Results
By measuring with an oscilloscope at RXIP or RXQP on a working GSM1900 receiver this picture should be
seen. Signal amplitude 108 mVp-p. DC offset 1.0V.
Figure 65 1900 RX I/Q signal waveform
Measurement points in the receiver
Figure 66 RX measurements point of the control voltages to FEM N7700
RM-512; RM-513; RM-514; RM-515; RM-543
RF Troubleshooting Instructions
Page 4 –34 COMPANY CONFIDENTIAL Issue 2
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