Nokia RH-3 Series Troubleshooting - Rf page 37

CCS Technical Documentation
1 GPS RF general checking
2 GPS reference clock checking
3 GPS RF and GPS BB interface checking
4 GPS RX chain checking
Fastest way to troubleshoot GPS RF is to follow the faultfinding chart.
Please note that before changing ASICs or filters, soldering and missing components
must be checked visually. There are no parameters in GPS RF, which should be tuned
externally. Accurate signal levels are not shown in the flowcharts below because of the
figures apply with specific measurement probes. It is useful to compare the results
against reference phones.
Test Equipment
1 Signal generator up to 2 GHz
2 Oscilloscope with 10:1 passive probe
3 High Frequency Probe for Spectrum Analyzer (Please note that the signal levels
mentioned in the RX troubleshooting have been measured with an active probe.)
4 Spectrum analyzer up to 6.7 GHz
5 PC with Phoenix SW and GPS option
Issue 1 06/2003
Nokia Corporation
Troubleshooting - RF
Confidential
RH-3
Page 37