*TB 9-6625-2049-35
SUPERSEDED COPY DATED 15 J ANUARY 1996
DEP ARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION P ROCEDURE F OR
SYNTHESIZER/F UNCTION GENERATOR
HEWLETT-P ACKARD
MODELS 3325A( ) AND 3325B( )
Headquarters, Department of the Army, Washington, DC
2 J anuary 2001
Approved for public release; distribution is unlimited
REP ORTING OF ERRORS AND RECOMMENDED IMP ROVEMENTS
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-LS-LP, Redstone Arsenal, AL 35898-5230.
A reply will be furnished to you. You may also send in your comments
electronically to our e-mail address: ls-lp@redstone.army.mil or by FAX (256)
842-6546/DSN 788-6546
P a r a gr a p h
P a ge
SECTION
I.
IDENTIFICATION AND DESCRIPTION
Test instrument identification ............................
Forms, records, and reports................................
Calibration description .......................................
1
2
3
2
2
2
II.
III
EQUIPMENT REQUIREMENTS
Equipment required............................................
Accessories required ...........................................
4
5
4
5
CALIBRATION PROCESS
Preliminary instructions.....................................
Equipment setup.................................................
Harmonic distortion ............................................
Amplitude modulation distortion........................
Square wave characteristics ...............................
Ramp retrace.......................................................
Frequency accuracy ............................................
Phase increment .................................................
Sine wave amplitude and flatness ......................
Square wave amplitude and flatness..................
6
7
8
9
10
11
12
13
14
15
6
6
7
9
9
10
11
13
14
16
__________
*This bulletin supersedes TB 9-6625-2049-35, 15 J anuary 1996.
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TB 9-6625-2049-35
Table 1. Calibration Description
Performance specifications
Fundamental frequency: 0.1 Hz To 50 kHz
Test instrument parameters
Harmonic distortion1
(relative to fundamental at Accuracy: No harmonic greater than -65 dB
full output)
Fundamental frequency: 50 to 200 kHz
Accuracy: No harmonic greater than -60 dB
Fundamental frequency: 200 kHz to 2 MHz (200 kHz to 1 MHz
for option 002)
Accuracy: No harmonic greater than -40 dB
Fundamental frequency: 2 to 15 MHz
Accuracy: No harmonic greater than -30 dB
Fundamental frequency: 15 to 20 MHz
Accuracy: No harmonic greater than -25 dB
AM distortion: £-30 dB at 80% modulation, 10 kHz, and 0 V dc
offset
Amplitude modulation
Square wave
Rise time and fall time: £20 ns, (£125 ns for option 002) at full
output
Symmetry: £.02% of period +3 ns
Overshoot: £5% of p-p amplitude at full output (<10% of peak
amplitude for option 002)
Ramp retrace
Frequency
Sine wave
£3 ms retrace time, positive or negative ramps
Accuracy: 5 x 10-6 of selected value
Range: 1 mHz to 20 999 999.999 Hz
(option 002: .02 Hz to 25.6 kHz)
Range: 1 mHz to 10 999 999.999 Hz
(option 002: .02 Hz to 25.6 kHz)
Range: 1 mHz to 10 999 999.999 Hz
(option 002: .02 Hz to 10 kHz)
Square wave
Triangle
Positive slope ramp
Negative slope ramp
Phase offset
Range: 1 mHz to 10 999 999.999 Hz
(option 002: .02 Hz to 10 kHz)
Range: 1 mHz to 10 999 999.999 Hz
(option 002: .02 Hz to 10 kHz)
Range: Variable ±719.9° with respect to arbitrary starting
phase,
or assigned zero phase
Accuracy: ±0.2°
Tolerance relative to
Amplitude
programmed amplitude
Amplitude accuracy with no
attenuation (attenuator range 1)
into 50W load (no dc offset )
Sine wave: .001 Hz to 100 kHz2
Square wave: .001 Hz to 100 kHz
Triangle: .001 Hz to 2 kHz
2 kHz to 10 kHz
Ramps: .001 Hz to 500 Hz
500 Hz to 10 kHz
±0.1 dB
±1.0%
±1.5%
±5%
±1.5%
±10%
Flatness with no attenuation
Tolerance relative to
programmed amplitude at 1 kHz
±0.3 dB
(attenuator range 1) into a 50W load
Sine wave: 100 kHz to 20
MHz
Square wave: 100 kHz to 10 MHz
±10%
See footnotes at end of table.
3
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TB 9-6625-2049-35
Table 1. Calibration Description - Continued
Performance specifications
Tolerance relative to
programmed amplitude
Test instrument parameters
Amplitude accuracy with dc
offset and no attenuation
(range 1) into 50W load
Sine wave: .001 Hz to 100 kHz
Square: .001 Hz to 100 kHz
Triangle: .001 Hz to 2 kHz
2 kHz to 10 kHz
Ramps: .001 Hz to 500 Hz
500 Hz to 10 kHz
±0.3 dB
±3%
±4%
±6%
±4%
±11%
Tolerance relative to
programmed amplitude
±0.1 dB
Function and frequency range
Attenuator accuracy (these .001 Hz to 100 kHz
errors are additive with the
amplitude accuracy errors)
Attenuator ranges 2 through 8
100 kHz to 10 MHz
Attenuator ranges 2 through 8
10 MHz to 20 MHz
Attenuator ranges 2 through 4
Attenuator ranges 5 through 8
Range: 1.000 mV to 10.00 V p-p
Range: 4 mV to 40 V p-p (>500W)
±0.2 dB
±0.5 dB
0.2 dB
Amplitude output
Amplitude (option 002)
(high voltage output)
Accuracy: +2% of full output for each range at 2 kHz
Flatness: +10% of programmed amplitude
Range: +5 V dc
Dc offset
Accuracy: +0.4% of full peak output for each attenuator range2
Dc offset (option 002)
Dc plus ac
Range: +20 V dc
Accuracy: + (1% +25 mV) of full output for each attenuator range
Range: <1 MHz
Accuracy: +1.2%
Ramps: +2.4%
Range: >1 MHz
Accuracy: +3%
1Not verified below 50 Hz.
2Except lowest attenuator range where accuracy is ±20 mV.
SECTION II
EQUIP MENT REQUIREMENTS
4. Equ ip m en t Req u 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. Alternate items may be used by the calibrating activity. The
item 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.
4
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TB 9-6625-2049-35
5. Accessor ies Requ 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 accessory is also required for this calibration:
50W feedthrough termination, Hewlett-Packard, Model 11048C.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
AUDIO ANALYZER
Minimum use specifications
(part number)
Output: 4.5 V, 10 kHz
Boonton, Model 1120-S/10
AM distortion: £-30 dB at 10 kHz Distortion: (MIS-35954/2)
£-60 dB at 50 Hz
FREQUENCY COUNTER
MEASURING RECEIVER
Range: 99,9950 ms to 60,000,300 Hz
Accuracy: 1.25 x 10-8
Hewlett-Packard, Model 5345A
(MIS-28754/1 Type 1)
Capability: Time interval A to B
Frequency: 100 kHz to 10 MHz
Volts: .683 to .732 V rms
Accuracy: ±0.85%
Consisting of
:
Measuring
receiver
Hewlett-Packard,
Model 8902A and Sensor
module Hewlett-Packard, Model
11722A
AM: 0 to 80%
MULTIMETER
Range: -20.225 to +20.225 V dc
Accuracy: ±0.05%
Hewlett-Packard, Model
3458A
Range: 0.3416 to 20.4 V ac
100 Hz to 100 kHz
Accuracy: ±0.3%
OSCILLOSCOPE
Frequency: 1 kHz to 10 MHz
Amplitude: 1.8 to 2.2 V p-p
Accuracy: ±2.5%
Tektronix, Type 2430A
(OS-291/G)
Capabilities
Duty cycle: 49.7 to 50.3%
Overshoot: 5%
Rise time and fall time: <20 ns
Frequency: 50 kHz to 20 MHz
Input: -20 dBm and 40 V
Display capability: <-65 dBc
Frequency: 0.1 MHz
Amplitude: 13 dBm
SPECTRUM ANALYZER
(AN/USM-489A(V)1)
SYNTHESIZER/LEVEL
GENERATOR
Hewlett-Packard, Model
3335AOPT 001-K06
(MIS-35938)
TIME FREQUENCY
WORKSTATION
Reference output frequency: 10 MHz
Accuracy: ±5 x 10-8
Range: 470W
Autek Systems Corporation,
Model 620 (MIS-38946)
Biddle Gray, Model 71-631
(7910328)
RESISTANCE STANDARD
5
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TB 9-6625-2049-35
SECTION III
CALIBRATION P ROCESS
6. P r elim in a r y In st r u ct ion s
a . The instructions 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 TM 11-6625-3065-14 and the manufacturer's
manual for this TI.
d . When indications specified in paragraphs 8 through 19 are not within tolerance,
perform the power supply check prior to making adjustments.
After adjustments are
made, repeat paragraphs 8 through 19. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
7. E q u ip m en t Set u p
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
personnel fail to observe safety precautions.
DEATH ON CONTACT may result if
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
CAUTION
Before connecting TI to power source, make sure TI is set to
the power source line voltage shown on rear of TI.
a . Connect TI to a 115 V ac source. Press P OWER pushbutton to ON and allow at
least 24 hours (72 hours for option 001) for warmup.
b . Before continuing, review (1) through (4) below:
(1) The SWEEP LINEAR/LOG, ENTRY, F UNCTION, SIGNAL, and blue keys
each have an indicator denoting that it is activated.
(2) When power is applied to the TI, some keys will be lit.
(3) Pressing any F UNCTION key that is active will delete that function and no ac
signal will be present at the output.
(4) Some instructions will be repeated during programming. This is done to ensure
correct output is available.
6
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TB 9-6625-2049-35
8. Ha r m on ic Distor tion
a . P er for m a n ce Ch eck
(1) Connect TI EXT REF IN 1, 10 MHz to spectrum analyzer 10 MHz REF
IN/OUT.
(2) Connect TI SIGNAL to spectrum analyzer INP UT 50W.
(3) Press keys and enter values using DATA keys as listed in (a) through (h) below:
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION sine wave.
(c) ENTRY AMP TD.
(d) -20 d Bm .
(e) ENTRY DC OF F SET.
(f) 0 VOLT.
(g) ENTRY F REQ.
(h) 20 MHz.
(4) Adjust spectrum analyzer controls to display 20 MHz fundamental and at least
four harmonics. All harmonics will be at least 25 dB below fundamental.
(5) Enter 14 MHz using TI DATA keys. Adjust spectrum analyzer controls to
display 14 MHz fundamental and at least four harmonics. All harmonics will be at least 30
dB below fundamental.
(6) Enter 1.9 MHz using TI DATA keys. Adjust spectrum analyzer controls to
display 1.9 MHz fundamental and at least four harmonics. All harmonics will be at least
40 dB below fundamental.
(7) Enter 190 k Hz using TI DATA keys. Adjust spectrum analyzer controls to
display 190 kHz fundamental and at least four harmonics. All harmonics will be at least
60 dB below fundamental.
(8) Enter 100 k H z using TI DATA keys. Adjust spectrum analyzer controls to
display 100 kHz fundamental and at least four harmonics. All harmonics will be at least
60 dB below fundamental.
(9) Enter 40 k H z using TI DATA keys. Adjust spectrum analyzer controls to
display 40 kHz fundamental and at least four harmonics. All harmonics will be at least 65
dB below fundamental.
(10) Disconnect TI from spectrum analyzer.
(11) Connect TI SIGNAL to audio analyzer INP UT HIGH using 50W feedthrough
termination.
(12) Press keys and enter values using DATA keys as listed in (a) through (c) below:
7
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TB 9-6625-2049-35
(a) 50 Hz.
(b) ENTRY AMP TD.
(c) 10 VOLT.
(13) Set audio analyzer to measure distortion in dB. Audio analyzer indication will
be £-65 dB.
(14) Perform (15) through (19) below for option 002 only.
(15) Connect equipment as shown in figure 1 and set resistance standard to 470W.
Figure 1. Harmonic distortion - equipment setup.
(16) Press keys and enter values using DATA keys as listed in (a) through (e) below:
(a) SIGNAL on.
(b) ENTRY F REQ.
(c) 25 k H z.
(d) ENTRY AMP TD.
(e) 40 VOLT.
(17) Adjust spectrum analyzer controls to display 25 kHz fundamental and at least
four harmonics. All harmonics will be at least 65 dB below fundamental.
(18) Press ENTRY F REQ key and enter 190 k H z using DATA keys. Adjust
spectrum analyzer controls to display 190 kHz fundamental and at least four harmonics.
All harmonics will be at least 60 dB below fundamental.
(19) Enter 1 MHz using DATA keys. Adjust spectrum analyzer controls to display 1
MHz fundamental and at least four harmonics. All harmonics will be at least 40 dB below
fundamental.
b . Ad ju st m en t . No adjustments can be made.
8
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TB 9-6625-2049-35
9. Am p lit u d e Mod u la t ion Dist or t ion
a . P er for m a n ce Ch eck
(1) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION sine wave.
(c) ENTRY F REQ.
(d) 1 MHz.
(e) ENTRY AMP TD.
(f) 3 VOLT.
(g) ENTRY DC OF F SET.
(h) 0 VOLT.
(i) Blue then AM ON.
(2) Connect equipment as shown in figure 2.
Figure 2. AM distortion - equipment setup.
(3) Set audio analyzer for a 50W (SPCL 75), 10 kHz, 2.5 V output.
(4) Set measuring receiver to measure AM.
(5) Adjust audio analyzer level until measuring receiver indicates 80%.
(6) Set audio analyzer to measure distortion in dB. Audio analyzer indication will
be £-30 dB.
(7) Press TI blue key then DATA AM OF F key.
b . Ad ju st m en t s. No adjustments can be made.
10. Squ a r e Wa ve Ch a r a cter istics
a . P er for m a n ce Ch eck
(1) Press keys and enter values using DATA keys as listed in (a) through (f) below:
9
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TB 9-6625-2049-35
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION square wave.
(c) ENTRY F REQ.
(d) 1 MHz.
(e) ENTRY AMP TD.
(f) 1 V RMS.
(2) Connect TI SIGNAL to oscilloscope CH 1.
(3) Set oscilloscope CH 1 COUP LING 50W to ON.
(4) Set oscilloscope controls for duty cycle measurement. Duty cycle will be between
49.7 and 50.3 percent.
(5) Enter 10 VOLT using DATA keys.
(6) Set oscilloscope controls for rise time measurement. Rise time will be £20 ns.
(7) Repeat (6) above for fall time.
(8) Set oscilloscope controls for overshoot measurement. Overshoot will be £5
percent of peak to peak amplitude (£500 mV at positive and negative peaks).
(9) Perform (10) through (12) below for option 002 only.
(10) Set oscilloscope CH 1 COUP LING 50W to OF F .
(11) Press TI SIGNAL key on (lit).
(12) Repeat technique in (6) through (8) above. Rise time and fall time will be
£125 ns with an overshoot <10 percent of peak amplitude (<500 mV at positive and
negative peaks).
b . Ad ju st m en t s. No adjustments can be made.
11. Ra m p Retr a ce
a . P er for m a n ce Ch eck
(1) Connect TI SIGNAL to oscilloscope CH 1.
(2) Set oscilloscope CH 1 COUP LING 50W to ON.
(3) Press keys and enter values using DATA keys as listed in (a) through (f) below:
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION positive ramp.
(c) ENTRY F REQ.
(d) 10 k Hz.
(e) ENTRY AMP TD.
(f) 10 VOLT.
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TB 9-6625-2049-35
(4) Set oscilloscope controls to measure ramp retrace time from the 90 to 10 percent
points. Ramp retrace time will be £3 ms.
(5) Press F UNCTION negative ramp key and repeat (4) above.
b . Ad ju st m en t s. No adjustments can be made.
12. F r eq u en cy Accu r a cy
a . P er for m a n ce Ch eck
(1) Connect TI SIGNAL to frequency counter CHANNEL A.
(2) Press keys and enter values using DATA keys as listed in (a) through (f) below:
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION sine wave.
(c) ENTRY F REQ.
(d) 20 MHz.
(e) ENTRY AMP TD.
(f) .99 VOLT.
(3) Set frequency counter 50W/1MW switch to 50W.
(4) Set frequency counter controls to measure frequency. If frequency counter does
not indicate between 19.99990 and 20.00010 MHz, perform b below.
(5) Press F UNCTION square wave key. Frequency counter will indicate between
9.999950 and 10.000050 MHz.
(6) Disconnect frequency counter from TI SIGNAL.
(7) Connect frequency counter CHANNEL A to TI SYNC OUT.
(8) Press TI F UNCTION triangle key.
(9) Set frequency counter controls to measure period. Frequency counter will
indicate between 99.99950 and 100.00050 ms.
(10) Press F UNCTION positive ramp key. Frequency counter will indicate between
99.99950 and 100.00050 ms.
(11) Press F UNCTION negative ramp key. Frequency counter will indicate between
99.99950 and 100.00050 ms.
(12) Disconnect frequency counter from TI SYNC OUT.
(13) Connect frequency counter to TI AUX 21-60 MHz (rear panel).
(14) Press keys and enter values using DATA keys as listed in (a) through (c) below:
(a) F UNCTION sine wave.
(b) ENTRY F REQ.
(c) 60 MHz.
11
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TB 9-6625-2049-35
(15) Set frequency counter controls to measure frequency. If frequency counter does
not indicate between 59.99970 and 60.00030 MHz, perform b below.
b . Ad ju st m en t s
(1) Disconnect TI rear panel 10 MHz OVEN OUTP UT from EXT REF IN option
001 only.
(2) Connect frequency counter CHANNEL A to TI rear panel AUX 21-60 MHz.
(3) Press keys and enter values using DATA keys as listed in (a) through (c) below:
(a) F UNCTION sine wave.
(b) ENTRY F REQ.
(c) 60 MHz.
(4) Adjust REF R30 (fig. 3) until frequency counter indicates 60.000000 MHz (R).
Figure 3. Test instrument - bottom view.
(5) Disconnect frequency counter from TI rear panel AUX 21-60 MHz.
(6) Connect frequency counter CHANNEL A to TI SIGNAL.
(7) Enter 20 MHz using DATA keys. Frequency counter will indicate between
19.99990 and 20.00010 MHz.
(8) Disconnect frequency counter from TI.
(9) Perform (10) through (14) below for option 001 only.
(10) Connect time/frequency workstation OUTP UT 1 MHz to frequency difference
meter REF INP UT.
(11) Connect TI rear panel 10 MHz OVEN OUTP UT to frequency difference meter
SIG INP UT.
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TB 9-6625-2049-35
(12) Adjust A9R7 Fine Adj. (fig. 3) and A9 Coarse Adj. (fig. 3) for a minimum
indication on frequency difference meter.
(13) Disconnect TI from frequency difference meter.
(14) Reconnect TI rear panel 10 MHz OVEN OUTP UT to EXT REF IN.
13. P h a se In cr em en t
a . P er for m a n ce Ch eck
(1) Press keys and enter values using DATA keys as listed in (a) through (f) below:
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION sine wave.
(c) ENTRY F REQ.
(d) 100 k H z.
(e) ENTRY AMP TD.
(f) 13 d Bm .
(2) Connect equipment as shown in figure 4.
Figure 4. Phase increment - equipment setup.
NOTE
If TI has option 001, remove the connection from 10 MHz
OUTP UT to EXT REF IN (rear panel) (fig. 4).
(3) Set synthesizer/level generator frequency to .1 MHz and amplitude to 13 dBm.
(4) Set frequency counter controls for time interval A to B measurement.
(5) Press keys as listed in (a) through (c) below:
(a) ENTRY P HASE.
(b) MODIF Y until frequency counter indicates between 199 and 201 ns.
(c) Blue then ASGN ZERO P HASE.
13
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TB 9-6625-2049-35
(6) Adjust frequency counter sample rate control to HOLD and press RESET
pushbutton. Record frequency counter indication.
(7) Press ENTRY P HASE key and enter -1 d eg using DATA keys.
(8) Press frequency counter RESET pushbutton and record frequency counter
indication.
(9) Determine the difference between indication recorded in (6) above and indication
recorded in (8) above. The difference will be between 22.22 and 33.34 ns.
(10) Enter -10 d eg using DATA keys.
(11) Press frequency counter RESET pushbutton and record frequency counter
indication.
(12) Determine the difference between indication recorded in (6) above and indication
recorded in (11) above. The difference will be between 272.22 and 283.34 ns.
(13) Enter -100 d eg using DATA keys.
(14) Press frequency counter RESET pushbutton and record frequency counter
indication.
(15) Determine the difference between indication recorded in (6) above and indication
recorded in (14) above. The difference will be between 2722.22 and 2783.34 ns.
b . Ad ju st m en t s. No adjustments can be made.
14. Sin e w a ve Am p litu d e a n d F la tn ess
a . P er for m a n ce Ch eck
(1) Connect TI SIGNAL to multimeter INP UT HI and LO using 50W feedthrough
termination.
(2) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) SIGNAL off (option 002 not lit).
(b) ENTRY DC OF F SET.
(c) 0 VOLT.
(d) F UNCTION sine wave.
(e) ENTRY AMP TD.
(f) 3.536 V RMS.
(g) ENTRY F REQ.
(h) 100 H z.
(i) AMP TD CAL.
(3) Multimeter will indicate between 3.495 and 3.577 V ac.
(4) Repeat technique of (2)(e) through (i) and (3) above using TI settings and
multimeter indications listed in table 3.
14
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TB 9-6625-2049-35
Table 3. Amplitude
Test instrument settings
Multimeter indications
(V ac)
ENTRY AMP TD
ENTRY F REQ
1 kHz
3.536
3.536
1.061
1.061
1.061
.3536
.3536
.3536
V RMS
V RMS
V RMS
V RMS
V RMS
V RMS1
V RMS
V RMS
3.495
3.495
1.048
1.048
1.048
0.3416
0.3416
0.3416
3.577
3.577
1.073
1.073
1.073
0.3660
0.3660
0.3660
100 kHz
100 kHz
1 kHz
100 Hz
100 Hz
1 kHz
100 kHz
1Press ENTRY DC OF F SET key and enter 1 m V using DATA keys.
(5) Press keys and enter values using DATA keys as listed in (a) through (g) below:
(a) ENTRY DC OF F SET.
(b) 0 m V.
(c) ENTRY F REQ.
(d) 1 k H z.
(e) ENTRY AMP TD.
(f) .707 V RMS.
(g) AMP TD CAL.
(6) Press MODIF Y keys for a multimeter indication as close as possible to 0.707 V
ac.
(7) Enter 100 k Hz using DATA keys. Multimeter will indicate between 0.683
and 0.732 V ac. Record multimeter indication.
(8) Disconnect multimeter and 50W feedthrough termination from TI.
NOTE
If necessary, ZERO and CALIBRATE measuring receiver and
sensor module.
(9) Connect measuring receiver sensor module to TI SIGNAL.
(10) Set measuring receiver to measure volts at .1 MHz.
(11) Press ENTRY AMP TD key.
(12) Press MODIF Y keys for a measuring receiver indication as close as possible to
indication recorded in (7) above.
(13) Press ENTRY F REQ key and enter 500 k H z using DATA keys.
(14) Set measuring receiver to measure volts at .5 MHz. Measuring receiver will
indicate between 0.683 and 0.732 V.
(15) Repeat technique of (13) and (14) above using TI and measuring receiver
settings listed in table 4. Measuring receiver will indicate between 0.683 and 0.732 V.
15
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TB 9-6625-2049-35
Table 4. Flatness
Test instrument
and measuring receiver
settings (MHz)
1
2
4
6
8
10
12
14
16
18
20
b . Ad ju st m en t s. No adjustments can be made.
15. Squ a r e Wa ve Am p litu d e a n d F la tn ess
a . P er for m a n ce Ch eck
(1) Connect TI SIGNAL to multimeter INP UT HI and LO using 50W feedthrough
termination.
(2) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) SIGNAL off (option 002 not lit).
(b) ENTRY DC OF F SET.
(c) 0 VOLT.
(d) F UNCTION square wave.
(e) ENTRY AMP TD.
(f) 5 V RMS.
(g) ENTRY F REQ.
(h) 100 H z.
(i) AMP TD CAL.
(3) Multimeter will indicate between 4.95 and 5.05 V ac.
(4) Enter 1 k Hz using DATA keys. Multimeter will indicate between 4.95 and 5.05
V ac.
(5) Enter 100 k Hz using DATA keys. Multimeter will indicate between 4.95 and
5.05 V ac.
(6) Press keys and enter values using DATA keys as listed in (a) through (d) below:
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TB 9-6625-2049-35
(a) 1 k H z.
(b) ENTRY AMP TD.
(c) 1 V RMS.
(d) AMP TD CAL.
(7) Multimeter will indicate between 0.99 and 1.01 V ac.
(8) Disconnect TI from multimeter.
(9) Connect TI SIGNAL to oscilloscope CH 1 using 50W feedthrough termination.
(10) Set oscilloscope controls to measure square wave amplitude. Record oscilloscope
indication.
(11) Press ENTRY F REQ key and enter 1 MHz using DATA keys.
(12) Set oscilloscope controls to measure square wave amplitude. Oscilloscope
indication will be within ±10 percent of indication recorded in (10) above.
(13) Enter 3 MHz using DATA keys and repeat (12) above.
(14) Enter 5 MHz using DATA keys and repeat (12) above.
(15) Enter 10 MHz using DATA keys and repeat (12) above.
b . Ad ju st m en t s. No adjustments can be made.
16. Tr ia n gle a n d Ra m p Am p litu d e
a . P er for m a n ce Ch eck
(1) Connect TI SIGNAL to multimeter INP UT HI and LO using 50W feedthrough
termination.
(2) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) SIGNAL off (option 002 not lit).
(b) ENTRY DC OF F SET.
(c) 0 VOLT.
(d) F UNCTION triangle.
(e) ENTRY AMP TD.
(f) 2.887 V RMS.
(g) ENTRY F REQ.
(h) 100 H z.
(i) AMP TD CAL.
(3) Multimeter will indicate between 2.843 and 2.931 V ac.
(4) Enter 1.9 k Hz using DATA keys. Multimeter will indicate between 2.843 and
2.931 V ac.
(5) Enter 2.1 k Hz using DATA keys. Multimeter will indicate between 2.742 and
3.032 V ac.
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TB 9-6625-2049-35
(6) Enter 10 k Hz using DATA keys. Multimeter will indicate between 2.742 and
3.032 V ac.
(7) Press keys and enter values using DATA keys as listed in (a) through (c) below:
(a) F UNCTION positive ramp.
(b) 100 Hz.
(c) AMP TD CAL.
(8) Multimeter will indicate between 2.843 and 2.931 V ac.
(9) Enter 499 Hz using DATA keys. Multimeter will indicate between 2.843 and
2.931 V ac.
(10) Enter 501 Hz using DATA keys. Multimeter will indicate between 2.598 and
3.176 V ac.
(11) Enter 10 k Hz using DATA keys. Multimeter will indicate between 2.598 and
3.176V ac.
b . Ad ju st m en t s. No adjustments can be made.
17. Dc Offset
a . P er for m a n ce Ch eck
(1) Connect TI SIGNAL to multimeter INP UT HI and LO using 50W feedthrough
termination.
(2) Press SIGNAL key off (option 002 not lit).
(3) Press presently active F UNCTION key to remove ac output and activate
ENTRY DC OF F SET key (lit).
(4) Enter 5 VOLT using DATA keys and press AMP TD CAL key.
(5) Multimeter will indicate between 4.98 and 5.02 V dc.
(6) Enter -5 VOLT using DATA keys. Multimeter will indicate between -4.98
and -5.02 V dc.
(7) Repeat technique of (6) above using TI settings and multimeter indications
listed in table 5.
Table 5. Dc Offset
Test instrument
DC OF F SET
settings
Multimeter indications
(V dc)
Min
Max
1.499
VOLT
1.493
1.505
-1.499
499.9
VOLT
mV
mV
mV
mV
-1.505
0.4979
-0.5019
0.1493
-0.1505
0.04979
-0.05019
-1.493
0.5019
-0.4979
0.1505
-0.1493
0.05019
-0.04979
-499.9
149.9
-149.9
49.99
-49.99
mV
mV
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TB 9-6625-2049-35
Table 5. Dc Offset - Continued
Test instrument
DC OF F SET
settings
Multimeter indications
(V dc)
Min
Max
14.99
-14.99
4.999
-4.999
1.499
-1.499
mV
mV
mV
mV
mV
mV
0.01493
0.01505
-0.01505
0.004979
-0.005019
0.001479
-0.001519
-0.01493
0.005019
-0.004979
0.001519
-0.001479
NOTE
Perform (8) through (11) below for option 002 only.
(8) Remove 50W feedthrough termination from equipment setup.
(9) Press SIGNAL key on.
(10) Enter 20 VOLT using DATA keys. Multimeter will indicate between 19.775
and 20.225 V dc.
(11) Enter -20 VOLT using DATA keys. Multimeter will indicate between -19.775
and -20.225 V dc.
b . Ad ju st m en t s. No adjustments can be made.
18. Dc Offset w it h Ac
a . P er for m a n ce Ch eck
(1) Connect SIGNAL to multimeter INP UT HI and LO using 50W feedthrough
termination.
(2) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) SIGNAL off (option 002 not lit).
(b) F UNCTION sine wave.
(c) ENTRY F REQ.
(d) 20.999 999 999 MHz.
(e) ENTRY AMP TD.
(f) 1 VOLT.
(g) ENTRY DC OF F SET.
(h) 4.5 VOLT.
(i) AMP TD CAL.
(3) Multimeter will indicate between 4.35 and 4.65 V dc.
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TB 9-6625-2049-35
(4) Enter -4.5 VOLT using DATA keys. Multimeter will indicate between -4.35 and
-4.65 V dc.
(5) Press ENTRY F REQ key and enter 999.9 k Hz using DATA keys. Multimeter
will indicate between -4.44 and -4.56 V dc.
(6) Press ENTRY DC OF F SET key and enter 4.5 VOLT using DATA keys.
Multimeter will indicate between 4.44 and 4.56 V dc.
(7) Press F UNCTION square wave key. Multimeter will indicate between 4.44 and
4.56 V dc.
(8) Enter -4.5 VOLT using DATA keys. Multimeter will indicate between -4.44 and
-4.56 V dc.
(9) Press ENTRY F REQ key and enter 9.9999 MHz using DATA keys.
Multimeter will indicate between -4.35 and -4.65 V dc.
(10) Press F UNCTION triangle key and enter 9.9 k H z using DATA keys.
(11) Multimeter will indicate between -4.44 and -4.56 V dc.
(12) Press F UNCTION positive ramp key. Multimeter will indicate between -4.38
and -4.62 V dc.
b . Ad ju st m en t s. No adjustments can be made.
19. High Volta ge Ou tp u t Op tion 002 on ly
a . P er for m a n ce Ch eck
(1) Connect SIGNAL to multimeter INP UT HI and LO.
(2) Press keys and enter values using DATA keys as listed in (a) through (i) below:
(a) F UNCTION sine wave.
(b) ENTRY F REQ.
(c) 2 k H z.
(d) SIGNAL on.
(e) ENTRY DC OF F SET.
(f) 0 VOLT.
(g) ENTRY AMP TD.
(h) 14.14 V RMS.
(i) AMP TD CAL.
(3) Multimeter will indicate between 13.86 and 14.42 V ac.
(4) Press keys and enter values using DATA keys as listed in (a) through (e) below:
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TB 9-6625-2049-35
(a) ENTRY F REQ.
(b) 100 k H z.
(c) ENTRY AMP TD.
(d) 10 V RMS.
(e) AMP TD CAL.
(5) Multimeter will indicate between 9 and 11 V ac.
(6) Press keys and enter values using DATA keys as listed in (a) through (f) below:
(a) F UNCTION square wave.
(b) ENTRY F REQ.
(c) 2 k H z.
(d) ENTRY AMP TD.
(e) 20 V RMS.
(f) AMP TD CAL.
(7) Multimeter will indicate between 19.6 and 20.4 V ac.
(8) Press F UNCTION triangle key and enter 11.5 V RMS using DATA keys.
(9) Press AMP TD CAL key. Multimeter will indicate between 11.27 and 11.73 V ac.
(10) Press F UNCTION positive ramp key and repeat (9) above.
b . Ad ju st m en t s. No adjustments can be made.
20. P ow er Su p p ly
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
a . P er for m a n ce Ch eck
(1) Connect multimeter INP UT HI to -15 V TP (fig. 5) and LO to ground side of C9
(fig. 5). Adjust R22 (fig. 5) for a multimeter indication of -14.97 to -15.03 V dc (R).
(2) Connect multimeter INP UT HI to +15 V TP (fig. 5). Readjust R22 (fig. 5) if
multimeter does not indicate between 14.9 and 15.1 V dc.
(3) Connect multimeter INP UT HI to +5 V TP (fig. 5). Readjust R22 (fig. 5) if
multimeter does not indicate between 5.01 and 5.05 V dc.
(4) Repeat (1) through (3) above for best in-tolerance condition on all test points.
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TB 9-6625-2049-35
Figure 5. Power supply assembly A2 – test instrument top view.
(5) Press presently active F UNCTION key to remove ac output and activate
ENTRY DC OF F SET key (lit).
(6) Enter 0 VOLT using DATA keys and press AMP TD CAL key.
(7) Connect multimeter INP UT HI to TP AMP OUT (fig. 3) and LO to circuit board
ground.
NOTE
The voltages measured in (1) through (3) above may be
adjusted out of tolerance by (8) through (11) below. This is not
a cause for concern.
(8) Adjust R40 (fig. 3) until digital multimeter indicates less than 5 mV dc (R).
(9) Connect multimeter INP UT HI and LO to TI SIGNAL. Do not use 50W
feedthrough termination.
(10) Enter 5 VOLT using DATA keys.
(11) Press AMP TD CAL key. Adjust R22 (fig. 5) until multimeter indicates 10.000
V dc.
(12) Enter -5 VOLT using DATA keys.
(13) Multimeter will indicate between -9.985 and -10.015 V dc.
21. 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.
22
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TB 9-6625-2049-35
By Order of the Secretary of the Army:
Official:
ERIC K. SHINSEKI
General, United States Army
Chief of Staff
JOEL B. HUDSON
Administrative Assistant to the
Secretary of the Army
0029703
DISTRIBUTION:
To be distributed in accordance with IDN 342200, requirements for calibration
procedure TB 9-6625-2049-35.
PIN: 052316-000
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