Right you are, Ben.
Samuel is the Morse dude.
Realizing that there's no such thing as
"too much" information ... }:-)
To quote from
www.csc.gatech.edu/~copeland/4074/Winter98/bits_bauds.html
<quote>
** Baud **
"Baud" is the name for an information "symbol." Baud are
usually sent at a rate known as the "baud rate" (B). The
inverse of the "baud rate" is the time it takes to send one
baud, the "baud period" (T).
B = 1/T (Baud/second)
Baud is from the name Baudot. M. Baudot invented the
"Baudot code", a five-bit code used on early teletype
machines to send letters and numbers.
</quote>
** The above document also goes into a somewhat
** technical explaination of modulation concepts such
** as bits-per-baud. Dry, but informative.
A simplified explanation is available at
http://webopedia.internet.com/TERM/b/baud.html
and another, with historical notes can be found at
http://burks.bton.ac.uk/burks/foldoc/54/10.htm
(which includes the following line:
<quote>
The UK PSTN* will support a maximum rate of
600 baud but each baud may carry between
1 and 16 bits depending on the coding
(e.g. QAM*).
</quote>
*PSTN = Public Switched Telephone Network,
*Quadrature Amplitude Modulation).
But wait! There's more!
http://noframes.linuxjournal.com/lj-issues/issue14/1097s2.html
has a nice concise explanation of the difference
and the confusion.
And who is this guy, Baudot? Oh, you mean
French engineer Jean Maurice Emile Baudot?
To (further) quote from http://telecom.tbi.net/history1.html
<quote>
In 1875, a Frenchman named Emile Baudot developed a code
suitable for machine encoding and decoding. It consisted of
5 equal-length units (bits) and was suitable for transmitting
32 different code combinations (characters). Since it was
necessary to transmit the 26 Latin (A-Z), 10 numeric, plus
some control characters; two (out of the 32 combinations)
special characters, "FIGS" and "LTRS", were used to select
character sets (similar to the CAPS key on many computer
keyboards).
This code is commonly referred to as "Baudot Code" (naturally),
or ITA#2 (International Telegraph Alphabet, #2) today.
In Great Britain, this code is sometimes referred to as the
"Murray Code".
Unfortunately, Baudot Code was developed before the practical
deployment of associated applications and equipment.
As such, it did not enjoy widescale deployment until the
later invention of the teletypewriter.
</quote>
Any questions? :-)
~~ Garry
----- Original Message -----
"Ben A L Jemmett" <[EMAIL PROTECTED]> wrote:
> ... The official definition is signal level changes per second,
> and came into use as a way of measuring the speed of
> telegraph transmissions (the name Samuel Baudot springs
> to mind as the chappy it was named after, but I've probably got
> the Samuel confused with Morse).
>
To unsubscribe from SURVPC send a message to [EMAIL PROTECTED] with
unsubscribe SURVPC in the body of the message.
Also, trim this footer from any quoted replies.
More info can be found at;
http://www.softcon.com/archives/SURVPC.html
