User Guide

PAMS

Technical Documentation

NSE–8/9

Troubleshooting

Page 27

Issue 1 07/99

2. GSM Receiver

2.1 . General instructions for GSM RX troubleshooting

Start WinTesla–Service–Software and

Select: P

roduct Alt+p

and b

SM g

Select: Te

sting Alt+e

F Controls r

X Continuous Alt+r

nt. Mode Ch: 60 Alt+o, 60

Front E

nd On (if Front End is off,

Alt+e)

Apply a 947.0 MHz (channel 60) –50 dBm signal to MJS–13

RF–connector. This signal is tracked through RX–path and will make the

troubleshooting of the RX easier.

2.2 . Path of the received GSM signal

This path defines the general route of the received signal:

Antenna, Diplexer (Z503), Duplexer (Z500), CRFU3 (LNA N600), GSM

Filter (Z600), CRFU3 (Mixer N600), SAW 71MHz Filter (Z700), SUMMA

(N700), 13Mhz Filter (Z701), SUMMA, COBBA_GJP (N200).

The related component number(s) are defined inside (.).