[Elecraft] KPA500 Issue

[David Woolley]

Key clicks don't require non-linearity.  They are the result of 
modulating with a signal that has an infinite bandwidth, because of the 
sharp transitions at leading and trailing edges.  That results in 
infinite side bands.  (Actually any signal that communicates information 
in finite time will have infinite side bands, but by correct shaping you 
can make them very small.)

-- 
David Woolley
Owner K2 06123.


On 01/04/2022 23:06, Jim Brown wrote:
> On 4/1/2022 2:35 PM, kevin wrote:
>> It is more accurately referenced as Discontinuous Wave.
> 
> Actually, it is 100% amplitude modulation of a carrier by a rectangular 
> wave train. That modulation excites non-linearity in the transmitter 
> signal chain and produce intermodulation distortion that is heard as 
> clicks.
>