A chirp can't be seen visually on an oscilloscope (well, maybe on a
panadpter or spectrum analyzer if it is a very big one).
A chirp is a change in frequency of the transmitted signal. It is not
the same as a click, which is a wide signal caused by too-short rise and
fall times of the keyed envelope, or a badly shaped envelope. You can
see the envelope shape on an oscilloscope. But the change in frequency
caused by a chirp is very small in comparison with the frequency of the
signal.
The way to detect a chirp is to listen to the transmitted signal on a
second receiver. Your ear is very sensitive to changes in pitch.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.
On 14/07/2020 9:29, dl2ki wrote:
Hi,
since someone told me that there is a small "chirp" in my K2-CW signal, I
would like to check the signal visually.
How can I display the CW Key envelope as shown in the document "Elecraft K2
Keying Modification Instructions", page 1.
An oscilloscope "Tektronix 2465A" is at my disposal, but I have little
experience with measuring instruments, since I only use them occasionally.
Thank you and 73
Wolfgang
DL2KI
--
Sent from: http://elecraft.365791.n2.nabble.com/
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