07
APPENDIX G: VIAVI 8800 TEST PROCEDURES
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
RECEIVER TESTING
Receiver Analog Testing
Connect the 8800 and Zetron Radio as shown in Figure G-4:
On the 8800, load Zetron preset 01 Rx Analog from your internal drive. Enter the correct RF frequency and
ensure that the deviation level of the 1.0 KHz tone is set correctly for your receiver (wide / narrow) in Gen 1.
Enter the correct CTCSS tone (if used) and deviation level for the tone in Gen 2. On the Zetron Radio system,
ensure the receiver is turned on and turn the System Regulator Speaker switch to ON and INT. Set the FUNCTION
rotary switch to position 3 for Rx A or position 5 for Rx B (depending on the receiver being tested), then turn the
volume up until the 1 KHz tone is audible.
In the Jumper Settings area of the Service section on the RSS, ensure that the “Subtones on audio path”
selection is set to “Don’t pass” as shown in Figure G-5. The 8800 will conduct all tests with CTCSS tones on the
audio, giving erroneous measurements, if the Subtones are set to “Pass”.
Figure G-4: Receiver Analog Testing
Figure G-5: RSS Subtone Settings
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
