On 9/29/2016 4:14 PM, Ghery S. Pettit wrote:
Preventing harmful interference in all cases is a mighty tough call. How low
do you need to limit emissions? How high a signal must the product be immune
to? The limits in Part 15 provide a reasonable level of protection, assuming
the potential victim is far enough away. Co-located devices may need more
suppression.
That's why I think putting it in the form of a warranty is the best way
to get manufacturers to pay attention to it. They know if they do pay
attention to suppressing interference, the warranty will very rarely be
used. Another way is an implied warranty of fitness; I understand the UK
and Europe enforce implied warranties of serviceability, which US
merchants often refuse to recognize, but twelve states (and the District
of Columbia) don't allow them to. See
http://consumer.findlaw.com/consumer-transactions/what-is-an-implied-warranty-.html
Of course, this isn't legal advice, and I'm neither an attorney nor
authorized to give legal advice.
I do suspect some manufacturers would refuse to submit bids if a
customer firm tried to make them eat the cost of noncompliance, not with
the limits, but by causing harmful interference, forbidden even if the
victim is right next to the product.
Remember the gas oven that got turned on by a cell phone? Here's another
one that took *months* to pin down – and had a simple fix the
manufacturer might have applied for less than a dollar each:
http://www.apartmenttherapy.com/help-my-kitchen-is-possessed-w-147015
Cortland Richmond
KA5S
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