[RTTY] What causes RTTY with longish character spacing?

[Joe Subich, W4TV]

> I use Writelog/MMTTY.
> Why would you not use the limiting speed setting then?

Yes, you should be using "limiting speed" with MMTTY. 

> I have tried the Strict BPS setting and it was distinctly 
> slower. 

It is slower but not excessively slow considering that the 
alternative is a major problem (early PTT drop, buffer 
issues, etc.) for FSK users. 

> In a big contest like last weekend, it would mean many 
> contacts lost due to the longer time to get through each 
> contact.

"Longer time to get through each contact" is only a 
factor if you are running and never have to call CQ 
more than once.  If you don't have someone tail-ending 
every QSO, the time to complete a QSO is no longer a 
limiting factor as you have "slack" time. 

73, 

   ... Joe, W4TV 
  


> -----Original Message-----
> From: rtty-bounces at contesting.com 
> [mailto:rtty-bounces at contesting.com] On Behalf Of wa5zup
> Sent: Tuesday, September 29, 2009 7:43 PM
> To: 'RTTY Reflector'
> Subject: Re: [RTTY] What causes RTTY with longish character spacing?
> 
> 
> I use Writelog/MMTTY.
> Why would you not use the limiting speed setting then?
> I have tried the Strict BPS setting and it was distinctly 
> slower.  Real similar to what I have heard on the air. That 
> simply would not do.  In a big contest like last weekend, it 
> would mean many contacts lost due to the longer time to get 
> through each contact. John wa5zup
> 
> -----Original Message-----
> From: rtty-bounces at contesting.com 
> [mailto:rtty-bounces at contesting.com] On Behalf Of Joe Subich, W4TV
> Sent: Tuesday, September 29, 2009 5:27 PM
> To: 'Jim Reisert AD1C'; 'RTTY Reflector'
> Subject: Re: [RTTY] What causes RTTY with longish character spacing?
> 
> 
> 
> Jim, 
> 
> > Every now and then during a RTTY contest, I hear a station
> > that sounds like they are typing the characters as they go, 
> > such that the letters get printed more slowly than if they 
> > had been sent out automatically (in one "burst").  But the 
> > spacing between the letters is too regular for it to be just 
> > someone typing in real-time.
> 
> I believe those stations have (accidentally?) moved the 
> "Char wait" and/or "Diddle Wait" sliders in MMTTY from 
> the left most positions.  If I recall correctly, "Char 
> Wait" will add extra space between characters. 
> 
> The comments pointing to "Strict BPS" in microHAM Router 
> are off the mark.  "Strict BPS" will slow down the RTTY 
> marginally as the Eltima Driver used in Router treats all 
> data as 8-bit codes (start, 8 data bits, one stop bit) ... 
> this results in Baudot/ITA2 (a 5 bit code) which normally 
> consists of 7.5 bits (start, 5 data bits, 1.5 stop bits) 
> being sent with 10 bits (start, 5 data bits and 4 stop 
> bits).  "Strict BPS" is only needed with some software 
> (like Writelog's RTTYrite or MMTTY without the "Limiting 
> Speed" setting) that does not pace character output in 
> FSK. 
> 
> 73, 
> 
>    ... Joe, W4TV 
>   
> 
> 
> 
> > -----Original Message-----
> > From: rtty-bounces at contesting.com
> > [mailto:rtty-bounces at contesting.com] On Behalf Of Jim Reisert AD1C
> > Sent: Tuesday, September 29, 2009 3:27 PM
> > To: RTTY Reflector
> > Subject: [RTTY] What causes RTTY with longish character spacing?
> > 
> > 
> > Every now and then during a RTTY contest, I hear a station
> > that sounds like they are typing the characters as they go, 
> > such that the letters get printed more slowly than if they 
> > had been sent out automatically (in one "burst").  But the 
> > spacing between the letters is too regular for it to be just 
> > someone typing in real-time.
> > 
> > Assuming no one is still using old (pre-computer) hardware,
> > what accounts for this?
> > 
> > 73 - Jim AD1C
> > 
> > --
> > Jim Reisert AD1C, <jjreisert at alum.mit.edu>, 
> > http://www.ad1c.us _______________________________________________
> > RTTY mailing list
> > RTTY at contesting.com 
> http://lists.contesting.com/mailman/listinfo/rtty
> 
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