Rf Description; Receiver (Rx) - Nokia 3555 Service Manual

RM-257; RM-270; RM-277
System Module
Figure 29 Block diagram of the GPS system

RF description

Receiver (RX)

An analogue signal is received by the phone's antenna. The signal is converted to a digital signal and is then
transferred further to the baseband (eg. to the earpiece).
The receiver functions are implemented in the RF ASIC.
Signals with different frequencies take different paths, therefore being handled by different components.
The principle of GSM and WCDMA is the same.
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