Hi Michael The FCC is not going to state any specific table material requirement. While they recommend material like XPS (Styrofoam - an extruded polystyrene foam) above 1GHz, the only requirement is that the table be non-conductive at whatever frequency you are measuring.
ANSI C63.4 says similar in that the table or other support surface used to raise the EUT to the designated height is to be nonconductive. ANSI recommends “A method for evaluating the effects of the table on EUT radiated emissions is given in subclause 5.9 of CISPR 16-1-4:2007 for frequencies up to 1 GHz.” It is up to the test lab to justify the material used and show its non-conductive nature if other than generally accepted materials such a Styrofoam are used above 1GHz. Thanks Dennis Ward Senior Certification Engineer PCTEST This communication and its attachments contain information from PCTEST Engineering Laboratory, Inc., and is intended for the exclusive use of the recipient (s) named above. It may contain information that is confidential and/or legally privileged. Any unauthorized use that may compromise that confidentiality via distribution or disclosure is prohibited. Please notify the sender immediately if you receive this communication in error, and delete it from your computer system. Usage of PCTEST email addresses for non-business related activities is strictly prohibited. No warranty is made that the e-mail or attachment(s) are free from computer virus or other defect. Thank you. From: Sundstrom, Mike [mailto:[email protected]] Sent: Friday, April 25, 2014 9:47 AM To: [email protected] Subject: [PSES] Foam Table Documentation Hello, I have been asked to find where in the FCC/EU specifications it documents the use / requirement for the foam table on the test site. ANSI maybe? I know it is a best engineering practice, but I’m having a hard time finding it in writing. I have been audited several times and even had notices when it wasn’t in use on an OATS. Michael Sundstrom Garmin Compliance Engineer USA (913) 440-1540 _____ CONFIDENTIALITY NOTICE: This email and any attachments are for the sole use of the intended recipient(s) and contain information that may be confidential and/or legally privileged. If you have received this email in error, please notify the sender by reply email and delete the message. Any disclosure, copying, distribution or use of this communication (including attachments) by someone other than the intended recipient is prohibited. Thank you. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
