User Guide

5. Setup the signal generator to correspond the values in the

RX AGC Calibration

pop-up window and click

OK.

Frequency: 2141MHz

Level: –51 dBm + cable and adapter attenuations

Modulation: FM

Deviation: 500 kHz

Modulation frequency: 50 kHz

6. Check that the

Rx chain

value in

Tuning Results

is within the limits presented in the following table.

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

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

7. To close the

Rx AGC Alignment

window, click Close.

Rx band response calibration (WCDMA)

Context

There is a band rejecting filter for each WCDMA Rx band between the front end LNA and the mixer of an RF

ASIC. The amplitude ripple caused by this filter causes ripple to the RSSI measurement and therefore Rx band

response calibration is needed.

The Rx band response calibration can be done in two different ways. If the signal generator used supports

frequency sweep table, the calibration can be done as a part of the Rx calibration. If there is no support for

the frequency sweep table , it is possible to calibrate all necessary frequencies one by one.

The first set of steps shows how to perform the calibration without the signal generator sweep feature. The

alternative steps give instructions how to perform the calibration if the signal generator supports frequency

sweeps, and the calibration can be performed within the Rx AGC calibration.

RM-10;RM-24

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –41