<p>Cox Cable made changes to the local HDTV channel frequencies at midnight that will affect cable viewers without a cable box.</p><p>Cable viewers without a cable box will have to do a rescan to get the local channels on their HDTV starting Wednesday morning. Cox will be finished with the changes around 4 a.m.</p><p>Many subscribers have several television sets in their homes with only one on a cable box and the rest attached directly to cable. They will lose all of the local channels and need to rescan to get them back.</p><p>Rescan Instructions for most HDTVs:</p><p><a href="http://www.wafb.com/story/23515007/cox-cable-changes-to-hdtv-channels-set-to-take-effect">Keep reading...</a></p>