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APPENDIX G: VIAVI 8800 TEST PROCEDURES
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Duplex Digital Testing
Connect the 8800 and Zetron Radio as shown in Figure G-36.
On the 8800, load Zetron preset 09 Duplex Digital from your internal drive as shown in Figure G-37. Enter
the correct RF frequencies for the receiver and transmitter, and select the Generators - Modulation screen
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).
Figure G-36: System Duplex Digital Testing
TRANSMITTER
BUS
CNTL
MIC
RF OUT
A D
ANALOG
DIGITAL
OFF
NORM
KEY 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
TX B
REPEA
CONTROL
TER
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
T/R port on 8800
Tx RF OUT to
Computer running RSS
USB from
Computer to Rx or Tx
Zetron RJ45 cables
on front panel
GEN port from 8800
to RF IN on Rx
