[GreenKeys] ITTY/WLO

Keelan Lightfoot keelan at mail.grenander.com
Sat Sep 3 02:33:47 EDT 2011


George,

I'm sorry to hear that y'all couldn't work something out. If you could come up with a more stable way to deliver the ITTY feed, do you think they would re-consider?

Also, with the format switching between SITOR-B and RTTY for every story, doesn't that mean that those of us with "dinosaurs" would get a paragraph of garbage between each RTTY story?

- Keelan

VE7NCR

On 2011-08-31, at 8:04 PM, George B. Hutchison wrote:

> GreenKeyers - - -
> 
> Today Qwest/CenturyLink was upgrading internet service in this 
> direction of the world by installing fiber optics to replace 
> previous methods.
> 
> ITTY is back on the air, as is WLO.
> 
> WLO has changed format to include SITOR-B, (Forward Error 
> Correction) transmissions.
> 
> It appears that The story is first run in SITOR-B, and then mode 
> switches to RTTY after the SITOR-B transmission is concluded.
> 
> An announcement at the conclusion of a SITOR-B run states that the 
> mode is shifting to RTTY, and at the end of an RTTY segment it 
> announces switching to SITOR-B.
> 
> Shift in RTTY is right-side up, meaning mark frequency s higher in 
> frequency than space.
> 
> SITOR-B decoding must be reversed. Speed of RTTY is 45.45 baud. 
> Speed in SITOR is 50 baud.
> 
> Using decoding program SeaTTY for a comparison indicates that 
> SITOR-B indeed produces more readable copy.
> 
> The ITTY system will no longer be supplying RTTY signals for WLO. 
> The technical specialists at WLO have a specification for 
> reliability that ITTY cannot compete with.
> 
> Windows and the internet being what they are cannot meet the 
> demands. Critical Updates are such that most often they require a 
> shutdown and reboot. A recent update of Windows Media Player had the 
> WLO crew scratching their heads as to how to bring Media Player back 
> on line.
> 
> On behalf of the ITTY staff I would liike to thank Rene, Alan the 
> Programmer, Nick Tusa and loveable Jack Hart for the opportunity to 
> participate in this adventure. We proved that it could be done over 
> the internet and that the interest in RTTY News Transmissions is 
> there. It just does not meet the standards required to meet a very 
> demanding application.
> 
> W7TTY
> 
> 
> 
> 
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html



More information about the GreenKeys mailing list