TM 11-5821-333-30
4-11. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 4. CT VOICE TEST. Continued
f. Set test adapter:
PTT(S8)
OFF
PT/CT
ON
S5,
S6
6
SQ/CLK
OFF
TEST EQUIPMENT
SELECTOR
DMM
g. On DMM, reverse connection of double ba-
nana to BNC adapter. (Connect GND to
h. Set DMM to 2 kilohm range.
i.
Set SQ/CLK switch on test adapter to ON
while observing DMM.
j.
Set PTT(S13) switch on test adapter to UUT
and check LAMP 7 on test adapter.
Step 5. CT DATA TEST
a. Set test adapter:
PTT(S13)
OFF
SQ/CLK
OFF
S5,
S6
7
TEST EQUIPMENT
SELECTOR
ICS
PTT(S13)
REF
b. Set SQ/CLK switch on test adapter to ON.
c. Listen for tones in headset.
d. Set test adapter:
PTT(S13)
OFF
S5,
S6
9
SQ/CLK
OFF
PTT(S13)
UUT
e. Set SQ/CLK switch on test adapter to ON.
f.
Listen for tones in headset.
f.
No response.
9.
No response.
h. No response.
i.
Resistance changes from less than 100
ohms to open circuit. If not, FSK detector
(A1) is bad.
j.
LAMP 7 is on. If not, go to chart 8.
a. No response.
b. No response.
c. Tones present. If not, go to chart 9.
d. No response.
e. No response.
f. Tones present. If not go to chart 10,
4-11
