Most of the Digital Broadecast Tv stations/channels are Very Weak Signal Strength.
A Simple reception situation that requires a Big antenna installed above the roof in such a manner that the roof and building are not , obstructing , impeding , blocking , reception in the directions of , North West , North , North East.
Install a Winegard Hd7084P All channel antenna aimed at about 340 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antenna.
_________________
Install a Winegard , LNA-100 'Boost' amplifier.
_________________
For 1 Tv connected use No splitter.
For 2 Tv's connected use a simple common 2 way splitter.
For 3 Tv's connected use a simple common 3 way splitter.
_________________
Here are csome places to buy antennas and etc. .
http://www.solidsignal.com.
http://www.amazon.com.
http://www.winegarddirect.com.
http://www.ronard.com.
_________________
Here are some above the roof antenna mounts.
http://www.ronard.com/909911.html.
Use the , ronard(911) , 5 foot tripod antenna mount.
http://www.ronard.com/34424560.html.
Use the , ronard(4560) , eave antenna mount.
http://www.ronard.com/ychim.html.
Measure around the chimney and use a , ronard(2212) , ronard(2218) , ronard(2224).
Buy the ronard antenna mounts at ,
http://www.solidsignal.com , by typing , ronard (x) , in the solidsignal search box or buy from
http://www.ronard.com.
______________________
As always , trees and tree leaves , plants and plant leaves , have a Negative effect on OTA=Over The Air , Broadcast Tv Reception , and so do buildings and other obstructions including your own roof and building.
The Best Practice is to install the HD7084P antenna at a locatuion that has the least amount to no amount of obstructions of any type or kind in the directions of reception.
_____________
Digital Tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
Do Double Rescan ,
http://www.wchstv.com?doubleReScanAlert.pdf.
Some digital tuners will Automatic channel scan for cable tv channels.
DO NOT channel sacan for cable tv channels.
Go into the Tv Setup Menu and select 'Air Channels' ~ 'Antenna Channels'.
Scan for Digital channels.