[RTTY] Zone sent as letters?

[WS7I]

What I really don't understand is why you don't just make this easy.  5993 WA de ws7i

And don't tell me its 03 its just Three!

--
ws7i at ewarg.org



---------- Original Message ----------------------------------
From: Kok Chen <chen at mac.com>
Date:  Sun, 27 Sep 2009 00:19:27 -0700

>> Someone must have turned it off at the original poster's station.
>
>That is an incorrect analysis of the original poster's (AD1C) problem.
>
>The "599 PR AL" is due the fact that the receiver was using USOS while  
>the transmitter was not.  I.e., Jim *was* using USOS on his MMTTY  
>setup.  He never turned it off.  It is the transmitter that was not  
>using USOS.
>
>Moreover, using spaces in between numbers, when USOS is turned on, is  
>a very bad idea.  When USOS is engaged, the space forces the  
>transmitter to send an extra character (FIGS shift) in between the  
>numbers.  For short contest exchanges, this extra character increases  
>the probability of errors at the receiving end by a significant  
>amount, not to mention slowing down the exchange. (Both are the same  
>reasons that you do not use upper case characters in a PSK31 contest.)
>
>Since the "-" character in the Baudot code is in FIGS part of the  
>table, the encoder will breeze right through the "599-3" part of the  
>exchange without sending any unneeded shift characters, whether or not  
>USOS is turned on at the transmitter.
>
>Indeed, 599-3 is encoded into exactly the same Baudot sequence whether  
>the transmitter is using USOS or not, and it is received as 599-3  
>whether the receiver is using USOS or not.  It is the most perfectly  
>cross compatible way to send RST and a zone number.
>
>I repeat, "599-3" sent with or without USOS is received as "599-3"  
>whether or not the receiver is using USOS.
>
>If dashes are harder to read than spaces on the screen, just map a  
>dash into a space in the software.
>
>73
>Chen, W7AY
>
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