User Guide

RH-20 Company confidential
CCS Technical Documentation
Page 24 Nokia Corporation. Issue 1 10/2003
(Defaults)
Apply 942.46771 MHz (channel 37 + 67.710 kHz offset), 1842.86771 MHz (channel 700
+ 67.710 kHz offset) or 1960.06771 MHz (channel 661 + 67.71 kHz) –90 dBm signal to
the RF-connector (remember to compensate for cable attenuation).
Measuring with an oscilloscope on "RXI" or "RXQ" following screens should be seen on a
working GSM900 , GSM1800 or GSM1900 receiver:
Figure 18: RX I/Q signal ,burst mode, input level –90dBm.
Receiver I or Q burst mode signal (channel 37) measured from testpoint RXI or RXQ with
942.46771 MHz signal, input level –90dBm at RF-connector.
Correct signal amplitudes approximately:
• GSM900~170mVpp
• GSM1800~140mVpp
• GSM1900~160mVpp
Signal part frequency 67.7kHz sine.
DC level of signal part is 1.35V. DC level can variate about +/-100mV between I and Q
signals and between different bands as well.