wrote:
I got all the probes to display a nice square wave in the 10x
setting.
But with the probes set at 1x the square wave isn't quite square.

You got lots of answers in this 1.5 year old thread, but the group
seems to have missed one explanation that might make sense to you.

Someone posted the bandwidth of two different probes in 1x mode, and
that bandwidth was 6Mhz.

A square wave can be represented as an infinite sum of sine waves, one
sine wave at the base frequency, and every odd harmonic of that base
sine wave up to infinity.

See: https://en.wikipedia.org/wiki/Square...urier_analysis

Your probes, when in 1x mode, are acting as low pass filters, with a
-3db point at the 6Mhz bandwidth of the probe. So for the input square
wave, consisting of an infinite sum of odd harmonics, the 1x probe is
filtering away most of the harmonics above 6Mhz.

When you low pass filter away most of the higher frequency harmonics
that sum to create a square wave, what you have left is a *distorted*
square wave.