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Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Manual de usuario Pagina 62

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MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Chapter 5: Codan Radio System TestingPage 54
Duplex Digital Testing
Connect the IFR 2975 and Codan Radio as shown in Figure 5-42.
Figure 5-42: System Duplex Digital Testing
On the IFR 2975, recall Codan setup 12 (Dup_Dig) from your internal drive as shown in Figure 5-43.
Enter the correct RF frequencies for the receiver and transmitter, select the MOD TYPE to P25 and set
it for the SPEECH test pattern (or optionally the 1011 test pattern). Inject the correct NAC (and TGID
if programmed) in the DOWNLINK DATA section. Set the receiver and transmitter front panel switch to
NORM. The MIC MODE switch on the transmitter front panel can be set to either Digital or Analog (this
test does not make use of the front panel switch).
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
VOL
SYSTEM REGULATOR
METER
+
-
MADE IN CANADA
ON
OFF
SPKR
INT
EXT
EXT
SPKR
OFF
POWER
ON
2
1
5
4
3
67
8
11
10
9
FUNCTION
12
REPEATER
CONTROL
RX B
TX B
RX A
TX A
PULL DOWN
TO REMOVE
9
5
3
7
11
15
9
13
3
7
11
15
SWITCH A SWITCH B
Computer running RSS
USB from
Computer to Rx or Tx
Tx RF OUT to T/R port on IFR 2975
HELP
MODE
TAB
SHIFT
+
-
.
BKSP
HOLD
RETURN
ESC
ENTER
POWER
12
ABC
3
DEF
JKL MNOGHI
654
TUV WXYZPQRS
987
#0*
VOLUME
SQUELCH
GEN T/R ANT
125 W MAX
MIC AUDIO I/O
DVMCH2CH1SCOPETEST PORT
100V MAX 100V MAX 100V MAX
GEN port from IFR 2975 to RF IN on Rx
To T x
or Rx
Codan RJ45 cables
on front panel
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