It is important to note that if your tv does not have a digital tuner AND you do not have cable or satellite, you will need to buy a converter box if you want to still watch that tv after the switch over next February. Vouchers are available for a $40 credit toward the price of the converter. Every person is entitled to two vouchers. The only catch is that you have to use them within 90 days of the date you get one. Almost all the boxes I have looked at sell for about $50, so you can get two boxes for $20.
Here is a website with official information about the coupon program:
NTIA: Digital TV Transition and Public Safety
coupon elgible coverter boxes
https://www.ntiadtv.gov/cecb_list.cfm
https://www.dtv2009.gov/Boxes.aspx
Another very good site that explains everything about DTV in terms you can understand, along with many examples is here:
My Free HDTV
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DTV Transition, info
Linear Mode
