Synthesizer; General Instructions For Synthesizer Troubleshooting - Nokia NPM-10 Series Troubleshooting Instructions

CCS Technical Documentation

Synthesizer

There is only one PLL synthesizer generating Local Oscillator frequencies for both RX and
TX in both bands (PCS and GSM). The VCO frequency is divided by two for PCS operation
or by four for GSM operation inside the Mjoelner IC.

General Instructions for Synthesizer Troubleshooting

Start the Phoenix-Service-Software and
Select: Product
Select: Maintenance
It is not possible to measure the output of the VCO (G600) directly as this component is
placed underneath a shielding can without detachable lid. However, with spectrum ana-
Issue 1 03/2003
NPM-10
Testing
RF Controls
Band
Active Unit
Operation Mode
RX/TX Channel
Nokia Corporation
Troubleshooting Instructions RF
GSM1900
RX
Continuous
661
Confidential
NPM-10
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