[GreenKeys] Dot cycles per second

[John Vendely]

Hey Nick,

This is probably a question for Jim Haynes, but I think yer correct.  
Teletype's Bulletin 230B, for Test Set, Teletypewriter, TS-799/UGM-1, 
contains the following paragraph describing one of its operating modes:

"Alternate marking and spacing pulses (current-no current) referred to 
as "dot-cycles" are also available.  These pulses have widths identical 
to pulse widths for standard as well as higher speeds of operation but 
they are not identifiable as any particular character...The dot cycle 
output is intended for testing of transmission or connecting facilities 
between teleprinters."

In other words, a dot-cycle generator is simply a square wave generator 
whose frequency, in cycles per second, equals the bit rate corresponding 
to a given machine WPM rate, e.g., 37 cps for 75 baud.  A dot-cycle rate 
of 100 cps would correspond to 270 WPM, etc.  I would guess that the 
term "dot-cycle" is a holdover from the morse telegraphy era..

https://ia601502.us.archive.org/13/items/nrf_230b/230b_text.pdf

73,

John K9WT


On 11/8/2025 4:58 PM, Nick England via GreenKeys wrote:
> I am reading the CV-116 manual which says select LOW for keying speeds 
> up to 38 dot cycles per second.
> I *think* this is equivalent to 76 baud because a “dot cycle” consists 
> of a mark plus a space element. Is this correct?
>
> Note. The one thing AI apps are good at is giving an answer that 
> sounds good, whether actually correct or not.
>
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>
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