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Codan-radio MT-4E Analog and P25 Digital - User Guide Manual de usuario Pagina 24

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USER GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Chapter 3: MT-4E Radio System Confi gurationsPage 16
ANALOG CONTROLLED BASE STATION OPERATION
The MT-4E modules operate in P25 clear mode or analog mode and may have optional DES-OFB /
AES encryption modules installed in the receiver and transmitter to operate in P25 encrypted mode.
The MT-4E modules are used with a CI-BC-4E base controller in order to properly connect the analog
audio from the receiver / transmitter modules to an external device (such as a tone remote adapter).
The base controller also has the ability to clear the encryption keys in the receiver and transmitter
through a “Zeroize Key” button on the front of the base controller. No other module has the capability
to zeroize encryption keys. Figure 3-4 shows an MT-4E analog controlled base station with a tone
remote adapter.
Figure 3-4: MT-4E Analog Controlled Base Station
The MT-4E modules used in a base station confi guration may also be confi gured as a P25 clear mode /
analog mode base station with repeat capability. See Repeater Operation with External Analog Wireline
Control section for more information.
An analog controlled base station is compliant with the P25 Analog Fixed Station Interface (AFSI).
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
TELEX
PROGRAMMING PORT
DSP-223
PTT IC
HANDSET
POWER PTT MONITOR
FUNCTION
CTCSS
LINE RX
LINE TX +
RADIO TX +
RADIO RX
LINE TX
LINE RX
RADIO TX
RADIO RX
CTCSS
RADIO TX -
GROUND
LINE TX -
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