[RTTY] What Does MMTTY really send?

[David G3YYD]

That is crazy. 2Tone sends:

LTR>W<FIG>1<LTR>ABC<SP><FIG>599<SP><FIG>05<SP><FIG>05

It will also send the appropriate case shift at the start of a new line for the first printable character. 2Tone has 3 shift states: letter, figures and undetermined. When in undetermined state it will send the correct shift state that applies to the next printable character.

73 David G3YYD
-----Original Message-----
From: RTTY [mailto:rtty-bounces at contesting.com] On Behalf Of Joe Subich, W4TV
Sent: 21 December 2017 20:22
To: rtty at contesting.com
Subject: Re: [RTTY] What Does MMTTY really send?


 > So, how does MMTTY encode this with the TX-USOS button clicked?
 > "W1ABC 599 05 05 NY NY"
 > I'm wondering if someone knows off hand so I don't have to instrument  > it.
 > Reading the help file literally, it would be this:
> <LTR>W<FIG>1<LTR>ABC<SP><LTR><FIG>599<SP><LTR><FIG>05<SP><LTR><FIG>05
> <SP><LTR>NY<SP><LTR>NY > ...where <SP> = space and the LTRS and FIGS are the shift characters.

That is my understanding of USOS operation.  It is also the reason for the old argument about using "-" instead of <space> in a string like
599 05 05 NY NY (e.g. 599-05-05 NY NY) in order to save the "extra"
<LTRS><FIGS> preceding each instance of "05"

73,

    ... Joe, W4TV


On 12/21/2017 2:55 PM, aflowers at frontiernet.net wrote:
>    I'm running some simulations with various contest exchanges against BER, along with the various USOS combinations that are possible.  I was reading the MMTTY manual and it says this about the TX tab:
> "USOS-- turns on USOS on transmit. When you transmit a space, MMTTY also sends a LTR shift character."
> So, how does MMTTY encode this with the TX-USOS button clicked?
> "W1ABC 599 05 05 NY NY"
> I'm wondering if someone knows off hand so I don't have to instrument it.  Reading the help file literally, it would be this:
> <LTR>W<FIG>1<LTR>ABC<SP><LTR><FIG>599<SP><LTR><FIG>05<SP><LTR><FIG>05<
> SP><LTR>NY<SP><LTR>NY ...where <SP> = space and the LTRS and FIGS are 
> the shift characters.  The LTR/FIG sequence seems kinda crazy, but I'd like to know for sure so I can simulate what really out there in the wild.
> Thanks,
> Andy K0SM/2
> 
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