Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
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Subject: Re: Aylward, Engelhardt: Noise in a transient sim?
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Date: Sat, 26 Oct 2002 11:01:40 +0100
NNTP-Posting-Date: Sat, 26 Oct 2002 11:01:54 BST
"Bevan Weiss" wrote in message
> I agree with what you are saying Kevin. A signal of 7GHz does not
> necessarily imply that the bandwidth of the intelligence is 7GHz. You
> very well sample at 1Hz, if that is greater than 2x the intelligence
> bandwidth. You also require a mixer however to remove the frequency
> Otherwise you'll get all that other aliased crap as well as your
> And other peoples intelligences just get in the way of a problem like
The interesting thing about this, is that it is a well accepted by
people in the know, just what the sampling oscilloscope con is, and it
all boils down to you cant get something for nothing..., cake and eat
In fact, I thought I gave a pretty reasonable, not too technical,
explanation of how you can use a bank of mixers (f, 2f, 3f..), with say,
1hz noise filters, that would enable recovery of an arbitrary shaped,
but repetitive signal. In this case, its pretty clear that the BW is the
sum of each of the mixers filtered output, not the BW spanned by n*f.
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Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.