The compression modulates the signal. That will have a fourier transform of its own. If we think of it as a simple amplitude modulation then, as for AM signals, the spectrum of the original signal will be combined (convolved) with upper and lower sidebands representing the spectrum of the compressor. Our ears don't notice (unless we're sound guys listening to a pop song thinking "They've squashed those dynamics to death" ;-) ) but maybe a digital mode will.
The transmitted signal is constrained to the IF passband so you stay within band. The compression frequencies and hopefully amplitude are both small so the artefacts it introduces into the spectrum should also be both narrow and small. - Richard On Fri, 12 Jul 2019 at 22:01, Wes <[email protected]> wrote: > What distortion? > > On 7/12/2019 1:15 PM, Jim Rhodes wrote: > > Nothing when it is done correctly on a mode that can stand the > distortion. I > > personally won't use it on digital modes as my rigs tend to turn it off > by > > default. > > > > Jim Rhodes > > K0XU > > > > On Fri, Jul 12, 2019, 15:10 Wes <[email protected] > > <mailto:[email protected]>> wrote: > > > > And what exactly is the problem with compression? It's used all > over the > > place. > > > > Wes N7WS > > > > On 6/28/2019 11:38 AM, Brian Denley wrote: > > > I have always thought that ALC is not appropriate for power > control. > > It’s a protection system. Over use of ALC acts like compression. > No? > > > > > > Brian > > > KB1VBF > > > Sent from my iPad > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] <mailto: > [email protected]> > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] <mailto:[email protected]> > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
