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Yes is Ok to Test Reception the Tv stations/channels , no mater how weak the signal strengths are.
To that end , here are some , antennas , amplifiers , antenna mounts.
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Antenna System #1.
It looks like ,
http://www.warenelectronics.com . Has the Winegard HD5030 , VHF channels 2 thru 6 antenna.
http://www.warenelectronics.com/antennas/HD5030.htm.
install a ,
http://www.antennacraft.net.
10G201 preamplifier.
Aim the the HD5030 antenna at about 349 degree magnetic compass direction.
For reception of ,
WBKP , Real VHF low band channel 5 , ABC and CW.
WBKP is very strong signal strength and will be received through the back angle of the antenna.
CKRP-DT , Real VHF low band channel 2 , CBC.
CHFD-DT , Real VHF low band channel 4 , GTN.
CICO-DT , Real VHF High band channel 9 TVO.
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Antenna system #2.
Antennas Direct , DB8e , current UHF channels 14 thru 51.
http://www.amazon.com.
Install a ,
http://www.kitztech.com.
KT-200-COAX Tv , Antenna Booster , Remote Power-CoaxFed.
Aim the , DB8e antenna at about , 154 degree magnetic compass direction.
To Test for reception of ,
WLUC-TV , Real UHF band channel 35 , NBC and FOX and America One.
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Antenna System #3.
http://www.antennacraft.net.
HBU55 , VHF high band channels 7 thru 13 antenna aimed at about 153 degree magnetic compass direction.
Install a ,
http://www.antennacraft.net.
10G201 preamplifier.
Aim the HBU55 antenna at about , 153 degree magnetic compass direction.
For reception of WNMU-DT , Real VHF high band channel 13.
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Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antennas , do not trust a , cell phone , tablet and etc. compass.
As always , the antenna aim and location can be adjusted for best reception.
Most Digital Tv's have a Signal Strength Meter and some Digital Tv's will also have a Signal Quality Meter.
When the signal strength is strong enough for reliable , then Signal Quality becomes more important then more signal strength.
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The antenna systems are All Separate antenna systems and are not connected together.
Separate Coaxes go to the Tv.
At the Tv location.
Separate Digital Tuner/Tuner Recorders are connected to the Separate antenna systems.
http://www.epvision.com.
Here are some Tall/High antenna mounts.
http://www.ronard.com/712.html
Above the Peak of the Roof install the , ronard(712-50-10) , 10 foot tripod antenna mount.
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Home Depot has , 10 foot 6 inch length , 1 and 3/8 inch diameter , TOP RAIL , chain link fence , PIPE , that makes good antenna mast/pipe , the price is low at about 12 dollars.
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Here are , Free Standing , No Guy wires , Light Weight Aluminum , Lay over Towers.
http://www.palcoelectronics.com/pe300.aspx