Basically your OTA is the local stations available in your area .
I suspect your TV has a digital tuner but if it doesn't the converter boxes work.
My computer room TV is a CRT with an analog tuner & converter box. It works with just a set of old rabbit ears. The converter box is an RCA .It is better than the Artec or Dish (TR40) I also tried.
For my main TV a 46" Sharp Aquos which has a digital tuner .As do the Magnavox DVR s I have connected to it. So it can receive OTA from either.
I do have a good amplified indoor antenna connected to it.
I recommend this model:
It works well for me anyway . The local channels that come in on the Dish satellite receiver are SD. The OTA are HD so I usually receive them OTA.
I have Dish satellite instead of Direct over all I'm satisfied with it.
Right now it is $44.21 total per month.
I don't have their internet but I believe bundled it would be $50.00 extra per month.