Codan Radio MT-4R - Manual (Page 24)

UG-001 Daniels MT-4R and MT-4D Radio Systems
www.danelec.com
Chapter 3: P25 Radio System Confi gurations 16
User
Guide
ANALOG CONTROLLED BASE STATION OPERATION
Daniels P25 Analog Controlled Base Stations can be operated in encrypted or clear modes.
Encryption Mode Confi guration
Encryption mode requires the MT-4D Base modules. The MT-4D Base modules may have optional
DES-OFB or AES encryption modules installed in the receiver and transmitter. The MT-4D Base
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 a P25 base station with MT-4D Base modules. The MT-4D Base modules must be
used in the encryption mode confi guration, as they are the only radio modules capable of having the
optional encryption / decryption modules installed in them.
Figure 3-4: Encryption Mode P25 Analog Controlled Base Station shown with Base modules
P25 BASE
CONTROL
BNK
CI-BC-4E 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
PROGRAMMING PORT
DSP-223
PTT IC
HANDSET
POWER PTT MONITOR
FUNCTION
CTCSSLINE RX LINE TX
+
RADIO TX
+
RADIO RX
LINE TX LINE RX RADIO TXRADIO RXCTCSS
RADIO TX
-
GROUND LINE TX
-
FREQUENCY (MHz)
xxx.xxxx
MADE IN CANADA
P25 BASE RX
NORM
SQ . DI SA B L E
OFF
PROG
BUS
A
B
A D
RF N I
MADE IN CANADA Model # Code
MADE IN CANADA
DANIELS
ELECTRONICS LTD.
P25 BASE TX
MADE IN CANADA Model # Code
xxx.xxxx
PROG
BUS
A
B
MIC RF OUT
A D
OFF
KEY TX
NORM
FREQUENCY (MHz)
MADE IN CANADA
DANIELS
ELECTRONICS LTD.
SYSTEM MONITOR
VOL
AUDIO A
B
2
1
5
4
3
6 7
8
12
11
10
9
FUNCTION
METER
+ -
PTT
MADE IN CANADA
DANIELS
ELECTRONICS LTD.