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

______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]