User Guide

PAMS Technical Documentation 6 - Troubleshooting
NPE-4
Original ãNokia Corporation. Page 6-3
Hagar ..................................................................................................................... 36
EGSM Transmitter ............................................................................................................. 36
General instructions for EGSM TX troubleshooting ......................................... 36
Path of the transmitted EGSM signal .................................................................. 38
Hagar ..................................................................................................................... 38
PA ............................................................................................................................ 38
RX/TX Switch ....................................................................................................... 38
Fault finding chart for EGSM transmitter ........................................................... 39
PCN Transmitter ................................................................................................................40
General instructions for PCN TX troubleshooting ............................................. 40
Path of the transmitted PCN signal ...................................................................... 41
Hagar ..................................................................................................................... 42
PA ............................................................................................................................ 42
RX/TX Switch ....................................................................................................... 42
Fault finding chart for PCN transmitter .............................................................. 43
Synthesiser .......................................................................................................................... 44
General instructions for Synthesiser troubleshooting ..................................... 44
26 MHz reference oscillator (VCTCXO) ................................................................ 45
VCO ................................................................................................................................ 46
Fault finding chart for PLL Synthesiser ................................................................ 46
PLL Blockdiagram ....................................................................................................... 47
Frequency lists ............................................................................................................ 48
EGSM ..................................................................................................................... 48
PCN ......................................................................................................................... 49
SMD Guidelines for PA ..................................................................................................... 50
Removal instructions ................................................................................................ 50
Attachment instructions .......................................................................................... 50
Phoenix tuning ................................................................................................................... 52
RF tuning after repairs ............................................................................................. 52
RX Calibration ............................................................................................................. 52
EGSM ..................................................................................................................... 52
PCN ......................................................................................................................... 54
RX Band Filter Response Compensation .............................................................. 56
EGSM ..................................................................................................................... 56
PCN ......................................................................................................................... 56
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