The antenna is functioning normally when the contacts function (RDC = 0 ohm) and the antenna is visually
intact.
BT antenna
BT antenna has one Feed and one GND contact. The antenna is functioning normally when the contacts
function (RDC = 0 ohm) and the antenna is visually intact.
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.
Cable and adapter losses
RF cables and adapters have some losses. They have to be taken in 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. In the following table there are RF attenuations of the module jig:
Band Attenuation
GSM850 0.2 dB
GSM900 0.2 dB
GSM1800 0.3 dB
GSM1900 0.6 dB
RF autotuning
Prerequisites
For information on the recommended test set-up, refer to the corresponding information on PWS/NOL.
Before you can use the auto-tune feature, the GPIB driver from the GPIB card vendor must be installed and
running.
The autotune .ini file must be in a correct place: C:\Program Files\Nokia\Phoenix\products\xx-x*
\autotune_xx-x*.ini (
*= indicates the type designator of the phone, e.g. RM-1
)
Context
RF autotuning is performed with the aid of 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. Phones are tuned in production and
an RF tuning may be performed only after component repairs or if the RF tuning information is lost.
Steps
1. Connect the communication tester to the GPIB bus.
RM-88
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –17
Copyright © 2006 Nokia. All rights reserved.
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