[Elecraft] RTTY on K2

[Brian Mury]

On Sun, 2004-07-11 at 21:15 +0100, rolf heidenborg wrote: 
> Have I missed something ? Is RTTY a hardware function and not a
> software managed with help of soundcard function in the K2 ?

RTTY uses FSK (frequency shift keying), which consists of shifting a
carrier between two frequencies. Some radios have an FSK mode where the
radio will generate the carrier, and shift it according to a digital
input from a TNC or a computer serial or parallel port. Kind of like CW
- the rig generates the carrier, it's controlled by a digital input (a
key).

If a rig doesn't have an FSK mode, you can use a TNC or computer
soundcard to generate the carrier at audio frequencies, and feed it into
the mic input. This is usually called AFSK (the A stands for audio).

Properly generated AFSK is indistinguishable from FSK.

-- 
73, Brian
VE7NGR