User Guide

6255/6255i/6256/6256i (RM-19)
RF Description and Troubleshooting Nokia Customer Care
Page 38 ©2005 Nokia Corporation Company Confidential Issue 2 05/2005
Switching the Rx Gain States
Use the RF Gen I/O dialog box to switch the gain state (Hi and Lo) for CDMA and AMPS
modes.
Figure 28: RF Gen I/O dialog box
Checking AMPS from RF to IQ
Use the following steps to check the AMPS receiver functionality from RF to IQ output.
1. Start Phoenix in Local Mode with only the Rx path turned on.
2. Inject a –75dBm CW signal of 881.53MHz (i.e. 10kHz offset from 881.52MHz)
into the RF.
3. Measure a 10kHz tone on the analyzer. You should see a typical -20Bm IQ tone
for AMPS.
High Gain State (default)
Low Gain State
PCS
CDMA
AMPS
Cell