Vic wrote: The extent of the sidebands (and therefore the rise/fall times and the maximum speed that can be transmitted) are limited by the width of the ssb filter. A signal generated this way can be quite clicky -- I would consider a 3 KHz wide CW signal way too wide.
------------- Yeah! On the CW bands at least. Some of the HSCW might need that! You bring up a good point I missed in my reply earlier. If using keyed audio to produce CW, then the waveform produced by the keying source is very important to avoid clicks. Kevin Stover said "...audio injected CW, really afsk,..." Isn't afsk really audio frequency-shift keying as commonly used for RTTY on VHF? The signal produced by a well-adjusted SSB rig with a pure keyed tone injected will be pure CW, undetectable from any other CW signal. The things to be concerned about to achieve that, other than a decent keying waveform on the audio signal, are adequate carrier and opposite sideband suppression. On the CW bands, any carrier or other sideband leak would be simply a "spurious" emission and would have to meet all the FCC requirements for the level of such emissions. Ron AC7AC _______________________________________________ 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
