If you use oscilloscope FFT while in enhanced resolution mode that is using boxcar/rectangular window function,will you get distorted reading? Boxcar funcion have perfect time domain behavior,no ringing but it have freqency domain ripple,ERES/Gaussian window have tiny bit of ringing but its freqency response is smooth curve,no ripple.
I wonder,does it matter what type of window funcion is the scope using to get more bits as tradeoff for less samplerate? Is it possible that the ERES/Gaussian is better for FFT than HiRes/Boxcar/Rectangle due to freqency ripple?