Receiver Verification And Troubleshooting; General Instructions For Rx Troubleshooting; Measuring Rx I/Q Signals Using Rssi Reading - Nokia NPL-4 Series Troubleshooting Instructions

NPL-4/5/RM-104
Troubleshooting Instructions

Receiver Verification and Troubleshooting

General instructions for RX troubleshooting

Connect the phone to a PC, which has Phoenix Service Software and a dongle installed,
using either
• Repair jig and DAU-9S (RS232) cable or
• DAU-9T cable (RS232) or
• DKU-5 cable (USB)
Connect the phone to a power supply (DC voltage: 4.0V, max. current: 3A) and an RF sig-
nal generator. Switch the phone on.
Start Phoenix Service Software and open FBUS connection.
- Select → Scan Product (Ctrl-R)
Wait until phone information (NPL-4 or NPL-5) is shown in the lower right corner of the
screen.
Follow the instructions below.

Measuring RX I/Q Signals using RSSI Reading

- Start Phoenix Service Software and open FBUS connection.
- Select → Scan Product (Ctrl-R)
Wait until phone information is shown in the lower right corner of the screen.
- Set operating mode to local mode
- Select → Testing → RF Controls
- Select → Band → GSM 850 or GSM 900 or GSM1800 or GSM1900
Active unit → RX
Operation mode → Burst
RX/TX Channel → 190 or 37 or 700 or 661
- Select → Testing → RSSI reading
In the RSSI Reading window the "measuring mode" shall be set on Sum vector and the
"reading mode" on Continuous.
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