It is "common " when running a "Cable" line parallel to an AC line to use this "mode" -use sheilded cable. The sheilding in the cable helps to protect it from any magnetic fields.
Other than that........nope :-)
Yep, I know what it is. It applies only to balanced circuits, not coax. Coax is single ended, so common mode doesn't apply. Also, all balanced circuits reject common mode signals only up to a given point. Too high a common mode signal will disrupt balanced communications signals.
Bill Gill
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