Mosaic
Well-Known Member
Hi all:
I am familiarizing my self with profiling an audio spectrum to help identify audio feedback issues discussed in another thread.
Here is a pic of a 4Khz sig. from a function gen with the MATH (purple) dBV FFT waveform @ 2.5Khz per grid. I note the largest peak is the 4Khz sig, but there are a lot of other 'harmonics' going on down the line.
Can anyone explain how it is an AC coupled, function gen signal (50 Ohm terminated) into the Rigol CH2 input is showing up all these harmonics? Thx.
I am familiarizing my self with profiling an audio spectrum to help identify audio feedback issues discussed in another thread.
Here is a pic of a 4Khz sig. from a function gen with the MATH (purple) dBV FFT waveform @ 2.5Khz per grid. I note the largest peak is the 4Khz sig, but there are a lot of other 'harmonics' going on down the line.
Can anyone explain how it is an AC coupled, function gen signal (50 Ohm terminated) into the Rigol CH2 input is showing up all these harmonics? Thx.