Brian, Do not be put off by those who believe that "radio quality" audio cannot be generated by a soundcard. That may have been true with cheap soundcards a long time ago, but most soundcards available now will produce pure audio tones with very little distortion - so unless you have a totally antique computer soundcard, it will do AFSK RTTY or PSK just fine. Many are doing it, and I dare say that the problems are not with the soundcard itself, but with some hams overdriving the audio input of the transceiver.
You have already heard that your proposed solution will not work - but there is a 'close relative' that will generate RTTY, PSK or CW from keyboard input and send it to the K3. Look at the K3Utility Terminal tab. Reception is on the screen and you would receive in PSK D or FSK D data modes. It is not exotic, but it works FB as a quick solution - tune the desired signal with a narrow filter. Other computer software packages will do all that the K3Utility Terminal will do and a lot more too, but they do use the soundcard for both transmit and receive. DigiPan is one of the easiest, Ham Radio Deluxe with DM780 is one of my favorites and is free - others prefer the full featured MixW. 73, Don W3FPR Brian Machesney wrote: > Don, > > I am a "digital mode neophyte." Is it possible - or, is it considered to be > too much of a kludge - to receive a digital mode (be it PSK or RTTY) via PC > soundcard and send CW to the K3 for translation into the digital mode? It > seems that this would avoid some of the pitfalls associated with using a PC > to generate "radio quality" audio. Do you know if any of the popular > programs does this? > > Thanks, > > Brian K1LI > > On Mon, Mar 23, 2009 at 3:25 PM, Don Wilhelm <w3...@embarqmail.com> wrote: > > >> Dick, >> >> Rather than using SSB mode for data, use the DATA modes, it is less >> troublesome and compression is set to zero automatically.. >> Use DATA A mode for soundcard digital modes, or AFSK A for soundcard >> RTTY. See page 31 of the K3 manual. With good carrier balance, an AFSK >> signal is equal to an FSK signal. The K3 AFSK A data mode sets the mark >> frequency in the VFO (rather than the carrier frequency), and allows use >> of the dual passband filter which is designed for RTTY use. >> The narrow roofing filters and the full range of DSP filters can be used >> for DATA modes if you configure the narrow filters for receive in that >> mode. Transmit must always use the 2.7 or 2.8 kHz filters, but the K3 >> figures out the arithmetic involved. >> >> If you wish to use the FSK input to the K3, you will have to provide a >> level translation and drive the FSK input on the ACC connector. MMTTY >> has methods of activating the FSK input. >> >> 73, >> Don W3FPR >> >> Richard W. Solomon wrote: >> >>> Does anyone have any idea when they will upgrade to Keyboard operation >>> for RTTY ? Now, I mean using real FSK, not this sound card AFSK stuff. >>> >>> In some radios, AFSK requires you to use the SSB mode, which does not >>> allow filter selection. The Yaesu does. >>> >>> 73, Dick, W1KSZ >>> >>> >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.238 / Virus Database: 270.11.24/2018 - Release Date: 03/23/09 > 06:52:00 > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
