Nokia RM-824 - Frequency; GSM850 Frequencies; GSM900 Frequencies

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
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