Nokia NPD-4 Series Troubleshooting - Gps page 22

NPD-4
Troubleshooting — GPS
4 Execute
5 Connect oscilloscope 10:1 probe to test pad J062
6 CDMA 19.2 MHz system clock to GPS should look like the following picture:
7 Connect oscilloscope 10:1 probe to test pad J009
8 GPS 16.368 MHz system clock for GPS RF ASIC N001 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 16: GPS 16.368 MHz reference clock from TCXO before C029
Page 22
Figure 15: CDMA 19.2 MHz reference clock to GPS
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 02/2003