John,
 
Are you aware of the UK GTEM users group?  http://www.gtemuser.org.uk/
 
Luke Turnbull

>>> "Farley, John" <[email protected]> 28 August 2007 15:46 >>>


All,

I've been reading through past posts on GTEM cells.  The limitation that seems 
to be mentioned the most is the difficulty in cable manipulation/ cabling being 
part of the finite EUT test volume available limits the accuracy/ correlation 
of test data below 230 MHz.  I'm looking into purchasing GTEM cells as a 
supplement to our anechoic chamber.  They are appealing due to the fact that 
they are cheaper and we can fit sveral of even the largest TEM cell in the area 
taken up by one chamber.   My first question would be whether practical 
solutions to the cable manipulation issue have been identified and if so what 
is it?

I also know that the reading from the septum varies depending on location in 
the test area.  What is the group's experience with repeatability from 
emissions scan doing repeated test on the same product?  I'm just trying to get 
a feel for how practical TEMs are for emissions testing.

Any information you could provide me would be appreciated.  Thank you.

Regards,

 

John P. Farley

Senior Compliance Engineer

Garmin International

1200 East 151st Street

Olathe, KS 66062

 

P: 913-397-8200  

F: 913-397-8282

 

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