Nokia RM-12 Troubleshooting Instructions page 26

RM-12
CCS Technical Documentation
Figure 3: RX I&Q, phase difference 90 deg between signals
Detailed view of GSM900 continuous mode RX I and Q signals measured from testpoints RXI
and RXQ simultaneously.
Used channel 37, input signal 942.46771 MHz, level –90 dBm at antenna port, AGC setting 12.
Phase difference should be 90 degrees between RX I and Q signals at all bands.
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