Your cable system is probably QAM (digital cable). The tuners built into the TV are analog and digital OTA tuners (ATSC and NTSC). If you connect the Cablevision box to the component video input (and connect the audio out of the box to the appropriate audio in) on the TV and an appropriate antenna to the coax (antenna) input, you will be able to swap use the tuners in the TV. (See tvfool.com for antenna types and direction or antennaweb.org for directions of the most likely stations to be received at your location. antennaweb assumes an external antenna and is conservative in the list it provides.)

I hope this helps.

Cindy Wells
(please note, you probably need to get the component video cables. These have 3 RCA plugs on each end (red, green and blue). To carry the audio you need a cable with 2 RCA plugs on each end (red and white). Match the colors as you connect them.)