Nokia 2650 - Page 231

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Nokia Customer Care 8-System Module
4 COMPANY CONFIDENTIAL Issue 2 06/2005
Copyright © 2005 Nokia. All Rights Reserved.
Memory Module ............................................................................................... 28
Fold detection-switch ....................................................................................... 28
SIM Interface.................................................................................................... 29
SIM -reader .................................................................................................... 29
SIM switch and card detection ....................................................................... 30
Assembly ........................................................................................................... 31
...................................................................................................................Flex 31
Test Interfaces................................................................................................... 32
Connections to Baseband................................................................................ 32
Test points ....................................................................................................... 33
RF Functional Descriptions ............................................................................. 35
RF block diagram............................................................................................. 35
Frequency synthesizers................................................................................... 35
VCXO ............................................................................................................. 35
VCO ............................................................................................................... 35
PLL Synthesizer, Functional Description ....................................................... 36
Receiver........................................................................................................... 36
AGC ............................................................................................................... 36
Transmitter....................................................................................................... 37
Dual band FEM .............................................................................................. 37
Power control scheme ................................................................................... 37