Re: LF: Re: Question: Rotating Shift Encoder

["M. Bruno" <spin@inrete.it>]

At 09.52 14/11/99 -0000, you wrote:
> Geri,
>
> > I am currently looking into a way how to realize a simple way of doing FSK
> > with my DDS VFO.
> How about "VXO-ing" the clock oscillator? 
>
> Dave G3YXM.
I was thinking the same way. You need 5 Hz out of 137 kHz, that is
about 36 ppm (parts per million).

It is quite easy to shift an overtone crystal by this amount - use
a varicap, or a fixed cap switched by a transistor, or even a small
relay - orrendous, but the baud rate is so slow!

And you need not to play with the encoder.


73 - Marco IK1ODO

spin@inrete.it

Rivalta, ITALY JN35SA (N 45 01' 25.6", E 7 31' 09.4")