User Guide

Troubleshooting diagram for GSM1800 receiver

Troubleshooting flow

Figure 41 GSM1800 receiver troubleshooting

Results

By measuring with an oscilloscope at RXIP or RXQP on a working GSM1800 receiver this picture should be

seen. Signal amplitude peak-peak 114mV. DC offset 1.0V.

RM-512; RM-513; RM-514; RM-515; RM-543

RF Troubleshooting Instructions

Issue 2 COMPANY CONFIDENTIAL Page 4 –15