Codan Radio MT-4R - Manual (Page 21)

UG-001 Daniels MT-4R and MT-4D Radio Systems
www.danelec.com
Chapter 3: P25 Radio System Confi gurations 13
User
Guide
CHAPTER 3: P25 RADIO SYSTEM
CONFIGURATIONS
REPEATER OPERATION
The MT-4R and MT-4D Repeater modules may be confi gured to operate as a repeater, a repeater with
a link, a cross-band system or two independent repeaters using the CI-RC-4L repeater control card.
The repeater system can be set for analog only, P25 digital only, or mixed mode operation. In mixed
mode, the receiver determines the incoming signal (analog or digital) and transmits the same signal.
The receiver and transmitter modules connect to the CI-RC-4L repeater controller through RJ45 cables
as shown in Figure 3-1.
Figure 3-1: P25 Repeater System shown with two pairs of transceivers
The repeater controller is hardware jumpered to control the interconnection between the modules.
This allows the user to select the operation of this system (single repeater, dual repeater, repeater with
link, cross-band system, etc.) by setting jumpers. Receiver priority and simplex operation can also be
jumpered for certain confi gurations.
The RJ45 cables carry the signals from the receiver, through the controller to the transmitter(s). The
signals on the RJ45 cables are analog COR/PTT, digital COR/PTT and LVDS serial data. The LVDS
serial data is the digitized analog or P25 digital information that is passed through the repeater. Analog
audio is not passed through the RJ45 cables. The cables connect to either the A or B ports on the front
of the receiver and transmitter modules. The A and B ports are identical (the signals are in parallel).
The two ports allow the user to program the radio modules (the programming cable plugs into the same
ports), without removing the RJ45 jacks that are connected for operation.
VOL
AUDIO A
B
2
1
5
4
3
6 7
8
11
10
9
SYSTEM MONITOR
FUNCTION
METER
+ -
PTT
12
MADE IN CANADA
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ELECTRONICS LTD.
FREQUENCY (MHz)
xxx.xxxx
MADE IN CANADA
P25 RECEIVER
NORM
SQ . DI SA B L E
OFF
CNTL
BUS
A
B
A D
RF N I
MADE IN CANADA Model # Code
MADE IN CANADA
DANIELS
ELECTRONICS LTD.
P25 TRANSMITTER
MADE IN CANADA Model # Code
xxx.xxxx
CNTL
BUS
A
B
MIC RF OUT
A D
ANALOG
DIGITAL
OFF
KEY TX
NORM
MIC MODE
FREQUENCY (MHz)
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DANIELS
ELECTRONICS LTD.
REPEATER
CONTROL
RX B
TX B
RX A
TX A
CI-RC-4L PULL DOWN
TO REMOVE
FREQUENCY (MHz)
xxx.xxxx
MADE IN CANADA
P25 RECEIVER
NORM
SQ . DI SA B L E
OFF
CNTL
BUS
A
B
A D
RF N I
MADE IN CANADA Model # Code
MADE IN CANADA
DANIELS
ELECTRONICS LTD.
P25 TRANSMITTER
MADE IN CANADA Model # Code
xxx.xxxx
CNTL
BUS
A
B
MIC RF OUT
A D
ANALOG
DIGITAL
OFF
KEY TX
NORM
MIC MODE
FREQUENCY (MHz)
MADE IN CANADA
DANIELS
ELECTRONICS LTD.