TM 11-5821-333-30
2-23, OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 17. RETRANSMIT CHECKS. Continued
o. Check scope channel 1.
p. Check lamps on test adapter.
Step 18. SIDETONE CHECKS
a. Set function generator attenuation to 40 dB.
b. Set rf signal generator output level to -120
dBm.
c. Set uut FUNCTION switch to SQ ON.
d. Set test adapter switches:
S2
8
TEST EQUIPMENT
SELECTOR
ICS
PTT (S8)
UUT
e. Speak into headset and listen to audio,
f. Set PTT (S8) on test adapter to OFF.
g. Set uut IFM RF PWR switch to LO.
h. Set PTT (S8) on test adapter to UUT.
i.
Speak into headset and listen to audio.
j.
Set PTT (S8) on test adapter to OFF.
Step 19. IFM CONTROL TEST
a. Set S2 on test adapter to OFF,
b. If uut is not RT-1476 or RT-1476A, go to step
e.
o. Scope display:
If not, switching module (A5) is bad.
p. LAMP 3 and LAMP 6 are lit. If not, switch-
ing module (A5) is bad.
a. No response.
b. No response.
c. No response.
d. No response.
e. Sidetone is present, If not, set PTT (S8)
on test adapter to OFF and go to chart
35.
f. No response.
g. No response,
h. No response,
i.
Sidetone is absent. If not set PTT (S8) on
test adapter to OFF and go to chart 36.
j.
No response.
a. LAMP 5 is on; LAMP 10 is off. If not, go
to chart 37.
b. No response,
2-34
