If you choose to go ahead with the testing. The deck is on the south side of the house , it looks like you can do the testing up there. And if one or more channels can be received it look like the antenna could be mounted up there. For testing , a tripod antenna mount like this makes a good test stand.
http://www.ronard.com/909911.html. The ronard mount can be bought at solidsignal by typing the word ronard in the solidsignal search box. The antenna and ect. , can be bought at
http://www.solidsignal.com