33
Appendix H: Viavi CX300 Tests
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Duplex Digital Testing
Connect the CX300 and Zetron Radio as shown in Figure H-34.
Figure H-34: System Duplex Digital Testing
On the CX300, load Zetron preset 09 Duplex Digital from your internal drive as shown in Figure H-35. Enter the
correct RF frequencies for the receiver and transmitter, and ensure that the Pattern is set for 1011 and inject
the correct NAC for the receiver. 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
BUS
CNTL
MIC
RF OUT
A D
DIGITAL
OFF
NORM
KEY
ANALOG
TX
MIC MODE
IN
REF
USB
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
RECEIVER
SQ. DISABLE
OFF
NORM
BUS
CNTL
A D
RF I N
IN
REF
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
6
7
8
11
10
9
FUNCTION
12
RX B
REPEA
CONTROL
TER
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
or Rx
To Tx
Computer running RSS
USB from
Computer to Rx or Tx
Zetron RJ45 cables
on front panel
Tx RF OUT to
RF DUPLEX on CX300
RF OUTPUT from
CX300 to RF IN on Rx
