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Re: [TenTec] IMD Measurements - Yaesu/Inrad vs Orion

To: tentec@contesting.com
Subject: Re: [TenTec] IMD Measurements - Yaesu/Inrad vs Orion
From: Ken Brown <ken.d.brown@verizon.net>
Reply-to: tentec@contesting.com
Date: Thu, 23 Dec 2004 16:54:51 -1000
List-post: <mailto:tentec@contesting.com>
Ken Brown wrote:

Which is the speed needed to reach those key clicks with the keyer ???

Key clicks are a result of the leading and trailing edges of the keying envelope either being to steep or having overshoot and ringing or both. If the keying envelope is such that key clicks are produced, then they will be produced at any WPM speed.

I should have added that there are some other possible causes of key clicks, such as PLL settling time where one or more oscillators get switched between RX mode frequencies and TX mode frequencies. This kind of click is perhaps more accurately called chirp. If the rig switches between TX and RX modes on every dit and dah (ie. it is operating in QSK mode) then this chirp will occur at the same time as keying envelope caused clicks occur, the beginning and possibly the end of dits and dahs. AND it will occur at any WPM keying speed.


DE N6KB


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