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The DVR or Digital TV , Must Channel Scan for , OTA=Over The Air , Digital Broadcast Tv stations/channels.
The , ATSC , aka = also known as , 8VSB , Broadcast Tv Channels.
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Some Digital DVR's with built in tuner will Automatic channel scan for cable tv channels.
Some Digital Tv's will Automatic channel scan for cable tv channels.
DO NOT channel scan for cable tv channels.
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Go into the , DVR Setup Menu and select ~ DTV Channels ~ Antenna Channels ~ Air Channels ~.
Go into the , Digital Tv Setup Menu and select ~ DTV Channels ~ Antenna Channels ~ Air Channels ~.
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Also Do Not channel scan for Analog channels only.
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The signal strength reception is strong at your location.
Recommend Do Not use a amplified antenna.
Recommend Do Not use a add on external antenna system amplifier.
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A Simple Non amplified indoor type antenna should receive Many Digital Broadcast Tv stations/channels.
A Simple Indoor type antenna that has no , so called 'fine tuning' control knob/s , or other fancy gizmos that are designed to separate you from your money.
A Plain and Simple indoor type antenna is the , Terk HDTVi (not HDTVa) indoor antenna.
For Best Reception have the HDTVi antenna in/at a window or patio/balcony door window that faces , East/North , East , South East.
Aim the HDTVi antenna at about , 96 degree magnetic compass direction.
Here is how to aim indoor and outdoor antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim HDTVi antenna.
If a long length of coax is required to connect the HDTVi Antenna to DVR/TV, and the long length so coax runs through the inside of the building to get from the HDTVi antenna to the DVR/TV.
Then So Be It.
Reason is , Reliable Reception is More Important then objecting to coax running through the inside of the building.
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Digital Broadcast DVR Tuners or Digital Broadcast TV Tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
To clear tuner , do Double Rescan.
http://www.wchstv.com/DoubleReScanAlert.pdf.
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To improve reception and reliability.
Install a ,
http://www.antennacraft.net , HBU11 , above the Peak of the Roof in such a manner that the roof and building are not , obstructing , impeding , blocking , reception in the directions of , East North , East , South East , West.
Aim the , HBU11 , antenna at about , 96 degree magnetic compass direction.
Here is how to aim antenna ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antenna.
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No antenna system signal amplifier is required.
For 1 Tv connected use No splitter.
For 2 Tv's connected use a , 2 way splitter.
For 3 Tv's connected use a , 3 way splitter.