4. Connect the signal generator
to
the Receive
Antennajack. Set the deviation
to
±3KHz at
IKHz. Referto the chart andselect thechannel
3frequency.
5. Connectthe AFvoltmeter, distortion meter, and
SINAD meter
to
U421 pin
1.
6.
AdjustVR421
to
maximumcounterclockwise.
7.
Adjust
VC301,
VC302,
VC303,
VC304,
VC305 and VC306 for best SINAD.
8.
Increase signal generator output
to
I m
V.
9Adjust L422 for maximum audio.
lOA.
Version I: AdjustL421 and L422 forminimum
distortion.
lOB. Version
2:
Adjusut L421, L422 and L423 for
minimum distortion.
11.
Adjust VR420 for 140 mV
of
audio.
12.
Setthe signal generator output
to
I
!-tV.
13.
Adjust VR421 fully clockwise, then turn it
counterclockwise until the number 3LED
on
the front paneljust comes on.
14.
Set the signal generator to the channel Ifre-
quency and increase the output
to
1m
V.
15.
Move the audio hook up to U321 pin I.
16.
Adjust L322 for maximum audio.
17
A.
Version I: AdjustL321 and L322 for minimum
distortion.
17B. Version
2:
Adjust L321, L322, and L323 for
minimum distortion.
18.
Adjust VR320 for 140 mV
of
audio.
19.
Setthe signal generator output
to
I
!-tv.
20. Adjust VR321 fully clockwise, then turn it
counterclockwise until the number ILED on
the front paneljust comes on.
21. Set the signal generator
to
the channel 2fre-
quency and increase the output
to
I m
V.
22. Move the audio hook up
to
U371 pin I.
23. Adjust L372 for maximum audio.
24A. Version I: AdjustL371 and L372 for minimum
distortion.
24B. Version
2:
Adjust L371, L372, and L373 for
minimum distortion.
25. Adjust VR370 for 140 mV
of
audio.
26. Setthe signal generator output
to
1
!-tv.
27. Adjust VR371 fully clockwise, then turn it
counterclockwise until the number 2LED
on
the front paneljust comes on.
28. Set the signal generator
to
the channel 4fre-
quency and increase the output
to
I m
V.
29. Move the audio hook
up
to
U471 pin
1.
30. Adjust L472 for maximum audio.
31
A.
Version I: AdjustL471 and L472 for minimum
distortion.
31
B.
Version
2:
Adjust L471, L472, and L473 for
minimum distortion.
32. Adjust VR470 for
140
mV
of
audio.
33. Set the signal generator output
to
I
!-tv.
34. Adjust VR471 fully clockwise, then turn it
counterclockwise until the number 4LED on
the front paneljust comes on.
3-12