I know some things about how to keep RF and ESD out of a circuit... and I'm confused about some others.
I understand from this thread: "Ferrite on audio leads passing near PC?" that for low frequencies it is sometimes advantageous to only connect the shield of a cable at one end. And connect different boxes' grounds in a star formation. But when is it a good idea to connect it at both?
Up to now I'd thought it was always best to connect the shield at BOTH ends unless there were significant ground loops, to get a Faraday cage which keeps out RF and, if the shield is good enough, probably ESD too. Also I'd heard that multiple points of grounding of a PCB helps to avoid ringing.
Perhaps I am getting confused between signals going down a single core coax cable and multicore shielded cable? Or does it just depend on the particular installation, geometry, types of signal, strength of interfering signal?
Thanks in advance for any clarification,