[Elecraft] K3 data decode for dummies?

[Don Wilhelm]

Andrew,

I know you are not going to like this answer - but "it all depends"...

It depends on what data you are trying to receive (and send).

PSK D will decode PSK31 and generate PSK31 from the Paddle input 
characters or ASCII input from the computer (like K3Utility).
FSK D will decode RTTY and generate RTTY from the paddle input 
characters or ASCII input from the computer.
These 2 selections would normally be used if one is operating with NO 
computer connection and want to have a PSK31 or RTTY contact.

Now for soundcard generated data modes - if you are using RTTY, choose 
the AFSK A mode and set the rate (and mark frequency) at whatever you 
wish to use.  The computer application and the K3 settings should be the 
same (if they are different, it will not work right).
The AFSK A data mode allows use of the 'dual passband' DSP filter, and 
the K3 frequency displayed is the mark frequency.

For all other soundcard data modes (which can include RTTY), use DATA 
A.  This is the "normal"data mode and is just like SSB except that the 
compression is 1:1 and the TX EQ is set flat.  You will see the full 
waterfall display in your software application and you can use the usual 
'click on a signal' to copy or make a contact.

Just how the waterfall display looks and is responded to depends on the 
particular data mode that you intend to use.  Google on your particular 
mode of interest for more information.

73,
Don W3FPR

Andrew Moore wrote:
> Okay, I've got to ask for help now... I'm a geek and been a computer junkie
> since 1980 or so, but for the life of me I can't figure out how to get my K3
> to decode data modes.  All these choices: AFSK A at 45 bps, FSK D at 45, PSK
> D at 31, DATA A... and I feel like I've tried every permutation of mode,
> filter width, VFO tuning, etc.. and still come up with gibberish on the
> display.  How do I know if the signal is at 31 or 45 bps; which mode;
> etc...  Can someone give me a quick "how to get up and running fast and
> easy" tutorial?  I've successfully decoded data via a sound card on the PC
> before, but the K3's getting the better of me here.  Just want to try it out
> on receive... only do 40m CW here (100%), but since the capability is there,
> I'd like to try it out.
>
> Sorry for the newbie Q's
>
>