Sean, It's an acronym. It stands for "Transverse Electro Magnetic. It means that there won't beany electric field or magnetic field in the direction of propagation. Regards, Jim Regards, Jim > -------- Original Message -------- > Subject: Re: [EE] RF anechoic chamber > From: Sean Breheny > Date: Fri, October 15, 2010 4:05 pm > To: "Microcontroller discussion list - Public." >=3D20 >=3D20 > I had never heard of a TEM cell before but I found this article which > is a good introduction: >=3D20 > http://www.emcs.org/acstrial/newsletters/summer08/pp2.pdf >=3D20 > Sean >=3D20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .