We use two dome cameras: one is mounted closer to the antenna on the left side, the other is closer to the EUT on the right side. We set up the EUT so the indicator is visible in x, y and z axis orientations. Fault indication can be wired to external LEDs if necessary.
Of course, alarm systems provide fault indication by design. Consumer product performance is more difficult to assess. David From: [email protected] [mailto:[email protected]] Sent: Thursday, January 16, 2003 5:46 PM To: [email protected] Subject: RE: Video Cameras for EMC Test Monitoring How do you view the EUT at 180 degee orirentation if the camera is looking at it backside? Charlie Martin From: [email protected] [mailto:[email protected]] Sent: Thursday, January 16, 2003 1:23 PM To: [email protected] Subject: RE: Video Cameras for EMC Test Monitoring If the camera is in a can, mesh or otherwise, and the can is bonded to the skin of the chamber, then is doesn't matter whether the control and power are copper or fiber. In effect, the cables are outside of the chamber. Special filters and connectors are not needed. Our dome is mounted in the corner of the chamber, behind the antenna. We have a clear view of the front of the EUT, and the orientation of the antenna if we desire with the help of the pan/tilt/zoom capability of our camera controller. Best regards, Don Umbdenstock Sensormatic > ---------- > From: [email protected][SMTP:[email protected]] > Reply To: [email protected] > Sent: Thursday, January 16, 2003 9:28 AM > To: [email protected]; [email protected] > Subject: RE: Video Cameras for EMC Test Monitoring > > 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 > > -----Original Message----- > From: jules [mailto:[email protected]] > Sent: Thursday, January 16, 2003 6:58 AM > To: [email protected] > 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 > -----Original Message----- > From: Ken Javor [mailto:[email protected]] > Sent: 15 January 2003 19:29 > To: Sandi McEnery; [email protected] > 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" <[email protected]> > To: <[email protected]> > Subject: Video Cameras for EMC Test Monitoring > 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) > [email protected] > <mailto:[email protected]> > > > > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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