Just remember the old Lucky Strike commercial
L-S-M-F-T
Lower Space Means Fine Teleprinting
de Phil - N8PS
----
Quoting Kok Chen <chen@mac.com>:
>
> On Mar 13, 2008, at 3/13 9:25 AM, Gedking@aol.com wrote:
>
> > TX5C running USB es reverse??? I got em on 14084 LSB no reverse. I
> > thought
> > RTTY LSB common practice.??
>
> You can use either USB or LSB as long as you arrange to transmit so
> that the Mark carrier is the higher of the two RF carriers of an RTTY
> tone pair, and properly receive and decode an RTTY signal that was
> sent with the Mark tone being the higher of the two RF carriers.
>
> If you use LSB receive, the Mark carrier becomes the lower tone of
> the tone pair at the AF output of the receiver. Many surplus modems
> from the old days used the 2125/2295 tone pair with Mark assumed to
> be the 2125 Hz (lower audio) tone. That is why it was more
> convenient for someone back then to operate RTTY using LSB.
>
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