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Re: Cw help

 

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CW is an amplitude modulated signal with sidebands that extend out below and above the carrier.? The shape and power density of the sidebands is a function of keying speed and keying waveshape.? This is what the spectrum of a 20 WPM CW signal with a 4 msec rise and fall time looks like:



To insure that no lower sideband energy greater than 30 dB below the carrier was outside of the band edge you would have to put the carrier about 100 Hertz about the band edge, 14000.100.

73, David, W1HKJ

On 6/2/21 9:35 AM, Mel Marcus wrote:

interesting question if at 14000 and you operate CW-U you would still be legal? , correct?

Mel?
NE9A
From: [email protected] <[email protected]> on behalf of K3EUI Barry via groups.io <k3euibarry@...>
Sent: Wednesday, June 2, 2021 7:20 AM
To: [email protected] <[email protected]>
Subject: Re: [winfldigi] Cw help
?
Oh... ?one more observation.

Why is the rig set to a VFO dial frequency of ? 14.000000 MHz ?
Any CW signal puts you OUT of the ham band lower edge

de ?k3eui

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