User Guide

Min Typ Max Unit

Rx chain -6 1.5 3.5 6 dB

Low freq -5 -0.7 4.0 5

High freq -5 -0.7 4.0 5

• If the Rx gain is acceptable, click Yes to save the results to the phone.

• To close the window, click Close.

WCDMA transmitter tunings

Tx AGC & power detector (WCDMA)

Context

Tx AGC & power detector tuning has two purposes:

• to enable the phone to select the correct TxC value accurately in order to produce the required RF level

• to enable the phone to measure its own transmitter power accurately

There are two ways to perform the tuning. For an alternative method, see Alternative steps.

Steps

1. From the dropdown menus, set "Operating mode" to Local and "System mode" to WCDMA.

2. From the Tuning menu, choose WCDMA -> Tx AGC & Power Detector.

3. Click Start.

4. In the "Wide Range" pane, click Tune (the leftmost Tune button).

5. Setup the spectrum analyzer in the following way:

Center frequency: 1950.3 MHz

Span: 0 Hz

Reference level offset: Cable attenuations + adapter attenuation

Reference level: 14 dBm

Input attenuation: (20 dB) Manually select as small value as possible

for the mentioned reference level to minimize the

noise floor.

Resolution bandwidth: 30 kHz

Video bandwidth: 30 kHz

Sweep time: 20 ms

Detector: RMS detector

RM-1

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

Page 7–46 Company Confidential Issue 1