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Hello Mr. Cordaro, I can follow your explanation – essentially it all comes to the right expectations/assumptions! In that respect I must admit I’m unaware of an OEM requesting the mentioned 355 mA test level for operational mode (right test category!?) immunity testing and will consequently forward that question to all the OEMs participating:
What is the target level for EMI stress to design the 10SPE system against (considering testing categories/criteria)?
In order to get realistic estimation on noise levels we need to clearly define our starting point,
so feedback from OEM with specific levels is required at that stage! In that respect we need answers to the following specific questions:
Also, related to your presentations, allow me to notice, that the assumption of CW type of stress may not necessarily be representative for the worst case!
Most OEMs require also AM modulated and some even Pulse modulated stress – autocorrelation function can yield worse results in specific cases in those scenarios! Best regards, Galin Ivanov From: Jay Cordaro <jay.cordaro@xxxxxxxxxxxx> Hello Mr. Ivanov, To follow-up to your question on the call, With nodes floating 5cm above ground plane NodeA measured 105mV at 16.67MHz. Mode conversion
for harness was measured at -51dB at 16.67MHz, limit is -43dB. See page 9 of presentation. Scale measured CW noise from 105mVpk-pk by 8dB. That's where I got 263mVpk-pk. Assuming linearity, for 355mA test level, scale 263*(355/200) = 467mVpk-pk.
In band. Let's call it 500mVpk-pk or 178mVrms. Hope this helps. regards, Jay Cordaro On Wed, May 9, 2018 at 3:51 AM, Galin Ivanov <Galin.Ivanov@xxxxxxxxxxxxx> wrote:
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