Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 163

MAINTENANCE
WJ-8718-19/FE HF RECEIVER
Table 4-3. WJ-8718-19/FE HF Receiver Checkout Procedure. (Cont'd)
Step
6. MAN/AGC
Operation
(cont'd)
7. Freq.
Tuning
Accuracy
4-10
Test
Equipment
HP8640B
Boonton 92B
HP5303A
Control Settings and
Instructions
b. Increase Sig. Gen.
output to +3 dBm.
Reduce RF GAIN setting
until RF V.M. level is
-15 dBm or less.
c. Reduce Sig. Gen.
output to -87 dBm. Set
receiver to AGC FST.
Note AC V.M. reading.
d. Increase Sig. Gen.
Output to -7 dBm.
Note increase in AC
V.M. indication.
a. Set Sig. Gen. to
29.0000 MHz, -60 dBm,
unmodulated. Set rec
eiver to 29.00000 MHz
AM Mode, 6.0 kHz BW,
AGC FAST GAIN Mode.
b. Read IF Frequency
on Freq. Counter.
c. Increase both Sig.
Gen. and receiver to
53.99999 MHz.
d. Read IF Frequency
on Freq. Counter.
e. Increase both Sig.
Gen. and receiver to
99.99999 MHz.
f. Read IF Frequency
on Freq. Counter.
Normal
Indication
MAN GAIN
reduction
> 100 dB.
< 6 dB
increase, no
clipping.
455.000 kHz
+/- 100 Hz
455.000 MHz
+/- 100 Hz
455.000 MHz
+/- 100 Hz
IF Indication
is Abnormal
Refer to Table
4-4, step 6a
Refer to Table
4-4, step 6b
Refer to Table
4-4, step 7a
Refer to Table
4-4, step 7a
Refer to Table
4-4, step 7b