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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Arfa Daily wrote:
I don't know what 'set-ups' this TV has, in terms of brightness, contrast, colour saturation, tint/hue, but in my experience, most LCD TVs - which is, after all, what this is - are set correctly 'out of the box', but I accept that this particular one that I saw might not be a good example of the technology. Based on the assumption that it is a PAL set probably brightness, contrast, and maybe color saturation. Digital TV sets are not PAL per se, but they still use the same luminance, color, sync, signals that are used by PAL (and slightly differently by NTSC). They are also still 25 or 30 frames per second depending upon whether or not thay are interlaced as in 1080i or not. An interlaced frame is still 2 fields, at 50 or (almost 60Hz) combined. The main differences between a digital TV signal and an analog one are that since each frame is discrete, there really is no need for a syncronization pulse to define the begining of each frame and more importantly, there is no color subcarrier. If you were to look at a digital TV signal decoded as if it were a stream of pixels, you would see something that looked a lot like an analog TV signal. Computer displays, BTW are red-green-blue with seperate horizontal and vertical sync, which is very different. Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM |
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