PaperPlate -- Allow me to introduce you to my friend the Period. --> . <-- use it liberally.
Yes, coaxial cable, like all forms of copper cabling, looses signal over great distances. This is one of the benefits of fiber optics which have a much larger traversiable distance. However, I believe 1000 feet would be close enough even though you may receive a weak signal.
Copper cable has a certain resistance to electrical signaling. Fiber optics, or clear plastic threading, does not resist light as much as copper resists electricity. That makes fiber optic better for data transmission, but obviously does nothing to provide power across a line.
I searched on Google and found several different answers. Most of the measurements were based on ethernet (computer networking) signal strengths over coax and Cat5 cable. That generally is 100 meters or 330 feet. However, television over RG6 coaxial cable should reach 300 meters or 980 feet, and RG59 coaxial cable should get 600 feet. I would assume they've used RG6 in the ground as that is the most robust television cabling available for home delivery. And you're just about a house-lot too far away. You're signal will be crappy at best.
I suggest getting a satalite dish and a digital video recorder. It's better anyway (:
