+=>
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0 NM(dB) is the target figure for reliable reception , 30 feet antenna height above level open ground , no obstructions , with a dipole 'tuned' for the channel of reception.
'Tuned' means the length of the metal reception elements resonate at the , channel/frequency , of transmission and reception.
It is better to have some elbow room for signal strength flucuations and non perfect signal paths , of +10 NM(dB) , and stronger signal strengths are better.
However Many locations have reliable reception with , 0 NM(dB) and on down to Minus-10 NM(dB) and a few locations , a little lower -12 to -15 however those low numbers are the exception reception situation.
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Antenna Gain helps bring all numbers up.
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For reception at your location the NM(dB) numbers will be above +10.
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WMPN-DT , WMAU-DT , W45AA-D , are all the same PBS ,
http://wn.wikipedia.org/wiki/Mississ...c_Broadcasting , so no requirement to receive , WMAU-DT channel 15 or W45AA-D channel 45.
WRBJ channel 34 is now TBN Trinity Broadcasting.
http://en.wikipedia.org/wiki/WRBJ-TV.
The CW has moved to , WJTV channel 12 CBS and CW and Antenna Tv.
http://en.wikipedia.org/wiki/WJTV.
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So I recommend install a ,
http://www.antennacraft.net , HBU11 , aimed at about 5 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.
If not interested in reception of TBN then aim the HBU11 at about 348 degree magnetic compass direction.
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Disconnect and Remove All amplifiers.
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Recommend run all New coax outside , RG6 coax with the Compression type connectors on the ends of the coax.
And replace other outside , connectors , couplers , coax ground block , and other etc. .
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Disconnect and Remove the splitter situation you have now.
Recommend test reception with 1 Tv connected , No splitters. No amplifiers.
To Prove reception run a New continues length of coax through a open door or window , direct to 1 Tv.
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(((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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For 2 Tv's connected use a , HFS-2D , Holland Electronics 2 way splitter. No amplifier.
For 3 Tv's connected use a , HFS-3D , Holland Electronics 3 way splitter. No amplifier.
For 4 Tv's connected use a , HFS-4D , Holland Electronics 4 way splitter. No amplifier.
Buy the , HFS-2D , HFS-3D , HFS-4D , Holland Electronics splitters at ,
http://www.solidsignal.com , or ,
http://www.hollandelectronics.com.
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If signal strength becomes a little weak in the system with a splitter , then install a
Winegard , LNA-100 'Boost' , antenna system amplifier Before the splitter.
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Here are some places to buy antennas and etc. .
http://www.antennacraft.net.
http://www.hollandelectronics.com.
http://www.winegarddirect.com.
http://www.solidsignal.com.
http://www.amazon.com.
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I see your next post and Yes a HBU22 antenna will be Ok.