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GPS RTC oscillator test
Context
The 26 MHz GPS TCXO is compared with the 32.768 kHz CE RTC Clk and the output is the GPS RTC offset (from
nominal frequencies).
Steps
1.
Place the phone in the flash adapter or connect a data cable to the phone.
Phoenix service software.
2.
Start
Bus Method (FBUS or USB) and Port from the Connections box.
3.
Select the
Choose File → Scan Product.
4.
Choose Testing → GPS Control.
5.
6.
Select the ME Test tab.
7.
Under Tests, check RTC OSC offset.
8.
Select Oscillator offset parameters.
9.
Type in the correct parameters:
•
RTC oscillator offset limit (Hz) : 1.5
10. Click Start test.
Results
The Offset result will be returned and should be within the limits of +-1.5 Hz.
Page 3 – 68
Figure 23 GPS IO tests
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BB Troubleshooting and Manual Tuning Guide
RM-701
Issue 1
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