A common misconception among those who are purchasing DTV converter boxes using a coupon is that they'll begin receiving high-definition television signals (usually known as HDTV). Sorry to disappoint, but this isn't exactly the case, so before you indulge in a brand-new high definition set, you might want to read on.
There are two common forms of a digital signal: SDTV and HDTV. Both forms are capable of bringing in a clearer picture than your analog signal, both bring in clearer audio and both are capable of tuning in to those digital subchannels that bring you more content.
The main difference between SDTV and HDTV lies in the clarity of the picture and the amount of audio channels you can receive. Without getting too technical, SDTV is what you get your grandma who wants to keep up on her soap operas--basic digital signal, audio in stereo. Those are the boxes you'll be able to purchase with your $40 government coupons.
But say you want the full package--the ability to watch a football game, surrounded by the sounds of the crowd and the players, and the excitement of spotting dew on the bold, green grass--HDTV is the way to go. There are HDTV tuners you can purchase for your HDTV-ready sets; however, most widescreen sets already come with HDTV tuners built-in. For those of you who, like me, purchased an HDTV-ready set with only an analog tuner, you'll need to invest in a HDTV tuner--they are more expensive and undermanufactured at the moment. Samsung's HDTV Digital Terrestrial Receiver is an example of an HDTV tuner. However, with a pricetag of $179.99 and the inability to use the government coupon vouchers, it may be best to simply invest in a new set, subscribe to cable or satellite, or deal with a cheaper SDTV converter box instead.