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Consumer Electronics by S. P. Bali

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VIDEO TAPE FORMAT PARAMETERS

Table 33.3 gives a comparison of the main physical features of each format in current use. In comparing the data, the following general points should be borne in mind.

  1. Narrow video tracks give high recording density on tape but an inferior noise performance; at track widths below 25 microns good tracking is difficult to achieve with a Dynamic Track Following (DTF) or Automatic Track Finder (ATF) system.
  2. Head drum diameter is directly related to video-track writing speed; the larger the drum (for a given wrap angle, i.e. 180 degree) the greater the writing speed and the wider the frequency response.
  3. Linear tape speed determines the sound-channel frequency response where longitudinal tracks are used—the higher the ...

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