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Graticule error?

Question asked by ScopeDope on Apr 6, 2020
Latest reply on Apr 8, 2020 by ScopeDope

I've recently purchased a fast rise time pulse generator for future use on a TDR application. The generator is spec'd to produce a pulse with a rise time of ~40ps, albeit with sufficient scope bandwidth on hand. I'm using a MSOX2024A for my measurements here.

 

My scope shows a rise time measurement of 1.47ns while the vertical major divisions are set at 2ns/div. The viewed rise time looks more closely to ~1.75ns as compared to the measured value. It is not really a big deal I'm just curious why the two rise time values don't align more closely. Perhaps I'm just nit-picking or I've been cooped up too long with this shelter in place virus thing.

 

Any comments appreciated.

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