Philips 50 T Series, Service Manual

Page: 77 / 105

Receiver VCXO Test
Chapter 8 - RF Bench Repair
Figure 23 Receiver VCXO Test
The Spectrum Analyser should be set as follows:
START frequency 400 MHz
STOP frequency 500 MHz
Resolution Bandwidth 100 kHz
Video Bandwidth 100 kHz
Reverence Level +10 dBm
The Spectrum Analyser measurement must be:
Frequency Channel Fre 21 .400 MHz
+/- 5kHz
Level > - 6 dBm
2. If the level is lower the Receiver VCXO is to be replaced. If the
frequency and level are correct the Receiver Assembly needs to be
replaced.