multiple 'gnd' at different potensials in system and you need to be very awake when attaching gnd probes.
@anks8882 жыл бұрын
Spoiler you can if you understand what your doing and take that into consideration
@dorhocyn32 жыл бұрын
I got an oscilloscope a year ago from Amazon prime and still haven’t really figured out what to do with it. But this is helpful and putting me in the right direction…. The power supply, one is using a dedicated power supply the other one is running off ethernet I think or USB
@bald_engineer2 жыл бұрын
Follow the link above to see an explanation. (And while what you said is true, that does not explain the behavior.)
@arpttr5 ай бұрын
I have a DSO and I recently moved into an older home. The receptacles do not have grounds. I am planning to rewire the house, but before then If I install a GFCI will this work for the grounds even though there technically will not be an actual ground? Also, will I be able to test with the DSO while using a bench power supply?
@bald_engineer5 ай бұрын
This is a "no equipment ground" situation. And I am not an electrician. However, if the scope and power supply are plugged into the same outlet, their reference should be the same.
@paulmeynell88667 ай бұрын
I could say you gave me a grounding in this subject😇
@paulmeynell88667 ай бұрын
Nice video
@NeverTalkToCops1 Жыл бұрын
There is a fortune (quite large) to be had by inventing cheap enough NON contact probes!
@JayJay-ki4mi Жыл бұрын
I just watched a video about this on EVblog, but I really couldn't get the gist of what he was saying. I love his videos, but your video was far more clear. Thank you, I probably would a blew my Rigol up if I hadn't watched this.
@jlev505 Жыл бұрын
The one one the left has a isolated power source, possibly powered from a battery pack through a USB so no transformer. The circuit B is powered from a wall transformer and is on the same earth ground as the probes socket or power source.
@mu8502 Жыл бұрын
hi can I use 150 MHz probe on 50MHz oscilloscope?
@thubtumbing4 Жыл бұрын
yes but you will only get a reading for 50mhz
@norbert.kiszka22 күн бұрын
@@thubtumbing4 nope. First of all 50 MHz, instead of 0.05 Hz. Second thing: he still can measure above 50 MHz, but signal will be smaller, because probe (and scope) is a RLC filter.
@garthhowe2972 жыл бұрын
Terrific video. I have always used the ground, not because I was smart, but just because that's the way I was taught. I hadn't given much thought to the alternative. That was a really clear explanation/demonstration... thanks very much!
@GeorgeGraves2 жыл бұрын
Where dit that girl go? She's amazing!
@bobblum59732 жыл бұрын
At an electronics manufacturer I worked at (pre-1984) I seem to recall seeing test point sockets on circuit boards that would accept the small Tektronix scope probe ends, sort of a small coaxial socket. Just by plugging the probe tip into the socket it would allow access to the test signal and provide a very good signal ground and shielding. This was when the smaller Tektronix probes were fairly new, and we also used the much larger ones as well. Something to watch out for on multichannel scopes is probe cable lengths. Trying to determine signal time offsets can be misleading if you don't use probes with the same cable length. The signal propagation delay through different cable lengths will be noticeable, and worse at higher frequencies. (If there's already a video about that on Element14, think of this as a reminder! ☺)
@rickhunter19842 жыл бұрын
one is a ac/dc and has no flux in power level. while the lan port power has a lot of other power flux.
@user-kr9kq3fo4v2 жыл бұрын
I don't have an oscilloscope, I want to have one.
@castlecodersltd2 жыл бұрын
I really enjoyed this explanation. Thank you
@qwaqwa19602 жыл бұрын
One of the nice things I've discovered about good active probes is that grounding is a lot less critical. A clip-wire ground can give as good SI as a spring on a passive. For my most critical probing though, I always use a differential probe.
@Bob-tu9jq2 жыл бұрын
Thank you, James. Fantastic!!!
@rohitchaturvedi22712 жыл бұрын
6:06 circuit a is powered from a USB thus has ground loop completed. Circuit B is powered from an ac/dc adapter with isolated outputs.
@stephensu43712 жыл бұрын
i am thinking the same
@jrkorman2 жыл бұрын
+1 - The wallwart is completely isolated from any earthed path.