[Elecraft] A Different View--K3 Reduced-bandwidth RTTY Analysis

[Wayne Burdick]

On Mar 25, 2013, at 1:23 PM, AG0N-3055 wrote:

>> Andy, K0SM has a very nice look at the K3 reduced-bandwidth FSK  
>> keying.
>> (Now available to all as Beta DSP rev. 2.8.)
>>
>> http://www.frontiernet.net/~aflowers/k3beta/
>
> I'm not a K3 owner, but that is quite impressive.  Very well done.    
> I'm
> wondering if there is any work being done along those lines for CW?


The K3 and KX3 use an optimal, raised-cosine (sigmoidal or S-shaped)  
keying envelope. As a result, both rigs have CW keying that's crisp  
but occupies very little bandwidth. The consensus is that it's just  
about perfect already.

73,
Wayne
N6KR