Autotuning For Bb5; Auto Tuning Procedure - Nokia n81 Service Manual

• one or more of the RF components have been replaced
• flash memory chip is replaced or 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 part.
Important:
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 RF losses are frequency dependent, the user has to act very carefully and understand the measurement
setup.
For RF attenuations of the module jig, please refer to the Service tools section.

Autotuning for BB5

This phone can be tuned automatically.
Autotune is designed to align the phone's RF part easier and faster. It performs calibrations, tunings and
measurements of RX and TX. The results are displayed and logged in a result file, if initiated.
Hardware set up
Hardware requirements for auto tuning:
• PC (Windows 2000/XP) with GPIB card
• Power supply
• Product specific module jig
• Cables: XRF-1 (RF cable), USB cable, GBIP cable and DAU-9S
• Signal analyser (TX), signal generator (RX) and RF-splitter
Phoenix preparations
Install the phone-specific data package. This defines the phone-specific settings.

Auto tuning procedure

1 Make sure the phone (in the jig) is connected to the equipment. Else, some menus will not be shown in
Phoenix.
Page 4 –30
After RF component replacements, always use autotuning. Manual tunings are only
Figure 38 Auto tuning concept with CMU200
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or one device including all.
RM-179; RM-223
RF troubleshooting
Issue 1