RF tunings
Introduction to RF tunings
Phone RF is tuned in production. There is no reason to do the re-calibration unless:
• One or more of the RF components is changed
• FLASH memory chip (D5000) is changed or otherwise 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:
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, 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:
Band
Attenuation
GSM850
0.25dB
GSM900
0.25dB
GSM1800
0.4dB
GSM1900
0.45dB
WCDMA 1900
0.45dB
WCDMA 2100
0.5dB
RF autotuning
Before you begin
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 autotune .xml file 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-1
)
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.
2.
Start
Phoenix
service software.
RM-91; RM-92
RF Troubleshooting and Manual Tuning Guide
Nokia Customer Care
Issue 1
COMPANY CONFIDENTIAL
Page 7 –25
Copyright © 2006 Nokia. All rights reserved.
