Reference oscillator
A 38.4MHz VCTCXO is used as a reference oscillator for the frequency synthesizers.
The frequency of the reference oscillator is locked into the frequency of the base station with the help of an
AFC voltage, which is generated in BB by DSP and converted by dedicated DAC.
Frequency mappings
GSM850 frequencies
RM-91; RM-92
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 9 –47
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