Nokia RH-30 Series Troubleshooting Instructions page 25

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.
ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn
Phase difference should be 90 degrees between RX I and Q signals at all bands.