On 11 Jun 2013 at 11:31, [email protected] wrote: > Message: 20 > Subject: Re: [Elecraft] KX3 Data A and AFSK-A Mode need help > > Use DATA-A mode. >
Snipped > > In general, USB mode should not be used for digital modes at all (of > course it can be made to work, with some caveats like those you > already mentioned, but it's generally best to steer clear of it). > > 73, Matt VK2RQ Sorry, I beg to differ. USB is the default standard on all bands/frequencies for PC/souncard based digimodes. It's just heck of a lot easier to let the software handle any needed inversion for RTTY or whatever. Plus, if your software doesn't do the needed math to show the "RF signal frequency" on a waterfall, just the audio frequency, then it's a lot easier for the wetware behind the eyes to handle too. The common use of LSB for voiced/phone below 10MHz was an artifiact caused by some would say "sloppy design" in early commercialy made Ham SSB rigs, that used crystal filters and simple mixing (a legacy from AM designs) It was just cheaper for them to engineer them that way. There is no reason on earth these days why you *NEED* to use LSB for PC/Soundcard based digimodes. (Or any other mode, it's just what everyone got used to with voice mode. Few if any commercial services use LSB at all.) 73 & Flame suit on! :) Dave G0WBX. ______________________________________________________________ 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
