[Freetel-codec2] Oscillator precision and 2 KHz channels

[Bruce Perens]

I'm thinking about technical issues of purpose-built VHF/UHF radios for Codec2. We can deliver a modem capable of a 2 KHz digital voice channel on VHF/UHF. But can we get mobile oscillators precise enough to actually tune to that channel without resorting to external precision sources like GPS? In general, the oscillator would be the time-base for a DDS ASIC.

http://www.greenrayindustries.com/library/minitcxo.pdf

    Thanks

    Bruce

I found an interesting overview of the problems of mobile oscillator design at

<<attachment: bruce.vcf>>

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