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TM 11-5099 D E P a R T M E N T O F T H E a R M Y T E C H N I C a L M a N U a L SPECTRUM ANALYZER AN/UPM-58 This Reprint Inclu

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TM 11-5099 D E P a R T M E N T O F T H E a R M Y T E C H N I C a L M a N U a L SPECTRUM ANALYZER AN/UPM-58 This Reprint Inclu TM 11-5099 DEPARTMENT OF THE ARMY TECHNICAL MANUAL SPECTRUM ANALYZER AN/UPM-58 This reprint includes all changes in effect at the time of publication; changes 1 through 3. HEADQUARTERS, DEPARTMENT OF THE ARMY MAY 1957 Changes in force: C 1, C 2, and C 3 TM 11-5099 C3 CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY No. 3 } WASHINGTON, D.C., 4 May 1967 SPECTRUM ANALYZER AN/UPM-58 TM 11-5099, 28 May 1957, is changed as follows: Note. The parenthetical reference to previous Report of errors, omissions, and recommendations for changes (example: page 1 of C 2) indicate that pertinent Improving this manual by the individual user is material was published in that change. encouraged. Reports should be submitted .on DA Form Page 2, paragraph 1.1, line 6 (page 1 of C 2). Delete 2028 (Recommended Changes to DA Publications) and "(types 4, 6, 7, 8, and 9)" and substitute: (types 7, 8, and forwarded direct to Commanding General, U.S. Army 9). Paragraph 2c (page 1 of C 2). Delete subparagraph Electronics Command, ATTN: AMSEL-MR-NMP-AD, c and substitute: Fort Monmouth, N.J. 07703. c. Reporting of Equipment Manual Improvements. Page 77. Add section V after section 1V. Section V. DEPOT OVERHAUL STANDARDS 95.1. Applicability of Depot Overhaul Standards requirements for testing this equipment. The tests outlined in this chapter are designed to b. Technical Publications. The technical measure the performance capability of a repaired publication applicable to the equipment to be tested is equipment. Equipment that is to be returned to stock TM 11-5099. should meet the standards given in these tests. c. Modification Work Orders. Perform all 95.2. Applicable References modification work orders applicable to this equipment a. Repair Standard. Applicable procedures of the before making the tests specified. DA Pam 310-4 lists depots performing these tests and the general standard all available MWO's. for repaired electronic equipment given in TB SIG 355-1, 95.3. Test Facilities Required TB SIG 355-2, and TB SIG 355-3 form a part of the The following items are needed for depot testing: Item Technical manual Common name Directional Coupler CU-673/U............................... .................................................... Directional coupler Frequency Comparator CM-77A/USM................... TM 11-6625-493-15 Frequency comparator Frequency Converter CV-394/USA-5.................... TM 11-6625-604-15 Frequency converter Frequency Meter FR-38D/U.................................. TM 11-5057 Frequency meter Harmonic Mixer HP P932A................................... .................................................... Harmonic mixer Multimeter TS-352B/U.......................................... TM 11-6625-366-15 Multimeter Radar Test Set AN/UPM-60A................................ TM 11-6625-228-12 Transformer, Power CN-16A/U............................. .................................................... Transformer Variable Attenuator CN-491/G.............................. Waveguide Assembly CG-539/U.......................... TAGO 1656A-May 260-475*-67 1 95.4. General Test Conditions c. Set the AN/UPM-58 operating controls as All tests will be performed under the following follows: conditions: (1) Function switch: SPECTRUM. a. Input power of 115 volts, 60 cps, single phase. (2) DB: zero. b. Normal room temperature. (3) IF SENSITIVITY: maximum clockwise position. 95.5. Frequency Range Test (4) SPECTRUM WIDTH: Adjust. This test will be performed under the input power (5) MIXER AMPLIFIER: one-third clockwise conditions outlined in the chart below. position. a. Set the AN/UPM-58 controls as follows: (6) TUNING: Adjust to 16,000 ± 45 mcs. (1) FUNCTION switch: MIXER position. (7) SPECTRUM CENTER: Adjust. (2) SPECTRUM WIDTH: maximum counter- (8) SWEEP RATE: maximum counter- clockwise position. clockwise position. (3) MIXER AMPLIFIER: one-third clockwise d. At 16,000 mcs, set Radar Test Set AN/UPM-60A position. to a pulse width of 1 microsecond and to a repetition rate (4) SPECTRUM CENTER: midposition. of 200 pps. Adjust the AN/UPM-60A REFLECTOR (5) TUNING: midposition. control until a spectrum is visible on Spectrum Analyzer (6) FREQUENCY MC: Adjust. AN/UPM-58. (7) DB: 10. e. Adjust the AN/UPM-58 DB control for an (8) SWEEP RATE: to maximum clockwise optimum display of the spectrum. Adjust the AN/UPM-58 position. SPECTRUM WIDTH control for optimum display. At b. Center the bell-shaped mode with the least 20 discrete transients should be displayed. SPECTRUM CENTER control to measure the frequency range of the klystron. Extend it to cover the width of the 95.7. Sensitivity Test trace with the SPECTRUM WIDTH control. Use the a. Connect the AN/UPM-58 to a 115-volt 60-ops MIXER AMPLIFIER control to adjust its size as desired. line. c. Rotate the FREQUENCY MC control for a b. Set up the equipment as shown in figure 56.1. reading of 15,750 mcs on the dial. Vary the TUNING c. Set the AN/UPM-58 operating controls as follows: control and adjust the FREQUENCY MC control for a (1) Function switch: SPECTRUM. frequency meter dip. Frequency meter dip can be (2) DB: zero. located in the center of the mode with the TUNING control set for correct operation. (3) IF SENSITIVITY: maximum clockwise position. d. Repeat the procedures given in b and c above for a reading of 16,250 mcs on the dial. (4) MIXER AMPLIFIER: midposition. e. The frequency range input power conditions are (5) FREQUENCY MC: 15,795 mos. listed below. (6) TUNING: adjust until two pips appear at Line Test condition Result the sides of the screen. Input power Frequency (7) SPECTRUM CENTER: Center two pips on 1 105v/60 cps 15,750 mcs Frequency meter the CRT. dip in the center (8) SWEEP RATE: maximum counter- of mode. clockwise position. 2 125v/60 cps 16,250 mcs Same as in line 1. d. Tune the AN/UPM-60A to 15.750 gigacycles (gc), and adjust the AN/UPM-60A DBM control until a 1- 95.6. Resolution Test inch pip appears on the screen of the AN/UPM-58. a. Connect Spectrum Analyzer AN/UPM-58 to a e. The AN/UPM-60A DBM dial (with connection) 115-volt 60-cps line. should indicate 55 dbm or more down. b. Set up the equipment as shown in figure 56.1. f. Tune the AN/UPM-60A to 16.250 gigacycles and repeat the procedures given in c, d, and e above. TAGO 1656A 2 g. Tune the AN/UPM-60A to 16.00 gigacycles and g. Set the function switch to SPECTRUM and repeat the procedures given in c and d above. The adjust the AN/UPM-58 TUNING control until a spike is AN/UPM-60A DBM dial (with correction) should indicate displayed on the screen. Adjust the IF SENSITIVITY 60 dbm or more down. control as necessary. h. Adjust the FREQUENCY MC control for a dip in 95.8. Frequency Maker Test the spike amplitude. The FREQUENCY MC dial should a. Connect the equipment to a 115-volt, 60-cps indicate 15.755 gc ± 10 mc. line. i. Adjust the TUNING control to center the upper b. Set up the equipment as shown in figure 56.2. image spike. Adjust the FREQUENCY MC control for a c. Set the AN/UPM-58 operating controls as dip in the spike amplitude. The FREQUENCY MC dial follows: should indicate 15.845 gc ± 10 mc. (1) Function switch: MIXER. j. Repeat the procedures given in f through i above for the following test frequencies. (2) SPECTRUM WIDTH: maximum counter- AN/UPM-60A AN/UPM-38 clockwise position. Output frequency Marker (3) MIXER AMPLIFIER: one-third clockwise 16.00 gc............................. 15.955 gc ± 10 mc position. 16.045 gc ± 10 mc (4) SPECTRUM CENTER: one-half clockwise 16.20 gc............................. 16.155 gc ± 10 mc position. 16.245 gc ± 10 mc (5) DB: 30 dbm. (6) FREQUENCY - MC: 15,755 mcs. 95.9. Attenuator Accuracy Test (7) TUNING: Adjust. a. Connect the equipment to a 115-volt, 60-cps d. Adjust the AN, UPM-58 SPECTRUM CENTER line. control to center the mode in the middle of the screen. b. Set up the equipment as shown in figure 56.3. e. Adjust the AN/UPM-58 TUNING control until the c. Set the AN/UPM-58 opening controls as follows: dip caused by the wavemeter appears at the center of (1) Function switch: MIXER position. the mode. If necessary, recenter the mode by adjusting (2) SPECTRUM WIDTH: maximum counter- the SPECTRUM CENTER control. clockwise position. f. Set the AN/UPM-60A output frequency to 15.80 gc as calibrated with the CM-77A/USM and the counter. Figure 56.1. Resolution and sensitivity tests. TAGO 1656A 3 Figure 56.2. Frequency marker test. 4 Figure 56.3. Attenuator accuracy test. (3) MIXER AMPLIFIER: one-third clockwise g. Set the broadband variable attenuator to 50 db position. and adjust the AN/UPM-58 IF SENSITIVITY control to (4) SPECTRUM CENTER: Adjust. obtain a convenient reference reading on the screen. (5) DB: zero position. h. Adjust the AN/UPM-58 DB control until 5 db is (6) IF SENSITIVITY: Adjust. indicated on the dial. Decrease the external attenuator until the same signal level appears on the screen. (7) FREQUENCY MC: 15,795 gc. i. The sum of the external attenuator and the (8) TUNING: Adjust. AN/UPM-58 DB settings should be 50 ± 3 db and within d. Adjust the AN/UPM-58 SPECTRUM CENTER ± 1.0 db with the aid of the calibration chart. control to center the mode in the middle of the screen. j. Repeat the procedures given in h and i above in e. Adjust the TUNING control until the dip caused 5-db increments up to and including 45 db. by tile initial setting of the FREQUENCY MC control k. Repeat the procedures given in c through j appears at the center of the mode.
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