[GreenKeys] Dot cycles per second

[Duncan Brown]

Nick,

I've never seen the term "dot cycles per second" in military TTY manuals 
before.  In the introduction of TM 11-2241, it says that the CV-116 will 
operate at "speeds as high as 100 dot cycles per second."

Your definition of "dot cycles" seems logical, but that implies that the 
CV-116 could do 200 baud. In 1955, 75 baud equipment was just becoming 
available. I don't think there was anything else faster.  TM 11-2241 
uses the M15 (TG-7-B) as the example equipment.

Maybe the CV-116 really could do 200 baud, but the [LOW] switch position 
was to optimize it for the present day (1955) equipment speeds (45-75 
baud).  TM 11-2241, p 15, para 20h of "Preliminary Starting Procedure", 
says to "Set SPEED switch at the LOW position"  without regard to TTY 
equipment being used.

73,

Duncan
K2OEQ

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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