difinitron, Inc.

The meter measures the frequencies created by the CCD chip in the camera. The lens captures the image, and as the image becomes shaper and in focus the video output increase, the meter is calibrated to read and convert this signal to an alpha numeric output which is displayed on the meters LCD screen. As the image becomes focused the displayed number gets larger, once you over focus or peak out the number begins to decrease. As for the field of view, if the field of view changes obviously you will have to refocus the lens.

Rory, The VM-417 can be purchased online from: Industrial Covert Unlimited P.O. Box 5449 Traverse City, MI. 49696 231-932-9550 800-886-4572 www.CU1.com Sales@CU1.com If you should have any questions or concerns please do not hesitate to contact me, Thanks Chad

Rory - Collin, I am the New Business Development Consultant for Difinitron. The features of the Difinitron's Video Meter are similar to the others you have referred to. The meter processes composite video signals, then separates and measures the amplitude of various components (Sync, Video Level (1 Vp-p) Luminance and Color Burst) in the video signal, which are displayed in IRE units on an LCD screen. The focus setting reduces installation time by allowing an installer to attach the VM-417 to the camera and adjusting the lens while watching the LED screen. The camera will be in focus as the alpha numeric display peaks. The device is very easy to use and very effective. If you should have any questions please feel free to contact me at 877-489-6358. Depending on where you are located I may be able to set up a demo for you. -Chad