[RTTY] (no subject)

[Ed]

On 08/23/2011 06:26 PM, Joe Subich, W4TV wrote:
>
>   >  I may be missing something here, but how are the newer rigs generating
>   >  FSK ? Are they shifting xtals or just sideband tones ?
>
> Depending on the design they are using different approaches ... some
> are generating audio tones (at a fixed level relative to the carrier
> oscillator into the balanced modulator),  some are directly shifting
> the frequency of the carrier oscillator (a synthesizer, not a crystal)
> and one is directly generating the FSK signal using DSP at a low IF.
>
> 73,

So then none are using a true FSK generator ???

Ed W3NR