[RTTY] FSK is bad?

[Thom]

I hope that once I get my new interface for true FSK and get it set up 
someone from the list will look at my signal and tell me how wide it 
actually is.  That way I will know how close I can get to someone else 
when the band is crowded.

Thanks

73

Thom KI8W


On 10/24/2016 21:09, Jeff AC0C wrote:
> I think this list of Al's is right but the conclusion is pessimistic 
> and not in the traditional ham spirit.
>
> There are so many good signals on the bands now days that when you run 
> across a guy who's several KC wide, it sticks out.  And in the few 
> cases I have queried, there is almost always an older Icom in use.  So 
> when guys ask me about RTTY and Icom, I just tell them it's something 
> to check out. Nothing against Icom - they asked so I noted the concern.
>
> The general argument has always been that AFSK setup is too hard to 
> do, prone to cockpit error and users can't be trusted to get it 
> right.  I think that personally is nonsense.  There is an entire PSK 
> and JT69 band segment of younger users who have managed to pilot those 
> systems to success without a crutch like FSK.  Maybe it's true, maybe 
> not, but I bet you would agree that it's hard to find a young RTTY op; 
> and it's hard to find an old PSK op. But like the Icom old rig wide 
> FSK signal issue, I only have a few data points so my claim may be in 
> fact nonsense.
>
> What I do know with certainty is that having a clean signal allows 
> more guys to use the same bandwidth.  That running AFSK with modern 
> tools like 2Tone or MMTTY gives you an exceptional signal regardless 
> of the rig.  And that some guys running "true" FSK in fact have the 
> worst and fattest signals on the band.  For those reasons I believe 
> it's worth the small incremental effort to get AFSK going over the 
> plug and play FSK.
>
> 73/jeff/ac0c
> www.ac0c.com
> alpha-charlie-zero-charlie
>
> -----Original Message----- From: Al Kozakiewicz
> Sent: Monday, October 24, 2016 3:30 PM
> To: Lee Roberts ; RTTY at contesting.com ; Don AA5AU
> Subject: Re: [RTTY] FSK is bad?
>
> I think the way I would characterize it is as follows:
>
> #1 FSK is limited by the implementations present in commercially 
> available radios
>
> #2 AFSK is limited by the ability, diligence and patience of the hams 
> using it
>
> In the long run and with a real world population, #1 usually is the 
> lesser of the two evils.
>
> Al
> AB2ZY
> ________________________________________
> From: RTTY <rtty-bounces at contesting.com> on behalf of Don AA5AU 
> <aa5au at bellsouth.net>
> Sent: Monday, October 24, 2016 4:25 PM
> To: Lee Roberts; RTTY at contesting.com
> Subject: Re: [RTTY] FSK is bad?
>
> It's all relative Lee. FSK is not bad, it's just the way some radios 
> transmit FSK causes the signal to be wide. If we all had Elecraft 
> K3's, we could reshape the FSK signal bandwidth and all would be 
> dandy. But we don't all have K3's and many of us (including myself) 
> can't afford one anyway so we are stuck with what we have.
> If you do own a K3 and narrow your FSK signal, you are at a 
> disadvantage during a contest because other stations can get closer to 
> you and cause you to have to move. If you have a wider FSK signal, 
> stations will not be able to get as close to you without having 
> receive problems of their own. Thus your signal will be found and 
> copied by more people. This is an advantage for wideband FSK users.
> Jitter? Not sure I ever lost a contact because of jitter but I suppose 
> it's possible.
> Don AA5AU
>
>
>
>
>
>      From: Lee Roberts <ham at n0sq.us>
> To: RTTY at contesting.com
> Sent: Monday, October 24, 2016 2:27 PM
> Subject: [RTTY] FSK is bad?
>
> When I first started in RTTY, FSK was the thing to do. Now, a lot of
> people are saying that it has multiple issues and are now telling me
> that AFSK is the way to go. But, I've heard that pFSK has no jitter
> issues when using tinyFSK and an Arduino board. Since I've heard that
> FSK has jitter issues under Windows, I wonder if jitter is a problem
> using FSK in Linux. But, as far as I know, there aren't any Linux
> contesting programs that use FSK - fldigi has the option for pFSK though.
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