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 1.
Set 1A3 PRI switch to
A-W .
2. Terminate oscilloscope
in 1000 ohms, adjust
oscilloscope so first
pul
of
mea
0.2 VOLTS/DIV
SWEEP : 50 s/DIV
260 S
Min PRI
380 s
Max PRI
a. Check voltages of
BTS power supplies
1A3 PS1, 1A3 PS2,
1A3 PS3, and 1A3
PS4.
b.
Replace the two
circuits cards in
1A3. Reinstall
circuit cards if
there is no im-
provement.
Replace RF Modula-
c.
tion Assembly 1A3.
3-37
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