Question about using Portable power bank or Laptop

Question about using Portable power bank or Laptop

Postby trentehr1997 » Mon Jan 07, 2019 6:27 pm

When I power my dso 138 mini using a portable power bank or my laptop, when I touch the Pos probe to my finger, no wave is shown. But when I plug it into the wall outlet, it shows the wave when I touch my finger on the red probe. This is what Im referring to -> https://imgur.com/a/JnNmYO6 However, connecting the probe to 1 kHz test signal shows the wave on all 3 power sources. Why is this? Have a feeling it has to do with ground somehow.
trentehr1997
 
Posts: 1
Joined: Sat Dec 29, 2018 3:13 am

Re: Question about using Portable power bank or Laptop

Postby jye1 » Sat Jan 12, 2019 3:03 am

Yes this could be grounding related. Or maybe just because the pick-up was very small. You can increase the sensitivity and see.
jye1
 
Posts: 1220
Joined: Wed Feb 20, 2013 4:58 pm


Return to DSO138mini

Who is online

Users browsing this forum: No registered users and 2 guests