Nokia RM-291 Service Manual page 153

RM-291
RF troubleshooting Nokia Customer Care
By measuring with an oscilloscope at RXIP or RXQP on a working GSM1800 receiver this picture should be
seen. Signal amplitude 114mVp-p. DC offset 1.0V.
Results
Figure 100 1800 RX I/Q signal waveform
Issue 1 COMPANY CONFIDENTIAL Page 7 –15
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