When you supply a rtty keying signal to the Yaesu, you are essentially toggling between ground and open, which in a Yaesu toggles two audio tones. This is similar to supplying afsk tones to the mic c
Well, even though I didn't originate the original post, let me try and explain... Your TNC (or whatever type of rtty modem you use), can output TWO types of transmit signal towards the radio: a DC vo
The FT100MP MkV Technical Overview says: "Thanks to very fast acting DDS circuits, a true frequency shifted keying carrier generator is provided for the MARK_V for RTTY use" But then it goes on to mu
Chen the same goes for the FT1000/FT1000D. Just take the MIC control and turn it down on the Yaesu rigs and see if you get out even if using the FSK inputs on rear of rig. I first noticed this while
Bill, That is EXACTLY the point and why the purists prefer "true" FSK. True FSK will not give you the "unwanted sidebands" and bogus signals all up and down the band you refer to above. If you do hea
Yep. I have been an FSK fan since the early '80's. Back then you could usually tell, because a "newbie" using AFSK didn't know how to adjust his gain (or ignored the instructions) and splattered all
Or when you hear lots of windows sounds: "Ding", "Tadaaa", "Houston, we have a problem...", Gamesounds... In the summer I was often stby on 28.680 waiting for SSTV signals. Amazing what you hear on
So what - I use my PTC-2 for all modes, RTTY, PSK31, SSTV, Pactor I and II. The cable (just one) goes to the ACC1 connector in the rear, connects both FSK and AFSK inputs. What is used depends only
Ekki, you're hitting your DELETE key too fast! This was explained lots and lots yesterday! ;-) FSK - Digital signal shifts main oscillator of rig. AFSK - Usually external tones generated e.g. by an
This is NOT true for the FT1000MP! The MIC gain has no influence on the signal when using the RTTY button and FSK input through the RTTY connector. 73 de Goetz k0869565@tiscalinet.de
The difference comes in at the radio, where the signals dscribed above can be processed by your radio in THREE different manners (although most radios do not have all three modes). -- Actually, there
Author: Helen Turner" <hmst99@dslextreme.com (Helen Turner)
Date: Thu, 21 Mar 2002 18:07:07 -0800
-- Original Message -- Only trouble is that you NEED AFSK for PSK31 -- Frequency shift keying (audio or otherwise) is not used for PSK31. The mode uses phase shift only. There are getting to be TMA.
Yaesu signal Hi Goetz - Apparently I'll eat my hat on this one, but - It -does- still use an internal AFSK generator when using "FSK" (the RTTY input connector). I traded my MARK-V toward a PROII an
Bill, why was this done? I suppose it was more copyable than voice under certain conditions? Reminds one of using a code practice oscillator on a 2M repeater...
It is the same as connecting an AFSK generator to a sideband rig. Except that with AM, you not only send the LSB, but you also send the USB and the carrier. (Which is not *that* different from some o
Author: Bill Turner" <w7ti@dslextreme.com (Bill Turner)
Date: Thu, 21 Mar 2002 21:55:39 -0800
I wasn't there at the very beginning of carrier-type AFSK, but I suspect it was because it was the simplest, quickest and easiest way. Back then, with tube-type VFOs, stability was always an issue an
"Frequency shift keying (audio or otherwise) is not used for PSK31. The mode uses phase shift only." As does Pactor-II. Duane Budd w5ben@arrl.net Johnson City, TN **All outgoing Email is screened by