The RF module receives and demodulates the radio frequency signals from the base station and transmits
the modulated RF signals to the base station. It consists of the following functional sub-modules: Receiver,
Frequency Synthesizer and Transmitter.
Figure 56 RF block diagram
Frequency mappings
GSM850 frequencies
Channel
TX Freq
(MHz)
RX Freq
(MHz)
TX VCO Freq
(MHz)
RX VCO Freq
(MHz)
128
824.2
869.2
3296.8
3476.8
190
836.6
881.6
3346.4
3526.4
251
848.8
893.8
3395.2
3575.2
GSM900 frequencies
Channel
TX Freq
(MHz)
RX Freq
(MHz)
TX VCO Freq
(MHz)
RX VCO Freq
(MHz)
975
880.2
925.2
3520.8
3700.8
37
897.4
942.4
3589.6
3769.6
RM-824; RM-825; RM-826
System Module
Issue 2
NOKIA INTERNAL USE ONLY
Page 6 – 27
Copyright © 2012 Nokia. All rights reserved.
