

This example opens channel 00 of a multiplexer module card number 1 and

channel 15 of multiplexer module card number 2 in a single switchbox.

OPEN (@100,215)

100 opens channel 00 of card #1;

215 opens channel 15 of card #2.

OPEN? [ROUTe:]OPEN? <channel_list> returns the current state of the channel(s)

queried. The channel list is in the form (@ccnn). The command returns 1

if the channel is open or returns 0 if the channel is closed.

Comments

• Query is Software Readback: The [ROUTe:]OPEN? command

returns the current software state of the channel(s) specified. It does

not account for relay hardware failures.

Example Query Multiplexer Channel Open State

OPEN (@100,215)

100 opens channel 00 of card #1;

215 opens channel 15 of card #2.

OPEN? (@215)

Query state of channel 215.

SCAN [ROUTe:]SCAN <channel_list> defines the channels to be scanned. The

channel_list has the form (@ccnn), (@ccnn,ccnn), (@ccnn:ccnn) or

(@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99) and nn = channel

number (00-15).

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

cc00 - cc15

channel_list

Comments

• Channel List: Valid channel lists are:

– a single channel, use (@ccnn);

– for multiple channels, use (@ccnn,ccnn);

– sequential channels, use (@ccnn:ccnn);

– a group of sequential channels, use (@ccnn:ccnn,ccnn:ccnn);

– or any combination.

• Defining the Channel List. When executing [ROUTe:]SCAN, the

channel list is checked for valid card and channel numbers. An error

is generated for an invalid channel list.

• Downloading a Scanning List: The channel_list is automatically

downloaded into RAM on the FET multiplexer modules for

TRIG:SOUR DBUS and TRIG:SOUR IMM trigger modes. The

complete list is downloaded onto each module in an instrument. The

channels are advanced with no direct intervention by the mainframe

CPU during the scan. If an instrument contains mixed modules

(FET and Relay Multiplexers), the scan list will not be downloaded.

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• Scanning Operation: With a valid channel list,

INITiate[:IMMediate] starts the scanning cycle and closes the first

channel in the channel list. Successive triggers from the source

specified by TRIGger:SOURce advances the scan through the

channel list.

• Stopping Scan: See the ABORt command.

• Related Commands: TRIGger, TRIGger:SOURce

• *RST Condition: All multiplexers channels are open.

Example Scanning Using External Instruments

The following example shows how to scan channels using the HP E1300A/

E1301A Mainframe via HP-IB and an HP 3457A Digital Multimeter. This

example uses the mainframe’s "Trig Out" port to synchronize the

multiplexer module in a switchbox to the multimeter. The trigger pulse

from the port triggers the multimeter for a measurement. See Chapters 2

and 3 for typical user connections to the multiplexer.

The computer used in the example is an HP Series 200/300 with HP BASIC

as the program language. The computer interfaces with the mainframe over

HP-IB. Assumed is an HP-IB select code of 7, an HP-IB primary address of

09 and 22 for the HP E1300A/E1301A Mainframe and HP 3457A

Multimeter, respectively, and an HP-IB secondary address of 14 for the

switchbox.

10 OUTPUT 722;"TRIG EXT;DCV"

!Sets multimeter to external trigger

and to measure dc volts

20 OUTPUT 70914;"OUTP ON"

!Enables "Trig Out" port

30 OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus

triggers

40 OUTPUT 70914;"SCAN:MODE VOLT"!Sets switchbox to measure

voltage during scanning

50 OUTPUT 70914; "SCAN:PORT ABUS"!Sets switchbox to close the

appropriate tree switches during

scanning

60 OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list

70 OUTPUT 70914;"INIT"

80 FOR I = 1 TO 16

90 ENTER 722;A

100 PRINT A

!Starts scanning cycle

!Start count loop

!Enter reading into variable A

!Print reading in variable A

110 TRIGGER 70914

!Trigger the switchbox to advance

the channel list

120 NEXT I

130 END

!Increment count

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SCAN:MODE [ROUTe:]SCAN:MODE <mode> sets the multiplexer channels defined by

the [ROUTe:]SCAN <channel_list> command for None, Volts, 2-Wire

Ohms, or 4-Wire Ohms measurements.

Parameters

Parameter Name

Parameter Type

Range of Values

Discrete

NONE | VOLT | RES | FRES

mode

Comments

• Order of Command Execution: The [ROUTe:]SCAN:MODE

command must be executed before the [ROUTe:]SCAN <channel_list>

and [ROUTe:]CLOSe <channel_list> commands.

• NONE and VOLT Mode Description: When selected, channel list

is set up for volts measurements.

• RES Mode Description: When selected, channel list is set up for

2-wire ohms measurements. The current source on I+ and I- is

superimposed on the channel being measured. Appropriate tree

isolation switches are automatically closed.

• FRES Mode Description: When selected, channel list is set up for

4-wire ohms measurements. Specify only the channel on which the

voltage is to be measured. The paired channel (plus or minus eight

channels away) on the other bank will automatically close. If you

specify both channels (@102, 110), the module will first setup for

FRES reading on 02, then setup for FRES reading on 10.

• *RST Condition: [ROUTe:]SCAN:MODE NONE

Example Selecting the 4-Wire Ohms Mode. This example scans 8 channels for

4-wire ohms resistance measurements.

TRIG:SOUR EXT

Selects external trigger source.

SCAN:MODE FRES

Selects the 4-wire ohms scanning

mode.

SCAN (@100:115)

INIT

Sets channel list.

Starts scanning cycle.

SCAN:MODE? [ROUTe:]SCAN:MODE? returns the current state of the scan mode. The

command returns NONE, VOLT, RES, or FRES if the scan mode is in the

NONE, VOLT, RES, or FRES mode, respectively.

Example Query Scan Mode

This example selects the 4-wire ohms measurement mode (FRES), then

queries the measurement state. Because 4-wire ohms mode is selected, the

query command returns FRES.

SCAN:MODE FRES

SCAN:MODE?

Selects the 4-wire ohms scanning

mode.

Query the scanning mode.

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SCAN:PORT [ROUTe:]SCAN:PORT <port> enables/disables the tree isolation switches.

SCAN:PORT ABUS closes the appropriate tree switches (for analog bus

connections). The [ROUTe:]SCAN:PORT NONE command disables the tree

switches and leaves them open. With SCAN:PORT NONE the closed

channels can only be measured through the respective bank direct terminals.

Parameters

Parameter Name

Parameter Type

Range of Values

Discrete

ABUS | NONE

port

Comments

• Order of Command Execution: The [ROUTe:]SCAN:PORT

command must be executed before the [ROUTe:]SCAN <channel_list>

and [ROUTe:]CLOSe <channel_list> commands.

• *RST Condition: [ROUTe:]SCAN:PORT NONE

Example Selecting the ABUS Port

TRIG:SOUR EXT

Selects external trigger source.

SCAN:MODE FRES

Selects the 4-wire ohms scanning

mode.

SCAN:PORT ABUS

SCAN (@100:107)

INIT

Selects the analog bus port.

Sets channel list.

Starts scanning cycle.

SCAN:PORT? [ROUTe:]SCAN:PORT? returns the current state of the analog bus port.

The command returns NONE if the analog bus connection control relays are

disabled or ABUS if the control relays are enabled.

Example Query Scan Port

This example selects the analog bus port, then queries the state. Because

the analog bus port is selected, the query command returns ABUS.

SCAN:PORT ABUS

SCAN:PORT?

Selects the analog bus port.

Query the port selection.

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SETTling[:TIME] [ROUTe:]SETTling[:TIME] <channel_list> sets the delay between receipt

of a channel closing trigger, and the pulse when the FET channel is closed.

You must specify one and only one channel for each card in the instrument

which has a channel in the channel list, and the <time> will then apply to all

channels on the card. The range is 1 to 32768 µsec.

Parameters

Parameter Name

time

Parameter Type

Numeric

Range of Values

1E-6 | 32768E-6 | MIN | MAX

only one channel

Numeric

channel_list

Comments

• Digital Bus Handshaking: This command allows a user-defined

settling time to allow a measurement to be made before the next

channel is closed.

• Related Commands: TRIGger:SOURce DBUS, TRIGger:SOURce

IMMediate

Example Setting 16 µsec SETTling TIME

TRIGger:SOUR DBUS

Triggering on the digital bus

handshake lines

SETTling:TIME 16E-6

Delay = l6µsec

SETTling[:TIME]? [ROUTe:]SETTling[:TIME]? [MIN | MAX] <channel_list> returns the

current setting for a specified channel. MIN or MAX returns the minimum

and maximum allowable settings.

Parameters

Parameter Name

MIN | MAX

Parameter Type

Numeric

Range of Values

MIN = 1 µsec, MAX = 32768 µsec

only one channel

Numeric

channel_list

Comments

• Returned value is given in exponential notation.

Example Set and Query the SETTling TIME

SETT:TIME 16E-6

SETT:TIME?

Sets delay = 16µsec.

Returns + 1.600000E-005.

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STATus

The STATus subsystem reports the bit values of the Operation Status

the Operation Status Register.

Subsystem Syntax

STATus

:OPERation

:ENABle <number>

[:EVENt]?

:OPERation:ENABle STATus:OPERation:ENABle <number> enables the Operation Status

bit 8 in the Operation Status Register is set to 1, bit 7 in the Status Register

is set to 1.

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

1 - 32768

number

Comments

• Setting Bit 7 of the Status Register: STATus:OPERation:ENABle

256 sets bit 7 of the Status Register to 1 after bit 8 of the Operation

Status Register is set to 1.

• Disabling STATus:OPERation: The STATus:PRESet command

disables the STATus:OPERation:ENABle command.

• Related Commands: [ROUTe:]SCAN, *SRE, *STB?, *SPOLL,

STATus:PRESet

Example Enable the Status Register Bit 7

STAT:OPER:ENAB 256

Enables bit 7 of the Status Register.

:OPERation[:EVENt]? STATus:OPERation[:EVENt]? returns the bit value of the Operation

Status Register (only bit 8 is used by the multiplexer modules).

Comments

• Setting Bit 8 of the Operation Status Register: Bit 8 (Scan

Complete) is set to 1 after a scanning cycle completes. Bit 8 returns

to 0 after sending the STATus:OPERation[:EVENt]? command. For

correct operation set to 0 by *CLS before scanning.

• Returned Data after sending the STATus:OPERation[:EVENt]?

Command: The command returns +256 if bit 8 of the Operation

Status Register is set to 1. The command returns +0 if bit 8 of the

Operation Status Register is set to 0.

• Related Commands: [ROUTe:]SCAN, *SRE, *STB?, *SPOLL

Example Reading the Operation Status Register after a Scanning Cycle

STAT:OPER?

Reads the register value

read and print the register value

+256 shows bit 8 is set to 1; +0

shows bit 8 is set to 0.

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SYSTem

The SYSTem subsystem returns the error numbers and error messages in

the error queue of a switchbox, and returns the types and descriptions of

modules (cards) in a switchbox.

Subsystem Syntax

SYSTem

:CDEScription? <number>

:CPON <number | ALL>

:CTYPe? <number>

:ERRor?

:CDEScription? SYSTem:CDEScription? <number> returns the description of a selected

module (card) in a switchbox.

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

1 - 99

number

Comments

• 16-Channel FET Multiplexer Module Description: The

SYSTem:CDEScription? <number> command returns:

16 Channel FET Mux

• 16-Channel Thermocouple FET Multiplexer Module Description:

The SYSTem:CDEScription? <number> command returns:

16 Channel FET Mux with T/C

Example Reading the Description of Card #1 Module

SYST:CDES? 1

Determine the description.

:CPON SYSTem:CPON <number | ALL> opens all channels of a selected module,

or all modules (cards) in a switchbox.

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

1 - 99 | ALL

number

Comments

• Differences between *RST and CPON: SYSTem:CPON only opens

all channels of a selected module or all modules in a switchbox.

*RST opens all channels of all modules in a switchbox and also sets

the trigger modes to the power-on states.

Example Opening All Channels on Card #1

SYST:CPON 1

Opens all channels on card #1.

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:CTYPe? SYSTem:CTYPe? <number> returns the module (card) type of a selected

module in a switchbox.

Parameters

Parameter Name

Parameter Type

Range of Values

Numeric

1 - 99

number

Comments

• 16-Channel FET Multiplexer Module Model Number:

The SYSTem:CTYPe? <number> command returns:

HEWLETT-PACKARD,E1351A,0,A.03.00

• 16-Channel Thermocouple FET Multiplexer Module Model Number:

The SYSTem:CTYPe? <number> command returns:

HEWLETT-PACKARD,E1353A,0,A.03.00

Note: The first number after the model number is the serial number

of the module (always 0); the module revision code follows the

serial number (for example, A.03.00).

Example Reading the Model Number of a Card #1 Module

SYST:CTYP? 1

Determine the model number.

:ERRor? SYSTem:ERRor? returns the error numbers and corresponding error

messages in the error queue of a switchbox. See Appendix C for a listing of

the switchbox error numbers and messages.

Comments

• Error Numbers/Messages in the Error Queue: Errors generated

by a switchbox stores an error number and corresponding error

message in the error queue. Each error message can be up to 255

characters long.

• Clearing the Error Queue: An error number/message is removed

from the queue each time the SYSTem:ERRor? command is sent.

The errors are cleared first-in, first-out. When the queue is empty,

each following SYSTem:ERRor? command returns 0, "No error".

To clear all error numbers/messages in the queue, execute the *CLS

command.

• Maximum Error Numbers/Messages in the Error Queue: The

queue holds a maximum of 30 error numbers/messages for each

switchbox. If the queue overflows, the last error number/message in

the queue is replaced by -350, "Too many errors". The least recent

error numbers/messages remain in the queue and the most recent are

discarded.

Example Reading the Error Queue

SYST:ERR?

Query the error queue.

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TRIGger

The TRIGger subsystem commands control the scan triggering operation of

the multiplexer modules.

Subsystem Syntax

TRIGger

[:IMMediate]

:SOURce BUS | DBUS | EXTernal | HOLD | IMMediate

:SOURce?

[:IMMediate] TRIGger[:IMMediate] causes a trigger to occur when the defined trigger

source is TRIGger:SOURce HOLD or TRIGger:SOURce BUS. Note that

TRIGger[:IMM] is not the same as TRIGger:SOURce IMM.

Comments

• Executing the TRIGger[:IMMediate] Command: A channel list

must be defined with the [ROUTe:]SCAN <channel_list> command

and an INITiate[:IMMediate] command must be executed before

TRIGger[:IMMediate] can trigger the switchbox.

• HOLD or BUS Source Remains: If selected, the TRIGger:SOURce

HOLD or TRIGger:SOURce BUS commands remain in effect after

triggering the switchbox with the TRIGger[:IMMediate] command.

• Related Commands: INITiate, [ROUTe:]SCAN

Example Advancing Scan using the TRIGger Command

TRIG:SOUR HOLD

SCAN (@100:115)

INIT

Sets trigger source to hold.

Sets channel list.

Starts scanning cycle.

Start count loop.

loop statement

TRIG

Advances scan to next channel.

Increment count loop.

increment loop

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:SOURce TRIGger:SOURce BUS | DBUS | EXTernal | HOLD | IMMediate specifies

the trigger source to advance the channel list during scanning.

Parameters

Parameter Name

BUS

Parameter Type

Discrete

Range of Values

*TRG command

Digital Bus

DBUS

Discrete

EXTernal

HOLD

Discrete

Event In port

Discrete

Hold Triggering

Continuous Triggering

IMMediate

Discrete

Comments

• Enabling the Trigger Source: The TRIGger:SOURce command

only selects the trigger source. The INITiate[:IMMediate] command

enables the trigger source.

• Using the TRIG Command: You can use TRIGger[:IMMediate] to

advance the scan when TRIGger:SOURce BUS or TRIGger:SOURce

HOLD is selected.

• Using Digital Bus Trigger: TRIGger:SOURce DBUS selects the

digital bus on the multiplexer as the trigger. Any open collector TTL

trigger source can be wired to the "Channel Advance" lead. A

negative-going pulse triggers the multiplexer and advances it to the

next channel on the scanning list. After the SETTling:TIME delay,

the multiplexer asserts "Channel Closed" on the digital bus.

• Using External Trigger Inputs: With TRIGger:SOURce EXTernal

selected, only one switchbox at a time can use the external trigger

input at the HP E1300A/E1301A Mainframe’s "Event In" port. The

trigger input is assigned to the first switchbox requesting the external

trigger source.

• Assigning External Trigger: A switchbox assigned with

TRIG:SOUR EXT remains assigned to that source until the switchbox

receives a command to change the source. When the source is

changed, the external trigger source is available to another switchbox

(with a TRIGger:SOURce EXTernal command). Another switchbox

cannot receive an external trigger source if the source is already

assigned, or an error is generated.

• Using Bus Triggers: To trigger the switchbox with

TRIGger:SOURce BUS selected, use TRIGger[:IMMediate], the IEEE

488.2 common command *TRG or the HP-IB Group Execute Trigger

(GET).

• "Trig Out" Port Shared by Switchboxes: See the OUTPut

command.

• Related Commands: ABORt, [ROUTe:]SCAN, SETTling[:TIME],

TRIGger

• *RST Condition: TRIGger:SOURce IMMediate

74 HP E1351A/53A 16-Channel FET Multiplexer Command Reference

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Example Scanning Using External Triggers

In the following example, the trigger input is applied to the HP

E1300A/E1301A Mainframe’s "Event In" port.

TRIG:SOUR EXT

SCAN (@100:115)

INIT

Sets trigger source to external.

Sets channel list.

Starts scanning cycle.

Advances scan to next channel.

trigger externally

Scanning Using Bus Triggers

TRIG:SOUR BUS

SCAN (@100:115)

INIT

Sets interface (bus) triggering.

Sets channel list.

Starts scanning cycle.

Advances channel list.

*TRG

:SOURce? TRIGger:SOURce? returns the current trigger source for the switchbox.

Command returns either BUS, DBUS, EXT, HOLD, or IMM for trigger

sources BUS, DBUS, EXTernal, HOLD, or IMMediate, respectively.

Example Query Trigger Source

TRIG:SOUR EXT

TRIG:SOUR?

Sets trigger source to external.

Query trigger source; returns

"EXT".

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IEEE 488.2 Common Commands

The following table lists the IEEE 488.2 Common (*) Commands that the

16-Channel FET Multiplexer Modules accept. The operation of some of

these commands is described in Chapter 4 of this manual. For more

information on Common Commands, refer to the HP 75000 Series B

Mainframe User’s Manual (HP Model Number E1300/E1301) or the

ANSI/IEEE Standard 488.2-1987.

Command

*IDN?

Title

Description

Identification

Reset

Returns identification string of the switchbox.

*RST

Opens all channels, and invalidates current channel list for

scanning. Sets ARM:COUN1, TRIG:SOURIMM, and INIT:CONT OFF.

*TST?

Self-Test

Power-on interrupt returns +110

Incorrect MFR ID or model code returns +103

Test pass returns 0.

*OPC

Operation Complete

See note below.

*OPC?

Operation Complete Query

Wait to Complete

Clear status

See note below.

*WAI

*CLS

See note below.

Clears all status registers (see STATus:OPERation[:EVENt]?).

*ESE

*ESE?

Event status enable

Event status enable query

See note below.

*ESR?

Event status register query

Service request enable

See note below.

*SRE

*SRE?

Enables status register bits (see Chapter 4 for operation).

Service request enable query See note below.

*STB?

*TRG

Read status byte query

Trigger

See note below.

Triggers the switchbox to advance the scan when scan is enabled

and trigger source is TRIGger:SOURce BUS | HOLD.

*RCL

*SAV

Recall instrument state

Store instrument state

See note below.

Note: These commands apply to many instruments and are not documented in detail here. See the HP 75000

Series B E1300/E1301 Mainframe User’s Manual or the ANSI/IEEE Standard 488.2-1987 for more information.

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Command Quick Reference

The following tables summarize SCPI and IEEE 488.2 Common (*)

Commands for the 16-Channel FET Multiplexer Modules.

SCPI Commands Quick Reference

Description

Command

ABORt

ARM

Abort a scan in progress.

:COUNt <number> MIN | MAX

:COUNt? [MIN | MAX]

Multiple scans per INIT command.

Query number of scans.

Selects module to be monitored.

Selects monitor mode.

DISPlay :MONitor:CARD <number> | AUTO

:MONitor[:STATe] <mode>

Enables/disables continuous scanning.

Query mode.

Starts a scanning cycle.

INITiate :CONTinuous <mode>

:CONTinuous?

[:IMMediate]

Enables/disables "Trig Out" pulse.

Query state of trig out pulse.

OUTPut [:STATe] <state>

[:STATe]?

Close channel(s).

Query channel(s) closed.

Open channel(s).

Query channel(s) opened.

Define channels for scanning.

Selects appropriate tree Isolation switches for measurements.

Query state of scan mode.

Enables tree isolation switches closure as part of a

measurement.

Query analog bus state.

Sets delay between trigger pulse and channel closed pulse.

Returns current parameter in SETTling[:TIME].

[ROUTe:] CLOSe <channel _list>

CLOSe? <channel _list>

OPEN <channel _list>

OPEN? <channel _list>

SCAN <channel _list>

SCAN:MODE NONE | VOLT | RES | FRES

SCAN:MODE?

SCAN:PORT NONE | ABUS

SCAN:PORT?

SETTling[:TIME] <channel_list>

SETTling[:TIME]? [MIN | MAX] <channel_list>

STATus :OPERation:ENABle

:OPERation[:EVENt]?

Enables the Operation Status Register to set a bit in the

Status Register.

Returns status of Operation Status Register.

Returns description of module in a switchbox.

Sets specified module to its power-on state.

Returns the module type.

SYSTem :CDEScription? <number>

:CPON <number> | ALL

:CTYPe? <number>

Returns error number/message in a switchbox error queue.

:ERRor?

TRIGger [:IMMediate]

:SOURce BUS

Causes a trigger to occur.

Trigger source is *TRG.

Trigger source is Digital Bus.

Trigger source is "Event In" port.

Hold off triggering.

Continuous (internal) triggers.

Query scan trigger source.

:SOURce DBUS

:SOURce EXTernal

:SOURce HOLD

:SOURce IMMediate

:SOURce?

IEEE 488.2 Common Commands Quick Reference

Command

Title

Description

*RST

Reset

Opens all channels and invalidates current channel list for scanning.

Sets ARM:COUN 1, TRIG:SOUR IMM, and INIT:CONT OFF.

*TRG

Bus Trigger

Self-Test

When scan is enabled and trigger source is TRIG:SOUR BUS, use the *TRG

command to trigger the switchbox to advance the scan.

*TST?

Power on interrupt returns +110.

Incorrect MFR ID or model code returns +103.

Test pass returns 0.

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Notes

78 HP E1351A/53A 16-Channel FET Multiplexer Command Reference

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Appendix A

HP E1351A/53A FET Multiplexer

Specifications

Maximum Voltage:

Screw Terminal Wire Size:

Watts/Slot: 1

Terminal to Chassis: ±16V peak*

(input impedance less above 14V

peak)

16 AWG Max, 26 AWG Min

Cooling/Slot:

Module Size/Device Type:

0.02 mm H O @ 0.10 liter/sec

B, register-based

Maximum Current per Channel:

1 mA (non-inductive)

Humidity: 65% 0° to 40°C

Connectors Used: P1

Number of Slots: 1

Operating Temperature:

0° to 55°C

Maximum Offset Voltage:

25 µV (0° to 28°C)

250 µV (28° to 55°C)

Interrupt Level: selectable

Storage Temperature:

-40° to 75°C

Input Impedance:

Power Requirements:

Power On (Vin <±10V)

Voltage:

+5V

+12V

0.13

EMC, RFI, Safety:

meets FTZ 1046/1984, CSA 556B,

IEC 348, UL 1244

High to Low: >10 Ω

Peak module

current, IPM (A): 0.20

Dynamic module

High or Low to Chassis: >10 Ω

Guard to Chassis: 10 kΩ ±10%

Capacitance:

current, IDM (A): 0.01

0.01

Net Weight (kg): 0.9

High or Low to Chassis: <200pf

High to Low: <200pf

Strain Gage Excitation:

+ 4.63V ±10%

Max Current: 400mA

(short circuit protected)

Power Off (High to Low):

for Vin ≤14V: 1000Ω

for Vin >14V: 220Ω

Reference Junction Measurement

Accuracy (HP E1353A only): 0.3°C

(over 18° to 28°C operating temperature)

Closed Channel Resistance:

<3.1 kΩ for high or low input

(Guard not switched)

Bandwidth (-3dB):

50Ω source, 1 MΩ | |10pF

termination: >200 kHz

* Each FET is diode clamped to ±14V and a 220Ω series resistor.

This limits the current to the clamp diodes.

Appendix A

HP E1351A/53A FET Multiplexer Specifications 79

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Notes

80 HP E1351A/53A FET Multiplexer Specifications

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Appendix B

HP E1351A/53A Register-Based

Programming

About This Appendix

The HP E1351A and HP E1353A FET and Thermocouple FET

Multiplexers are register-based modules which do not support the VXIbus

word serial protocol. When a SCPI command is sent to the multiplexer, the

HP E1406A Command Module (Series C) or HP E1300A/E1301A

Mainframe (Series B) parses the command and programs the multiplexer at

the register level.

multiplexer registers. This increases throughput speed since it eliminates

command parsing and allows the use of an embedded controller. Also, if

slot 0, the resource manager, and the computer (HP-IB) interface are

provided by other devices, a C-size system can be downsized by removing

the command module.

This appendix contains the information you need for register-based

programming. The contents include:

• Register Addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 81

• Register Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 84

• Register Bit Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 86

• Executing Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 90

• Register-Based Programming for Maximum

Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 93

of VXIbus A16 address space. Every VXIbus device (up to 256 devices) is

allocated a 32 word (64 byte) block of addresses. The HP E1351A/E1353A

multiplexers use eight two-byte registers of the 64 addresses (32 word

registers) allocated.

Figure B-1 shows the register address location within A16 as it might be

mapped by an embedded controller. Figure B-2 shows the location of A16

address space in the HP E1300A/E1301A Mainframe and HP E1405/06A

Command Module.

Appendix B

HP E1351A/53A Register-Based Programming 81

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Figure B-1. Multiplexer Registers within A16 Address Space

Figure B-2. Registers within HP E1301/E1406 A16 Address Space

82 HP E1351A/53A Register-Based Programming

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The Base Address When reading or writing to a multiplexer register, specify a hexadecimal or

decimal register address. This address consists of a base address plus a

A16 address space is outside or inside the HP E1405A/E1406A Command

Module or HP E1300A/E1301A Mainframe.

A16 Address Space When the command module or mainframe is not part of your VXIbus

system (Figure B-1), the multiplexer’s base address is computed as:*

Outside the

Command Module

C000₁₆+ (LADDR * 64)₁₆

or Mainframe

49,152 + (LADDR * 64)

where C000 (49,152) is the starting location of the register addresses,

LADDR is the multiplexer’s logical address, and 64 is the number of

address bytes per VXIbus device. For example, the multiplexer’s factory

set logical address is 112. With this address, the multiplexer has a base

address:

C000₁₆+ (112 * 64)₁₆

C000₁₆+ 1C00₁₆= DC00₁₆

or (decimal)

49,152 + (112 * 64)

49,152 + 7,168 = 56,320

A16 Address Space When the A16 address space is inside the command module or mainframe

(Figure B-2), the multiplexer’s base address is computed as:

Inside the

Command Module

1FC000₁₆+ (LADDR * 64)₁₆

or Mainframe

2,080,768 + (LADDR * 64)

where 1FC000 (2,080,768) is the starting location of the VXI A16

addresses, LADDR is the multiplexer’s logical address, and 64 is the

number of address bytes per register-based device. Again, the multiplexer’s

factory set logical address is 112. If this address is not changed, the

multiplexer will have a base address of:

1FC000₁₆+ (112 * 64)₁₆

1FC000₁₆+ 1C00₁₆= 1FDC00₁₆

2,080,768 + (112 * 64)

2,080,768 + 7,168 = 2,087,936

* The "16" at the end of the address indicates a hexadecimal number.

Appendix B

HP E1351A/53A Register-Based Programming 83

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For example, with a LADDR of 112 the multiplexer’s Scan Channel Delay

the offset is added to the base address to form the register address:

DC0016 + 0816 = DC08₁₆

(A16 outside the command module)

1FDC00₁₆+ 08₁₆= 1FDC08₁₆(A16 inside the command module)

56,320 + 8 = 56,328

(A16 outside the command module)

(A16 inside the command module)

2,087,936 + 8 = 2,087,944

There are six WRITE and two READ-only registers on the multiplexer.

You can READ-back three of the WRITE registers. This section contains a

description and a bit map of each register. Note that the bit names with an *

after them are True (asserted) when low (zero). An X represents a "do not

care" situation and a 1 always represents 1.

WRITE Registers The following WRITE registers are located on the multiplexer:

• Status/Control Register (base + 04 )

• Scan Control Register (base + 06 )

• Scan Channel Delay Register (base + 08 )

• Scan Channel Configuration Register (base + 0A )

• Direct Channel Configuration Register (base + 0C )

• Direct Control Register (base + 0E )

READ Registers There are two READ-only registers and three READ-back registers.

• Manufacturer ID Register (base + 00 ) READ-only

• Device Type Register (base + 02 ) READ-only

• Status/Control Register (base + 04 )

• Scan Control Register (base + 06 )

• Scan Channel Delay Register (base + 08 )

Manufacturer ID Register

base + 00₁₆

Write

Undefined

Read

Device

Class

Address

Space

Manufacturer ID

84 HP E1351A/53A Register-Based Programming

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Device Type Register

base + 02₁₆

Write

Undefined

Read

Model Code

Status/Control Register

base + 04₁₆

Write

Undefined

TRG DIR IRQ

INT

CRD

RST

Read

Undefined

BSY*

IRQ* IRQ

EN*

Scan Control Register

base + 06₁₆

Write

Undefined

RST CNT IMM DBS CLR

PTR EN EN EN SCN

Read

Undefined

CNT IMM DBS CLR

EN SCN

Scan Channel Delay Register

base + 08₁₆

Write

Undefined

Read

Scan Channel Configuration Register

base + 0A₁₆15

Write

Read

VLD* A_D* B_D* C1

Undefined

Direct Channel Configuration Register

base + 0C₁₆15

Write

Undefined

Read

Undefined

Direct Control Register

base + 0E₁₆15

Write

Undefined

VLD* A_D* B_D* C1

Read

Undefined

Appendix B

HP E1351A/53A Register-Based Programming 85

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This section contains a description of the function of each bit which is

addressable in each register. The bits are listed according to the title of the

WRITE bit name, with the READ definition at the end of the description.

For registers 00 and 02 , the bits are listed according to the title of the

READ definition.

Manufacturer ID The 16-Channel FET Multiplexer Module always returns FFFF on a

Manufacturer ID Register READ.

base + 00₁₆

Write

Undefined

Read

Device Class There are four classifications. The FET Multiplexer Module is a

Address Space The FET Multiplexer Module uses A16 address mode.

Manufacturer ID Hewlett-Packard’s identification number is 4095, which corresponds to bits

11 - 0 all set to 1.

Device Type The Device Type Register contains a model code which identifies the

module.

base + 02₁₆

Write

Undefined

Read

Model Code

Model Code Model Code. The following model codes identify the HP E1351A FET

Multiplexer and HP E1353A Thermocouple FET Multiplexer:

FF10 HP E1351A 16-Channel FET Multiplexer

FF12 HP E1353A 16-Channel Thermocouple FET Multiplexer

86 HP E1351A/53A Register-Based Programming

Appendix B

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Status/Control The Status/Control WRITE register is used to reset the module, enable

interrupts, choose direct or scan list control of the channels and to internally

trigger channel closing. The READ register indicates if interrupts are

enabled, if there is an interrupt and if the module is busy.

base + 04₁₆

Write

Undefined

TRIG DIR IRQ

INT

CRD

RST

Read

Undefined

BSY*

IRQ* IRQ

EN*

Card Reset (CRD RST) Writing a one (1) to bit 0 resets the multiplexer. Writing a zero turns the

reset function off. You must write a zero after a reset or the module will not

operate. The Reset conditions are: all Enables are set false, clear scan list,

scan mode enabled (direct bit set 0), DELAY is l µsec and all channels

opened.

Interrupt Request Writing a one (1) enables the card to generate interrupts, a zero (0) disables

it. Enabling this bit puts a zero (0) in IRQ EN*.

Enable (IRQ EN)

Direct (DIR) Selects between direct control and scan list control. A zero (0) indicates

scan list control and a one (1) indicates direct control. For scan list control

the Direct Registers (base + 0C, base + 0E) are invalidated. For direct

control the Scan Channel Configuration Register is invalidated.

Trigger Internal Writing a one (1) immediately advances a channel on the scan list, a zero

(0) is the idle state. Bit is automatically set back to zero (0) upon channel

advance.

(TRG INT)

Interrupt Request Reading a zero (0) indicates enabled, reading a one (1) indicates disabled.

Enable (IRQ EN*)

Interrupt Request (IRQ*) Reading a zero (0) indicates an interrupt, a one (1) indicates no interrupt.

This bit remains one (1) if IRQ EN is disabled. Interrupt remains set until

Card Reset or interrupt has been acknowledged.

Busy (BSY*) This bit is set zero (0) during channel closing and the delay period. Triggers

will not be accepted. BSY* is unasserted at the beginning of the Channel

Closed pulse. If a trigger occurs during the Channel Closed pulse, the pulse

is terminated and the channel is advanced. Operates only with downloaded

scan list (DIR is zero).

Appendix B

HP E1351A/53A Register-Based Programming 87

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Scan Control The Scan Control Register allows you to clear the scan list, set the trigger

mode and reset the pointer to the beginning of the scan list. This register is

a READ-back register, allowing you to verify the state of the WRITE

base + 06₁₆

Write

Undefined

RST CNT IMM DBS CLR

PTR EN EN EN SCN

Read

Undefined

CNT IMM DBS CLR

EN EN EN SCN

Clear Scan List Writing a one (1) in this bit clears the scan list. The bit must be set back to

zero (0) after flushing. CLR SCN (Read) returns the state of the bit.

(CLR SCN)

Digital Bus Enable Writing a one (1) enables the digital bus trigger mode. A zero (0) disables

it. DBS EN (Read) returns the state of the bit.

(DBS EN)

Immediate Enable Writing a one (1) in this bit sets trigger to immediate, which means that as

soon as the first channel is closed by the TRG INT, the entire scan list is run

without any further triggering. Channel advance speed is determined by the

delay time specified. This has extremely limited applications.

(IMM EN)

Continuous Enable Writing a one (1) in this bit enables the card to continually cycle through the

scan list. When this bit is enabled, the last channel in a scan list resets the

pointer back to the beginning of the scan list.

(CNT EN)

Reset Pointer Writing a one (1) resets the pointer back to the beginning of the scan list.

CNT EN true automatically resets pointer at end of scan list. If CNT EN is

set true, an interrupt also resets the pointer. If CNT EN is set false, the last

channel in the scan list generates an interrupt if the channel is valid (VLD*

set true).

(RST PTR)

Scan Channel The Scan Channel Delay Register sets the SETTling:TIME, the time between

receipt of a channel closing trigger and the Channel Closed pulse. The

Delay Register

delay is 2 µS and has a range of 0 to 15. D3 to D0 set , and D0 is the

least significant bit. This register is a read-back register, allowing you to

verify the state of the WRITE register.

base + 08₁₆

Write

Undefined

Read

D3 - D0 D0 is the least significant bit, D3 is the most significant. These bits

designate a number between 0 and 15 for .

88 HP E1351A/53A Register-Based Programming

Appendix B

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Scan Channel These bits set the <channel_list> for a scan list, set the type of measurement

and enable/disable the tree isolation switches. Note that the DIR in the

Status/Control Register must be set false to enable this register.

Configuration

base + 0A₁₆15

Write

Read

VLD* A_D* B_D* C1

Undefined

D3 - D0 These bits set the channel number, with a range of 0 - 15. Bit D0 is the least

significant bit, and bit D3 is the most significant.

Configuration Bit These bits determine the measurement mode as listed below:

(C1 - C0)

Volts

2-wire ohms

4-wire ohms

Thermistor

Note that to obtain the Thermistor reference temperature for Thermocouple

measurements, you must set the configuration bits for Thermistor. After

you have obtained the reference temperature, set the bits for Volts.

B and A Tree Isolation A zero in either one disables the respective Tree Isolation Switch.

Generally, both disabled together equal the [ROUTe:]SCAN:PORT NONE

command.

Switch Disable

(B-D*, A-D*)

Valid Channel (VLD*) A zero indicates that the specified channel is valid. When entering a scan

list the entire list must be loaded into each module. For the channels that

are not on that module, the VLD* must be set false. See [ROUTe:]SCAN in

the “Executing Commands” section in this Appendix.

Direct Channel The Direct Channel Register allows you to specify channels to be closed

individually. Note that the DIR bit in the Status/Control Register must be

set true for this register to be enabled.

Configuration

base + 0C₁₆15

Write

Undefined

Read

Undefined

D3 - D0 These data bits set the channel number with a range of 0 - 15. Bit D0 is the

least significant bit, and bit D3 is the most significant.

Appendix B

HP E1351A/53A Register-Based Programming 89

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Direct Control The Direct Control Register allows you to set the controls for individual

channels. Note that the DIR bit in the Status/Control Register must be set

true for this register to be enabled.

base + 0E₁₆15

Write

Undefined

VLD* A_D* B_D* C1

Read

Undefined

C1 - C0 These configuration bits determine the measurement mode as listed below:

Volts

2-wire ohms

4-wire ohms

Thermistor

Note that to obtain the Thermistor reference temperature for Thermocouple

measurements, you must set the configuration bits for Thermistor. After

you have obtained the reference temperature, set the bits for Volts.

B and A Tree Isolation A zero in either one disables the respective tree isolation switch. Generally,

both disabled together equal the [ROUTe:]SCAN:PORT NONE command.

Switch Disable

(B-D*, A-D*)

Valid Channel (VLD*) A zero indicates that the specified channel is valid. If DIR is valid and

INT EN is true, a WRITE to this register will generate an interrupt.

Executing Commands

This command lists the SCPI commands and shows how to execute them

with register-based programming. For further information on register-based

programming see the HP E1326B Multimeter User’s Manual.

ABORt ABORt does not have an equivalent in register-based programming. This

command is executed from the front panel or over HP-IB.

ARM:COUNt The ARM:COUNt command does not have an equivalent in register-based

programming. To scan for a specified number of cycles, use the interrupt

generated at the end of the scan list to advance through a program loop for

the set number of cycles. For each pass through the loop, reset the pointer

to the beginning of the scan list. The IRQ EN in the Status/Control Register

must be enabled.

DISPlay:MONitor The DISPlay:MONitor[:STATe] command does not have an equivalent in

DISPlay:MONitor OFF.

INITiate INITiate:CONTinuous is equivalent to the CNT EN bit in the Scan Control

90 HP E1351A/53A Register-Based Programming

Appendix B

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INITiate[:IMMediate] is equivalent to writing a one to the TRG INT in the

Status/Control Register. The TRG INT sets itself back to zero after pulsing

the FET. If you have a multiple-module configuration and a downloaded

scan list, the module with the first channel on the scan list must be the last

one to receive the TRG INT. The scan cycle will start as soon as the card

with a valid channel receives TRG INT.

OUTPut The OUTPut[:STATe] command does not have an equivalent in

[ROUTe:] [ROUTe:]CLOSe <channel_list> is equivalent to the following:

• DIR in the Status/Control Register is enabled.

• D0 to D3 is set to a channel number in the Direct Channel

Configuration Register.

[ROUTe:]OPEN <channel_list> can be implemented by setting VLD* false

in either the Scan Channel Configuration Register or the Direct Control

toggling the DIR bit in the Status/Control Register.

For [ROUTe:]SCAN <channel_list>, the complete scan list must be loaded

in each module in a multiple-module configuration. The channel is set valid

if it is in that module, and invalid in the other modules. The channel list is

downloaded in the following way:

• Set CLR SCN in Scan Control Register to one, then back to zero, to

clear the previous scan list.

• DIR in the Status/Control Register is set to false.

• Channel number is set in D0 to D3 in the Scan Channel

Configuration Register.

The example below shows how to set a scan list for channels

(@100,101,200,201):

• Write to the Scan Channel Configuration Register on card 1:

VLD* true (0), 0000 to D3-D0

VLD* true (0), 0001 to D3-D0

VLD* false (1), XXXX to D3-D0

Sets channel 100.

Sets channel 101.

Reserves position in scan list for

channel 200.

VLD* false (1), XXXX to D3-D0

Reserves position in scan list for

channel 201.

• Write to the Scan Channel Configuration Register on card 2:

VLD* false (1), XXXX to D3-D0

Reserves position in scan list for

channel 100.

VLD* false (1), XXXX to D3-D0

Reserves position in scan list for

channel 101.

VLD* true (0), 0000 to D3-D0

VLD* true (0), 0001 to D3-D0

Sets channel 200.

Sets channel 201.

Appendix B

HP E1351A/53A Register-Based Programming 91

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The [ROUTe:]SCAN:MODE VOLT | RES | FRES is set with C1 and C0 in

the Scan Channel or Direct Control Register. Note that to obtain the

Thermistor reference temperature for Thermocouple measurements, you

must set the configuration bits for Thermistor. After you have obtained the

reference temperature, set the bits for Volts.

Volts

2-wire ohms

4-wire ohms

Thermistor

[ROUTe:]SCAN:PORT NONE | ABUS is set with A_D* and B_D* on the

Scan Channel Configuration or Direct Control Registers. Set both bits to

one for ABUS and to zero for NONE.

[ROUTe:]SETTling[:TIME] is set with the D3 to D0 bits in the Scan

n n

Channel Delay Register. The bits form a number ( is between 0 and 16),

and the delay is 2 µsec.

SYSTem SYSTem:CDEScription? is a READ on the Manufacturer ID Register.

SYSTem:CTYPe? is a READ on the Device Type Register.

SYSTem:CPON can be achieved by setting the DIR bit true in the

Status/Control Register and setting VLD* false. This opens all channels

without a card reset.

TRIGger TRIGger[:IMMediate] is equivalent to writing a one to TRG INT in the

Status Control Register. The register returns to zero after pulsing the

channel.

TRIGger:SOURce IMMediate and TRIGger:SOURce DBUS are executed

with the IMM EN and DBS EN bits in the Scan Control Register.

TRIGger:SOURce BUS and TRIGger:SOURce EXTernal are not

implemented at the register level. These commands both write to the TRG

INT bit when they are active and a trigger occurs.

TRIGger:SOURce HOLD is not implemented at the register level. It is in

the normal state when all trigger sources are disabled.

92 HP E1351A/53A Register-Based Programming

Appendix B

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This is an outline of the algorithm that needs to be followed to have the

HP E1326B 5¹⁄₂Digit Multimeter do high-speed scanning using the

HP E1351A 16-Channel FET Multiplexer. This procedure programs

the multimeter and downloads a scan list to the FET multiplexer so the

hardware controls the entire scanning process. The HP E1326B has several

things that should be understood when doing register programming.

1. Table B-1 on page 96 lists the multimeter’s commands. When doing

any of these commands, you are writing to registers which are read by the

multimeter’s voltmeter microprocessor. It is important to follow the

procedure in Figure B-3 on page 97 on how to send commands. This will

enable you to handshake with the E1326B microprocessor as you can easily

write commands faster than the processor can execute them.

2. In order to program the HP E1326B Multimeter to take readings with

the HP E1351A FET Multiplexer at its highest speed, do the commands

from Table B-1 on page 96. Note that all values in Table B-1 are specified

in decimal.

set the function

set the range

dcv

Note: You must have a fixed range to do 13k. Auto range will do 2.5k.

set the aperture 10 µsec

Note: This will cause readings to be returned as 16 bits.

set the auto zero

off or once

set offset Compensation

set trigger source

set trigger count

off

Immediate

set trigger delay

set Sample Count

This should be the total number of A/D readings that you will take

(for example, once through a 16 channel list = 16, 10 times through

a 16 channel list = 160).

set sample Source

This is the time between A/D readings.

set sample Period 76µs

76 µsec is the minimum or fastest A/D time.

set trigger arm armed

Timer

This arms the DVM to take all of the reading specified above.

Do not execute the next command yet. You still need to set the scan list in

the HP E1351A. Trigger immediate will start everything.

3. Now download the channel list to the HP E1351A

• Set CLR SCN in Scan Control Register to one, then back to zero in

order to clear the previous scan list.

• DIR in the Status/Control Register set to false.

Appendix B

HP E1351A/53A Register-Based Programming 93

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Now write once for each channel in your scan list to the Channel

Configuration Register. This register loads up a FIFO that will later rotate

each time the HP E1326B issues a VM complete on the digital bus. If you

have more than one FET multiplexer, you must load up the FIFOs on each

one. The VLD bit specifies if a channel is on this card. Note that you must

load the entire scan list to each HP E1351A FET Multiplexer, with only the

VLD bit being different. The FIFO, and hence the scan list, can be a

maximum of 512 channels.

i.e. VLD A_D B_D C0-C1

D0-D3

volts

Now, do the following to the HP E1351A:

write to register:

decimal code:

Select direct control.

Enable digital bus triggering

continuous scanning, pointer

to beginning of scan.

Control back to DVM.

Close first channel.

The HP E1351A FET Multiplexer is now ready. It will advance to the next

channel every time a VM complete is received.

VM complete is a output from the multimeter that always occurs after an

A/D reading is complete. The digital bus cable wires the VM Complete

from the voltmeter to the Channel Advance on the FET multiplexer card.

The above command (to reg 6 value 26) enables digital bus triggering,

which enables the FET Multiplexer to use this signal. Make sure that you

have both a analog bus cable and a digital bus cable connected.

4. To start everything, issue the Trigger Immediate command from

Table B-1 on page 96, to the HP E1326B.

94 HP E1351A/53A Register-Based Programming

Appendix B

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The number of readings specified in sample count will now be taken. If the

sample count is more than one scan, the scan list will start over again.

5. The voltmeter is now taking data which is being stored in the HP

E1326B hardware FIFO. With the 10 µsec aperture set, 512 16-bit readings

will collect here. In any other aperture only 256 32-bit readings will collect.

If you specified more than 512 readings, the computer needs to be removing

them from the FIFO while readings are being taken. The DVM FIFO is

connected to the HP E1326B VXI DATA BUFFER register.

To read the FIFO check the Data Ready bit in the Status Register to

determine if valid data is in the Data Buffer. Or, read the Data Buffer and

throw away any -1 readings, as a -1 decimal reading or all bits set to "1"

indicates invalid data. Keep reading the Data Buffer until you receive the

number of readings specified in Sample Count. Convert the readings from

voltmeter format to 32-bit real format.

6. To do debugging with the HP E1326B voltmeter, use the Query

Opcodes in Table B-1. This will verify that you have set the correct

parameters. Use the Send Error command (15) to get error codes back.

Refer to Table B-2 on page 98.

With the HP E1351A you cannot read back the contents in the FIFO,

therefore, debugging is difficult. Do verify that you get correct data back

from the Manufacturer ID Register and Device Type Register.

Appendix B

HP E1351A/53A Register-Based Programming 95

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Multimeter Table B-1 contains the multimeter command and parameter opcodes. The

opcodes used to query the parameter settings are also included.

Command and

Parameter Opcodes

Table B-1. Multimeter Command and Parameter Opcodes

Multimeter

Parameter

Command

Opcode

Parameter

Opcode

Value

Query

Opcode

Query

Response

Measurement

Function

DCV

ACV

parameter

opcode

(4-wire) OHMS

Range

125 mV / 256 Ω

1V / 2.048 kΩ

8V / 16.384 kΩ

64V / 131 kΩ

300V / 1.048 MΩ

Autorange

parameter

opcode

Aperture Time

267 ms

16.7 ms

320 ms

20 ms

2.5 ms

100 µs

10 µs

parameter

opcode

Autozero

parameter

opcode

Off

Once

Offset

Off

parameter

opcode

Compensation

Trigger Source

Immediate

External

Hold

TTL trigger lines

0 - 7

parameter

opcode

03 - 0A

Trigger Count

Trigger Delay

1 - 16,777,215

(1),(3)

24-bit unsigned

number

(2)

0 - 16.777215s

(1)

24-bit unsigned

number

(2)

Voltmeter

Complete Signal

Destination

8-bit binary number 0 - 7

(7)

8-bit binary number

(TTL trigger lines)

Sample Count

Sample Source

1 - 16,777,215

(1),(4)

24-bit unsigned

number

(2)

Immediate

Timer

Software

Control Register

parameter

opcode

Sample Period

(5)

76µs - 65.534ms

16-bit unsigned

number

(2)

(1)

Software Sample 35

(6)

—-

...

Trigger Arm

Un-armed

Armed

—-

Trigger Immediate 13

Send Error 15

—-

...

—-

Table B-1 Continued on Next Page

96 HP E1351A/53A Register-Based Programming

Appendix B

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Table B-1. Multimeter Command and Parameter Opcodes (continued)

(1) Specified as a 2’s complement binary number. For three byte parameters <upper byte> = value shifted 16 bits to the

right (>>16), <middle byte> = value shifted 8 bits to the right (>>8), <lower byte> = value. For two byte parameters

<upper byte> = value shifted 8 bits to the right (>>8), <lower byte> = value & 0xFF.

(2) Reading the Query Response register two times (16-bit number) or three times (24-bit number) returns in order; the

high byte, middle byte, and low byte.

(3) A parameter value of 0 sets infinite triggers per trigger arm.

(4) A parameter value of 0 sets infinite samples per trigger.

(5) Set when Sample Source is Timer.

(6) Used when Sample Source is Software. The first measurement of each burst occurs when the trigger signal is

received (e.g. Trigger Immediate). Subsequent measurements in the burst occur when Software Sample is written to the

Command register.

(7) Up to seven VXIbus TTLTrg trigger lines can be selected. 01 selects line 0, FF selects all lines.

Figure B-3. Configuring the Multimeter

Appendix B

HP E1351A/53A Register-Based Programming 97

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Multimeter Multimeter error codes related to register-based programming are listed in

Table B-2.

Programming Error

Codes

Table B-2. Multimeter Register-Based Programming Error Codes

Error Code

00₁₆

Cause

No error has occurred since the last error code was read.

Unrecognized command opcode.

01₁₆

02₁₆

A parameter was required but a command was received.

A parameter is invalid or out of range for the specified command.

03₁₆

04₁₆

Reading overrun. The data buffer is full and another measurement is taken.

This error also occurs when a new command (opcode) is received while the

multimeter is placing a reading in the data buffer. Trigger Arm is disabled.

05₁₆

The command or parameter received is not allowed in the two byte reading

mode (10 µs aperture time).

0C₁₆

0E₁₆

0F₁₆

Command is terminated by another command.

The aperture time is longer than the sample rate.

Input overload. A potentially damaging voltage has been applied to the

multimeter:

> +- 40V between HI and LO or HI and COMMON with the range <= 8V

> +- 40V between LO and COMMON on any range

Under this condition, the multimeter disconnects itself from the input.

A new range must be specified to restore operation.

98 HP E1351A/53A Register-Based Programming

Appendix B

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Appendix C

HP E1351A/53A FET Multiplexer Error

Messages

Table C-1 lists the error messages associated with the multiplexer modules

programmed with SCPI commands. See the HP E1406A Command Module

User’s Manual for complete information on error messages.

Table C-1. 16-Channel FET Multiplexer Error Messages

No.

Title

Potential Causes

–211

Trigger Ignored

Trigger received when scan not enabled. Trigger received after scan

complete. Trigger too fast.

–213

–224

1500

2000

2001

2006

INIT Ignored

Attempting to execute an INIT command when a scan is already in

progress.

Illegal Parameter Value

Attempting to execute a command with a parameter not applicable to the

command.

External Trigger Source Already Assigning an external trigger source to a switchbox when the trigger

Allocated

source has already been assigned to another switchbox.

Invalid Card Number

Addressing a module (card) in a switchbox that is not part of the

switchbox.

Invalid Channel Number

Attempting to address a channel of a module in a switchbox that is not

supported by the module (for example, ch. 99 of multiplexer module).

Command Not Supported On

This Card

Sending a command to a module (card) in a switchbox that is

unsupported by the module.

2008

2009

Scan List Not Initialized

Executing a Scan without the INIT command.

Too Many Channels in Channel Attempting to address more channels than available in the switchbox.

List

2010

Scan Mode Not Allowed On

Thi Card.

Attempting to execute a SCAN:MODE which is not supported.

2011

2012

Empty Channel List

No valid channels in <channel_list>.

Invalid Channel Range

Invalid channel(s) specified in SCAN <channel_list> command.

Attempting to begin scanning when no valid channel list is defined.

2017

2600

2601

Incorrect ARM:COUNt

Attempting to run a downloaded scan list with ARM:COUNt set to value

other than 1.

Function Not Supported On

This Card

Sending a command to a module (card) in a switchbox that is not

supported by the module or switchbox.

Channel List Required

Sending a command requiring a channel list without the channel list.

Appendix C

HP E1351A/53A FET Multiplexer Error Messages 99

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Notes

100 HP E1351A/53A FET Multiplexer Error Messages

Appendix C

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Index

HP E1351A/53A FET Multiplexer User’s Manual

ARM Subsystem, 57, 77

ARM:COUNt, 39, 57, 90

ARM:COUNt?, 57

Attenuator Configuration, 23

*CLS, 76

*ESE, 76

*ESE?, 76

*ESR?, 76

*IDN?, 76

*OPC, 76

Backplane

triggering, 15

*OPC?, 76

*RCL, 76

Bank

common, 12

*RST, 76 - 77

*SAV, 76

isolating, 32

one (1), 12, 32

*SRE, 52, 76

*SRE?, 76

*STB?, 52, 76

*TRG, 76 - 77

*TST?, 76 - 77

*WAI, 76

zero (0), 12, 32

Base Address, 83

Bit Map

descriptions, register, 86

device type register, 85 - 86

direct channel configuration register, 85, 89

direct control register, 85, 90

manufacturer ID register, 84, 86

scan channel configuration register, 85, 89

scan channel delay register, 85, 88

scan control register, 85, 88

status/control register, 85, 87

Block Diagram, 13

A16 Address Space, 81 - 82

Abbreviated Commands, 54

ABORt, 90

ABORt Command, 56, 77

Adding Components, 23

Address

Boolean Command Parameters, 55

A16 address space, 81

base, 83

channel, 30

Cables

LADDR, 19

logical, 14, 18 - 19

mainframe, 14

multiple-module switchbox, 18

primary, 14

analog bus, 26 - 27, 42

custom, 15 - 16, 26

digital bus, 15, 26 - 27, 42

ribbon, 12

shielded, 24

registers, 81 - 82

Card ID Switch, 21

Card Numbers, 18 - 19, 30

multiple-module switchbox, 18

scanning voltmeter, 18 - 19

single-module switchbox, 18

CAUTIONS, 17

scanning voltmeter, 15, 18 - 19

secondary, 14, 18

single-module switchbox, 18

switch, setting, 19

switchbox, 14, 18

Advancing the Channel List, 36, 45

Analog Bus

Certification, 5

Channel

cable, 26 - 27

address, 30

cables, 42

connector, 12, 26 - 27

port, 68

advance triggering, 12, 15

advancing, 36

closing, 16, 29, 33 - 35, 63

HP E1351A/53A FET Multiplexer User’s Manual Index 101

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Component Assembly, description, 11

Configuring

HP E1351A/53A module, 17 - 28

scanning voltmeter, 42

Conformity, declaration, 7

Connecting

connecting to direct terminals, 32 - 33

connecting to tree terminals, 34

list, 29, 65

numbers, 11

opening, 29, 64

query closure, 64 - 65

scanning, 65

scanning a range of, 36 - 37

scanning switchbox, 45, 66

selecting, 29

analog bus cables, 42

channels to direct terminals, 32 - 33

channels to tree terminals, 35

digital bus cables, 42

field wiring, 24

Closing

mainframe to multimeter, 38

multimeter to mainframe, 38

multimeters, 26 - 27, 34

multiple modules together, 12

signal generators, 26

bank 0 channels, 32

bank 1 channels, 32

channels, 16, 29, 33 - 35, 63

FETs, 34, 69

tree isolation switches, 12, 68

stand-alone multimeters, 12, 26

switchbox channels to tree terminals, 34

user inputs, 22

*CLS, 76

Command Reference, 53 - 78

Commands

Connections

abbreviated, 54

IEEE 488.2, 53, 76

implied, 54

analog bus, 12

multimeter, 12, 34

scanning voltmeter, 14

terminal module, 12, 24

tree terminals, 12

keyword, 54

linking, 55

optional, 54

Connector

optional parameters, 55

parameters, 55

quick reference, 77

scanning switchbox channels, 45 - 46

SCPI, 53

SCPI format, 53

separator, 54

types, 53

analog bus, 26 - 27

digital bus, 26 - 27

pin-out diagram, 22

Continuous Scans, 39, 60

Converting

thermistor resistance to a temperature, 44

thermistor temperature to a voltage, 44

Current

maximum allowed, 17, 79

shunt configuration, 23

Custom Cables, 15 - 16, 26

Comment sheet, reader, 9

Common

bank, 12

terminals, 12

Common (*) Commands, 53

*CLS, 76

*ESE, 76

*ESR?, 76

format, 53

Declaration of conformity, 7

Description, 11

*IDN?, 76

list of, 76

Device Type Register, 85 - 86

Digital Bus, 15

*OPC, 76

cable, 15, 26 - 27

*OPC?, 76

cables, 42

quick reference, 77

*RCL, 76

ground, 15

handshake lines, 15

*RST, 76 - 77

*SAV, 76

handshaking, 69

port, 15

*SRE, 52, 76

*SRE?, 76

*STB?, 52, 76

*TRG, 76 - 77

*TST?, 76 - 77

*WAI, 76

triggering, 15 - 16, 50 - 51, 74

Direct Channel Configuration Register, 85, 89

Direct Control Register, 85, 90

Direct Terminals

connecting switchbox channels, 32 - 33

description of, 12

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isolating, 33

measurement accuracy, 33

Discrete Command Parameters, 55

DISPlay Subsystem, 58 - 59, 77

DISPlay:MONitor:CARD, 58

DISPlay:MONitor[:STATe], 59, 90

Documentation history, 6

Handshake Lines

multimeter, 36

High-speed

operation, 12

Downloading Scan List, 39 - 41, 65

scan rate, 36

scanning, 93

switching, 11 - 12

temperature measurements, 44

HP 3457A Digital Multimeter, 48 - 50, 66

HP E1326B Multimeter, 51

HP-IB

Errors

codes, register-based, 98

messages, 72, 99 - 100

numbers, 72, 99 - 100

queue, 72

*ESE, 76

group execute trigger (GET), 74

interface select code, 14

serial poll, 52

*ESE?, 76

service request (SRQ), 52

*ESR?, 76

Event In Port, 15, 45, 74

scanning with, 49

trigger input, 75

ID Register, 84, 86

Examples

*IDN?, 76

connecting channels to tree terminals, 35

making 2-wire ohms measurements by scanning, 38

making 4-wire ohms measurements by scanning, 38

making multiple scans, 39

making voltage measurements by scanning, 36 - 37

scan complete monitor, 52

scanning using "Trig Out" and "Event In" ports, 49

scanning using digital bus triggering, 50 - 51

scanning using scanning voltmeter, 51

scanning using stand-alone multimeter, 50

scanning with external instruments, 48

Executing Commands, 90

External

IEEE 488.2 Commands

See Common (*) Commands

Implied Commands, 54

Initial Operation, 16

INITiate Subsystem, 60 - 61, 77

INITiate:CONTinuous, 39, 60, 90

INITiate:CONTinuous?, 61

INITiate[:IMMediate], 61, 91

Interrupt Line, 20

IRQ Switch, 20

instruments, scanning with, 45, 48 - 50, 66

trigger inputs, 74

Keywords, rules for use, 54

trigger port, 48 - 50

triggering, 15

LADDR, 19

Linking Commands, 55

Logical Address, 14, 18 - 19

changing, 19

Field Wiring, 24

Format

factory setting, 19

common commands, 53

SCPI commands, 53

Four-wire Ohms Measurements, 35, 38, 67

Front Panel, 22

multiple-module switchbox, 18

scanning voltmeter, 18 - 19

single-module switchbox, 18

switch, setting, 19

Low-pass Filter Configuration, 23

Getting Started, 11 - 16

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scanning voltmeter, 42, 51

synchronize E1351A/53A to, 48 - 49

to mainframe connection, 38

Multiple

Mainframe Address, 14

Making

modules, 18 - 19, 30

scans, 39

SCPI commands, linking, 55

2-wire ohms measurements by scanning, 38

4-wire ohms measurements by scanning, 38

continuous scans, 39, 60

measurements, 34

multiple scans, 39

voltage measurements by scanning, 36 - 37

Manufacturer ID Register, 84, 86

Measurement Complete Port, 15

Measurements

Numeric Command Parameters, 55

2-wire ohms, 38, 67

Ohms Measurements, 35, 38

*OPC, 76

*OPC?, 76

Opcodes, multimeter, 96

Opening

4-wire ohms, 35, 38, 67

direct terminal accuracy, 33

high-speed temperature, 44

making, 34

temperature using thermocouples, 43 - 44

thermocouple compensated, 44

voltage, 34, 36 - 37

channels, 64

tree isolation switches, 32 - 33

Opening Channels, 29

Operation Status Register, 52, 70

bit value, 70

setting bit 8, 70

Optional

measuring

resistance of a thermistor, 43

signals on closed channel, 12

temperature using thermocouples, 43 - 44

thermocouple temperature using multimeter, 43 - 44

Model Codes, 86

command parameters, 55

commands, 54

Module

OUTPut Subsystem, 62, 77

OUTPut[:STATe], 62, 91

OUTPut[:STATe]?, 62

block diagram, 13

card numbers, 18 - 19, 30

configuring, 17 - 28

connecting multiple, 12

connecting to multimeter, 12, 26 - 27, 34, 42, 51

connector pin-out diagram, 22

description, 11

Parameters, 55

Pin-out Diagram, 22

error messages, 99 - 100

error numbers, 99 - 100

front panel, 22

Polling, Status Register, 52

Primary Address, 14

Program Examples

ID, 21

2-wire ohms measurements by scanning, 38

4-wire ohms measurements by scanning, 38

configuration commands required, 14

making continuous scans, 39

registers within A16 address, 82

secondary address, 14

specifications, 79 - 80

making multiple scans, 39

terminal, 11

Multimeter

scan complete monitoring, 52

scanning a switchbox, 40 - 41

scanning using "Trig Out" and "Event In" ports, 49

scanning using digital bus triggering, 50 - 51

scanning using external instruments, 66

scanning using scanning voltmeter, 51

scanning using stand-alone multimeter, 50

scanning with a multimeter, 42

scanning with a scan list, 41

command and parameter opcodes, 96

connecting, 26 - 27

connecting to, 34, 42, 51

connecting to multiplexer, 12

connection points, 12

digital bus port, 15

handshake lines, 36

high-speed scanning, 93

measuring thermocouple temperature, 43 - 44

primary address, 14

scanning with external instruments, 48

scanning without a scan list, 40

verify initial operation, 16

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ROUTe:CLOSe?, 33, 64

ROUTe:OPEN, 64, 91

ROUTe:OPEN?, 33, 65

ROUTe:SCAN, 65 - 66, 91

ROUTe:SCAN:MODE, 67, 92

FRES, 33, 38, 67

voltage measurements by scanning, 36 - 37

Programming

Programming Language, 16

NONE, 67

RES, 67

Query

VOLT, 67

channel closure, 16, 33, 64 - 65

error queue, 72

number of scanning cycles, 57

scan mode, 67

scan port, 68

scanning state, 61

settling time, 69

ROUTe:SCAN:MODE?, 67

ROUTe:SCAN:PORT, 33, 68, 92

ABUS, 12, 33 - 34, 38, 68, 92

NONE, 32 - 33, 68, 92

ROUTe:SCAN:PORT?, 68

ROUTe:SETTling[:TIME], 69, 92

ROUTe:SETTling[:TIME]?, 69

*RST, 76 - 77

trig out port state, 62

trigger sources, 75

Quick Reference

common commands, 77

SCPI commands, 77

Safety warnings, 6, 17

*SAV, 76

Scan Channel Configuration Register, 85, 89

Scan Channel Delay Register, 85, 88

Scan Complete Bit, 52

Range of Channels, 36 - 37

*RCL, 76

Scan Control Register, 85, 88

Scanning

READ Registers, 84

Reader comment sheet, 9

error codes, 98

executing commands, 90

for maximum speed, 93

maximum speed using HP E1326B, 93

Registers

channels, 65

commands used, 45 - 46

continuous cycles, 39, 60

cycles (ARM), 57

multiple cycles, 39

ohms measurements, 38

query state, 61

range of channels, 36 - 37

starting cycle, 61

steps to take, 39

addressing, 81 - 82

switchbox channels, 45

trigger sources, 45, 47, 74

using "Event In" ports, 49

using "Trig Out" ports, 49

using bus triggers, 75

bit descriptions, 86

descriptions, 84

device type, 85 - 86

direct channel configuration, 85, 89

direct control, 85, 90

ID, 84, 86

offset, 84

operation status, 52, 70

READ, 84

scan channel configuration, 85, 89

scan channel delay, 85, 88

scan control, 85, 88

status, 52, 70

using external triggers, 75

using scanning voltmeter configuration, 51

using stand-alone multimeters, 50

voltage measurements, 36 - 37

with downloaded scan list, 41

with external instruments, 45, 48

without downloaded scan list, 40

Scanning List

automatic downloading, 12

downloading, 39, 65

scanning with downloading, 41

scanning without downloading, 40

Scanning Voltmeter

status/control, 85, 87

within A16 address, 82

WRITE, 84

Ribbon Cable, 12

ROUTe: Subsystem, 63 - 69

ROUTe:CLOSe, 63, 91

analog bus connector, 12

HP E1351A/53A FET Multiplexer User’s Manual Index 105

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polling, 52

card numbering, 30

card numbers, 18 - 19

configuration, 12, 14, 51

configuration with multimeter, 42, 51

continuous scanning, 60

logical addresses, 18 - 19

setup, 15

STATus Subsystem, 70, 77

Status/Control Register, 85, 87

STATus:OPERation:ENABle, 52, 70

STATus:OPERation[:EVENt]?, 52, 70

*STB?, 52, 76

Switchbox

addressing, 14, 18

Schematic, simplified, 13

SCPI Commands, 53

abbreviated, 54

card numbering, 18, 30

channels to tree terminals, 34

commands for scanning, 45 - 46

configuration, 14

connecting channels to direct terminals, 32 - 33

continuous scanning, 60

description of, 14

ABORt, 56, 77

ARM subsystem, 57, 77

DISPlay subsystem, 58 - 59, 77

format used, 53

implied, 54

errors, 72

multiple scanning cycles, 39

resetting, 16

INITiate subsystem, 60 - 61, 77

linking, 55

long form, 54

scanning, 40 - 41

optional, 54

scanning channels, 45, 66

scanning range of channels, 36 - 37

secondary address, 14

setup, 14

optional parameters, 55

OUTPut subsystem, 62, 77

parameters, 55

quick reference, 77

Switches

reference, 55, 77

card ID, 21

interrupt line, 20

ROUTe: subsystem, 63 - 69

short form, 54

IRQ, 20

logical address, 19

tree isolation, 12, 32 - 34, 68

Switching Speeds, 11 - 12

Synchronize E1351A/53A to HP 3457A Multimeter,

48 - 49

STATus subsystem, 70, 77

SYSTem subsystem, 71 - 72, 77

TRIGger subsystem, 73 - 75, 77

Secondary Address, 14, 18

multiplexer, 14

switchbox, 14

SYSTem Subsystem, 71 - 72, 77

SYSTem:CDEScription?, 71, 92

SYSTem:CPON, 71, 92

SYSTem:CTYPe?, 72, 92

SYSTem:ERRor?, 72

Selecting

channels, 29

interrupt line number, 20

Service Request (SRQ), 52

Setting

address switch, 19

card ID switch, 21

interrupt line number switch, 20

scanning cycles, 57

Shielded Cables, 24

Shock Hazard, 17

Temperature Measurements, 43 - 44

Terminal Block

See Terminal Module

Signal

Terminal Module, 11

conditioning components, adding, 23

generators, connecting, 24, 26

measuring on a closed channel, 12

Specifications, 79 - 80

Speed

adding components to, 23

connections, 12, 24

direct terminals, description of, 12

thermocouple, 43

wiring guidelines, 24

See High-speed

wiring to, 25

*SRE, 52, 76

Thermistor, 43 - 44

*SRE?, 76

measure resistance of, 44

resistance, converting to a temperature, 44

temperature, converting to a voltage, 44

Thermocouple, 43

Standard Commands for Programmable Instruments

See SCPI Commands

Static Electricity, 17

Status Register, 52, 70

compensated measurements, 44

106 HP E1351A/53A FET Multiplexer User’s Manual Index

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terminal module (E1353A), 43

Tree Isolation Switch, 12

closing FETs, 34

disabling, 68

Voltage

enabling, 68

opening, 32 - 33

Tree Terminals

maximum allowed, 17, 79

measurement, 34, 36 - 37

Voltmeter Complete Port, 50

pulse output, 49

connecting to switchbox channels, 34

description of, 12

VXIbus

for 4-wire ohms measurement, 35

*TRG, 76 - 77

backplane, 15

instrument description, 14

Trig Out Port, 45, 48, 62

disabling, 62

enabling, 62

query state, 62

*WAI, 76

scanning with, 49

WARNINGS, 6, 17

Warranty, 5

Wiring

connecting field, 24

guidelines, 24

to terminal module, 25

WRITE Registers, 84

TRIGger Subsystem, 73 - 75, 77

TRIGger:SOURce, 45, 74 - 75

BUS, 36, 45, 74, 92

DBUS, 12, 15, 36, 39, 45, 74, 92

EXTernal, 36, 45, 74, 92

HOLD, 45, 74, 92

IMMediate, 12, 39, 74, 92

TRIGger:SOURce?, 75

TRIGger[:IMMediate], 45, 73, 92

Triggering, 15

channel advance, 12, 15

delay, 69

digital bus, 15 - 16, 50 - 51, 74

external inputs, 74

source, 12, 45, 47, 74

*TST?, 76 - 77

Two-wire Ohms Measurements, 38, 67

Understanding the HP E1351A/53A, 45 - 52

Using

bus triggers, 74 - 75

external trigger inputs, 74

external triggers, 75

HP 3457A multimeter, 48 - 50, 66

HP E1326B multimeter, 51

HP E1351/53A multiplexer, 29 - 44

scan complete bit, 52

scanning trigger sources, 45, 47

scanning voltmeter configuration, 51

stand-alone multimeters, 50

HP E1351A/53A FET Multiplexer User’s Manual Index 107

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