My first post. First off thanks to Dave for all of the great EEVBlog videos especially the teardown videos.
This post is mainly for the benefit of users interested in audio frequency analog signals. I would like to share some of my findings with respect to this scope as I was unable to find much on this topic after searching this forum and Youtube videos. I wound up going with the 1102G 70Mhz model over the entry level Rigol and Siglent models because of it's built in WaveGen option and Bode plot analysis and based on Dave's comments on the poor FFT performance of the cheaper Rigol models. I took a chance and payed a whole lot more for this model over the Rigol betting that the FFT would be acceptable for my needs. As it turns out "Bob's your uncle", it is.
The attached photos depict a guitar overdrive/distortion effects pedal hooked up with a 1Khz signal. The pedal is set on a low level of overdrive to give assymetrical clipping, followed by a slightly higher setting of overdrive to start the onset of symmetrical clipping. The FFT analysis clearly shows the harmonics at both even and odd multiples of the fundamental freq. The bode plot shows both the amplitude and phase response with a sweep over the entire audio range. With carefull manipulation of the overdrive control I was able to clearly see how the odd order harmonics started to dominate the even order ones as the signal clipping became more symmetrical.
As well with manipultion of the two cursors, the absolute and relative magnitudes of the frequency components can be read off of the FFT plot.
For anyone interested in analog audio signal processing this scope is a very powerful tool.
Cheers
Steve