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