Nokia RM-626, Руководство по обслуживанию

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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
.
Figure 19 GPS Quick Test window
GPS control
Prerequisites
A flash adapter with RF connector connected to a PC with Phoenix service software is required. The GPS signal
should be connected to the RF connector. Calibrate the signal level with a known good phone. Signal level
will be high (approx -45 dBm) because it is a leakage connection.
Context
Use the following to test GPS using Phoenix.
Steps
1. Place phone to Flash Adaptor.
2. Start Phoenix service software.
3. From the File menu, select Scan Product and check that the correct product version is displayed.
RM-626
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 – 73
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