I seem to remember "R-Y" as two letters I could type, and it would make
the
Teletype Machine go from one extreme function to the opposite extreme
function, in the printer and machine and the code functions.
We used to use that as a way to check out if a machine was functioning
properly, as that would put it through all it's steps.
With age, I am wondering if I am right or wrong on it being R-Y.
Was it R-(?) ??
Best to all----
Ron


You are correct in the RY. Those two letters are the reverse of each other
and should move the mechanical selectors from one extreme to the other . It
is possible to have the receiver set to the wrong sideband or the
demodulator reverse switch set to the wrong position and you will receive YR
instead of RY. This makes for interesting problems for the new to rtty
person. If a transmission starts off with a line or two of RYs and you are
receiving YRs, when the main body starts up you will receive jumbled
characters.