EMC regs
In Europe, CE is a self certification but you had better be prepared to show your evidence. For equipment in the home, the relevant standard is EN55022B. All that should have to happen is that someone complains to the appropriate authority and force the manufacturer to provide the evidence.
As we have cartloads of equipment in every household, it seems, that meet this standard and NOT interfering with world + dog, then if this equipment met the standard, it would also not cause interference.
This standard is the harmonised standard compatible with FCC part 15B and as someone who has had to get through both (and some other aerospace standards) it's a bitch.
Does the powerline equipment manufacturer have guidelines on usage? (the usual weasel way out). The length of powerline, it's physical shape, the material (the velocity of communication is NOT the speed of light in copper or aluminium sheathed cable) all cause the effective radiation to differ.
On the bandwidth comment, the rule is simple: The more data you wish to pump, the wider the bandwidth required for a given bit error rate ( or S/S+N if you prefer).
Spalttering the spectrum such that it causes (in the words of the standard) 'harmful interference' invalidates the CE mark in Europe and should be dealt with as such - of course, we don't want to annoy all those people selling the stuff and generating all that lovely VAT, do we.
Grenade for the crap kit.
Biting the hand that feeds IT
