User Guide

Block diagrams

Figure 106 RF block diagram RM-100 using RF ASIC N7500

The RF block diagram for RM-100 uses RF ASIC N7500 as illustrated by the red border in the block diagram.

It can be seen that the module contains RF ASIC N7505 and all the baluns and filters, except GSM TX filters

and the WCDMA balun.

Frequency plan

Both, the receiver and the transmitter, are based on direct conversion architecture. The VCOs operate at the

channel frequency multiplied by two or four depending on the band of operation. This means that the

modulated baseband signals are directly converted up to the transmission frequency and the received RF

signals directly down to the baseband frequency.

RM-100

Nokia Customer Care System Module

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