Cheap EM sensor using oscilloscope
Cheap EM sensor using oscilloscope
(OP)
Would it be possible to make a cheap and quick EM sensor system using 100 MHz oscilloscope and how would I go about this?
I would like to detect and quantify EM to assess shielding.
Broad range of frequencies.
Thanks
I would like to detect and quantify EM to assess shielding.
Broad range of frequencies.
Thanks





RE: Cheap EM sensor using oscilloscope
But, there are probes for E and H fields that work quite well. I have a set of probes from Credence Technologies, Santa Cruz, CA that I have used for, I think, around 20 years.
There are probably others, this set is named ScanEM-C Model CTK015. Not very expensive. Can also be used without scope - LEDs show relative field strength.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Cheap EM sensor using oscilloscope
Keep the wavelength in mind, but even HF can have small hotspots.
RE: Cheap EM sensor using oscilloscope
Note that this really works better with a spectrum analyzer or a signal strength meter. The noise floor on an oscilloscope is much to high to see emissions that will cause you to fail FCC/CISPR emissions tests.
John D
RE: Cheap EM sensor using oscilloscope
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Cheap EM sensor using oscilloscope
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RE: Cheap EM sensor using oscilloscope
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Cheap EM sensor using oscilloscope