17
APPENDIX G: VIAVI 8800 TEST PROCEDURES
MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
In the receiver RSS, enter the Service section and click on “Ref Oscillator”. The reference oscillator frequency is
shown as the “Target Synthesizer RF OUT”. Enter this RF frequency into the frequency on the 8800. The receiver
generates this frequency out of the Synthesizer into the 8800.
Monitor the RF Error on the 8800. To change the reference frequency, adjust the softpot slider in the RSS as
shown in Figure G-20. Adjust until the RF Error is as close to 0 Hz as possible. Click on the “Program” button to
program in the new Reference Oscillator softpot value.
Enter the L.O. Reference Oscillator Offset reading on the MT-4E Test Sheet.
Figure G-20: RSS Receiver Reference Oscillator Alignment