[Halld-controls] Measuring radiated noise - not

[Elliott Wolin]

Hi Mark,

Of course just detecting radiated noise is not good enough.  We need to 
know if the noise will affect the detector readout electronics.   Hard 
to know this except to test in-situ.  Even if we see noise in the 
electronics it may not come from the worst radiating device, as who 
knows which frequencies are most effective in mucking up the readout 
electronics.


On 04/05/2012 04:47 PM, mark stevens wrote:
> Hi Elliott,
>
> The spectrum analyzer with a hand-made antenna is all I have seen used 
> here at Jlab.  I did a property search with the terms "emi" and 
> "noise" and saw nothing.   I have previously used a portable AM radio, 
> tuned between stations, to pick up noise - it is remarkably sensitive 
> (it will pick up SCR noise, for example, like that coming from light 
> dimmers or switching power supplies).  There are commercial products 
> that are "EMI Noise Analyzers", but they are expensive.  Some 
> companies will rent them.
>
> Best Regards,
>
> Mark Stevens
>
> On 4/5/2012 2:08 PM, Elliott Wolin wrote:
>> Hi,
>>
>> Fernands says he currently has no good way to measure radiated noise
>> other than jury-rigging something together using a piece of wire and
>> some sort of spectrum analyzer.  Does anyone know of real system at JLab
>> that can measure radiated noise?
>>
>>
>
>
>
> _______________________________________________
> Halld-controls mailing list
> Halld-controls at jlab.org
> https://mailman.jlab.org/mailman/listinfo/halld-controls

-- 

				Sincerely,
					Elliott


================================================================================


  Those raised in a morally relative or neutral environment will hold
		    no truths to be self-evident.
				

Elliott Wolin
Staff Physicist, Jefferson Lab
12000 Jefferson Ave
Suite 8 MS 12A1
Newport News, VA 23606
757-269-7365

================================================================================

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/halld-controls/attachments/20120405/00ce21c2/attachment.html