[AusNOG] Earthing problems and switching infrastructure.

[Peter Tiggerdine]

the radio station is 6PR so it's AM.

There's no onsite PABX or music being fed into it.

It's happens on one floor of a multi storey building.

Is the consensus that this type of interference can cause network
performance problems?
Regards,

Peter Tiggerdine

GPG Fingerprint: 2A3F EA19 F6C2 93C1 411D 5AB2 D5A8 E8A8 0E74 6127


On Mon, Mar 20, 2017 at 5:07 PM, Paul Wilkins <paulwilkins369 at gmail.com> wrote:
> Any analog telephony streaming music on hold from the internet? So just
> appears it's coming over the air, but actually EMI bleeding from their MOH
> server?
>
> Kind regards
>
> Paul Wilkins
>
> On 20 March 2017 at 17:40, Damien Gardner Jnr <rendrag at rendrag.net> wrote:
>>
>> Few questions..
>>
>> How 'local' is the radio station?  Within a km? or just within 50km?  AM
>> or FM station?
>>
>> Do they hear the radio station if they touch the probe to themselves?
>>
>> Does the customer have a PABX with that radio station fed into it from a
>> connected radio?
>>
>> If no fed PABX, and the station is FM that is VERY unusual.  AM, I could
>> understand, if there's a IF being generated by some equipment which is
>> modulating at almost exactly the station's frequency.
>>
>> I'd be finding the building's MEN bond, and testing there, then working
>> your way back out to the individual equipment, and see where it's
>> introduced.   That said, I'd probably just call a qualified electrician, as
>> they're more likely to spot the issue, and you'll likely need to take the
>> front off the switchboard to get at the bond point.
>>
>> On 20 March 2017 at 17:24, Peter Tiggerdine <ptiggerdine at gmail.com> wrote:
>>>
>>> Hi All,
>>>
>>> I've got a customer that can touch any steel object that's connected
>>> to earth and listen to the local radio station with a tone generator
>>> wand. I've chalked this up an earthing problem touching a copper rod
>>> or possibly building antenna.
>>>
>>> The question is weather this is likely to impact switches and possibly
>>> network performance. I'm airing on the side of very unlikely but it's
>>> all frequency so unsure.
>>>
>>> Happy for off list or on list replies.
>>>
>>> Regards,
>>>
>>> Peter Tiggerdine
>>>
>>> GPG Fingerprint: 2A3F EA19 F6C2 93C1 411D 5AB2 D5A8 E8A8 0E74 6127
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>>
>>
>>
>>
>> --
>>
>> Damien Gardner Jnr
>> VK2TDG. Dip EE. GradIEAust
>> rendrag at rendrag.net -  http://www.rendrag.net/
>> --
>> We rode on the winds of the rising storm,
>>  We ran to the sounds of thunder.
>> We danced among the lightning bolts,
>>  and tore the world asunder
>>
>>
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>
>
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