This is generally accepted and occasionally enforced, but it contains the lethal corollary that one may be responsible for emissions beyond one's control. EUT-caused emissions may indeed escape from a peripheral, or vice versa, but IMO that can be forestalled by cable conducted emission limits. There is otherwise no reason why a quiet host, obsolete or not, should alter the validity of measurements on connected equipment.
Note that DO-160 and MIL-STD-461 require EUT-off ambients well below the limits. It is not out of bounds to select as hosts or support equipment items which, if they must be in a chamber, do not hide emissions from (or collapse of susceptibility before) the equipment we are testing. No one does a hearing test in a bass drum. Cortland Richmond GE Aviation (Opinions not those of my employer) > [Original Message] > From: Dennis Ward <[email protected]> > Subject: RE: "Quiet" Laptop > > Lab Queens are not to be used for compliance purposes. > > Dennis Ward > Director of Engineering > American TCB > Certification Resource for the Wireless Industry www.atcb.com > 703-847-4700 fax 703-847-6888 > direct - 703-880-4841 > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of John > Woodgate > Subject: Re: "Quiet" Laptop > > In message > <[email protected]>, dated > Tue, 14 Apr 2009, Elliott Mac-FME001 <[email protected]> writes: > > >I have been asked by an associate if I can get a recommendation on a > >model of laptop that would be sufficient for FCC Part 15 DoC tests of > >peripherals that has a reputation for being "quiet". > > I note that this is for FCC purposes, but fundamentally, it's not an > acceptable situation world-wide. Using products that are no longer in > production is just not realistic. If it were, someone would use a - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
