TN652 CI-RC-4M-G2 Multiple Link Controller
MT-4 Radio Systems
TECHNICAL NOTES
Page 8 of 10
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CODANCOMMS.COMTECHNICAL NOTE:
TN652, REV 3-0-0, © Nov 2018
CANADA/US +1 250 382 8268 | TOLL FREE +1 800 664 4066
Figure 8: Example Multiple Link Controller System with P25 Digital uplink
RECEIVER
NORM
SQ. DISABLE
OFF
CNTL
BUS
AD
RF NI
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
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
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
POWER AMPLIFIER
TX
G/F
VSWR
RF OUTPUT
RF INPUT
PWR CTRL
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
2
1
5
4
3
67
8
11
10
9
FUNCTION
12
SYSTEM REGULATOR
MADE IN CANADA
VOL METER
+
-
ON
OFF
SPKR
INT
EXT
EXT
SPKR
ANTENNA A
RX A
TX A
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
P25 BASE
CONTROL
BNK
PULL DOWN
TO REMOVE
5
9
13
RX A
A
B
BNK
5
9
13
TX A
A
B
TX A TX B
Secure
Clear
Zeroize
Key
Local
Disable
Enable
IP-223
TX
LNK
LINE
HANDSET
R
X
GND
TX+
IC
TX-
T
X
RX
TX
TX+
T
X-
RADIO 1 RADIO 2
TELEX
TELEX IP BASED
CONSOLE
ANALOG AUDIO INTERFACE
TELEX IP-223 OR IP-224
IP REMOTE ADAPTER
TELEX PROPRIETARY DIGITAL IP INTERFACE
COMMON AIR
INTERFACE
LAN / WAN
RX & TX INTERCONNECT PORTS
TXA RXA TXB RXB TXC RXC TXD RXD
USB
MULTIPLE LINK CONTROLLER - G2
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
POWER AMPLIFIER
TX
G/F
VSWR
RF OUTPUT
RF INPUT
PWR CTRL
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
2
1
5
4
3
67
8
11
10
9
FUNCTION
12
SYSTEM REGULATOR
MADE IN CANADA
VOL METER
+
-
ON
OFF
SPKR
INT
EXT
EXT
SPKR
ANTENNA A ANTENNA B
RX A RX B
TX A TX B
The IP-223 keys up the UHF Base Station
Transmitter in Digital Mode.
The UHF Transmitter can transmit
three different NACs to the UHF Receiver
at the High Site.
The UHF Receiver (RXB) Receives
one of three separate NACs
and changes the channel of the
VHF Transmitter (TXA) to Air Guard,
Flight Following or Air Detect.
P25 DIGITAL LINK
Three VHF Receivers receive
on Flight Following (RXA),
Air Guard (RXC),
or Air Detect (RXD)
and Transmit the Received signal
on the UHF Transmitter (TXB).
ANALOG LINK
The UHF Transmitter (TXB) Transmits
the received VHF signals back to the
UHF Base Station Receiver.
The Air Guard Receiver (RXC)
has High Priority.
The Multiple Link Controller can be
programmed to change channels
based on CTCSS (for an analog link)
or NAC (for a digital link).
The UHF Receiver (RXB) needs to connected via
LVDS serial data for the NAC detect and
also through the audio routing circuitry in
order to allow the P25 Digital to Analog conversion.
The UHF Receiver (RXB) de-vocodes the P25 Digital
signal and outputs audio that is routed to the
audio input of the VHF Transmitter (TXA).
VHF TXA Ch. 1 = 168.650 MHz / CTCSS 110.9 Hz = Flight Following
VHF TXA Ch. 2 = 168.625 MHz / CTCSS 110.9 Hz = Air Guard
VHF TXA Ch. 3 = 168.750 MHz / CTCSS TBD = Air Detect
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