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Do I Have to Have Cable or Satellite? What About an Antenna for Over-The-Air TV?

TVGuardian must sit between the source (a tuner) and your TV to be able to read the closed-captions and intercept the audio before you hear it.  
 
High Definition TV:  You must have HD cable, satellite or IPTV (AT&T U-verse or Verizon FiOS) type service.  The HD TVGuardian needs to be connected between the cable/satellite box and your TV with two HDMI cables.

Standard Definition TV:  You must have a cable, satellite or IPTV box.  A VCR will work with cable instead of a cable box.  TVGuardian will be connected between one of these items and your TV using two composite (Red/White/Yellow) cables.

Over-The-Air TV:   You can use TVGuardian with over the air TV, however, you need an external ATSC tuner or a Tivo DVR.  For standard definition TVs, you will need a DTV converter box.
 

Here are some links to explore.  We have not been able to test the products in the links, but the should work with TVG.

http://www.tivo.com/

http://www.firebird-systems.com/graphics/dct210/digital-tv-tuner-hdmi-dct210.shtml