*TB 9-6625-1996-35
DEP ARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION P ROCEDURE F OR
F REQUENCY COUNTER
HEWLETT-P ACKARD
MODELS 5345A, 5345A/E28 AND 5345AOP T12
Headquarters, Department of the Army, Washington, DC
25 J une 2001
Approved for public release; distribution is unlimited
R E P OR TING OF E R R OR S AND R E COMME NDE D IMP R OVE ME NTS
You can help improve this publication. If you find any mistakes or if you know of a
way to improve the procedure, please let us know. Mail your letter or DA Form 2028
to: Commander, U. S. Army Aviation and Missile Command, ATTN: AMSAM-MMC-
MA-NP, Redstone Arsenal, AL 35898-5230. A reply will be furnished to you. You may
also send
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comments
electronically
to our
e-mail address:
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SECTION
I.
IDENTIFICATION AND DESCRIPTION
P a r a gr a p h
P a ge
Test instrument identification ............................
Forms, records, and reports ...............................
Calibration description .......................................
1
2
3
2
2
2
II.
EQUIPMENT IDENTIFICATION
Equipment required ...........................................
Accessories required ..........................................
4
5
3
3
III.
CALIBRATION PROCESS
Preliminary instructions ....................................
Equipment setup................................................
Time base stability.............................................
Sensitivity..........................................................
A12 Interface I/O................................................
Power supply .....................................................
Final procedure..................................................
6
7
8
4
4
5
6
8
9
10
11
12
9
12
__________
This bulletin supersedes TB 9-6625-1996-35, dated 13 November 1985.
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TB 9-6625-1996-35
SECTION II
EQUIP MENT REQUIREMENTS
4. Equ ip m en t Requ ir ed . Table 2 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287 or AN/GSM-705. Alternate items may be used by the
calibrating activity. The items selected must be verified to perform satisfactorily prior
to use and must bear evidence of current calibration. The equipment must meet or
exceed the minimum use specifications listed in table 2. The accuracies listed in table 2
provide a four -to-one ratio between the standard and TI.
5. Accessor ies R eq u ir ed . The accessories required for this calibration are common
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure. The following peculiar accessories are also required for this
calibration: Adapter, SMC jack to BNC plug, Hewlett-Packard Model 1250-0831;
Extender Boards, 10-terminal circuit board extenders (05345-60201 and 05345-60202);
and Extender Cable, Hewlett-Packard Model 05345-60205.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
AUTOTRANSFORMER
Range: 105 to 125 V ac
General Radio, Type
Accuracy: ±1%
W10MT3AS3 (7910809) or
Ridge, Model 9020A (9020A)
or Ridge, Model 9020F (9020F)
(SG-1288/G)
FUNCTION GENERATOR
Range: 10 Hz to 30 MHz
Amplitude: 0 to 40 mV rms
Accuracy: ±3% (±1.5 dB)
Range: 10 MHz
FREQUENCY DIFFERENCE
METER
3.7 to 12.4 GHz, Hewlett-
Packard, Model 537A
(7910718-2)
Resolution: 1 part in 10-10 per day
MULTIMETER
Range: -2 to +2 Vdc
Hewlett-Packard, Model
3458A (3458A)
Accuracy: ±0.000125%
Range: 0 to ± 15 V dc
Accuracy: ±0.03%
OSCILLOSCOPE
SIGNAL GENERATOR
Bandwidth: 100 MHz
Sensitivity: 50 mV/div
Sweep rate: 10 ns/div
Accuracy: ±3%
Range: 30 to 500 MHz
Amplitude: 0 to 40 mV rms
Accuracy: ±3% (±1.5 dB)
Frequency: 10 MHz
Tektronix, Type 2465BOPT46
(2465BOPT46)
(SG-1207/U)
TIME/FREQUENCY
WORKSTATION
Autek Systems Corp. Model
620 (MIS-38946)
Accuracy: 1.25 parts in 10-10 per day
3
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TB 9-6625-1996-35
SE CTION III
CALIBRATION P ROCESS
6. P r elim in a r y In str u ction s
a . The instruction outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b . Items of equipment used in this procedure are referenced within the text by
common name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d . Unless otherwise specified, all controls and control settings refer to the TI.
7. Equ ip m en t Setu p
WARNING
HIGH VOLTAGE is used or exposed during the performance
of this calibration. DEATH ON CONTACT may result if
personnel fail to observe safety precautions. REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a . Remove protective cover from TI only when necessary to make adjustments.
Replace cover after completing the adjustments.
b . Connect TI rear panel DIGITAL BUS 1.0 LOAD to controller GPIB0 (opt 12
only).
c. Connect TI to autotransformer, connect autotransformer to a 115 V ac source and
adjust for 115 V ac output.
d . Set P OWER switch to ON and allow at least 1 hour for stabilization. If TI has
been disconnected from line power for more than 24 hours, allow at least 24 hours for
warmup before beginning calibration.
e. Set TI rear panel INT STD/EXT STD switch to INT STD and INTERNAL/EXT
ARM/EXT GATE switch to INTERNAL (OPT 12 only).
f. Position controls as listed in (1) through (10) below:
(1) F UNCTION switch to FREQ A.
(2) GATE TIME switch to 100 m s .
(3) DISP LAY P OSITION switch to AUTO.
4
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TB 9-6625-1996-35
(4) SAMP LE RATE control fully ccw.
(5) CHANNEL A and B LEVEL controls to P RESET .
(6) CHANNEL A and B SLOP E switches to + (positive).
(7) CHANNEL A and B input impedance switches to 50 W.
(8) CHANNEL A and B ATTEN switches to X1.
(9) CHANNEL A and B AC -DC switches to DC.
(10) CH E CK-COM A-SEP switch to SEP .
8. Tim e Ba se St a b ilit y
a . P er for m a n ce Ch eck
(1) Connect time/frequency workstation OUTP UT 1 MHz to frequency difference
meter REF INP UT .
(2) Connect TI F REQ STD OUTP UT 10 MHz (rear panel) to frequency
difference meter SIG INP UT .
(3) Adjust A18 FREQ ADJ (fig. 1) for minimum difference indication on frequency
difference meter.
Figure 1. Test instrument - top view.
(4) Allow at least 24 hours for stabilization. Frequency difference meter
indication will remain within 5 parts in 10-10
.
(5) Adjust autotransformer output to 105 V and allow 15 minutes for
stabilization. Verify that TI oscillator drift is less than 1 part in 10-10
.
(6) Adjust autotransformer output to 125 V and allow 15 minutes for
stabilization. Verify that TI oscillator drift is less than 1 part in 10-10
.
(7) Adjust autotransformer output to 115 V.
b . Ad ju stm en ts . No further adjustments can be made.
5
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TB 9-6625-1996-35
9. Sen sit ivit y
a . P er for m a n ce Ch eck
(1) Set function generator as listed in (a) through (c) below:
(a) Ou tp u t Typ e to Un Ba la n ced 600
(b) Function to Sin e Wa ve .
(b) Frequency to 10 H z.
(c) Amplitude to 1 m V.
(2) Position TI controls as listed in (a) through (f) below:
(a) CHANNEL A LEVEL control to P RESET .
(b) CHANNEL A SLOPE switch to +.
(c) CHANNEL A 50W/1MW switch to 50W.
(d) CHANNEL A ATTEN X1/X10 switch to X1.
(e) CHANNEL A AC/DC switch to DC.
(f) CHECK/COM A/SEP switch to SEP .
(3) Connect TI CHANNEL A input to function generator F u n ction Ou tp u t
Un ba la n ced .
(4) Press the function generator En ter key to enable the knob, and slowly rotate
the function generator knob cw until TI display GATE light flashes and indication is
stable at approximately 10 Hz.
(5) Verify that the function generator indicates within limits specified in table 3.
If not perform b below.
(6) Repeat technique of 1 through (5) above for remaining settings listed in table
3.
Table 3. Sensitivity
Test
instrument
CHECK-COM Function generator/signal
Function generator/signal
generator indications
(£)
A-SEP switch
setting
SEP
generator frequency
setting
input
CHANNEL A
CHANNEL A
CHANNEL A
CHANNEL A
CHANNEL A1
CHANNEL A
CHANNEL A
CHANNEL A2
CHANNEL A
CHANNEL A
CHANNEL A
CHANNEL A1
CHANNEL A
CHANNEL A
10 Hz
0.071 VPP
0.071 VPP
0.071 VPP
0.071 VPP
SEP
10 kHz
SEP
100 kHz
SEP
1
MHz
SEP
SEP
SEP
COM A
COM A
COM A
COM A
COM A
COM A
COM A
10 MHz
100 MHz
500 MHz
10 Hz
10 kHz
100 kHz
0.025
VRMS
0.025 VRMS
0.025 VRMS
0.141 VPP
0.141 VPP
0.141 VPP
1
MHz
0.141 VPP
10 MHz
100 MHz
400 MHz
0.050 VRMS
0.050 VRMS
0.050 VRMS
1Substitute the signal generator for the function generator.
2Substitute the function generator for the signal generator.
6
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TB 9-6625-1996-35
b . Ad ju stm en ts
(1) Substitute signal generator for function generator.
(2) Connect signal generator RF OUTP UT connector to TI CHANNEL A input.
(3) Connect signal generator EXT REF INP UT connector (rear panel) to TI
F REQ STD OUTP UT 10 MHz connector (rear panel).
(4) Extend front panel display assembly using extender cable 05345-60205.
Disconnect CHAN A P1 caple from A9 J 1 CHA (CHAN B P2 cable to A9 J 2 CH B for
CHANNEL B ) and connect A9 J 1 CH A (A9 J 2 CH B for CHANNEL B ) to oscilloscope
CHANNEL A.
(5) Position TI CHANNEL A and CHANNEL B controls as listed in (a) through
(f) below:
(a) LEVEL control to P RESET.
(b) SLOP E switch to +.
(c) IMP EDANCE switch to 50W.
(d) ATTEN switch to X1.
(e) COUP LING switch to DC.
(f) CH E CK-COM A-SEP switch to SEP .
(6) Set signal generator frequency to 100 MHz and amplitude to 25 mV.
(7) Position oscilloscope controls as listed in (a) through (f) below:
(a) CH 1 VOLTS/DIV switch to .2 V.
(b) SE C/DIV switch to 20 n s .
(c) Pull delayed sweep switch and set to 10 n s .
(d) Set TRIGGER MODE pushbutton to AUTO.
(e) Set TRIGGER SOURCE pushbutton to VERT.
(f) Set TRIGGER C OUP LING pushbutton to DC.
(8) Adjust A3R41 (fig. 2)(A3R3 (fig. 2) for CHANNEL B ) for a symmetrical
waveform displayed on oscilloscope (R).
Figure 2. A3 input attenuator (cmponent side).
(9) While alternately setting CHANNEL A and CHANNEL B SLOPE switches
to (+) and (-), observe that waveform maintains its symmetrical form.
7
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TB 9-6625-1996-35
(10) Repeat (8) and (9) above as required to compensate for interaction.
(11) Disconnect oscilloscope and signal generator from TI, reinstall TI from panel,
and reconnect CHAN A P1 cable to A9 J 1 CH A and CHAN B P2 cable to A9 J 2 CH B.
(12) Replace TI covers.
10. A12 In ter fa ce I/O
a . P er for m a n ce Ch eck
NOTE
This option can only be calibrated in an automated mode.
The TI must be connected to a controller with a properly
configured GPIB IEEE interface card.
NOTE
If you are running this section with any controller and or
software other than the fielded controller and the ICE
environment, you will have to write the required mnemonics
and take reading as per the software that you are using.
(1) Connect TI and multimeter IEEE connectors to the controller GPIB0.
(2) Assure TI address is set to 2 and multimeter address is set to 12.
(3) Adjust TI CHANNEL A and CHANNEL B LEVEL controls to P RESET .
(4) Remove screws holding TI top cover. Do not remove top cover until
instructed.
(5) Press the RESET key on the multimeter.
(6) Output the following mnemonic string to the TI: I2B500A500I1.
(7) Con n ect m u lt im et er In pu t H I a n d L O t o TI r ea r p a n el C H AN A
T R I G L E VE L .
(8) Output the following mnemonic string to the TI: B500A000I1.
(9) Ret r ieve t h e r ea d in g fr om t h e m u lt im et er . I f t h e r ea d in g is n ot
wit h in lim it s list ed in t a ble 4, per for m t h e list ed a dju st m en t .
(10) Repeat technique of (7) through (9) above for remaining table 4 entries.
Table 4. A12 interface I/O.
Connect multimeter to
test instrument
rear panel connector
Multimeter indication
Output
mnemonic
Perform adjust
listed below
b 1
Min
-2.0005
Max
-1.9995
B500A000I1
CHAN A TRIG LEVEL
8
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TB 9-6625-1996-35
A:00I1
B000I1
B:00I1
CHAN A TRIG LEVEL
CHAN B TRIG LEVEL
CHAN B TRIG LEVEL
1.9995
-2.0005
1.9995
2.0005
-1.9995
2.0005
b 2
b 3
b 4
b . Ad ju stm en ts
NOTE
Remove top cover to make adjustments, then replace top
cover before repeating (a) above.
(1) Adjust A12 pot A (R69) (fig. 3) for a –2.0000 ± 0.0005 V dc multimeter
indication (R).
(2) Adjust A12 pot B (R74) (fig. 3) for a 2.0000 ± 0.0005 V dc multimeter indication
(R).
(3) Adjust A12 pot D (R86) (fig. 3) for a –2.0000 ± 0.0005 V dc multimeter
indication (R).
(4) Adjust A12 pot C (R82) (fig. 3) for a –2.0000 ± 0.0005 V dc multimeter
indication (R).
Figure 3. I/O adjustment location.
11. P ow er Su p p ly
NOTE
Do not perform power supply check if all other parameters
are within tolerance.
9
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TB 9-6625-1996-35
a . P er for m a n ce Ch eck
(1) Mount circuit board A6 (fig. 1) on extender boards.
(2) Connect multimeter between A6TP6 and + 5 V RET (fig. 4). If multimeter
does not indicate between 4.98 and 5.02 V dc, perform b (1) below.
(3) Connect multimeter between A6TP3 and - 5.2 V RET (fig. 4). If multimeter
does not indicate between -5.18 and -5.22 V, perform b (2) below.
(4) Replace circuit board A6 in TI and mount circuit board A7 (fig. 1) on extender
boards.
(5) Connect multimeter between A7TP1 (A7TP2; serial prefix 1428A and p r ior )
a n d + 15 RE T (fig. 4). If multimeter does n ot in dica t e bet ween 14.98 a n d 15.02
V, p er for m b (3) below.
(6) Connect multimeter between A7TP3 (A7TP7; serial prefix 1428A and p r ior )
a n d -15 V RE T (fig. 4). If multimeter d oes n ot in d ica t e bet ween -14.98 a n d -
15.02 V, per for m b (4) below.
b . Ad ju stm en ts
(1) Adjust R19 (fig. 4) for 5.00 V indication on multimeter (R).
(2) Adjust R29 (fig. 4) for 5.20 V indication on multimeter (R).
(3) Adjust R16 (fig. 4) (R18 (fig. 4); serial prefix 1428A and prior) for +15.00 V
indication on multimeter (R).
(4) Adjust R17 (fig. 4) (R24 (fig. 4); serial prefix 1428A and prior) for -15.00 V
indication on multimeter (R).
10
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TB 9-6625-1996-35
R18
R24
+15V
RET
TP7
TP2
A7 CIRCUIT BOARD S/N 1428A
-15V RET
TP3
R19
R29
+5V
RET
TP6
-5.2 V
RET
A6 CIRCUIT BOARD
R16
R17
TP3
TP1
-15V
RET
+15V RET
A7 CIRCUIT BOARD S/N 1808
Figure 4. Power supply circuit boards.
11
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TB 9-6625-1996-35
12. F in a l P r oced u r e
a . Deenergize and disconnect all equipment.
b . Annotate and affix DA label/form in accordance with TB 750-25.
12
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TB 9-6625-1996-35
By Or d er of t h e Secr et a r y of t h e Ar m y:
0116212
Distribution:
To be distributed in accordance with IDN 342172, requirements for calibration procedure
TB 9-6625-1996-35.
P IN: 046669-000
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