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Near field probe measurement
Remy Hurx , 09-30-2022, 01:24 PM
Hi Min/Robert,
Hopefully I don't ask something very stupid... but I just bought a DSA815 to get some grip on EMI on my boards and also for the fun of learning. I know near field measurement is only an indication of E/H fields and a measured apparent higher (less negative) dB signal is not always a sign of something bad happening. But can we say for signals with a specific +x dB (compared to 'normal' ) the likelihood of it being a bad sign is high in case of a specific height Y above the PCB?
gr Rémy
Hopefully I don't ask something very stupid... but I just bought a DSA815 to get some grip on EMI on my boards and also for the fun of learning. I know near field measurement is only an indication of E/H fields and a measured apparent higher (less negative) dB signal is not always a sign of something bad happening. But can we say for signals with a specific +x dB (compared to 'normal' ) the likelihood of it being a bad sign is high in case of a specific height Y above the PCB?
gr Rémy
Mach One Design , 10-04-2022, 02:12 PM
Hi Remy,
Great to see you here. Well, it is not a stupid question at all. I would guide you to this article. See http://emccompliance.co.uk/wp-conten...gic-Loop-3.pdf , section 4. and https://www.ramayes.com/Data%20Files...st_Methods.pdf
Great to see you here. Well, it is not a stupid question at all. I would guide you to this article. See http://emccompliance.co.uk/wp-conten...gic-Loop-3.pdf , section 4. and https://www.ramayes.com/Data%20Files...st_Methods.pdf
Remy Hurx , 10-05-2022, 10:59 AM
Hi Min,
thank you very much! It’s clear to me now
Both articles are very interesting.
thank you very much! It’s clear to me now
Both articles are very interesting.
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