Rf Tunings; Introduction To Rf Tunings; Autotuning - Nokia 2608 Service Manual

RM-376
R F Troubleshooting

RF tunings

I ntroduction to RF tunings
Important: Only perform
one or more of the RF
Flash memory chip is replaced or corrupted.
RF ca libration 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: After RF component replacements, always use autotuning. Manual tunings are only
re quired in rare cases.
Cable and adapter losses
RF ca bles and adapters have some losses. They have to be taken into account when the phone is tuned. As all RF
losse s 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.
Auto tuning
This phone can be tuned automatically.
Auto tune is designed to align the phone's RF part easier and faster. It performs calibrations, tunings and
mea surements of RX and TX. The results are displayed and logged in a result file, if initiated.
H ardware set up
Ha rdware requirements for auto tuning:
PC (Windows 2000/XP) with GPIB card
Power supply
Product specific module jig
Cables: CA-128RS (RF cable), CA-101
PK-83 AMS SW protection key
Service Software, Nokia CDMA L3 PST Fx.x (x.x means version number)
Issue1
RF tunings if:
components have been replaced
Micro USB cable, PCS-1 Power Service Cable and GPIB cable
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