TM 11-6625-2946-14/TM 08168A-14/1
Table 5-2. Test Set Alignment Procedure--Continued
Step
Procedure
no.
RF POWER DETECTION AND METERING CIRCUIT ADJUSTMENT
( WITH POWER AMPLIFIER)
Connect equipment as shown in figure 5-4. Place test set FUNCTION switch in XMT position. Place power switches on rf signal gener-
19
ator and power amplifier in ON position and adjust them for an output of 54.05 MHz. Set wattmeter to the 2.5 watt range.
Connect output of power amplifier to wattmeter and adjust output of the rf signal generator for an indicated level of 0.5 watt on
20
watt meter.
21
Disconnect wattmeter and connect output of power amplifier to test set ANTENNA input.
Adjust 1A1A1R32 on test set meter function board for a reading of 5 divisions (midscale) on test set meter.
22
Disconnect test setup and reinstall test set in its case.
23
Procedure (AIternate)
RF POWER DETECTION AND METERING CIRCUIT ADJUSTMENT
( WITHOUT POWER AMPLIFIER)
Connect equipment as shown in figure 5-4A. Refer to figure 5-5 and adjust AN/PRC-68 Radio Set for a frequency of 54.05 MHz as
19a
follows:
Position
Switch
A
3
B
o
CHAN
o
D
1
Antenna Coupler (S 1 )
o
Connect output of the radio to wattmeter and adjust Cl on transmitter module for a 0.5 watt indication.
20a
Without disturbing any settings, disconnect radio from wattmeter and connect to test set, ANTENNA input.
21a
While holding PUSH TO TALK button on, adjust 1A1A1R32 on test set meter function board for exactly 5 divisions i(midscale).
22a
Disconnect test setup and reinstall test set in its case.
23a
5-6
