Hello Mike, Simply a simulator where I can define a perdiodic waveform and it calculates the harmonic content of the signal... It4s to evaluate a filter and a PWM signal. Any ideas ? MH> I'm not entirely clear on what it is you're looking for, but here's MH> a page that has a lot of test equipment-like software, mostly MH> using the sound card for input. MH> http://www.dazyweblabs.com/shannonsoft/page3.html MH> Mike H. >>Hello Piclist, >> >> I4m looking for a Spectrum analyzer software (freeware) where I can >>define a periodic >> waveform. >> Is to analyze harmonics in waveforms. >> >> Thanks in advance, >> Gus >> >> >>-- >> Digiled mailto:mail@digiled.com >> >>-- >>http://www.piclist.com hint: The list server can filter out subtopics >>(like ads or off topics) for you. See http://www.piclist.com/#topics -- Best regards, Digiled mailto:mail@digiled.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.