Topband: keying waveform-ARRL savy
Bill Aycock
baycock at direcway.com
Tue Jan 27 08:51:16 EST 2004
I am not too sure the ARRL-QST staff has anyone who understands this
subject and the ways to measure it. I have been puzzled/confused by the
scope depiction of the key closure- resulting waveform shown in QST for
some time. Take a look at the ORION review in the recent QST (January, pg
66, fig. 2). There is a delay from key closure to signal, which is
possible, but how and why does the signal start down BEFORE the key is
opened? This lack of coordination between key closure track and signal
track on the scope has a long history. The picture is supposed to be of a
dual trace scope showing the results of measurements of a critical
characteristic.
I actually hope I have a lack of understanding, here, because I would like
to think they are more professional. It looks like someone did a
cut-and-paste on two pics at different time scales. I have asked the QST
people and got a "trust us- you're too stupid to understand" answer.
Can someone explain this to me?
Bill Aycock - W4BSG
Woodville, Alabama
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