TN650 CI-RC-4L Repeater Control Card
MT-4 Radio Systems
TECHNICAL NOTES
Page 1 of 2
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CODANCOMMS.COMTECHNICAL NOTE:
TN650, REV 6-0-0, © Nov 2018
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The CI-RC-4L repeater control card is a plug-in module which provides LVDS Serial Data routing, COR-PTT routing,
and receiver priority settings for an MT-4 repeater radio system. The repeater control card includes the following
features:
• jumper selectable LVDS Serial Data and COR-PTT routing (repeater confi guration).
• receiver priority setting jumpers for certain confi gurations (where required).
• jumpers for disabling LVDS Serial Data and COR-PTT routing on simplex links.
• optional CTCSS interface board for 1 of 10 CTCSS tone decode selection (used for custom systems only).
The MT-4 receiver and transmitter modules all plug into the CI-RC-4L repeater controller via cables that plug in to
the RJ45 jacks on the front panel of all the modules. The CI-RC-4L comes with four diff erent cable lengths to plug
into the four repeater receiver and repeater transmitter modules. If the system only uses two of the cables, the other
cables can be kept for future system expansion or as spare cables.
Optional frequency select rotary switches can also be mounted on the front panel of the repeater control card, giving
easy access to 16 pre-programmed receiver and transmitter operating frequencies. The CI-RC-4L has no external
audio or serial data and is used only for controlling repeater confi gurations. The repeater control card module
circuitry consists of three main jumper functions:
(1) Repeater Confi guration jumpers used to determine which receiver keys and routes data to which
transmitter.
(2) Receiver priority settings used to set receiver priority for certain repeater confi gurations.
(3) Additional jumpers for the CTCSS interface board and other miscellaneous functions.
TRANSMITTER
CNTL
BUS
MIC RF OUT
AD
ANALOG
DIGITAL
NORM
OFF
KEY TX
MICMODE
REF
IN
USB
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
RECEIVER
NORM
SQ. DISABLE
OFF
CNTL
BUS
AD
RF NI
REF
IN
USB
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
VOL
SYSTEM REGULATOR
METER
+
-
MADE IN CANADA
ON
OFF
SPKR
INT
EXT
EXT
SPKR
OFF
POWER
ON
2
1
5
4
3
67
8
11
10
9
FUNCTION
12
REPEATER
CONTROL
RX B
TX B
RX A
TX A
PULL DOWN
TO REMOVE
9
5
3
7
11
15
9
13
3
7
11
15
SWITCH A SWITCH B
TRANSMITTER
CNTL
BUS
MIC RF OUT
AD
ANALOG
DIGITAL
NORM
OFF
KEY TX
MICMODE
REF
IN
USB
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
RECEIVER
NORM
SQ. DISABLE
OFF
CNTL
BUS
AD
RF NI
REF
IN
USB
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
REPEATER
CONTROL
RX B
TX B
RX A
TX A
PULL DOWN
TO REMOVE
9
5
3
7
11
15
9
13
3
7
11
15
SWITCH A SWITCH B
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