User Guide

RAE-6/RA-4

Nokia Customer Care 7 - RF Description and Troubleshooting

52 COMPANY CONFIDENTIAL Issue 1 12/04

■ RF tunings after repairs

The following tunings have to be performed after repairs:

• Repairs in the Tx part require "Tx Power Level Tuning".

• When component replacements around the modulator area (RF path from

UEM via RF ASIC to RF PA) have been done, "Tx IQ Tuning" is additionally

required.

• In general Rx repairs, the front-end always requires "Rx Calibration" and “Rx

Band Filter Calibration” for all three bands.

• Repairs in the PLL circuit always require "Rx Calibration" of the low band.

• If the RF ASIC is replaced, all calibrations mentioned above have to be done.

Refer to Chapter 3, Service Software Instructions, for instructions on the above-mentioned tun-

ings.