[Elecraft] Evaluating Keying Characteristics

[Jim Brown]

On 6/12/2020 3:23 AM, E.H. Russell wrote:
> Thanks for the scope shot and info. I compared the waveform to the QST K3S review, which seems to show a little over 10ms before RF appears. Is this because they used different settings?

I repeat my advice that keying characteristics must be evaluated in the 
FREQUENCY domain (as occupied bandwidth), NOT in the TIME domain 
(oscilloscope). The reason has been stated here many times -- it's not 
only the TIME of the transition that determines bandwidth, it is the 
SHAPE of the transition from off to on and on to off that matters, NOT 
the time it takes, and this cannot be seen on a scope.

73, Jim K9YC