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MAINTENANCE
WJ-8718-19/FE HF RECEIVER
4.3.6.4.2
Preselector (FE-A1A1A3) (794274) Alignment
1.
Deenergize the receiver.
2.
Connect the test equipment as shown in Figure 4-9.
Set
the Generator for 53.000 MHz, unmodulated, at
-64 dBm.
SIGNAL
GENERATOR
4-74
RF
OUT
o
O
50 I I
RF PROBE
Figure 4-9.
Preselector Alignment, Test Setup
3.
Open the Frequency Extender FE-Al and gain access to FE-
Al Al A3.
4.
Energize the receiver and tune to 53.00000 MHz.
5.
Select the 50 kHz IF Bandwidth position and adjust
C6 and C12 for a maximum RF Voltmeter reading.
6.
Tune the receiver and generator to 99.00000 MHz.
Adjust C8 and C13 for a maximum RF voltmeter
reading.
7.
Deenergize
the
receiver
and
disconnect
test
equipment.
10.
Replace the cover plate back on the Frequency
Extender.
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