Hi Ralph,
The result is not caused by sampling rate, 5 GSa/sec in this case. The result
will be the same on any scope!
All instrumentation is working as designed and intended for measurements of
signals like this. An analog scope would display exactly the same waveform
(used to do the experiment with an analog scope a while back).
Doug
On Fri, 26 Jan 2018 23:13:21 +0000, Ralph McDiarmid wrote:
Sample rate aliasing
When displaying a 40MHz signal on a DSO, I would want to select a time base
that provided at least 400MS/s sampling rate.
If you were to use a 100MHz analogue scope, I would expect the effect to
disappear.
That’s my 60s guess
Ralph McDiarmid
Product Compliance Specialist
Solar Business
Schneider Electric
D604-422-2622
3700 Gilmore Way
Burnaby, BC, V5G 4M1
Canada
From: Doug Smith [mailto:[email protected]]
Sent: Friday, January 26, 2018 2:50 PM
To: [email protected]
Subject: [PSES] Measurement dilema
Hi All,
Can you explain the result in this video I just made? Scope plots of the same
two nodes are completely different. Probes and scope are operating normally, no
problem with the equipment itself.
If you have been to my seminars you know the answer, please do not post the
answer unless you have not seen this experiment until now.
Hint 1: There are no EM fields radiating from the shielded box affecting the
probes.
Hint 2: There are no active components inside the box.
https://youtu.be/qj-HBFMEJiY
Doug
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
______________________________________________________________________
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher <[email protected]>
David Heald <[email protected]>
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<[email protected]>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher: <[email protected]>
David Heald: <[email protected]>
