Ripple Calculation with a Hantek Oscilliscope

[ACharnley]

I've a couple buck/boosts that I need to inspect the ripple on. Voltage is 5V max. The oscilloscope I have is a Hantek DSO5102P.

With channel 1 at ground and 2v the ripple isn't measuring well.

I bump the accuracy to 100mA and there's a relay click, and the ripple becomes more accurate.

However now I can only measure about -/+ 400mV before it disappears off the screen.

I figure it doesn't have the resolution?

 

[ACharnley]

Now I know what AC Coupling is for!

 

[JimB]

Sounds like you had an "Oooo, I never thought of that!" moment.

JimB

 

[ACharnley]

Yep, one of those bloody marvelous moments!