Transponder - A satellite channel. There is often one program per transponder. Some transponders are wider than 6 MHz and can carry more than one NTSC program. Several digital channels can fit on one transponder.
Auto Exposure Control - Automatically senses the ambient light intensity and adjusts the aperture and shutter speed for optimum exposure or turns the flash on if required. To take a good picture, the camera must allow precisely the correct amount of light to hit the film. This quantity of light can be controlled by making the opening at the lens wider or narrower or by controlling the amount of time that the shutter remains open to allow light to pass through. Inexpensive cameras may have no adjustments at all. Many cameras control the size of the lens opening, called the diaphragm or iris. They provide a wide opening for low sensitivity films, or low light conditions, and small openings for high sensitivity films or bright light conditions.
DTH - Direct-to-Home satellite delivery. May also be called DBS or Direct broadcast satellite. In Canada, Bell ExpressVu and Star Choice provide DTH services in both HDTV and SDTV.
Wide Screen Mode, 16:9 - Records images in a compressed form for playback on a 16:9 TV to show cinematic wide screen images. Also known as letterbox format.
Fade - Lets you smoothly fade out video and audio for clean scene transitions.
Dot - Dots make up an image in color separations or halftones. Halftone dots will have a fixed density but have variable size (amplitude modulation).
High Speed Shutter - Allows for a sharper picture of a recorded action when played back. Events recorded with a high speed shutter can be paused or played in slow motion with no visual blur. When using a faster shutter speed, more light is required.
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