Router RFI (interference)
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Router RFI (interference)
03-04-2012 6:17 PM
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Anyway i use amateur radio and the router interferes causes white noise with a certain radio frequency 10Mhz
The O2 router was fine , so what happens next as this does not comply within the law and is not so good ?
Re: Router RFI (interference)
03-04-2012 7:40 PM
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Re: Router RFI (interference)
03-04-2012 7:46 PM
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Re: Router RFI (interference)
03-04-2012 7:52 PM
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Re: Router RFI (interference)
03-04-2012 8:30 PM
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Quote from: purleigh As far as I remember, EMC testing below 30MHz is only for military applications (MIL-STD-461).
I can assure you it covers all amateur bands they should be notched in between frequency's
As for the O2 router i have to send it back !
Re: Router RFI (interference)
03-04-2012 9:13 PM
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Re: Router RFI (interference)
04-04-2012 9:29 AM
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PSU?
Mains Cable?
ADSL Cable?
LAN Cable?
Problem is that router should meet certain specifications on its own, but may fail to meet these once it's installed due to how it's installed and which cables are used.
And the cables supplied with the unit may not be exactly the same type and specification of cable that it was tested with...
Re: Router RFI (interference)
04-04-2012 10:01 AM
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Quote from: oldskooldaze Anyway i use amateur radio and the router interferes causes white noise with a certain radio frequency 10Mhz
Hi,
From experience I suspect that this is caused by the switch mode power supply we use, do you have any way of testing this? It would be hard to pin it down to the PSU as the switching frequency would change depending on the load (so powering down the router would cause the PSU switching frequency to drop).
Matt
Re: Router RFI (interference)
04-04-2012 10:49 AM
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Quote from: Matt
Quote from: oldskooldaze Anyway i use amateur radio and the router interferes causes white noise with a certain radio frequency 10Mhz
Hi,
From experience I suspect that this is caused by the switch mode power supply we use, do you have any way of testing this? It would be hard to pin it down to the PSU as the switching frequency would change depending on the load (so powering down the router would cause the PSU switching frequency to drop).
Matt
Its definitely the power supply , i have tried ferrite rings ballun etc but to no avail , any ideas as its causing me grief ?
You were right about powering down the router would cause the PSU switching frequency to drop.
Re: Router RFI (interference)
04-04-2012 10:55 AM
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Also, the actual rings seem to work better than the split cores, especially if you can get a couple of turns on them.
Re: Router RFI (interference)
04-04-2012 11:05 AM
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Quote from: knowdice If it's a "wall wart" style may be change for one which has a mains lead, then you can put additional ferrite rings on both input and output.
Also, the actual rings seem to work better than the split cores, especially if you can get a couple of turns on them.
All good advice but i don't see why i should pay for another supply
Re: Router RFI (interference)
04-04-2012 11:07 AM
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But sometimes it's easiest to go for the pragmatic solution and just fix things...
Re: Router RFI (interference)
04-04-2012 4:26 PM
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I'm afraid we don't have any alternative PSUs available that you could use. I've gone back to our supplier and they've not seen this before, nor do they have alternative PSUs available.
We'll look into this a little more next week when their technical expert is back in the office.
Thanks,
Matt
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- Re: Router RFI (interference)