Nokia 6015 Troubleshooting - Rf page 47

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6. The next step depends on the type of measurement equipment you are using:
• Spectrum analyzer: Set the center frequency to 836.52MHz, set the span to
2MHz, and establish a marker at 836.52MHz.
• HP8960: Set the callbox System Type to AMPS, set the ACC channel to 384,
and use the Frequency Accuracy measurement to center the VCTCXO
(minimum Frequency Error).
7. Use the RF PDM value to adjust the AFC to center the VCTCXO. The tuning range
is approximately +/- 10kHz.
8. Adjust the AFC so that the output signal is within +/- 150Hz. If using the
spectrum analyzer, narrow the span to 1kHz or less.
9. If the VCTCXO does not tune, replace the UEM.
Issue 1 08/2004
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Figure 39: RF PDM dialog box
©2004 Nokia Corporation
Troubleshooting - RF
Company Confidential
Adjust AFC to
center VCTCXO
manually
Page 47