11
APPENDIX G: VIAVI 8800 TEST PROCEDURES
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Receiver Digital / BER Testing
Connect the 8800 and Zetron Radio as shown in Figure G-10.
Figure G-10: Receiver Digital Testing
On the 8800, load Zetron preset 02 Rx Digital from your internal drive. Enter the correct RF frequency, and ensure
that the Pattern is set for 1011.
Inject the correct NAC as shown in Figure G-11 and ensure that the receiver is operating. There are no specific
measurements to make on this test, just verify that the receiver is operating.
Computer running RSS
Rx Balanced Audio Output
(from pins B26 and Z26)
USB from
Computer to Rx
T/R port from 8800
to RF IN on Rx
AUDIO IN
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
Figure G-11: Receiver Digital Check
