TB 9-6625-2059-35
CAUTION
Before energizing or deenergizing amplifier-power supply,
make sure that RF POWER OUTPUT ADJ control is set to
RF OFF.
(3) Energize all equipment and allow at least 15 minutes for warm-up.
(4) Select a frequency of 30 MHz listed on wattmeter sensor test report.
(5) Compute wattmeter reading that corresponds to 4 W, using wattmeter output
calibration factor at 30 MHz.
(6) Adjust signal generator to 30 MHz.
(7) Adjust amplifier-power supply for full-scale indication on DEVIATION (kHz)
WATTS meter. If wattmeter does not indicate within 10 percent of reading computed in (5)
above, perform b (1) and (2) below.
(8) Adjust output power to 0 and set DEV/PWR switch to WATTS X10.
(9) Repeat (5) above, except for 40 W. Record indication.
(10) Adjust amplifier-power supply for a 40 W indication on DEVIATION (kHz)
WATTS meter. If wattmeter does not indicate within 10 percent of reading recorded in (9)
above, perform b (3) and (4) below.
(11) Set DEV/PWR switch to WATTS X100 and repeat (5) above for 50 W. Record
indication.
(12) Adjust amplifier-power supply for a 50 W indication on DEVIATION (kHz)
WATTS meter. If wattmeter does not indicate within 31 percent of reading recorded in
(11) above, perform b (5) below.
(13) Repeat technique of (2) through (13) above at 600 MHz.
b. Adjustments
(1) Adjust amplifier-power supply for wattmeter reading computed in a (5) above.
(2) Adjust A1A14R87 (fig. 1) until DEVIATION (kHz) WATTS meter indicates 4 W (R).
(3) Adjust amplifier-power supply for wattmeter reading computed in a (9) above.
(4) Adjust A1A14R89 (fig. 1) until DEVIATION (kHz) WATTS meter indicates 40 W
(R).
(5) Adjust amplifier-power supply for wattmeter reading computed in a (11) above.
Adjust A1A14R91 (fig. 1) until DEVIATION (kHz) WATTS meter indicates 50 W (R).
20. DE MOD Signal
a. Performance Check
(1) Connect multimeter cable to EXT ACC jack on TI.
(2) Connect multimeter to model MM-100E multimeter DE MOD jack.
(3) Set RF FREQUENCY MHz switches to 125 500 0 and AM-FM switch to AM.
