Looking at the RCA website, it shows the antenna mounted vertically on the side of a house. I suspect that's the optimal way for reception, but you can experiment and see if you get any other interesting results.
I have seen this antenna, used other RCA outdoor and indoor antennas but have not used this one. Please post your reception quality as I would be interested. Do you know if it covers low VHF, as well as high VHF and UHF?
Sorry I couldn't be of more help TickingMind, but your post caught my eye. See below for link to website. Thanks.
http://www.rcaantennas.net/outdoor/?...T800Z#overview