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BT / WLAN antenna is a discrete component on the PWB.

RF tunings

Introduction to RF tunings

Phone RF is tuned in production. There is no reason to do the re-calibration unless:

• FLASH memory chip is corrupted.

Note: 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: Always use autotuning. Manual tunings are only required in rare cases.

Cable and adapter losses

RF cables and adapters have some losses. They have to be taken into account when the phone is tuned. As

all the RF losses are frequency dependent, the user have to be very careful and understand the measurement

setup. The following table presents the RF attenuations of the product-specific module jig:

Table 12 Attenuation values for galvanic RF connection Module Jig MJ-120

Band Tuning Channel Attenuation

Tolerance RX Attenuation TX Tolerance TX

GSM 850 190 -0.1 +/- 0.1 -0.1 +/- 0.1

GSM 900 37 -0.2 +/- 0.1 -0.1 +/- 0.1

GSM 1800 700 -0.5 +/- 0.1 -0.6 +/- 0.1

GSM 1900 661 -0.5 +/- 0.1 -0.5 +/- 0.1

WCDMA 2100 9750/10700 -0.6 +/- 0.1 -0.5 +/- 0.1

RF autotuning

Prerequisites

For information on the recommended test set-up, refer to the corresponding information on the Partner

Website or Nokia Online.

Before you can use the autotuning feature, the GPIB driver from the GPIB card vendor must be installed and

running.

The file used in autotuning must be in a correct place: C:\Program Files\Nokia\Phoenix\products\xx-x*

\rfconf_xx-x*.xml (

*= indicates the type designator of the phone, e.g. RM-208

)

Context

RF autotuning is performed with the aid of a digital radio communication tester.

Autotuning covers all RF tunings that are needed to perform after RF component repairs.

Note: Do not perform RF autotuning without a proper reason. Autotuning may only be performed

after component repairs or if the RF tuning information is lost.

Steps

1. Connect the communication tester to the GPIB bus.

RM-208

RF Troubleshooting and Manual Tuning Guide Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 7 –15