Vctcxo Manual Tuning - Nokia 2125 Troubleshooting Manual

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2. Open the RF PDM dialog box component in RF.
Typical voltages observed are as follows:
• AFC PDM[0] = 1.3 V
• AFC PDM[-1024] = 0.8 V
• AFC PDM[1023] = 2.5 V

VCTCXO Manual Tuning

You can manually tune the VCTCXO to verify when a mobile terminal is tuned incorrectly
or if the mobile terminal cannot make a call. To verify, monitor the RF signal at the
output of the mobile terminal.
ISSUE 1 08/2005
Figure 22: RF PDM dialog box for AFC measurement
©2005 Nokia Corporation
2125/2125i/2126/2126i/2128i (RH-71)
RF Description and Troubleshooting
Company Confidential Page 31