TM 11-5821-333-30
2-23. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 15. FH RECEIVE CHECKS
a. Set test adapter switches:
PTT(S8)
OFF
S1
5
TEST EQUIPMENT
SELECTOR
ICS
b. Hold PTT(S8) on test adapter in REF position.
Speak into headset and listen to audio.
c. Set test adapter switches:
S1
9
TEST EQUIPMENT
SELECTOR
SCOPE
d. Hold PTT (S8) on test adapter in REF position
and check scope channel 1.
e. Set function generator attenuation to 40 dB.
f.
Load 87600 into CUE position of ref rt.
g. Set test adapter switches:
S1
OFF
CAL
OUT
h. Set ref rt switches:
MODE
SC
PRESET
CUE
FUNCTION
SQ ON
i.
Hold PTT (S8) on test adapter in REF position.
a. No response.
b. Clear and intelligible audio present. If not,
go to chart 25.
c. No response.
d. Scope displays 3.0 to 5.0 V peak-to-peak
square wave. If not, ECCM module (A3)
is bad.
e. No response.
f. No respons.
g. No response.
h. No response.
i.
UUT display reads “CUE”. If not, go to
chart 26.
2-30
