I recently purchased a new DTV. All my others are still analog w/boxes. My DTV picks up channels my converter boxes do not. Why is this. They are all hooked up to the same antenna. I have re-scanned the boxes but they will not pick them up. Example: my box picks up 5.1 and 5.2 but my DTV picks up 5.1, 5.3, 5.4 and 5.45. these are all different "networks/channels". they are not duplicates broadcast on other subchannels. Can anyone tell me why this is and if there is a fix?