TM-9-2350-277-10 Operator Manual M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-10 OPERATE AN/VAS-5 DRIVERS VISION ENHANCER (DVE)(M58 ONLY) Continued 0035 02 b. Manual LEVEL adjustment — When the vehicle is stationary, in some viewing conditions it may be helpful to adjust the SENSOR LEVEL control. Rotate the SENSOR LEVEL control clockwise out of detent position. Choose a scene within DVEs FIELD OF VIEW (FOV). Adjust the SENSOR LEVEL control until the best image definition is obtained. The optimum level setting varies with the scene and background. This manual operation should only be used when the vehicle is stationary. It may be useful for viewing imagery having very high thermal difference scenes, such as nearby vehicles, factories, or fires. It is also useful for viewing low thermal difference scenes, such as featureless desert terrains or wet fields during or following a rain, where increased LEVEL control (using manual operation) may improve detail resolution. NOTE The SENSOR GAIN control is non functional on the commander’s display. 9. SENSOR GAIN Control — The SENSOR GAIN control is a dual action control. The two functions are automatic and manual and are described below: NOTE The AUTO GAIN mode does not react instantly but requires one or two seconds to compensate. Do not attempt to adjust the image manually. The automatic gain feature will adjust to the best display image faster than it can be adjusted manually. a. AUTO GAIN — The AUTO GAIN position provides the best image for driving conditions. For AUTO GAIN mode, the control must be in the full counterclockwise detent position. In the AUTO position, the sensor video gain is adjusted automatically. In this position, the internal circuitry examines the INFERRED video scene, determines the hottest and coldest extremes, and adjusts the video gain accordingly. The AUTO GAIN mode should normally be used while driving the vehicle. b. Manual GAIN adjustment — When the vehicle is stationary, in some viewing conditions it may be helpful to adjust the SENSOR GAIN control. Rotate the SENSOR GAIN control clockwise out of detent position. Choose a scene within DVEs FIELD OF VIEW (FOV). Adjust the SENSOR GAIN control until objects and background features range from near black to near white. At some settings it may be helpful to also make a slight readjustment of the SENSOR LEVEL control. The optimum gain setting varies with the scene and background. The manual operation should be used only when the vehicle is stationary. It may be useful for viewing imagery having very high thermal difference scenes, such as nearby vehicles, factories, or fires. It is also useful for viewing low thermal difference scenes, such as featureless desert terrains or wet fields during or after a rain, where increased gain (using manual operation) may enhance detail resolution. 0035 02-5 Change 1