Perhaps I should talk about over-reliance or exclusive reliance. There are too many test personnel who, relying on software and firmware, do not understand what the tests they perform need or do, or more than how to push buttons and press keys.
Of course, I also use spectrum analyzers and receivers that do not identify overload and I consider the built-in warnings of newer equipment a convenience which should not be ignored. Even so, if a tester doesn't know what a warning implies, we end up with mistakes; back end overload and front end overload (one receiver's warnings) call for different responses. Didn't t we just have another discussion about false outages caused by transient limiter clipping of out-of-band signals? Don't get me started on my car's Check Engine light. Regards, Cortland Richmond KA5S cortland.richm...@ge.com Opinions not those of my employer > [Original Message] > From: Gert Gremmen <g.grem...@cetest.nl> > To: <k...@earthlink.net> > Cc: <emc-p...@ieee.org> > Date: 12/5/2008 2:59:15 AM > Subject: RE: EMI Receiver > > OK, but do you think the overload feature is less > reliable implemented than the actual read-out of a peak value? > Did the manufacturer do a lousy job ? > We use an instrument to rely on its features, so do we on > the overload feature. > It often does the job better than its operating engineer. > > > > My R&S receiver has a two stage warning system: if > the readout approaches the end of the linear region (and above) it > gives an over-range message, making clear that improved accuracy and > reliability can be obtained by adjusting the attenuator. > (same for under-range) > If you grossly exaggerate the input signal, a overload warning > is also given. > > Maybe the differences between spectrum analyzers and > measuring receivers have to be found in this area > instead in functional (cispr16) specs, where tend to similar. > > > Regards, > > Ing. Gert Gremmen - 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 <emc-p...@ieee.org> 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 <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
