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Distorted
indicating
waveform
cutoff
during part of oper-
ation.
Check
Check
voltage
stage.
TP4 waveform.
biasing diode
in driver
Distortion in enve-
lope indicated by
white
streaks
in
envelope.
Envelope
squared
indicates saturation
of driver transistors
due
to
excessive
drive level, de-tuned
antenna system, open
in
driver
output
transformer, etc.
Check
for
over-
driving
(waveform
becomes clean when
drive is reduced).
iCheck final stage and
antenna system for
improper tuning or
impedance matching.
Reduce drive from AM
Oscillator PWB until
waveform is not dis-
torted,
then test
final stage.
120
Southern Avionics
Company
SS-800AVS
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