18
APPENDIX G: VIAVI 8800 TEST PROCEDURES
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
TRANSMITTER TESTING
Transmitter Analog Testing
Connect the 8800 and Zetron Radio as shown in Figure G-21.
Figure G-21: Transmitter Analog Testing
On the 8800 load Zetron preset 05 Tx Analog from your internal drive. Enter the correct RF frequency on the
8800, set the MIC MODE switch on the front panel of the transmitter to Analog, and flip the other switch to KEY
TX (or set the switch to NORM and key the transmitter through the RSS).
AF Gen is configured to inject a 1.0 KHz tone at -8.0 dBm (0.308 Vrms) into the transmitter balanced input as
shown in Figure G-22.
Computer running RSS
USB from
Tx Balanced Audio Input
(to pins B18 and Z18)
Computer to Rx
Tx RF OUT to
T/R port on 8800
AUDIO OUT
TRANSMITTER
BUS
CNTL
MIC
A D
RF OUT
DIGITAL
OFF
NORM
KEY
ANALOG
TX
MIC MODE
IN
REF
USB
FREQUENCY (MHz)
MADE IN CANADA
MODEL # CODE
VOL
SYSTEM REGULATOR
METER
+
-
MADE IN CANADA
ON
OFF
EXT
SPKR
INT
EXT
SPKR
OFF
POWER
ON
2
1
5
4
3
6
7
8
11
10
9
FUNCTION
12
