Recent content by Stefan Merfu

Would you like to explain me how ground loop works ? From my knowlegde i know that the ground loop is produced when are more paths to ground with different resistances and this two(three) resistances behave like resistor in parallel.But some people advice me to add a series resistor on shield of...

I understood, thank you for help.I am not too good about transformers and stuff like this, i want to know how this galvanic isolation works if i don't have any type of AC signal on cable like DC voltage which supplies the power for device.If you would like to explaine me will be helpful.

Thank you for proper answear. Do i need a shielded twisted pair ?

I will try, i forget about EMI caused by motor.i tried to decouple ground using a 10nF it's ok but the dc bias of composite signal is gone so i have some issues with syncronization of vertical an horizontal.

The robot is powered up by another two conductors which have their own resistance, the idea is that the ground coax is going in the same general ground so i can't break the ground loop because will still exist some resistance in conductor that will compromise my composite signal.I'm thinking...

Hello, i have a really annoiyng problem , i have a robot which is equipped with a video camera(PAL) so nothing too fancy, the information is transmitted through a coaxial cable about 200 m of cables,the attenuation of high frequency is not to big to cause any problems,also the robot has some...