That bit about PCs and phones was surprising, but I guess not unexpected. I have built many "EMI test versions" of code so various products can be taken to the test house. We don't go to those extremes: typically, we'll run as close to worst case as we can get, but nothing unrealistic. Then again, no one but us is loading code onto our devices, so it's not like a PC where you have no control over what it's running.
One company I have worked with had an internal rule for "radiated emissions": You had to be 10dB (1 order of magnitude) underneath the limits before going for a formal cert. Non-negotiable.
Part of the reason for this rule was that they:
1) OEMed their products.
2) Sold products that could be used in complex and bespoke CAN networks with goodness knows what else.
3) There was a chance of interfering with Marine VHF radio which is used for emergencies. The EU rules were (still are) not actually strict enough for preventing interference with that band.
Comments
That bit about PCs and phones was surprising, but I guess not unexpected. I have built many "EMI test versions" of code so various products can be taken to the test house. We don't go to those extremes: typically, we'll run as close to worst case as we can get, but nothing unrealistic. Then again, no one but us is loading code onto our devices, so it's not like a PC where you have no control over what it's running.
One company I have worked with had an internal rule for "radiated emissions": You had to be 10dB (1 order of magnitude) underneath the limits before going for a formal cert. Non-negotiable.
Part of the reason for this rule was that they:
1) OEMed their products.
2) Sold products that could be used in complex and bespoke CAN networks with goodness knows what else.
3) There was a chance of interfering with Marine VHF radio which is used for emergencies. The EU rules were (still are) not actually strict enough for preventing interference with that band.