User Guide

Nokia Customer Care Troubleshooting - RF

6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)

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.

Figure 39: RF PDM dialog box

9. If the VCTCXO does not tune, replace the UEM.

Adjust AFC to

center VCTCXO

manually