[RTTY] RTTY and Skimmer was: Re: Decoder performance on crowded bands

[Pete Smith N4ZR]

Hi Don et al - wish I could take credit for that post, but it wasn't 
me.  I can barely spell RTTY.

This much I'm pretty sure of - neither CW nor RTTY Skimmer does any 
post-processing. Once the callsign and whether the station is CQing has 
been determined in a given decoder stream, that information is 
immediately passed to the Telnet server.  Ever since the first days of 
CW Skimmer I have wished for a function that would, in effect, "notice" 
that a station that was spotted as CQing was, in fact, S&P.  The obvious 
way to do this would be to "take note" that a station just posted as 
CQing turned up within some time interval on a different frequency, 
therefore indicating that he wasn't CQing at all, or at least no longer 
on the same frequency. Logging software could then go back and delete 
the original spot from the Bandmap or other listing of eligible stations 
waiting to be called.

Another approach would be to wait until the station worked a second 
station on the same frequency, and not identify it as CQing until that 
criterion has been met, but I suspect the delay would be unacceptable to 
many of us.

I sort of suspect that a good solution will tend to have several 
components, and that different ops will take different routes.  This 
much I know for sure, RTTY on the RBN is here to stay.

73, Pete N4ZR
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On 9/30/2015 9:47 AM, Don AA5AU wrote:
> According to Pete's (N4ZR) post today, "{enter}WW3S WW3S" is suppose to break the association from the CQ but it doesn't appear to be true in some cases. Putting a C/R L/F {enter} in front of nearly all macros has been preached for years and I believe most operators do this already.
> I include a C/R L/F at the start of my macros and I still get spotted quite a bit when S&P. Pete's post did make the suggestion of adding {enter} after the trailing CQ in the message and although it will make the CQ message longer, it might help keep S&P stations from being spotting so I think I will try it in JARTS (if I can remember to do so). If there is a C/R after the CQ and the S&P station sends C/R at the start of his message, perhaps the double C/R will help. I don't know.
> Now all this got me to thinking, and I don't know the answer to this, but perhaps if S&P stations wait a little longer before coming back to a CQ station, will it help eliminate the S&P station from being spotted? This is actually good practice anyway. I like to wait just a half second or more after the run stations drops his transmitter to listen to see if anyone (that I can hear) else is calling the CQ station at the same time as me. If so, I send my call 3 times. If not, I send my call 2 times. I wonder if this will also help break the association with the CQ message?
> I don't now how much better the skimmer software can be made. But if the operators on this reflector would start implementing changes to our own messages and the way we operate, maybe we can make the skimmer experience a little better.
> 73, Don AA5AU
>   
>
>
>        From: Lee Sawkins <ve7cc at shaw.ca>
>   To: rtty at contesting.com
>   Sent: Tuesday, September 29, 2015 7:58 PM
>   Subject: Re: [RTTY] Decoder performance on crowded bands
>     
> Jamie
>
> How sending this. "{enter}WW3S WW3S ". Maybe this would break the association between the CQ from AA5AU and you better and not spot you. I seem to rarely get spotted during S&P and this is what I do.
>
> 73 Lee
>
> ----- Original Message -----
>
> From: "Gary Senesac" <al9a at mtaonline.net>
> To: rtty at contesting.com
> Sent: Wednesday, September 30, 2015 12:18:03 AM
> Subject: Re: [RTTY] Decoder performance on crowded bands
>
> Quick fix. Don't send the 'DE' before your call. It is absolutely unnecessary!
>
> Gary AL9A
> Sent from my Kindle HDX
>
> On September 29, 2015, at 2:57 PM, WW3S <ww3s at zoominternet.net> wrote:
>
> What I think usually happens is the skimmer cannot tell the difference between who is who.....so since most people now append their CQ message with CQ, it goes like this....
> CQ AA5AU AA5AU CQ
> and then I answer
> DE WW3S WW3S
> ends up looking to the skimmers as
> CQ AA5AU AA5AU CQ DE WW3S WW3S
> and I get spotted on Dons run frequency....
> just a semi educated guess, from a semi educated man....
>
>> On 9/29/2015 7:37:46 PM, Tim Shoppa (tshoppa at gmail.com) wrote:
>>> Wow, thanks for all the responses! Most especially to Lee VE7CC himself,
>> who helped me figure out how to reset a filter I had apparently applied
>> over a year ago (probably by clicking on the "NE ONLY" button in N1MM). The
>> density of good CW skimmers in NE USA meant that I had never noticed this
>> filter until the RTTY contest, where most of the USA RTTY Skimmers were in
>> 7-land.
>>
>> AA5AU and GU0SUP raised an issue, about how sometimes S
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