I'd leave the access point outside the chamber and run a coax through a bulkhead to the antenna inside the chamber (and turn the power down to 1/4 or 1/8 power on the AP). Other than that, use a low-pass filter just under the 2.4 GHz band to knock the fundamental out of your measurement results - at least through 2GHz. Be sure your filter is between your measurement antenna and any preamplification or measurement equipment to prevent possible overload. Any remaining AE sourced emissions should be below the limits - remember that intentional radiators must effectively pass Class B emissions (at least here in the states), so any remaining out-of-band emissions coming off of the AP's antenna should be low enough to have no impact on pass/fail of the EUT itself.
Best Regards, -Dave Heald On Tue, Jan 10, 2012 at 9:13 AM, Pawson, James <[email protected]>wrote: > > Hello list members, > > We are wanting to test one of our products, which contains a WiFi > interface, in our anechoic chamber. To ensure the WiFi is active we would > need to set up antennae in the anechoic chamber itself - the irony of > introducing radio into a radio-quiet environment is not lost on me. > > I'm concerned about separating out the emissions from the WiFi access > point and the emissions of the equipment under test. Does anyone have any > practical pointers / hints / tips / experience / pitfalls of doing this? > > Thanks in advance > James > > James Pawson > Leading Hardware Engineer - EMC > *EchoStar Europe* > > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to < > [email protected]> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://listserv.ieee.org/request/user-guide.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher <[email protected]> > David Heald <[email protected]> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
