Boonton-1120-1121-cal-078339 电路图.pdf

TB 9-6625-2271-50 CHANGE 1 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR AUDIO ANALYZER BOONTON, MODEL 1120-S/10 and 1121 Headquarters, Department of the Army, Washington, DC 8 July 2004 Distribution Statement A: Approved for public release; distribution is unlimited. TB 9-6625-2271-50, 18 July 2003, is changed as follows: 1. Remove old pages and insert new pages as indicated below. New or changed material is indicated by a vertical bar in the margin of the page. Remove Pages Insert Pages 1 and 2 1 and 2 3 and 4 3 and 4 9 and 10 9 and 10 15 and 16 15 and 16 2. File this change sheet in front of the publication for reference purposes. Distribution: To be distributed in accordance with Std. IDS No. RLC-1500, 2 January 2003, requirements for calibration procedure TB 9-6625-2271-50. By Order of the Secretary of the Army: PETER J. SCHOOMAKER General, United States Army Chief of Staff Official: JOEL B. HUDSON Administrative Assistant to the Secretary of the Army 0413104 RadioFans.CN 收音机爱 好者资料库 _ This bulletin supercedes TB 9-6625-2271-50, dated 21 August 2000. *TB 9-6625-2271-50 DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR AUDIO ANALYZER BOONTON, MODEL 1120-S/10 and 1121 Headquarters, Department of the Army, Washington, DC 18 July 2003 Approved for public release; distribution is unlimited REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS You can improve this manual. If you find any mistakes or if you know of a way to improve these procedures, please let us know. Mail your letter or DA Form 2028 (Recommended Changes to Publications and Blank Forms) directly to: Commander, U.S. Army Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP, Redstone Arsenal, AL 35898-5000. A reply will be furnished to you. You may also provide DA Form 2028 information to AMCOM via e-mail, fax, or the World Wide Web. Our fax number is DSN 788-6546 or Commercial 256-842-6546. Our e-mail address is: 2028redstone.army.mil. Instructions for sending an electronic 2028 may be found at the back of this manual. For the World Wide Web, use https:/amcom2028.redstone.army.mil. 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 4 III. CALIBRATION PROCESS Preliminary instructions. 6 5 Equipment setup and internal calibration. 7 5 Dc measurement accuracy . 8 7 Ac measurement accuracy. 9 8 Frequency measurement. 10 10 Filters frequency accuracy . 11 11 Distortion measurement accuracy. 12 12 Output frequency accuracy . 13 14 Output level. 14 16 Output distortion. 15 19 SINAD measurement accuracy . 16 20 Final procedure. 17 22 RadioFans.CN 收音机爱 好者资料库 TB 9-6625-2271-50 CHANGE 1 2 SECTION I IDENTIFICATION AND DESCRIPTION 1. Test Instrument Identification. This bulletin provides instructions for the calibration of Audio Analyzer, Boonton, Model 1120-S/10 and 1121. The manufacturers manuals were used as the prime data source in compiling these instructions. The equipment being calibrated will be referred to as the TI (test instrument) throughout this bulletin. a. Model Variations. Variations among models are described within the text. b. Time and Technique. The time required for this calibration is approximately 6 hours, using the dc and low frequency technique. 2. Forms, Records, and Reports a. Forms, records, and reports required for calibration personnel at all levels are prescribed by TB 750-25. b. Adjustments to be reported are designated (R) at the end of a sentence in which they appear. When adjustments are in tables, the (R) follows the designated adjustment. Report only those adjustments made and designated with (R). 3. Calibration Description. TI parameters and performance specifications which pertain to this calibration are listed in table 1. Table 1. Calibration Description Test instrument parameters Performance specifications Dc level measurement Range: 3, 30, 300 V FS Accuracy: +1% or 3 counts whichever is greater Ac level measurement Range: 3, 30, 300 mV and 3, 30, 300 V Range: 50 Hz to 50 kHz (1 mV to 300 V) Accuracy: +1% Range: 20 to 50 Hz and 50 to 100 kHz (1 mV to 300 V) Accuracy: +2% Range: 10 to 20 Hz1 (1 mV to 300 V) Accuracy: +3% Range: 10 Hz to 100 kHz1 (.3 mV to 300 V) Accuracy: +4 Flatness Range: 1 mV to 300V Range: 50 Hz to 50 kHz (1 mV to 300 V) Accuracy: +0.5% Range: 20 to 50 Hz and 50 kHz to 100 kHz (1 mV to 300 V) Accuracy: +1.0% Range: 10 to 20 Hz1 (1 mV to 300 V) Accuracy: +2.0% See footnotes at end of table. RadioFans.CN 收音机爱 好者资料库 TB 9-6625-2271-50 CHANGE 1 3 Table 1. Calibration Description Continued Frequency counter Range: 20 Hz to 500 kHz Sensitivity: 3 mV Accuracy: +1 ppm/yr +1 count Audio filters Range: 30 kHz low-pass Accuracy: +2 kHz Range: 80 kHz low-pass Accuracy: +4 kHz Range: 220 kHz low-pass Accuracy: +20 kHz Range: 400 Hz high-pass Accuracy: +40 Hz Distortion measurement Range: 10 Hz to 20 kHz Accuracy: +1 dB Range: 20 to 100 kHz Accuracy: +2 dB Input voltage range: 10 mV to 300 V SINAD measurement Frequency range: 10 Hz to 100 kHz Input voltage range: 10 mV to 300 V Display range: -120.00 to 0.00 dB2 Accuracy: +1 dB, 20 Hz to 20 kHz +2 dB, 10 Hz to 100 kHz Output frequency Range: 20 Hz to 140 kHz Accuracy: +10 ppm +1 count +10 ppm +Time base error +1 count( Boonton 1121) Output level Range: 10 Hz to 50 kHz, 0.6 mV to 16 V Accuracy: +0.5% of setting +0.05% of range Range: 50 to 100 kHz, 0.6 mV to 16 V Accuracy: +1.0% of setting +0.05% of range Range: 100 to 140 kHz, 0.6 mV to 16 V Accuracy: +1.5% of setting +0.1% of range Flatness Ref 1 kHz (.30 mV to 8 V into 50) Accuracy: +0.5%; 10 Hz1 to 50 kHz Output distortion Range: 10 Hz to 20 kHz, 80 kHz bandwidth Accuracy: 0.01% (<-80 dB) Range: 20 to 50 kHz, 220 kHz bandwidth Accuracy: 0.02% (<-74 dB) Range: 50 to 100 kHz, 500 kHz bandwidth Accuracy: 0.056% (<-65 dB) Range: 100 to 140 kHz, 500 kHz bandwidth Accuracy: 0.1% (<-60 dB) 1Not checked below 20 Hz. 2Not verified below -30 dB. TB 9-6625-2271-50 4 SECTION II EQUIPMENT REQUIREMENTS 4. Equipment Required. Table 2 identifies the specific equipment to be used in this calibration procedure. This equipment is issued with Secondary Reference Calibration Standards Set NSN 4931-00-621-7878. 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. Accessories Required. The accessories required for the calibration are common usage accessories, issued as indicated in paragraph 4 above and are not listed in this calibration procedure. Table 2. Minimum Specifications of Equipment Required Common name Minimum use specifications Manufacturer and model (part number) AC MEASUREMENT STANDARD Range: 20 Hz to 120 kHz 2.97 mV to 16.256 V Accuracy: .125% John Fluke, Model 5790A (5790A) CALIBRATOR Range: 3 to 300 V dc Accuracy: 0.2755% Range: 20 Hz to 100 kHz, 30 mV to 300 V Accuracy: .25% Range: 220 Hz , 1 mV Accuracy: .2.5% John Fluke, Model 5720A/CT (p/o MIS-35947); w/power amplifier, John Fluke, Model 5725A (5725A MULTIMETER ACV range: 20 Hz to 100 kHz, 1 mV to 3 V rms Accuracy: 0.175% Hewlett-Packard, Model 3458A/E02 (3458A/E02) FREQUENCY COUNTER Range: 20 Hz to 140 kHz Accuracy: 2.5 ppm John Fluke, Model PM6681/656 (PM6681/656) SPECTRUM ANALYZER1 Range: 1 kHz <-75 dBm Hewlett-Packard, Model 3585A (MIS-35951) SYNTHESIZER/FUNCTION GENERATOR Frequency range: 1200 Hz to 80 kHz Attenuator Accuracy: 0.25 dB 1200 Hz 0.5 dB 80 kHz Agilent, Model 33250A (33250A) TIME however, misalignment of balance adjustments located after ac measurement accuracy can adversely affect this parameter. TB 9-6625-2271-50 8 9. Ac Measurement Accuracy a. Performance Check (1) Connect calibrator OUTPUT HI and LO to TI INPUT HIGH and LOW using balanced cable. (2) Press LCL INIT key. Press INPUT FLOAT key and verify INPUT FLOAT indicator is illuminated. (3) Set calibrator for a 3 mV, 1 kHz output. If TI indication is not between 2.970 and 3.030 mV, perform b below. (4) Repeat technique of (3) above using calibrator output settings and TI indications listed in table 4. Table 4. Ac Measurement Accuracy Calibrator output settings Test instrument indications (V) Amplitude (V) Frequency Min Max .03 1 kHz 29.70 m 30.30 m .3 1 kHz 297.0 m 303.0 m 3 1 kHz 2.970 3.030 30 1 kHz 29.70 30.30 300 1 kHz 297.0 303.0 .003 50 Hz 2.970 m 3.030 m .03 50 Hz 29.70 m 30.30 m .3 50 Hz 297.0 m 303.0 m 3 50 Hz 2.970 3.030 30 50 Hz 29.70 30.30 300 50 Hz 297.0 303.0 .003 49 Hz 2.940 m 3.060 m .03 49 Hz 29.40 m 30.60 m .3 49 Hz 294.0 m 306.0 m 3 49 Hz 2.940 3.060 30 49 Hz 29.40 30.60 200 49 Hz 196.0 204.0 .003 20 Hz 2.940 m 3.060 m .03 20 Hz 29.40 m 30.60 m .3 20 Hz 294.0 m 306.0 m 3 20 Hz 2.940 3.060 30 20 Hz 29.40 30.60 200 20 Hz 196.0 204.0 3 100 kHz 2.940 3.060 30 100 kHz 29.40 30.60 200 100 kHz 196.0 204.0 .003 51 kHz 2.940 m 3.060 m .03 51 kHz 29.40 m 30.60 m .3 51 kHz 294.0 m 306.0 m TB 9-6625-2271-50 9 b. Adjustments NOTE All adjustments interact and must be performed in their entirety. After making adjustments in this section, it is necessary to return to beginning of procedure. (1) Connect spectrum analyzer input to TI MONITOR (rear panel). (2) Connect TI OUTPUT HIGH to INPUT HIGH and LOW using tee connector and two cables. (3) Press keys and enter values using DATA ENTRY keys as listed in (a) through (g) below: (a) LCL INIT. (b) INPUT FLOAT (assure illumination). (c) SPCL. (d) 28 ENTER. (e) SOURCE LEVEL. (f) 3 V. (g) ANALYZER LEVEL. (4) Adjust spectrum analyzer controls to observe a 1 kHz signal. (5) Alternately adjust A0R29 and A0C35 (fig. 3) for minimum indication on spectrum analyzer (R). (6) Press SPCL key and enter 27 ENTER using DATA ENTRY keys. Adjust A0R12 (fig. 3) for minimum indication on spectrum analyzer. (7) If <-75 dB was not achieved in (5) or (6) above, then alternately adjust A0C5, A0C10, and A0R12 (fig. 3) for minimum indication on spectrum analyzer (R). Figure 3. Input board - adjustment locations. R12 R7 R29 C32 C33 C10 C5 C35 A0 BOARD FRONT TOP VIEW TB 9-6625-2271-50 CHANGE 1 10 (8) Press SPCL key and enter 26 ENTER using DATA ENTRY keys. (9) Adjust A0R7 (fig. 3) for minimum indication on spectrum analyzer (R). (10) If 70.7 percent. (6) Set calibrator frequency to 32.01 kHz. TI will indicate 70.7 percent. (11) Set calibrator frequency to 84.01 kHz. TI will indicate 70.7 percent. (16) Set calibrator frequency to 240.1 kHz. TI will indicate <70.7 percent. b. Adjustments. No adjustments can be made. 12. Distortion Measurement Accuracy a. Performance Check (1) Connect TI OUTPUT HIGH to INPUT HIGH using short shielded cable. (2) Connect calibrator OUTPUT HI and LO to TI INPUT LOW . (3) Press keys and enter values using DATA ENTRY keys as listed in (a) through (h) below: (a) LCL INIT. (b) INPUT FLOAT (assure illumination). (c) SOURCE FREQ. (d) 21 Hz. (e) SOURCE LEVEL. (f) 1 V. (g) ANALYZER DIST. (h) dB. (4) Set calibrator for a 1 mV, 222 Hz output. If TI indication is not between - 59 and -61 dB, perform b below. (5) Press TI SOURCE FREQ key and enter 1 kHz using DATA ENTRY keys. If TI indication is not between -59 and -61 dB, perform b below. (6) Repeat technique of (5) above using TI SOURCE FREQ settings and indications listed in table 6. TB 9-6625-2271-50 13 Table 6. Distortion Measurement Accuracy at -60 dB Test instrument SOURCE FREQ settings Test instrument indications (dB) (kHz) Min Max 19.99 -61 -59 21 -62 -58 50 -62 -58 100 -62 -58 (7) Set calibrator for a 10 mV, 222 Hz output. Repeat technique of (5) above using TI SOURCE FREQ settings and indications listed in table 7. Table 7. Distortion Measurement Accuracy at -40 dB Test instrument SOURCE FREQ Test instrument indications (dB) settings Min Max 21 Hz -41 -39 1 kHz -41 -39 19.99 kHz -41 -39 21 kHz -42 -38 50 kHz -42 -38 100 kHz -42 -38 (8) Connect calibrator OUTPUT HI and LO to TI INPUT LOW. (9) Set calibrator for a .1 V, 222 Hz output. Repeat technique of (5) above using TI SOURCE FREQ settings and indications listed in table 8. Table 8. Distortion Measurement Accuracy at -20 dB Test instrument SOURCE FREQ Test instrument indications (dB) settings Min Max 21 Hz -21 -19 1 kHz -21 -19 19.99 kHz -21 -19 21 kHz -22 -18 50 kHz -22 -18 100 kHz -22 -18 TB 9-6625-2271-50 14 b. Adjustments NOTE The adjustments provided are for the notch filter. These adjustments will not affect distortion accuracy; however, capability will be enhanced by lowering residual distortion. Perform the following only if TI indications are high. (1) Connect TI OUTPUT HIGH to INPUT HIGH and OUTPUT LOW to INPUT LOW. (2) Press keys and enter values using DATA ENTRY keys as listed in (a) through (d) below: (a) LCL INIT. (b) SOURCE LEVEL. (c) 3 V. (d) ANALYZER DIST. (3) Adjust A2R57 and A2R58 (fig. 4) for minimum distortion indication on TI. A2 NOTCH BOARD R57 R58 TOP VIEW Figure 4. Distortion measurement - adjustment locations. 13. Output Frequency Accuracy a. Performance Check (1) Connect TI OUTPUT HIGH to frequency counter CHANNEL A input. (2) Press keys and enter values using DATA ENTRY keys as listed in (a) through (e) below: (a) LCL INIT. (b) SOURCE LEVEL. (c) 1 V. (d) SOURCE FREQ. (e) 21.111 Hz. TB 9-6625-2271-50 CHANGE 1 15 (3) Adjust frequency counter controls for a stable display. If frequency counter indication is not between 21.110 and 21.112 Hz, perform b below. NOTE Values in parenthesis are for model 1121. (4) Enter 322.22 Hz using DATA ENTRY keys. Frequency counter will indicate between 322.2068 (322.2065) and 322.2332 (322.2335) Hz. (5) Repeat technique of (4) above using TI SOURCE FREQ and frequency counter indications listed in table 9. Table 9. Output Frequency Accuracy Frequency counter indications (Hz) 1120/S-10 1121 Test instrument SOURCE FREQ (Hz) Min Max Min Max 433.33 433.3157 433.3443 433