John,
You wrote :-
"Aren't RTTY, SITOR etc. "Radiotelegraphy" modes?
Morse coded, ON-OFF keyed, carrier is one, but not the only,
"radiotelegraphy" mode."
Exactly - The following is a description from the Encyclopedia Britannica :-
Radiotelegraphy - communications
Radio communication by means of Morse Code or other coded signals. The radio
carrier is modulated by changing its amplitude, frequency, or phase in
accordance with the Morse dot-dash system or some other code. At the
receiver the coded modulation is recovered by an appropriate demodulator and
the code groups are converted into the corresponding symbols. In many
instances the symbols are generated by a computer and modem rather than with
a manual telegraph key.
Gary - G4WGT.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of John P-G
Sent: 22 December 2008 18:55
To: [email protected]
Subject: Re: LF: 500 Khz modes
On Mon, 22 Dec 2008 13:55:12 -0000
"mal hamilton" <[email protected]> wrote:
> All MF
> To put it briefly WRC07/Radio regulations 5.82A the spectrum between
> 495 khz and 505 khz permits RADIOTELEGRAPHY only. I pointed this out
> in a previous message. de Mal/G3KEV
Aren't RTTY, SITOR etc. "Radiotelegraphy" modes?
Morse coded, ON-OFF keyed, carrier is one, but not the only,
"radiotelegraphy" mode.
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