Any time you use an audio-based oscilloscope, monitoring the AF
output from your receiver, you have to be aware that whatever you see
on-screen is not only representative of the signal itself BUT to a
bigger extent it reflects those characteristics placed upon it by the
receiver itself (it's filters, the AGC characteristics, etc.). As a
result, you should always remind yourself that what you're looking at
(if it's coming thru the receiver's audio system) is not necessarily
what is actually 'on the air'.
73,
Tom Hammond N0SS
At 11:55 AM 1/22/2006, n3drk wrote:
Listed below is a link for a Windows based Oscilloscope. This can be
used for transmitting but I do not know about receiving. What do you
guys think? By the way thanks to all for responding to my original post.
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=3428
73s
john-n3drk
----- Original Message ----- From: <[EMAIL PROTECTED]>
To: "n3drk" <[EMAIL PROTECTED]>; "elecraft" <elecraft@mailman.qth.net>
Sent: Sunday, January 22, 2006 9:31 AM
Subject: Re: [Elecraft] spectrogram
John,
Sjpectrogram is a FFT (Fast Fourier Transform) spectrum analyzer
program. It's display is amplitude versus frequency. What you need
to display the "Christmas Tree" and CW waveforms is
an oscilloscope display. In the case of the Christmas Tree, the
oscilloscope is set up to display RF drive or audio on the
horizontal axis and RF output on the vertical axis (the
oscilloscope is in X-Y mode, with x=drive, Y=RF out). For the cw
envelope you use the oscilloscope in the conventional mode where
the horizontal axis is time and the vertical axis is voltage. So
the short answer to your question is "NO".
jim, AB4CZ
can Spectrogram also show the
Christmas Tree effect for SSB? How about the rise and fall of the CW note?
What about in receive mode. Can it also show these for the received station?
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