23.
Adjust
T31O,
T311, T312, T313, and T314 for
maximum DC voltage at pin 5
of
U304.
24. Set the signal generator output to 1 mV and
adjust T315 for maximum audio at pin 7
of
U305.
25. Adjust VR304 for 140
mV
of
audio at pin 7
of
U305.
26. Set the signal generator output
to
1
~
Vand
adjust VR303
to
justextinguish the number 2
LED on the front panel.
27. Set the signal generator
to
the channel 3fre-
quency.
28. AdjustT316,
TIl?,
T318, T319, and T320 for
_maximum DC voltage at pin 5ofU306.
29. Set the signal generator output
to
1
mV
and
adjust T321 for maximum audio at pin 7of
U307.
30. Adjust VR306 for 140 mV ofaudio at pin 7
of
U307.
31. Set the signal generator output
to
1
~V
and
adjust VR305
to
just
extinguish the number 3
LED on the front panel.
32. Set the signal generator
to
the channel 4fre-
quency.
33. Adjust T322, T323, T324, T325 and T326 for
maximum DC voltage at pin 5ofU309.
34. Set the signal generator output
to
1 mV and
adjust T327 for maximum audio at pin 7
of
U31O.
35. Adjust VR308 for 140 mV
of
audio at pin 7
of
U31O.
36. Set the signal generator output
to
1
~
Vand
adjust VR307
to
just extinguish the number 4
LED on the front panel.
Receive
Board
-750309
EquipmentRequired:
DSignal Generator
DSensitive RF Voltmeter
DAudio Distortion Meter
DSpectrum Analyzer
or
VHF
Monitor
DAF Voltmeter-
DSINAD Meter
lA
Version
1:
Place the RF voltmeter probe tip
inside the top
of
L309 and adjust VC307 for a
peak indication.
1B
Version
2:
Place the RF voltmeter probe tip
inside the top of L313 and adjust VC307 and
VC308 for apeak indication.
2.
Connect the signal generator
to
ashottpiece
of
wire and set it
to
the oscillator frequency as
shown
in
the chart below:
3.
Using either aspectrum analyzer or aVHF
monitor, adjust L307 for azero beat.
Y30I Oscillator
CHI
CH2
CH3
CH4
Marking
171
R905 182.605 171.905 171.045 170.245 169.505
207 R800 218.5 207.800 207.425 206.800 206.000
213 R800 224.5 213.800 213.425 212.800 212.000
3-11