In an SDR radio such as the K3, the SSB signal is "perfect", in that there is no suppressed carrier leakage because there never was a carrier in the first place. Properly adjusted, the audio distortion in the SSB signal is negligible. As a result, there is essentially NO difference between AFSK and FSK in terms of transmitted signal. No one listening to your signal can tell that you are AFSK or FSK and "good enough" is meaningless.
There are some possible local advantages to AFSK if your hearing resembles mine. I use a pair of stereo cables from Radio Shack [$3.99 each if I remember right] between the line in/out on the K3 and line out/in on my laptop, K3 in AFSK mode. I run N1MM in contests with MMTTY, but other loggers interface to the MMTTY engine fine. I can't hear anything at all around 2 KHz even though my digital hearing aids are running at afterburner-roar at those frequencies. The K3 lets me choose from four pitch frequencies, I use the lowest at 915 Hz, and just have to make sure that's where MMTTY is set. People who can hear 2 KHz tell me that it's really tiring and they prefer lower tones as well. With the P3, I've found I *almost* don't have to listen to any tones. :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 2012 Cal QSO Party 6-7 Oct 2012 - www.cqp.org On 4/18/2012 12:03 PM, Dave wrote: >I am using AFSK, but plan to > switch to FSK if I decide to do very much RTTY. Many friends tell me > FSK is best, a few say AFSK is "good enough". ______________________________________________________________ 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
