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TM 11-5805-451-15
TABLE 5-3. OPERATIONAL PERFORMANCE TEST PROCEDURE (Cont)
(Refer to figure 7-1. )
PROBABLE
CAUSE OF
NORMAL
OPERATION
TEST
TROUBLE
INDICATION
LEVEL CHECKS 2 AND 3 DIRECTION (Cont)
c. Remove oscillator and
4
reterminate TB1-5, 6.
(Cont)
NOTE
Perform following steps
for 3 direction only.
a. Remove termination and
apply l&Hz test tone at
-5 dBm to TB1-9 & 10.
Faulty hybrid Al
-20 dBm
b. Measure level at TB3-1
& 2.
c. Remove oscillator and re-
terminate TB1-9 & 10.
NOISE TESTS - 2 AND 3 DIRECTION
NOTE
These tests are to be performed only if
amplifier AR1 is used in the circuit under
test. Noise tests are performed on the
amplifiers only if excessive noise is
suspected, or after an amplifier has been
repaired.
a. Remove hybrid Al
from its socket (52) and
set it aside.
b. Remove amplifier board
AR1 from its socket and
insert it into 53 (normal
position of amplifier board
AR2).
5-6

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