![]() The primary aim will be REPEATABILITY, and not accuracy. I can also try "bodges" to the pcb to attempt to attenuate / modifiy the RF energy being emitted. and ETS-Lindgren have an EMC measurement solution for you. ![]() Of course, the results aren't going to be accurate in any way, but should give an idea of where we need to focus our changes! So, using the metal box (with all it's reflections etc), mounting the EUT in it in a fixed position, relative to the antenna, i can run simple tests (like run the processor off a 9v battery and not the DC:DC etc) and get an idea of the relative contributions. Solutions for EMC Test EMC Solutions wherever you are in your development cycle Wherever you are in your development cycle, Keysight Technologies, Inc. The idea is to cheaply, and quickly get an idea of the relative contribution of each component to the overall emissions level. So, what i plan to do is to test the device in stages, ie enable / disable various bits of the h/w on the pcb (like the dc:dc, or the CAN buses etc) and to enable/disable various bit of code and processor resource. (think plastic enclosure, 2 layer pcb, minimal i/o filtering etc) As is the way of the world, things change, and there is now a requirement to use this device, with the least changes possible, in a MIL spec environment that meets the full MIL spec EMC limits! Yes, yes, i know how stupid that sounds, but bear with me here! So, the device was tested (in a certified test chamber to MIL limits) and, no surprises, failed miserably! What i am trying to do here is to give the customer my best estimate of what it would take to make this device (or more accurately a version of it) meet the MIL specs, with the minimum changes possible. The original use did not require any EMC compliance. although it was designed with "best practice" it was also designed to be lowest cost and simplest to manufacture. With its specific requirements for the test site, Frankonia’s FAC-3 is supremely prepared to meet our customers’ demands.Some more background info: The EUT was never designed to meet any EMC standard. Without the reflections from the floor, a height scan is no longer necessary. It is designed as full compliant chamber for measurements under free-space conditions and is based on CISPR 16-1-4 as a test site without ground plane. The FAC-3 L is the extended version of Frankonia’s fully anechoic chamber solution at 3,0m measuring distance for EMC tests on table top positioned EUT’s as well as on floor-standing EUT’s.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |