Interesting thread....I wonder if any "modern" rig actually does true FSK when you switch to that position? I know that my Kenwood TS-940S transmits AFSK in the FSK mode....it derives the mark/space
Sure they do. I can confirm that even though the FT-1000MP is not new anymore, it uses true-FSK. So did the even slightly more ancient Omni V and VI. The older Yaesus such as the FT-990 and FT-1000D
Chen, Fascinating explanation. Best technical treatment of this subject I've seen. The summary trade-off compromise (if I am understanding your comments properly) is something like this: 1. With a mo
I think that you may have misunderstood. I apologize that I write horribly; English is my third language, even though I should not be using it as an excuse considering the fact that I have been in th
Chen, I met my Chinese wife when I lived in China and wanted to learn Chinese. So from 3rd language standpoint, I consider your English to be really excellent. And I also 100% understand your meaning
NO! Keep going! Whenever we can get Chen going, we all get educated! :-) -- Peter Laws | N5UWY | plaws plaws net | Travel by Train! _______________________________________________ RTTY mailing list R
Jeff, I don't believe you can consider the IF filter ("roofing filter") to be the only source of selectivity in any modern RTTY environment. Even the old "loading coil" TUs included some degree of ad
Joe, Thanks for catching my error. The wider bandwidth improves the SNR to an extent. I would think this is an asymptotic curve to a point... You make good points about the practical nature of this d
I'm not so sure that's a major concern. Maybe I am atypical, but on average I tend to use narrower IF filtering in RTTY than I do in CW. I have a K3 with the "250 Hz" (actually 370 Hz) roofing filter
My experience is very similar to Rich's. No argument about the optimum bandwidth under QRM-free conditions being 350-400Hz; but in intense QRM the word "optimum" takes on a whole different meaning. D
This is why the bandwidth of available filters seems to settle into the 350 Hz (Icom FL232) to 400 Hz (INRAD) range. While some might prefer a slightly wider bandwidth for normal CW, the 350 to 400