From: utzoo!decvax!harpo!floyd!vax135!ariel!orion!lime!we13!rjr
Newsgroups: net.ham-radio
Title: CW BANDWIDTH
Article-I.D.: we13.266
Posted: Mon Nov 29 08:58:24 1982
Received: Tue Nov 30 02:38:08 1982


The bandwidth of a cw signal is determined by the formula:

		Bw = BK

where Bw is the bandwidth in Hz, B is the baud rate, and K is a
fudge factor given as 5 for fading circuits. Thus, the common
bandwidth of 100 Hz for a cw signal is actually at 20 baud.

Anyway, on-off keying is a form of modulation (actually 100% AM)
so the keying speed is equivalent to the modulating frequency.
Like any AM signal, then, the higher the modulating frequency,
the wider the actual bandwidth. Thus, a 600 baud cw signal would
require about 3 kHz bandwidth ( same as a SSB signal).

			Bob K9EUI