Codan Radio MT-3 - Manual (Page 23)

MT-3 ANALOG RADIO SYSTEMS | USER GUIDE
Chapter 3: Analog Radio System Confi gurations Page 15
MULTIPLE LINK REPEATER OPERATION (DISCONTINUED)
The MT-3 modules may be confi gured to operate in a multiple link repeater confi guration of up to
four sets of transceivers. Many possible confi gurations are available such as a multiple cross-band,
multiple linked system or multiple repeaters using the AC-3M-96 and AC-3S-96 Master-Slave control
cards. The AC-3M-96 and AC-3S-96 control cards were discontinued in 2006. The MT-4E product line
is now used for all multiple link repeater confi gurations. The AC-3M-96 and AC-3S-96 allows jumper
selectable connections from any receiver to any transmitter.
The receivers, transmitters, AC-3M-96 and AC-3S-96 control cards are shown in Figure 3-3.
Figure 3-3: MT-3 Analog Multiple Link Repeater System shown with four pairs of transceivers
The AC-3M-96 and AC-3S-96 control cards are hardware jumpered to control the interconnection
between the modules. This allows the user to select the operation of this system (single repeater, dual
repeater, multiple linked repeater, cross-band repeater, etc.) by setting jumpers.
The AC-3M-96 and AC-3S-96 have no auxiliary connections for connecting external equipment.
The AC-3M-96 and AC-3S-96 are jumper selectable to allow for fi ltering of the CTCSS tones in the
control cards. The voice band fi lter in the receivers can be enabled for additional CTCSS fi ltering if
required, or to remove the CTCSS tones from the System Regulator speakers.
The motherboard carries the signals from the receiver, through the controller to the transmitter(s). The
signals on the motherboard are COR, PTT, Balanced Audio, Receiver Discriminator Audio, Receiver
Mute and Transmitter Subtone 1 Input. The connection between the AC-3M-96 (Master) and the AC-
3S-96 (Slave) control cards is accomplished though the use of a DB-25 ribbon cable connected to the
front panel of the control cards. The ribbon cable carries COR, PTT and Balanced Audio between the
control cards.
The AC-3M-96 and AC-3S-96 have a current draw of less than 23 mA each. The optional CTCSS
decoders / encoders have a current draw of less than 13 mA each. The optional DTMF decoder has a
current draw of less than 14 mA.
TX A
TX B
SLAVE
TX B
TX A
SLAVE
RX A
RX B
MASTER
AUDIO CONTROL
PULL DOWN
TO REMOVE
TX C
TX D
MASTER
TX D
TX C
MASTER
RX C
RX D
SLAVE
AUDIO CONTROL
PULL DOWN
TO REMOVE
MADE IN CANADA
2
1
5
4
3
6 7
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
2
1
5
4
3
6 7
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
T X
REFERENCE
INPUT
OFF
KEY TX
MIC
RF OUT
NORM
TRANSMITTER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
SQ . DI SA B L E
N
O
RM O
F F
RF N I
REFERENCE
INPUT
RECEIVER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
T X
REFERENCE
INPUT
OFF
KEY TX
MIC
RF OUT
NORM
TRANSMITTER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
SQ . DI SA B L E
N
O
RM O
F F
RF N I
REFERENCE
INPUT
RECEIVER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
T X
REFERENCE
INPUT
OFF
KEY TX
MIC
RF OUT
NORM
TRANSMITTER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
SQ . DI SA B L E
N
O
RM O
F F
RF N I
REFERENCE
INPUT
RECEIVER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
T X
REFERENCE
INPUT
OFF
KEY TX
MIC
RF OUT
NORM
TRANSMITTER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
SQ . DI SA B L E
N
O
RM O
F F
RF N I
REFERENCE
INPUT
RECEIVER
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE