Someone recently gave me a ptz camera. Its a Speco CVC5945DNVW , please visit the link, http://www.electronicdiscountsales.com/shop/product.php?id=1338403198&product=New+Speco+CVC5945DNVW+Dome%2FTurret+Vandal+Resist+Camera+600+Lines+Day%2FNight+Color. So my problem is that I can't find a way to power the camera up, as you can see in the picture provided in the website link, it only has 2 connections. the Bnc connection and the other which I think is the rs485 signal cable or it could be the power cable idk. I have installed 3 regular caeras which have the power cable and the bnc, i just need help on how to power and wire this to my dvr. Any help is appreciated thank you in advance.