One problem, Steve. Open area test site measurements at 10M require maximizing the measured emanation by raising the receive antenna from 1 to 4m. At a height where the bounce path (off the Ground Plane) and direct path are additive, the maxima will be measured. Alternate, ie semi-anechoic, sites must have a reflective floor and sufficient height to allow a 1-4m scan height. Note that the 4m max is to the phase center of the antenna. Additional height is required to account for antenna dimensions in vertical polarization, absorber thickness and minimum separation distances from the antenna to absorber. I believe that you will need approximately 20' inside height, minimum.
Doug Frazee Lead Compliance Engineer Windermere Military/Commercial Compliance Laboratory Annapolis, MD USA [email protected] -----Original Message----- From: Steve Kuiper [SMTP:[email protected]] Sent: Saturday, November 21, 1998 12:30 PM To: EMC-PSTC Subject: 10m Indoor OATS Facelift Dear Members, An associate of Aegis Labs has potential access to a 10' H X 40' W X 60' L Shielded Enclosure for RF testing purposes. It is our intention to share in the cost for having this existing chamber upgraded to the level where we can meet the FCC's, ANSI C63.4-1992 NSA measurements. We are attempting to calculate the time, money and technical hurdles for accomplishing such a difficult task. Anyone have experience or know of a specific consultant who can provide advice and direction. Thanks for your input. Kind regards, Steve Kuiper President --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
