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TM 11-5820-890-20-2
1-30
1.11
RADIO ANALOG RECEIVE PATH. Continued
b.
SINCGARS Radios Using the MX 10862/VRC.
J5
J4
J3
MOUNTING BASE
P1
RT OR RCU
P1
B
F
RF
B
HANDSET
POWER SUPPLY ADAPTER
CX-13314/VRC
D
J2
P
F
H
H
K
H
K
FIXED AUDIO
AUD/DATA
CABLE
CABLE
J1
TEST
CONNECTOR
N
AUD/FILL
TO ANTENNA
IF RT IS
PRESENT.
NOTE:
THE CX 13314/VRC CABLE IS
PRESENT ONLY IF AN LS 671
OR AN/VIC 1 (V) IS USED.
THIS CABLE CONNECTS THE PTT
LINE. SEE TRANSMIT SIGNAL
PATH FOR USE.
IF THE CX 13314/VRC IS NOT
PRESENT, CONNECT HANDSET
TO RT OR RCU AUD/DATA
CONNECTOR.
THE VARIABLE AUDIO LINES
ARE CONNECTED ONLY
AT THE MB AND NOT AT THE
PSA.
Voice signals are limited to the baseband bandwidth of 300 Hz to 3 kHz. The analog voice signal is
amplified and sent to the RT or RCU, AUD/DATA, AUD/FILL, and rear system connector P1. From the RT
or RCU rear system connector P1, the audio is sent directly to the PSA system connector P1 as fixed
audio. The fixed audio is also sent to PSA test connector J1 to aid in fault isolation during
troubleshooting.
The RT or RCU fixed audio lines are used both by the VIC and the LS 671.
The RT or RCU variable audio is used only if a handset is connected directly to the AUD/FILL or
AUD/DATA connector.
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