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INITIAL FM/AM-500
CONTROL SETTINGS: See Figure 1-2
KEY
CONTROL
4 Modulation Meter Range
Switch
9 Modulation Mode Selector
11 RF LEVEL Control
12 RF LEVEL FINE Adjust
Control
14 VAR TONE Selector Switch
15 1 kHz TONE Selector
Switch
17 Power Switch
24 GEN/LOCK Control
25 RF FREQUENCY Thumbwheels
26 GEN/REC Mode Switch
27 VOLUME Control
28 SQUELCH Control
CALIBRATION
POINTS: Reference Figure 4-1
SETTING
11
2 kHz/%xl0"
"FM NAR"
Fully clockwise
Fully clockwise
"OFF"
"OFF"
"OFF"
"LOCK"
11
120 000 0
11
"GEN"
Fully counterclockwise
Fully counterclockwise
STEP
PROCEDURE
[ti9t:�l
If any of the following calibration procedures
fails to produce the proper results, refer to
Corrective Maintenance Flowchart in Section 1
for appropriate corrective action.
1.
Connect Test Equipment as follows {see Figure 4-2):
2.
3.
4.
5.
a. For single input Modulation Meter, connect both, Modulation
Meter and Signal Generator to Directional Coupler and con
nect Directional Coupler to ANTENNA Jack {23) on Front
Panel.
b. For dual input Modulation Meter, connect Modulation Meter
to Signal Generator and to 30 dB Pad. Connect 30 dB pad
to ANTENNA Jack (23) on Front Panel.
Set Power Switch
warm-up period.
(17) in
II
LI NE"
Adjust R3368 as necessary until
0 (±0.1).
Set Signal Generator to produce
Set GEN/REC Mode Switch (26) in
4-20
position. Allow a 5 minute
MODULATION Meter ( 1) indicates
a 120 MHz cw carrier at 0 dBm.
"REC" position.
Summary of Contents for FM/AM-500
Page 152: ...DETAIL A 11 Figure 6 6 Dual vco 6 14 01 Assembl Y ...
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