|[[File:Polarity diagram.png|link=http://wiki.veye.cc/index.php/File:Polarity%20diagram.png|center|thumb|100x100px|POC signal]] | |[[File:Polarity diagram.png|link=http://wiki.veye.cc/index.php/File:Polarity%20diagram.png|center|thumb|100x100px|POC signal]] |