Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 22,451
I'll bet you an adult beverage that your modern scopes have isolated shields and differential inputs. Haven't you been annoyed when the shield clip falls off and you start getting wonky traces? That's because it is actually the signal return, not just a shield ground.
Of course it is the return signal. At low frequency, about the same as ground, but at high frequency there will be ringing if not connected.
And of course our DUT is often isolated, so ground isn't there as a return.
Here is one with isolated inputs:
R&S®Scope Rider handheld oscilloscope
The handheld oscilloscope R&S®Scope Rider offers lab performance in a rugged, portable design. The perfect oscilloscope for lab & field measurements. Explore now!
www.rohde-schwarz.com
"All inputs are floating and fully isolated in line with CAT IV 600 V, CAT III 1000 V safety rating. See figure regarding isolation rating on page 14."
One thing to look for is insulated knobs on BNC connectors.
Wouldn't want to connect shield to line voltage without that!
I'll leave the LeCroy off that bet since it probably runs Windows as an OS. No telling what they do. I had to use one once and was not impressed with it.
Sure does. Gotta navigate pull-down menus to get anything done. Like finding function "Integral".
I wish the PC/interface was a replaceable single board computer, and the real-time guts weren't something getting Microsoft updates.
But 3-window display was handy to directly display BH curves on the right, time domain waveforms on the left.
Teledyne LeCroy - WaveRunner 8000HD 8 Channel High Definition Oscilloscopes
Teledyne LeCroy is a leading provider of oscilloscopes, protocol analyzers and related test and measurement solutions that enable companies across a wide range of industries to design and test electronic devices of all types.
www.teledynelecroy.com
as for the oscope. here is a link to the manufactures shop.
OK, use DMM to measure continuity between two BNC.
If zero ohms, then I suggest you deposit Gary's schematic in the circular file.
If open or very high impedance, I owe him an adult beverage.