Switching The Rx Gain States; Checking Amps From Rf To Iq - Nokia 3155 Rf Description And Troubleshooting

3155/3155i (RM-41), 3152 (RM-61)
RF Description and Troubleshooting

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.
High Gain State (default)
Low Gain State

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 -25 to -35Bm IQ
tone for AMPS.
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Figure 26: RF Gen I/O dialog box
©2005 Nokia Corporation
Cell
AMPS
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Company Confidential ISSUE 1 07/2005