Timeline for What could be the reason for 50Hz noise with isolated input signals?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 13, 2015 at 2:39 | vote | accept | user16307 | ||
| Nov 11, 2015 at 23:55 | comment | added | user16307 | how can I eliminates if I cannot make the cables shorter? what if I connect the GND part of the BNC cables to earth ground? I was thinking if the in RSE configuration GND was already connected to the earth through the PC. | |
| Nov 11, 2015 at 23:51 | comment | added | Thagomizer | The isolation is a possible issue, but that wasn't what I was saying. I've had shielded cables pick up resistance because the connectors were dirty or the cable quality was otherwise poor. Even in a well-connected, good cable, if it is very long or extremely close to a source of EMI, some noise pickup can occur. As far as isolation, it might allow the grounds to float at different levels, so that noise can be induced from one cable to the other. I think that you will have to experiment with various permutations and look at the noise for each one. | |
| Nov 10, 2015 at 23:01 | comment | added | user16307 | it is set to RSE. but are you saying that one of the BNC might be picking up the line noise electromagnetically since earth is isolated? | |
| Nov 10, 2015 at 22:58 | history | answered | Thagomizer | CC BY-SA 3.0 |