Concerning PBS for Tyler Texas area ,
http://en.wikipedia.org/wiki/KERA-TV.
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Many locations around the , USA , Canada , Mexico , have Few or No Receivable OTA=Over The Air Broadcast Tv Transmitters.
All PBS channels are available for free and also other channels are availiable for free via , FTA= Free to Air , Satellite Tv.
FTA is not new , 16 years now.
KU Band , FTA uses a Small Dish and FTA Receiver.
YES FTA is 100% legal.
Here are places to learn more about FTA.
http://www.ftalist.com.
http://www.global-cm.net.
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There is also the Low Cost services of , NetFlix , HULU+ and etc.
The Streaming Internet Box ,
http://www.roku.com , connects to Many internet streaming services and has many features and flexibility of use.