The typical sample rate of the Arduino Uno's ADC is ~10KSa/s. Yes it can be overclocked, but lets just consider the normal situation. I'd like to 'simulate' the levels of a large random signal that the ADC might see on a digital oscilloscope. This way I can see the level on screen that the ADC would return from sampling.
So if I manually set my 'scope to 10kSa/s, will that be the same as the Arduino, other than the bit depth?