http://www.pimfg.com/product_list.asp?c
ild=N&kwid2=5045%20Camera&keywordx=5051%20Mini%20Camera is a good place to
start.
A very small camera at the back of the chamber or in a corner is no big deal.
The cabling is more of a worry. If you can bury it behind your absorbers or
in the cracks between them, that helps.
On Wed, 19 Aug 2009 22:52:53 EDT [email protected] writes:
Hi Orin,
Thanks for the quick response. I thought of making a chassis around the
camera like that but was concerned about how the extra metal would impact the
NSA data. Everything used in testing shall be in place when doing volumetric
NSA. Have you seen any impact from the camera on NSA measurements. It is
located behind the antenna so I would think it shouldn't.
If I choose this route, do you have a certain camera to recommend?
Thanks,
Tim
In a message dated 8/19/2009 7:35:27 PM Pacific Daylight Time,
[email protected] writes:
Pick any reasonable camera. Mount it in a metal box with a
suitable hole.
I've even seen ammo cans used with good results, usually to protect the camera
>from HIRF testing rather than protect a test from the camera. You already
know how to prep the cable and route it from the box through the chamber wall.
An alternative is to use a camera with a pinhole lens to peek through a small
aperture in the chamber access plate. That way the camera isn't inside the
chamber. Any security camera vendor has this item. Note that this type of
lens has glass elements like any other and is unrelated to the classic pinhole
camera of science fair fame. It has a conical front that is able to image
through a hole typically ~1/8" diameter, hence the name. If cost is no object
and you want a science project, you can implement a fiber optic imaging
solution like the Edmund Standard Flexible FiberScope NT53-134 with a C mount
camera adapter and snake that through the chamber wall, waveguide below cutoff
style.
Orin Laney
On Wed, 19 Aug 2009 21:46:44 EDT [email protected]
<mailto:[email protected]>
writes:
Hello Group,
I'm looking for an EMI compliant camera for use in an
EMI chamber. It is
not possible to wire in an integrated system so I need to use the camera
mounted on a fiberglass tripod behind the antenna. I really do not need any
special zoom capability or remote control. The camera just needs to be there
to give an overall view of the chamber so the EUT and antenna can be
monitored. The camera does need to be quiet for EMI testing so we aren't
taking data from the camera all day long.
If anyone can recommend a certain camera model to use,
that would be very
helpful.
Thanks,
Tim Pierce
TAP Engineering LLC
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