Updated: Feb 28, 2020
A fast-square wave signal appears to have a 10%–90% rise time of 1 ns when displayed on my oscilloscope. What is the approximate bandwidth of the oscilloscope?
Using the above formula, the scope appears to have a system bandwidth (including the probes) of:
0.35 / (10–9 s) = 0.35 x 109 Hz = 350 MHz