RF descriptionBlock diagramFigure 83 RF block diagram using RF ASIC N7505The RF block diagram uses RF ASIC N7505 that performs the RF back-end functions of receive and transmitfunction of the cellular transceiver.Receiver (RX)An analogue signal is received by the phone's antenna. The signal is converted to a digital signal and is thentransferred further to the baseband (eg. to the earpiece).The receiver functions are implemented in the RF ASIC.Signals with different frequencies take different "ways", being handled by different components. Theprinciple of GSM and WCDMA is the same.RM-179; RM-223System Module and User InterfacePage 6 –42 COMPANY CONFIDENTIAL Issue 1Copyright © 2007 Nokia. All rights reserved.
