Article View: sci.electronics
Article #11796Re: Spectrum anaylsers
From: Weston R Beal
Date: Mon, 05 Oct 1992 20:14
Date: Mon, 05 Oct 1992 20:14
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-- Most spectrum analyzers work by sweeping a test frequency over the band specified. The test frequency is multiplied with the input signal and the low-pass filtered. If there is a frequency component in the input signal, that is close to the test frequency, the energy is passed. The sweep frequency modulates the horizontal sweep, and the magnitude of energy passed is displayed vertically on the scope. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% %% %% Weston Beal : I have a piece of hard rock %% %% sldf3@sol.ee.usu.edu : candy, but it's not for eating. %% %% sldf3@cc.usu.edu : It's for looking through. %% %% %% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!sun-barr!olivea!sgigate!sgiblab!sdd.hp.com!uakari.primate.wisc.edu!caen!hellgate.utah.edu!cc.usu.edu!pluto.ee.usu.edu!sldf3References:
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Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!sun-barr!olivea!sgigate!sgiblab!sdd.hp.com!uakari.primate.wisc.edu!caen!hellgate.utah.edu!cc.usu.edu!pluto.ee.usu.edu!sldf3 From: sldf3@pluto.ee.usu.edu (Weston R Beal) Newsgroups: sci.electronics Subject: Re: Spectrum anaylsers Message-ID: <1992Oct5.141432.59443@cc.usu.edu> Date: 5 Oct 92 20:14:31 GMT References: <1992Oct4.133239.7918@latcs1.lat.oz.au> Organization: Utah State Univ. EE Lines: 19 Nntp-Posting-Host: pluto.ee.usu.edu