- Hewlett-Packard Portable Generator - Generator User Manual

ManualsBrandsHP ManualsRadio3325B

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*This bulletin supersedes TB 9-6625-2049-35, 15 January 1996.

*TB 9-6625-2049-35

SUPERSEDED COPY DATED 15 JANUARY 1996

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

CALIBRATION PROCEDURE FOR

SYNTHESIZER/FUNCTION GENERATOR

HEWLETT-PACKARD

MODELS 3325A( ) AND 3325B( )

Headquarters, Department of the Army, Washington, DC

2 January 2001

Approved for public release; distribution is unlimited

Paragraph

Page

SECTION I. IDENTIFICATION AND DESCRIPTION

Test instrument identification............................

1 2

Forms, records, and reports................................

2 2

Calibration description .......................................

3 2

II. EQUIPMENT REQUIREMENTS

Equipment required............................................

4 4

Accessories required ...........................................

5 5

III CALIBRATION PROCESS

Preliminary instructions.....................................

6 6

Equipment setup.................................................

7 6

Harmonic distortion............................................

8 7

Amplitude modulation distortion........................

9 9

Square wave characteristics ...............................

10 9

Ramp retrace.......................................................

11 10

Frequency accuracy ............................................

12 11

Phase increment .................................................

13 13

Sine wave amplitude and flatness......................

14 14

Square wave amplitude and flatness..................

15 16

REPORTING OF ERRORS AND RECOMMENDED IMPROVEMENTS

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

Summary of content (23 pages)

PAGE 1
*TB 9-6625-2049-35 SUPERSEDED COPY DATED 15 JANUARY 1996 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR SYNTHESIZER/FUNCTION GENERATOR HEWLETT-PACKARD MODELS 3325A( ) AND 3325B( ) Headquarters, Department of the Army, Washington, DC 2 January 2001 Approved for public release; distribution is unlimited REPORTING OF ERRORS AND RECOMMENDED IMPROVEMENTS 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.
PAGE 2
TB 9-6625-2049-35 SECTION II Paragraph Page 16 17 18 19 20 21 17 18 19 20 21 22 CALIBRATION PROCESS - Continued I. Triangle and ramp amplitude ............................ Dc offset............................................................... Dc offset with ac .................................................. High voltage output option 002 only................... Power supply ....................................................... Final procedure ..................................................
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TB 9-6625-2049-35 Test instrument parameters Harmonic distortion1 (relative to fundamental at full output) Amplitude modulation Square wave Ramp retrace Frequency Sine wave Square wave Triangle Positive slope ramp Negative slope ramp Phase offset Amplitude Amplitude accuracy with no attenuation (attenuator range 1) into 50Ω load (no dc offset ) Flatness with no attenuation (attenuator range 1) into a 50Ω load See footnotes at end of table. Table 1.
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TB 9-6625-2049-35 Table 1. Calibration Description - Continued Test instrument parameters Performance specifications Tolerance relative to Amplitude accuracy with dc programmed amplitude offset and no attenuation (range 1) into 50Ω load Sine wave: .001 Hz to 100 kHz ±0.3 dB Square: .001 Hz to 100 kHz ±3% Triangle: .001 Hz to 2 kHz ±4% 2 kHz to 10 kHz ±6% Ramps: .001 Hz to 500 Hz ±4% 500 Hz to 10 kHz ±11% Tolerance relative to Function and frequency range programmed amplitude Attenuator accuracy (these .
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TB 9-6625-2049-35 5. Accessories Required. 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: 50Ω feedthrough termination, Hewlett-Packard, Model 11048C. Table 2. Minimum Specifications of Equipment Required Common name AUDIO ANALYZER FREQUENCY COUNTER MEASURING RECEIVER Minimum use specifications Output: 4.
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TB 9-6625-2049-35 SECTION III CALIBRATION PROCESS 6. Preliminary Instructions 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.
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TB 9-6625-2049-35 8. Harmonic Distortion a. Performance Check (1) Connect TI EXT REF IN 1, 10 MHz to spectrum analyzer 10 MHz REF IN/OUT. (2) Connect TI SIGNAL to spectrum analyzer INPUT 50Ω Ω. (3) Press keys and enter values using DATA keys as listed in (a) through (h) below: (a) (b) (c) (d) (e) (f) (g) (h) SIGNAL off (option 002 not lit). FUNCTION sine wave. ENTRY AMPTD. -20 dBm. ENTRY DC OFFSET. 0 VOLT. ENTRY FREQ. 20 MHz.
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TB 9-6625-2049-35 (a) 50 Hz. (b) ENTRY AMPTD. (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 470Ω. Figure 1. Harmonic distortion - equipment setup. (16) Press keys and enter values using DATA keys as listed in (a) through (e) below: (a) (b) (c) (d) (e) SIGNAL on. ENTRY FREQ. 25 kHz. ENTRY AMPTD. 40 VOLT.
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TB 9-6625-2049-35 9. Amplitude Modulation Distortion a. Performance Check (1) Press keys and enter values using DATA keys as listed in (a) through (i) below: (a) SIGNAL off (option 002 not lit). (b) FUNCTION sine wave. (c) ENTRY FREQ. (d) 1 MHz. (e) ENTRY AMPTD. (f) 3 VOLT. (g) ENTRY DC OFFSET. (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 50Ω (SPCL 75), 10 kHz, 2.5 V output.
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TB 9-6625-2049-35 (a) (b) (c) (d) (e) (f) SIGNAL off (option 002 not lit). FUNCTION square wave. ENTRY FREQ. 1 MHz. ENTRY AMPTD. 1 V RMS. (2) Connect TI SIGNAL to oscilloscope CH 1. (3) Set oscilloscope CH 1 COUPLING 50Ω Ω 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.
PAGE 11
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 µs. (5) Press FUNCTION negative ramp key and repeat (4) above. b. Adjustments. No adjustments can be made. 12. Frequency Accuracy a. Performance Check (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) (b) (c) (d) (e) (f) SIGNAL off (option 002 not lit). FUNCTION sine wave.
PAGE 12
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. Adjustments (1) Disconnect TI rear panel 10 MHz OVEN OUTPUT 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) FUNCTION sine wave. (b) ENTRY FREQ. (c) 60 MHz. (4) Adjust REF R30 (fig.
PAGE 13
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 OUTPUT to EXT REF IN. 13. Phase Increment a. Performance Check (1) Press keys and enter values using DATA keys as listed in (a) through (f) below: (a) (b) (c) (d) (e) (f) SIGNAL off (option 002 not lit). FUNCTION sine wave. ENTRY FREQ. 100 kHz. ENTRY AMPTD. 13 dBm.
PAGE 14
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 PHASE key and enter -1 deg 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 deg using DATA keys.
PAGE 15
TB 9-6625-2049-35 Table 3. Amplitude Test instrument settings Multimeter indications (V ac) ENTRY AMPTD ENTRY FREQ 3.536 V RMS 1 kHz 3.495 3.577 3.536 V RMS 100 kHz 3.495 3.577 1.061 V RMS 100 kHz 1.048 1.073 1.061 V RMS 1 kHz 1.048 1.073 1.061 V RMS 100 Hz 1.048 1.073 .3536 V RMS1 100 Hz 0.3416 0.3660 .3536 V RMS 1 kHz 0.3416 0.3660 .3536 V RMS 100 kHz 0.3416 0.3660 1Press ENTRY DC OFFSET key and enter 1 mV using DATA keys.
PAGE 16
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. Adjustments. No adjustments can be made. 15. Square Wave Amplitude and Flatness a. Performance Check (1) Connect TI SIGNAL to multimeter INPUT HI and LO using 50Ω feedthrough termination. (2) Press keys and enter values using DATA keys as listed in (a) through (i) below: (a) (b) (c) (d) (e) (f) (g) (h) (i) SIGNAL off (option 002 not lit). ENTRY DC OFFSET. 0 VOLT. FUNCTION square wave.
PAGE 17
TB 9-6625-2049-35 (a) (b) (c) (d) 1 kHz. ENTRY AMPTD. 1 V RMS. AMPTD 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 50Ω feedthrough termination. (10) Set oscilloscope controls to measure square wave amplitude. Record oscilloscope indication. (11) Press ENTRY FREQ key and enter 1 MHz using DATA keys. (12) Set oscilloscope controls to measure square wave amplitude.
PAGE 18
TB 9-6625-2049-35 (6) Enter 10 kHz 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) FUNCTION positive ramp. (b) 100 Hz. (c) AMPTD 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.
PAGE 19
TB 9-6625-2049-35 Table 5. Dc Offset - Continued Test instrument Multimeter indications (V dc) DC OFFSET settings Min Max 14.99 mV 0.01493 0.01505 -14.99 mV -0.01505 -0.01493 4.999 mV 0.004979 0.005019 -4.999 mV -0.005019 -0.004979 1.499 mV 0.001479 0.001519 -1.499 mV -0.001519 -0.001479 NOTE Perform (8) through (11) below for option 002 only. (8) Remove 50Ω feedthrough termination from equipment setup. (9) Press SIGNAL key on. (10) Enter 20 VOLT using DATA keys. Multimeter will indicate between 19.
PAGE 20
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 FREQ key and enter 999.9 kHz using DATA keys. Multimeter will indicate between -4.44 and -4.56 V dc. (6) Press ENTRY DC OFFSET key and enter 4.5 VOLT using DATA keys. Multimeter will indicate between 4.44 and 4.56 V dc. (7) Press FUNCTION 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.
PAGE 21
TB 9-6625-2049-35 (a) (b) (c) (d) (e) ENTRY FREQ. 100 kHz. ENTRY AMPTD. 10 V RMS. AMPTD 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) (b) (c) (d) (e) (f) FUNCTION square wave. ENTRY FREQ. 2 kHz. ENTRY AMPTD. 20 V RMS. AMPTD CAL. (7) Multimeter will indicate between 19.6 and 20.4 V ac. (8) Press FUNCTION triangle key and enter 11.5 V RMS using DATA keys. (9) Press AMPTD CAL key.
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TB 9-6625-2049-35 Figure 5. Power supply assembly A2 – test instrument top view. (5) Press presently active FUNCTION key to remove ac output and activate ENTRY DC OFFSET key (lit). (6) Enter 0 VOLT using DATA keys and press AMPTD CAL key. (7) Connect multimeter INPUT 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.
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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.