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TM 11-5820-890-30-5
5-10. OPERATIONAL CHECK. Continued
Step 4. SIGNAL STRENGTH CHECK.
Action
Response
a. Set RT RF: PA.
a. No response.
b. Press handset PTT switch and read RT SIG
b. SIG display reading is 8 or 9. If not, the
display.
decoder control (6A2) is bad.
Step 5. VSWR PROTECTION AND SIDETONE CHECKS.
Action
Response
a. Press the handset PTT switch and check
a. Sidetone is present. If not, the
for sidetone.
decoder control (6A2) is bad.
b. Disconnect W1 at 20 dB attenuator input
b. No response.
and connect it to 3 dB attenuator. Do not
terminate 3 dB attenuator output.
c. Press the handset PTT switch and check
c. Sidetone is present. If not, go to chart 6.
for sidetone.
d. Disconnect W1 at 3 dB attenuator input.
d. No response.
e. Press the handset PTT switch and check
e. Sidetone is not present. If it is present,
for sidetone.
go to chart 7.
f. Operational check is complete.
5-11
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