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 TM 11-6625-2884-30/NAVAIR 16-35TS3615-2
VARIABLE PRI CHECK (Continued)
d. Procedure
Set 1A3 PRI selector
switch to VAR PRI.
Set OUT SEL switch
to PULSE. Set
oscilloscope volts/
div to 0.2V, and set
sweep to 0.1 ms/div.
Note chain of pulses
on oscilloscope.
Pulse characteristics
negative going 0.2 V
zero to peak minimum.
PRI of 300 s.
are not as specified per-
form the following:
Check voltages of BTS
a.
power supplies 1A3 PS1,
1A3 PS2, 1A3 PS3, 1A3
PS4 and 1A2 PS1.
Set OUT SEL switch to
b.
CW. If a dc level is
indicated proceed to
corrective action (c).
If no dc level is
indicated, Status
Panel is faulty and
trouble must be
referred to depot level.
Replace the two circuit
c.
cards in the RF modula-
tion assembly. Rein-
stall circuit cards if
no improvement is noted.
Replace RF Modulation
d.
Assembly 1A3.
3-24
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