[CW] PARIS vs CODEX (or CODEZ) Code Speeds

[D.J.J. Ring, Jr.]

Wim,

Yes, the same baud rate, the same dot and dash and spaces.  It's "faster"
only because Morse was designed to send English not code groups.

The commercial Telegraph license test were sent at the same dot rate.

50 baud = PARIS and if you can send PARIS 20 times a minute your sending 20
wpm or 1000 baud a minute.

However code groups are 60 baud, so groups per minute is 50 divided by 60
times words per minute speed. So 20 wpm is aprox 16 gpm.

73

DR

On Feb 6, 2018 6:11 PM, "pa0wv" <pa0wv at amsat.org> wrote:
>
> D.J.J. Ring, Jr. schreef op 2018-02-05 03:30:
>>
>> PARIS was chosen because the ITU conference was held in (wait for it),
>> PARIS.  PARIS was defined as a word having 50 "dot units" or baud.  So
>> it became the  speed standard.  10 WPM was the speed that resulted
>> when  PARIS was sent 10 times in a minute.  It was the average length
>> of a word in English.
>>
>> Code  groups are random so their speed is different than English,
>> which is "faster" because Morse was designed for English, the common
>> letters are short Morse characters, E the most common, T the second
>> most common, etc.
>>
>> CODEZ or CODEX (same baud) is 60 dot units or 60 baud. So you can see
>> that the same dots and dashes (speed setting of the key) will send 20
>> wpm but only 50/60 groups per minute or about 16 gpm.  Thus the test
>> for the Telegraph license is 20 wpm and 16 gpm (groups per minute).
>
>
> Do you mean that the telegrapph examinations ( first class 25 wpm (plain
text) and 20 wpm code groups)
> had the same baud rate ?
>
> 73 Wim 30
> --
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