[time-nuts] EMI and CE certification

Magnus Danielson magnus at rubidium.dyndns.org
Sun May 10 03:19:26 EDT 2015


Hi,

On 05/10/2015 01:11 AM, Attila Kinali wrote:
> On Sat, 09 May 2015 12:15:47 +0000
> Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
>
>> I spent some time capturing some data today.
>>
>> The measurements is from my $20 loop-antenna in the attic, which is
>> something like 8 meters up and 10 meters besides the lawn-mower loop:
>>
>> 	http://phk.freebsd.dk/time/20150509.html
>
> Uh.. nice...and welcome to the world of self-certification.
>
> I'm pretty sure these devices are not properly EMI tested or rather,
> they were, but the manufacturer cheated (as everyone does with this
> kind of stuff). You can, and IMHO should report these kind of EMI to
> the proper authorities. Devices like this should not be sold and in
> nost european countires are actually illegal (there is a law against
> "knowingly" transmit in a band you are not licensed for). I don't know
> other countries, but at least in Switzerland, the BAKOM is usually quite
> happy to hear about these things, and test devices in their own lab... with
> nice fines for the offending company for not properly testing their products.

Depends. If they use approved frequencies and powerlevels it may be 
fine. In this case it doesn't look like it. There are telemetry 
frequencies allocated, they should use those.

Cheers,
Magnus


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