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HP (Hewlett-Packard) 3325A manual

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Table of contents for the manual

  • Page 1

    __________ *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 *TB 9 - 6625 - 2049 - 35 SUPERSEDED COPY DATED 15 JANUARY 1996 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR SYNTHESIZER/FUNCTION GENERATOR HEWLETT - PACKARD MODELS 3325A( )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[...]

  • Page 2

    TB 9 - 6625 - 2049 - 35 2 Paragraph Page SECTION II I. CALIBRATION PROCESS - Continued Triangle and ramp amplitude ............................ 16 17 Dc offset ............................................................... 17 18 Dc of fset with ac .................................................. 18 19 High voltage output option 002 only ........[...]

  • Page 3

    TB 9 - 6625 - 2049 - 35 3 Table 1 . Calibration Description Test instrument parameters Performance specifications Harmonic distortion 1 (relative to fundam ental at full output) Fundamental frequency: 0.1 Hz To 50 kHz Accuracy: No harmonic greater than - 65 dB Fundamental frequency: 50 to 200 kHz Accuracy: No harmonic greater than - 60 dB Fundament[...]

  • Page 4

    TB 9 - 6625 - 2049 - 35 4 Table 1. Calibration Description - Continued Test instrum ent parameters Performance specifications Amplitude accuracy with dc offset and no attenuation (range 1) into 50 Ω load Tolerance relative to programmed amplitude Sine wave: .001 Hz to 100 kHz ± 0.3 dB Square: .001 Hz to 100 kHz ± 3% Triangle: .001 Hz to 2 kHz 2[...]

  • Page 5

    TB 9 - 6625 - 2049 - 35 5 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 i s also required for this calibration: 50 Ω feedthrough termination, Hewlett - Packard, Model 1[...]

  • Page 6

    TB 9 - 6625 - 2049 - 35 6 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 b efore beginning the calibration. b . Items of equipment used in this procedure are referenced within the tex[...]

  • Page 7

    TB 9 - 6625 - 2049 - 35 7 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 50 Ω Ω . (3) Press keys and enter values using DATA keys as listed in (a) through (h) below: (a) SIGNAL off (option 002 not lit). (b) FUNCTION sine wa[...]

  • Page 8

    TB 9 - 6625 - 2049 - 35 8 (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 equipm ent as shown in figure 1 and set resistance standard to 470 Ω . Figure 1. Harmonic distortion - equ[...]

  • Page 9

    TB 9 - 6625 - 2049 - 35 9 9. Amplitude Modulation Distortion a. Performance Check (1) Press keys and enter values using DATA keys as listed in (a) throug h (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) C[...]

  • Page 10

    TB 9 - 6625 - 2049 - 35 10 (a) SIGNAL off (option 002 not lit). (b) FUNCTION square wave. (c) ENTRY FREQ . (d) 1 MHz . (e) ENTRY AMPTD . (f) 1 V RMS . (2) Connect TI SIGNAL to oscilloscope CH 1 . (3) Set oscilloscope CH 1 COUPLING 50 Ω Ω to ON . (4) Set osc illoscope controls for duty cycle measurement. Duty cycle will be between 49.7 and 50.3 [...]

  • Page 11

    TB 9 - 6625 - 2049 - 35 11 (4) Set oscilloscope controls to measure ramp retrace time from the 90 to 10 percent points. Ramp retrace time will be ≤ 3 µ s. ( 5) Press FUNCTION negat ive 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[...]

  • Page 12

    TB 9 - 6625 - 2049 - 35 12 (15) Set frequency counter controls to measure frequency. If frequency counter does not indic ate 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[...]

  • Page 13

    TB 9 - 6625 - 2049 - 35 13 (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 Incremen t a. Performance Check (1) Press keys and enter values using DATA ke[...]

  • Page 14

    TB 9 - 6625 - 2049 - 35 14 (6) Adj ust 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 indi cation. (9) Determine the difference between indication reco[...]

  • Page 15

    TB 9 - 6625 - 2049 - 35 15 Table 3. Amplitude Test instrument settings Multimeter indications ENTRY AMPTD ENTRY FREQ (V ac) 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 RMS 1 100 Hz 0.3416 0.3660 .3536 V RMS 1 kHz 0.3416 0.3660 .353[...]

  • Page 16

    TB 9 - 6625 - 2049 - 35 16 Table 4. Flatness Test instrument and measuring receiver setting s (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 50 Ω feedthrough termination. (2) Press ke ys and enter v[...]

  • Page 17

    TB 9 - 6625 - 2049 - 35 17 (a) 1 kHz . (b) ENTRY AMPTD . (c) 1 V RMS . (d) 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 50 Ω feedthrough termination. (10) Set oscilloscope controls to measure square wave amplitude. Record oscilloscope indic[...]

  • Page 18

    TB 9 - 6625 - 2049 - 35 18 (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. [...]

  • Page 19

    TB 9 - 6625 - 2049 - 35 19 Table 5. Dc Offset - Continued Test instrument DC OFFSET Multimeter indications (V dc) se ttings 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 op[...]

  • Page 20

    TB 9 - 6625 - 2049 - 35 20 (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 ENT RY DC OFFSET key and enter 4.5 VOLT using DATA keys. Multimeter will indicate between 4.44 and [...]

  • Page 21

    TB 9 - 6625 - 2049 - 35 21 (a) ENTRY FREQ . (b) 100 kHz . (c) ENTRY AMPTD . (d) 10 V RMS . (e) AMPTD CAL . (5) Multimete r 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) FUNCTION square wave. (b) ENTRY FREQ . (c) 2 kHz . (d) ENTRY AMPTD . (e) 20 V RMS . (f) AMPTD CAL . (7[...]

  • Page 22

    TB 9 - 6625 - 2049 - 35 22 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 volt[...]

  • Page 23

    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 Sec retary 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[...]