Great point Tom. Thanks.
john
----- Original Message -----
From: "Tom Hammond" <[EMAIL PROTECTED]>
To: "n3drk" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; "elecraft"
<elecraft@mailman.qth.net>
Sent: Sunday, January 22, 2006 3:30 PM
Subject: Re: [Elecraft] spectrogram
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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