Gps Rf And Gps Bb Interface Checking - Nokia NPD-4 Series Troubleshooting - Gps

CCS Technical Documentation
Figure 17: GPS 16.368 MHz reference clock from TCXO at J009
9 Connect spectrum analyzer probe on test pad J003
10 Check that LO is active by measuring LO/8 signal, which should be within
196.416 MHz +/- 2.946 kHz

GPS RF and GPS BB Interface Checking

1 Next connect oscilloscope 10:1 probe into GPS_CLK output of the N001 between
pin D7 and J010
2 GPS 16.368 MHz system clock to GPS BB should look like the following picture:
Issue 1 02/2003
Figure 18: GPS 16.368 MHz reference clock to GPS BB
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Troubleshooting — GPS
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NPD-4
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