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.
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