Phil Leigh;349730 Wrote: > Nick, > I have the scope, a good sig gen, a bench PSU and a very nice Fluke > multimeter and an SPL meter - that's it! > > I'll have to think about your LP filter idea. I don't have one - or a > spectrum analyser or distortion meter. > I'll try higher freq sine waves tomorrow. > Cheers > Phil
I don't think sine waves are going to show much - it's really hard to see the difference between the top and middle trace in my plot, even though there's quite significant distortion there (enough to be easily audible). I would try different frequencies and amplitudes of square waves. If they always have the same rough shape regardless of frequency, it's harmonic distortion. If the distortion gets worse at high levels and better at low, that tells you something about how non-linear it is with amplitude. It might also be worth trying a square wave and/or sampling frequency that's an integer multiple of the re-sampling frequency of the TACT. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=53345 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
