I am installing my first cctv system for my small office.  I purchased this camera for the rear of the building. 
  
http://www.active-vision.com/700-Res-Long-Range-Camera-p/acc-p29n-ehvd.htm 
  
I also purchased a $50 usb dvr to run the camera to my computer.  The video quality is terrible.  Any 
movement pixelates the screen and also frames skip.  I wanted to ask if a better dvr would increase the video quality significantly.   
I was trying to keep the costs down because I'm only using 2 cameras one in the front and one in the back.   
  
Any suggestions to improve video quality would be appreciated.