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Consumer Electronics by S. P. Bali

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AUTOTRACKING

One of the banes of using a VCR is fine-tuning the picture using the tracking control. This control compensates for the inevitable difference between VCRs, even when using the same VCR to playback an older tape. Without this control, snow would often appear on the top or bottom of the screen.

8 mm decks and camcorders incorporate an ingenious automatic tracking system, so there's no need to adjust the tracking control. Tracking controls are common on Beta and VHS decks although a number of the later model VHS units incorporate an autotracking feature. In the VHS autotracking system, electronics in the deck sense when the video signal drops 15 per cent or more during playback. This drop indicates the tracking is off, thereby causing ...

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