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. For more detailed information, see section Service Tools and Service Concepts.
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/GSM900 0.2 dB
GSM1800 0.3 dB
GSM1900 0.3 dB
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 autotuning, 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-xx*
\rfconf_xx-x*.xml (
*= indicates the type designator of the phone.
)
Context
RF autotuning is performed with the aid of a digital radio communication tester (CMU200). Autotuning covers
all RF tunings that are needed to perform after RF component repairs.
Note: Do not perform RF autotuning without a proper reason. RF tuning 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.
3. Choose Tools→Options→GPIB Card .
4. From the Card Type drop-down menu, choose the GPIB card used, and click Start.
The name of the communication tester appears in the
Listeners
pane.
RM-180
RF Troubleshooting and Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –15
Copyright © 2006 Nokia. All rights reserved.
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