Re: An unusual Oscilloscope phenomenon

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#920

From: Joerg
Date: Mon, 29 Jun 2009 17:30

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Michael A. Terrell wrote:
> John Larkin wrote:
>> At the receive (instrument) end, the ungrounded end of the coax shield
>> becomes the hot side of a resonant "vertical" antenna. Any voltage
>> there becomes 100% common-mode signal on the inner twisted pair.
>>
>> What's wrong with a little current in the shield? The signal pair
>> isn't affected. But volts, or tens of volts, of common-mode RF can be
>> nasty.
> 
> 
>    That's the reason you see lots of six inch wide copper bonding straps
> in radio studios. They use one and a half inch straps to connect between
> the equipment, and the bonding straps.
> 

Same in this here lab :-)

-- 
Regards, Joerg

http://www.analogconsultants.com/

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From: Joerg <invalid@invalid.invalid>
Newsgroups: sci.electronics.design,aus.electronics
Subject: Re: An unusual Oscilloscope phenomenon
Date: Mon, 29 Jun 2009 10:30:17 -0700
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