User Guide

Checking antenna functionality

Main antenna

The main antenna has one antenna: GSM.

In the GSM antenna, there is one feed and one GND contact.

The antenna is functioning normally when it is visually intact and the antenna pins are intact.

BT antenna

BT antenna is a ceramic SMD antenna. The antenna is functioning normally when the contacts function (RDC

= 0 ohm) and the antenna is visually intact.

Figure 51 BT antenna, feed and GND spots of the main antenna

RF tunings

Introduction to RF tunings

Important: Only perform RF tunings if:

• one or more of the RF components is changed

• flash Memory chip is changed or otherwise corrupted.

RF calibration is always performed with the help of a product-specific module jig, never with an RF coupler.

Using an RF coupler in the calibration phase will cause a complete mistuning of the RF side.

Important: After RF component changes, always use autotuning. Manual tunings are only required

in rare cases.

RM-198

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –19