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.
- 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.
- 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.
- Linear tape speed determines the sound-channel frequency response where longitudinal tracks are used—the higher the ...
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