Sample calculation

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

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