| 1. | Nearly all modern videotape systems use helical scan and cartridges.
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| 2. | Helical scans increase the relative speed of the tape surface over the head.
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| 3. | The heads scanned the tape in a helical scan fashion
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| 4. | VIII, the SCR-720 used a helical scan instead of spiral.
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| 5. | This is referred to as helical scan recording.
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| 6. | This was the first form of helical scan tape used commercially for data storage.
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| 7. | The first helical scan VTR used in broadcast TV stations was the VR-660.
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| 8. | The spiral and helical scan systems produced very different displays from the same basic data.
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| 9. | A VHS helical scan head drum.
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| 10. | The later helical scan methods used a recording drum with its axis of rotation almost vertical.
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