With every EthoVision for Windows system, we supply EasyGrab. With this program you can check if the frame grabber is working properly. It is also quite useful for adjusting your camera's focus and zoom settings without starting EthoVision.
To run EasyGrab, from the Windows Start menu, choose Program Files, Noldus, EthoVision, EasyGrab. From the Command menu, you can get a live video image by choosing Live, and a still image by choosing Grab. EthoVision XT comes with a similar program called eVision Evaluator.