User Guide

RF description

Block diagram

Figure 59 RF block diagram RM-176 using RF ASIC N7505

The RF block diagram for RM-176 uses RF ASIC N7505 that performs the RF back-end functions of receive and

transmit function 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 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 "ways", being handled by different components. The

principle of GSM and WCDMA is the same.

RM-244

System Module and User Interface

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