Gsm1800 (Dcs/Pcn) Transmitter; General Instructions For Gsm1800 Tx Troubleshooting - Nokia 616 Service Manual

TFE-4/RV-1
TF4 Technical Information

GSM1800 (DCS/PCN) Transmitter

General instructions for GSM1800 TX troubleshooting

Apply a RF-cable to the RF-connector and connected to measurement equipment (GSM
Test equipment, Powermeter, Spectrum Analyzer, or similar). Be sure to use at least a 10-
dB attenuator, otherwise the results may be incorrect.
Step 1: Setting up Phone and Phoenix
• Start Phoenix Service Software
• Open the FBUS connection
• Select File /Scan Product (Ctrl-R)
• Wait until phone information shows in the lower right corner of the screen.
• Set operating mode to local mode
• Activate RF-Controls
• Select Maintenance/ Testing/ RF Controls. Wait until the RF Controls window
pops up
• Select:
The setup should now look like this:
Step 2: Doing the Measurement
Now the measurement equipment should measure the following output signal from the
phone. P = +20dBm @ 1747.8MHz
out
If this is not the case, then go to the TX Troubleshooting section of this document for
troubleshooting.
Page 8b-58
Company Confidential
Band
Active unit
Operation mode
RX/TX Channel
TX PA Mode
TX Power Level
TX Data Type
Copyright © 2005 Nokia Corporation.
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Issue 2.0 Mar/2005