I agree, there are a lot of look-alike cells on the market: None of which are truely compliant to the 1000-4-3 requirements, although many have made various claims in the past (including us!)...
There is a new amendment to 1000-4-3 that deals specifically with the issues of using TEM cells, and provide guidance for TEM cells that can be used for compliance testing. If you send me a mail address, I can get a copy sent to you. .... I would be worth having the info if your interest is for the long term and compliance testing.... For pre-compliance, KeyTek makes the G-Strip, of which 200 units are in service. There are others -- R&S, Chase, Wayne Kerr, and others (about 18 or 20 companies) make the cells -- KeyTek and some others sell systems as well as cells (amps, s/w etc... included), some offer emissions packages, --- one has a VERY small access door -- etc... Lots of choices. Let me know if you want any more info from us.... [email protected] > ---------- > From: [email protected][SMTP:[email protected]] > Reply To: [email protected] > Sent: Friday, January 16, 1998 1:50 PM > To: [email protected] > Subject: Pros/Cons of Using TEM Cells for 801-3, 61000-4-3... > > I'm looking for a very brief summary from actual users of the > practical > pros and cons of using the newer TEM cells for immunity testing. > Don't > waste your time going over the basic physics behind TEM cells. You > are > welcome to submit comments directly to me without copying the entire > group. > > IMO the TEM cell is the preferred technique over the > semi-anechoic/anechoic > room wherever uniform field volume, EUT size, and the frequency range > is > compatible with the cell capabilities. Historically, older editions > of > 801-3 (1984) actually included drawings of stripline and TEM cells to > facilitate their use. Now, there are the well known GTEM and other > variants that extend the field requirements for larger EUTs up to 1 > GHz. > > Reason - I'm considering buying a new dual septum variant on the TEM > cell; > the vendor makes some interesting claims about improved test > uncertainty.... The entire unit takes 80 x 80 cm of floor space plus > support equipment (a PC). This would handle the majority of our > products, > and pay for itself on the basis of the value in floor space over that > required for a typical shielded room (assuming $100 per square foot). > (I > can't get additional space for a full shielded room for about 3 > years.) > > Disclaimer - If curious, I direct you to the vendor's web site > http://www.waynekerr.com for details. And, uh, don't pay too much > attention to the fact that the vendor also uses a couple of our > products to > run the cell. (Substitute wolfish grin.) > > Regards, > Eric Lifsey > Compliance Engineer > National Instruments > > >
