On May 14, 2006, at 10:38 PM, Dale Putnam wrote:
This brings to the forefront, the question of what is the bandwidth
of a cw signal, that is keyed at 35 wpm, and one that is keyed at
99 wpm??
Good question.
While the signaling rate of a CW signal does have an affect on
bandwidth, the majority of the wideband products come from the rapid
rise and fall times of the signal envelope. (that's why key clicks
are heard so far away from the operating frequency) Don't expect a 99
wpm signal to be much wider than 35 wpm.
That said, no one can copy a 99 wpm CW signal. The top QRQ guys are
around 60 wpm.
With the regulation by bandwidth, does this now put a speed limit
on cw?
Potentially, but that limit is so high as to be practically no limit.
Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
