Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 223

MAINTENANCE
WJ-8718-19/FE HF RECEIVER
SIGNAL
GENERATOR
HF RECEIVER
RF VOLTMETER
RF
OUT
o
o
RF
INPUT
s
o
IF
OUT
JI20
O
-Q—CW>-&
50 SL
RFPROBE
IN
Q
o
Figure 4-6. 455 kHz Amplifier/AM Detector Gain Adjustment, Test Set
4.3.6.3.5
4-70
3.
4.
5.
6.
Energize the receiver.
Set the RF Voltmeter to the 100 mV scale.
Set the Signal Generator to 15.0050 MHz, unmodulated
at -97 dBm (3 V). Also tune receiver to 15.00500 MHz.
Adjust A4A7R7 for a 40 mV reading on the RF
Voltmeter.
7. Deenergize the receiver and disconnect test equipment.
FM Discriminator, p/o A4A9, (791599) Alignment
1. Deenergize the receiver.
2. Remove cards A4A7, A4A9, and A4A10.
3. Put A4A9 on an extender card.
4. Connect the test equipment as shown in Figure 4-7.
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