User Guide

22. Measure the WCDMA output power.

It should be around 21 dBm.

23. Click RF Stop and uncheck the "Max power limit" check box.

24. Repeat steps 19 to 23 for levels +19, +7, 0, -20 and –40 dBm levels.

The measured output power may not differ more than +-2 dB from the requested value at level +19dBm

and no more than +-4dB on lower levels.

Remember to stop the RF before sending new data.

Alternative steps

• Measure the wide range levels normally and write down the levels that are possible to measure.

• Click Finish.

• Click Options.

• Change the first wide range DAC value to 573 and change the number of tuning steps to 21.

• Change the spectrum analyzer reference level to –20 dBm and adjust the input attenuator to the lowest

value possible.

• In the "Wide Range" pane, click Tune and fill in the rest of values starting from the 19th level.

Tx band response calibration (WCDMA)

Context

Tx band response calibration is required to get compensation parameters for DSP algorithm in order for it to

handle frequency response variations (caused by SAW filter, PA and duplexer unidealities) in open loop power

control and maximum power limitation situations.

Steps

1. From the "Operating mode" dropdown menu, set mode to "Local".

2. From the Tuning menu, choose WCDMA -> Tx Band Response Calibration.

3. Setup the spectrum analyzer according to the following settings:

Frequency: 1950.3 MHz

Span: 100 MHz

Reference level offset: Cable attenuations + adapter attenuation

Reference level: 30 dBm

Input attenuation: Default

Resolution bandwidth: more than 4.7 MHz (i.e. 5MHz)

RM-84/99

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 Company Confidential Page 1–55