TM 11-5821-333-30
2-23. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 8. SC TRANSMIT CHECKS
a. Set test adapter switches:
S1
3
TEST EQUIPMENT
SELECTOR
ICS
b. Set uut switches:
PRESET
MAN
FUNCTION
SQ ON
c. Set PTT(S8) on test adapter to UUT.
d. Speak into headset and listen to audio.
e. Set test adapter switches:
PTT(S8)
OFF
CAL
IN
f. Use channel 2 of scope and frequency
counter to set function generator for 1.0
kHz, 10±1 V peak-to-peak square wave.
g. Set test adapter switches:
TEST EQUIPMENT
SELECTOR
SCOPE
S1
4
h. Set PTT(S8) on test adapter to UUT and
check scope channel 1.
Step 9. SC RECEIVE CHECKS
a. Set test adapter switches:
PTT(S8)
OFF
S1
5
CAL
OUT
b. Set function generator attenuator to 40 dB.
c. Set TEST EQUIPMENT SELECTOR on test
adapter to ICS.
a. No response.
b. No response.
c. No response.
d. Clear and intelligible audio is present. If
not, go to chart 15.
e, No response.
f.
No response.
g. No response.
h. Scope displays 6 V peak-to-peak or
greater square wave. If not, set PTT(S8)
to OFF and go to chart 16.
a. No response.
b. No response.
c. No response.
2-24
