15
APPENDIX G: VIAVI 8800 TEST PROCEDURES
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Figure G-16: Receiver Reference Oscillator Testing
Receiver Reference Oscillator Adjustment
Connect the 8800 and Zetron Radio as shown in Figure G-16.
The reference oscillator test on the receiver requires a connection directly into the Synthesizer, which uses an
SMB connector. Disconnect the SMB cable from the LO output of the synthesizer and connect the small SMB-
SMB cable to the SMB jack that is mounted on the Synthesizer (beneath the RF Preselector). The SMB-BNC
adapter is required to connect this point to the ANT input on the 8800 as shown in Figures G-17 (VHF and UHF
400 MHz Receiver) and G-18 (UHF 700 / 800 / 900 MHz Receiver).
Synthesizer L.O. output
from Receiver to
ANT input on 8800
Computer running RSS
USB from
Computer to Rx
RECEIVER
OFF
NORM
SQ. DISABLE
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-17: VHF and UHF 400 MHz Receiver Reference Oscillator Connection
on 8800
SMB-SMB
cable
LO output of
synthesizer
To ANT input
