TN652 CI-RC-4M-G2 Multiple Link Controller
MT-4 Radio Systems
TECHNICAL NOTES
Page 8 of 10
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TECHNICAL NOTE:
TN652, REV 3-0-0, © Nov 2018
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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
DIGIT
A
L
NORM
OFF
KEY
TX
MIC
M
ODE
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
DIGIT
A
L
NORM
OFF
KEY
TX
MIC
M
ODE
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
6
7
8
11
10
9
FUNCTION
12
SYSTEM REGULA
T
O
R
MADE IN CANADA
VOL
METER
+
-
ON
OFF
SPKR
INT EXT
EXT
SPKR
ANTENNA
A
RX A
TX A
TRANSMITTER
CNTL
BUS
MIC
R
F OUT
AD
ANALOG
DIGIT
AL
NORM
OFF
KEY
TX
MIC
M
ODE
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
T
O
REMOVE
5
9
13
RX A
A
B
BNK
5
9
13
TX A
A
B
TX A
T
X
B
Secure
Clear
Zeroize
Key
Local
Disable
Enable
IP-223
TX
LNK
LINE
HANDSET
R
X
GND
TX+
IC
TX-
TX
RX
TX
TX+
TX-
RADIO 1
R
ADIO 2
TELEX
TELEX IP
BASED
CONSOLE
ANALOG AUDIO
INTERF
ACE
TELEX IP-223 OR IP-224
IP
REMOTE
ADAPTER
TELEX PROPRIET
AR
Y
DIGIT
AL
IP
INTERF
ACE
COMMON AIR
INTERF
ACE
LAN / W
A
N
RX & TX INTERCONNECT PORTS
TXA
RXA
T
XB
RXB
TXC
RXC
TXD
RXD
USB
MUL
T
IPLE LINK CONTROLLER - G2
VOL
SYSTEM REGULA
T
O
R
METER
+
-
MADE IN CANADA
ON
OFF
SPKR
INT EXT
EXT
SPKR
OFF
POWER
ON
2
1
5
4
3
6
7
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
6
7
8
11
10
9
FUNCTION
12
SYSTEM REGULA
T
OR
MADE IN CANADA
VOL
METER
+
-
ON
OFF
SPKR
INT EXT
EXT
SPKR
ANTENNA
A
A
NTENNA
B
RX A
R
X
B
TX A
T
X
B
The IP-223 keys up the UHF Base Station
T
ransmitter in Digital Mode.
The UHF
T
ransmitter can transmit
three dif
ferent 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
T
ransmitter (TXA) to
Air Guard,
Flight Following or
Air Detect.
P25 DIGIT
AL
LINK
Three VHF Receivers receive
on Flight Following (RXA),
Air Guard (RXC),
or Air
Detect
(RXD)
and
T
ransmit the Received signal
on the UHF
T
ransmitter (TXB).
ANALOG LINK
The UHF
T
ransmitter (TXB)
T
ransmits
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
L
V
DS 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
T
ransmitter (TXA).
VHF
TXA
Ch. 1 = 168.650 MHz / CTCSS 1
10.9 Hz = Flight Following
VHF
TXA
Ch. 2 = 168.625 MHz / CTCSS 1
10.9 Hz =
Air Guard
VHF
TXA
Ch. 3 = 168.750 MHz / CTCSS
TBD =
Air Detect