Nokia RH-3 Series Troubleshooting - Gps page 22

RH-3
Troubleshooting — GPS
4 Execute
5 Connect oscilloscope 10:1 probe to test pad J009
6 CDMA 19.2 MHz system clock to GPS should look like the following picture:
7 Connect oscilloscope 10:1 probe to test pad J006
8 GPS 16.368 MHz system clock for GPS RF ASIC N054 should be within +/- 256
Hz limits if tested with MCU/GPS Control/GPS Quick Test. The 16.368 MHz signal
looks like the following picture:
Figure 15: GPS 16.368 MHz reference clock from TCXO before C029
Page 22
Figure 14: CDMA 19.2 MHz reference clock to GPS
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 06/2003