[RTTY] More GRITTY observations
psussman at pactor.com
Mon Apr 27 15:02:43 EDT 2015
After reading the information referenced, I wonder if the assumption can
be made that the "USOS sender assumes that the receiver has shifted to
LTRS shift after the sender transmits a space character."
Perhaps I'm confused. Wouldn't that depend upon how either station
handled USOS receive? Have we not, merely reduced the 16 possibilities to 8?
And .. if I Tx and Rx with USOS active, aren't there still 4 combinations?
My question envisioned how to set up my station in the most favorable way in
light of the 4 possibilities potentially used by any other station. Yes, it
is redundant if both stations run USOS. However, what is the best set-up for
me, if I don't know what the other station is doing?
73 de Phil - N8PS
Quoting Kok Chen <chen at mac.com>:
> I had described USOS in the "Unstructured Digital Modes" section of
> Chapter 16 of the ARRL Handbook , viz. a space character is
> considered to be an implicit LTRS shift by both USOS sender and USOS
> receiver. This is why David G3YYD had mentioned that a LTRS shift
> after a space character is redundant. It is only redundant when
> both sender and receiver use USOS,
> Please use that information (i.e., USOS sender assumes that the
> receiver has shifted to LTRS shift after the sender transmits a
> space character) to generate your own scenarios.
> Chen, W7AY
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