On Tue, 22 Jul 2008 10:49:27 -0400, Jerry Flanders wrote: >Shifting a constant carrier back and forth does not require linearity >in later stages - for the same reason that CW does not.
Hmmm. Well, yes and no. Shifting a carrier in frequency results in switching transients (clicks). If these are amplified non-linearly, their relative level can increase. These clicks are easily heard in a K3 when close to a relatively strong RTTY signal, even one coming from another K3. The comment that FSK avoids the audio distortion produced by a sound card is quite correct. However -- sound card distortion can often be reduced significantly by operating the sound card about 6 dB down from its max output. 73, Jim K9YC _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
