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•
Step
Control Setting
Channel Programming
Test Instrument
Connection
Adjust
Remarks
3
OFF/vOLUME control:
ON
SQUELCH control:
Fully counterclockwise
Channel Programming:
CH4 (250 MHz -NFM)
Connect Signal
Generator to TP1, DC
•
•
SSVM to TP2 and TP5
to ground.
(Figure 6)
•
Tl
T9
T10
Tll
T12
Alignment of NFM/AM 2nd IF
1) Set the Signal Generator frequency
to 48.5 MHz, 0.3 V output (NO
MOD).
2) Adjust Tl, T9, T10, Tll to maxi-
mum voltage at TP2.
.
3) Adjust T12 to minimum voltage
at
TP2, approx
.
O.2V on the DC SSVM.
NOTE: Perform these adjustment
by using the DC SSVM which is able
.
to measure to three decimal places
because of the output voltage óf
TP2 is low.
-
.
Figure 6
•
•
TP1
TP2
•
SJGNAL
UNIT
DCSSVM
GENERATOR
UNDER TEST
",
•
c TP5
",
•
•
•
Control Setting
Test Instrument
Adjust
Remarks
Step
•
Channel Programming
Connection
•
4
OFF/vOLUME control:
Connect Signal
T13
Alignment of 455 kHz NFM
ON
Generator to TPl and
Discriminator coil
SQUELCH control:
DC SSVM to TP4.
Set the Signal Generator frequencv' to
Fully CCW
(Figure 7)
48.5 MHz, 100 p.V output (NO MOD)
Channel Programming:
and adjust T13 for 3.8V (±0.1)
on.
the
CH4 (250 MHz - NFM)
•
DC SSVM.
•
-
Connect Signal
•
T6
Alignment of 10.7 MHz WFM
.
5
OFF/VOLUME control:
"
Generator to TPl and
•
Discriminator coil
ON
SQUELCH control:
DC SSVM to TP3.
Set the Signal Generator frequency to
Fully CCW
(Figure 7)
48.5 MHz, 100 p.V output (NO MOD)
Channel Programming:
and adjust T6 for 3.8V (±0.1) on the
•
CH5 (98 MHz - WFM)
DC SSVM .
•
Figure 7
TP1
TP30rTP4
SIGNAL
UNIT
DCSSVM
•
UNDER TEST
GENERATOR
.
r
.
"
",
-12 -
•
•
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