User Guide

Figure 63 BT antenna

RF tunings

Introduction to RF tunings

Only perform RF tunings if:

• one or more of the RF components is changed

• A flash memory chip is changed or otherwise corrupted.

Caution: 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 results in a complete mistuning of

the RF side.

Important: After RF component changes, 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, you have to be very careful and understand the measurement

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

RM-49

Nokia Customer Care RF Troubleshooting and Manual Tuning Guide

Page 7 –14 COMPANY CONFIDENTIAL Issue 1