Gps Settings For Phoenix; Quick Test Window - Nokia N900 Service Manual

RX-51
BB Troubleshooting
Figure 15 GPS layout and basic test points

GPS settings for Phoenix

Quick Test window

This test will perform 3 tests in one: Self test, Oscillator Test and CW Test and will provide a Pass/Fail Response
for each. The HW Self Test confirms basic communication with the GPS ASIC. The oscillator test confirms the
frequency accuracy of the GPS TCXO against the Ref_Clk. The CW Test confirms end-to-end connectivity
between the GPS antenna and the GPS ASIC. It also contains a receive button.
Before this test is performed a known good phone should be tested in order to calibrate the setup. The signal
level of the Signal Generator should be adjusted so a reading of SNR 35 dB is achieved with the reference
unit. A good starting point is to set up the signal generator to -50 dBm.
These checks are part of GPS failure troubleshooting (page 3–57).
Page 3 –54 COMPANY CONFIDENTIAL Issue 1
Copyright © 2009 Nokia. All rights reserved.