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TM 11-5820-890-20-2
1-45
1.15.
REMOTE CONTROL UNIT (RCU), C 11561(C)/U.
a.
Characteristics and Configurations.
The function of the RCU is to remotely control the RT manpack and vehicular configurations with
integrated COMSEC capability in the unit itself. This addition provides secure communications to the
ICOM RT. There are four configurations that use an RT, RCU, and a vehicular mount. These include:
Manpack to Manpack, Vehicular to Vehicular, Manpack to Vehicular, and Vehicular to Manpack.
CY 8523 SERIES BATTERY BOX
RCU
RT
MANPACK
TO MANPACK CON
FIGURATION
VEHICULAR
TO
MANPACK
CONFIGURATION
VEHICULAR
TO VEHICULAR
CONFIGURATION
MANPACK
TO VEHICULAR
CONFIGURATION
E1
E1
E2
E2
P1
J1
P1
J1
E1
E2
E1A
or
E1B
E2A
or
E2B
RCU A
or
RCU B
J1
RT
P1
CY 8523 SERIES BATTERY BOX
J1
RCU A
or
RCU B
J7
E1A
or
E1B
E2A
or
E2B
E1A
or
E1B
E2A
or
E2B
VAA AM 7239 SERIES
RT A
or
RT B
P1
J7
P1
RCU
P1
J1
CY 8523 SERIES BATTERY BOX
J1
E1A
or
E1B
E2A
or
E2B
E1
E2
RT A
or
RT B
P1
VAA AM 7239 SERIES
VAA AM 7239 SERIES
VAA AM 7239 SERIES
Information is sent between the RT and the RCU by means of a two wire link (WD 1 or WD 14). The
two wire link allows the units to be connected up to 4 kilometers away from each other. Connection is
made to the binding posts on the CY 8523 series battery box or the VAA. Two types of information can
be sent on the two wire link: control information for the RT, and baseband communication for messages.
b.
Main Panel Displays.
When used with a companion RT, the main panel displays on the C 11561(C)/U give the operator the
required information for remote operation.
Like the RT 1523 series, the hold up battery (HUB) for the C 11561(C)/U is a lithium sulfur dioxide battery
used to retain internal memory when the unit is in standby operation. The HUB display informs the
operator when the battery is low. The HUB display will flash on and off when the battery voltage drops.
During self test the HUB display LED's are lit. The LED's remain lit until the entire RT display goes blank
or shows •GOOD" at the end of the test.
The receive signal display will light when the companion RT has received a signal.
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