I use off-the-shelf dome surveillance cameras with an x-y-z+zoom controller in the chamber at 20 V/m. Smoke covers are available for the camera mechanism. Contact me off-line for model numbers. We turn the cameras off during emissions measurements. Our antenna-EUT axis is somewhat diagonal; we locate the domes toward the side, far off-axis. Fiber We send video as Ethernet packets over fiber, but converters are PC-based and hence large metal objects - not good in an anechoic chamber. Video over twisted pair may be cleaner than 75-ohm, but what about the power-supply cable? David
From: jules [mailto:ju...@hursley-emc.co.uk] Sent: Thursday, January 16, 2003 6:58 AM To: emc-p...@majordomo.ieee.org Subject: RE: Video Cameras for EMC Test Monitoring You need to be carefull if you are running copper wires out to the remote display as these will pick up the fields. Hursley EMC Services have just developed a low cost camera for 10V/m, and we have built a converter to run the image, pan/tilt and zoom etc out on two fibre optic leads. we do plan to produce this, but it is unlikely to be ready before mid 2003. rgds, Jules Jones From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: 15 January 2003 19:29 To: Sandi McEnery; emc-p...@majordomo.ieee.org Subject: Re: Video Cameras for EMC Test Monitoring Just put an off-the-shelf unit from Best Buy or Circuit City in a metal screen box, make sure the screen is very close to the lens, that way it is totally out of focus and only causes a dimming of the picture, not visible distortion. From: "Sandi McEnery" <smcen...@ustech-lab.com> To: <emc-p...@majordomo.ieee.org> Subject: Video Cameras for EMC Test Monitoring List-Post: emc-pstc@listserv.ieee.org List-Post: emc-pstc@listserv.ieee.org List-Post: emc-pstc@listserv.ieee.org List-Post: emc-pstc@listserv.ieee.org Date: Wed, Jan 15, 2003, 12:34 PM We are in the process of purchasing video cameras for monitoring EMC Immunity testing up to 10V/M. Pricing for cameras designed to withstand 20V/M is way high.... .... do any of you successfully use cameras that are not as sturdy? Or ... does anyone know where we might purchase a used system?? Sandi McEnery US Technologies 770-740-0717(ph) 770-740-1508 (fax) smcen...@ustech-lab.com <mailto:smcen...@ustech-lab.com>
