[RTTY] Contester preference - 1- versus 2-decimal-place spots

[Tom Osborne]

I don't use RTTY Skimmer, but when I'm running, I would rather everyone is
not exactly on the same frequency when calling me.  I just use the RIT and
{clearrrit} functions.  For me it's aggravating to call CQ and have 2 or 3
stations all exactly zero beat.

I can just imagine with a big station with many callers, having all on the
exact same frequency would be a pain.  Guess that is why DX'peditions like
split and to have them spread out.

Course, with my peanut whistle station, that doesn't happen all that
frequently :-)  73
Tom W7WHY



On Thu, Oct 15, 2015 at 9:46 AM, Tim Shoppa <tshoppa at gmail.com> wrote:

> Pete, I have thought about your question from the running standpoint, and I
> think I saw fewer off-frequency callers while I was running in CQ WW RTTY
> than I have had in the past.
>
> It is likely that the credit goes to more precise and accurate RTTY skimmer
> spots (what you call "2 decimal place spots").
>
> But beyond just more significant digit, there were substantially smaller
> systematic and random offsets in skimmer frequencies, than in past major
> RTTY contests. Maybe this is as simple as GPS-locked skimmers, but I think
> it's beyond that, that the skimmer author has worked with folks who run the
> skimmers to systematically calibrate all the results.
>
> One thing I did notice, was that for callers that were only slightly off
> frequency (say 20-50Hz), 2Tone AFC always did the "right thing". I believe
> I also observed that GRITTY in "jackrabbit mode" seemed to be able to
> back-decode (into the past) to some extent and that helped with callers who
> were off frequency by up to a few hundred Hz.
>
> Tim N3QE
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