| 摘要 |
<p>PURPOSE:To facilitate easy tracking control of a rotary head without using any exclusive fixed head by recording a pilot signal as well as an information signal nearly at the center part in the scanning direction of an oblique track and using the pilot signal in a reproducing mode. CONSTITUTION:Rotary heads 1A and 1B have different azimuth angles, and tracks 4A and 4B of these heads are recorded in a double write mode. The gap width between heads 1A and 1B is larger than the track pitch, and therefore the heads 1A and 1B perform scan over the adjacent tracks. The crosstalk effect of the adjacent tracks can be substantially neglected for the information signal having a high record bit rate owing to the azimuth loss since the adjacent tracks have different azimuth angles. While pilot signals P1-P4 are not attenuated so much by the azimuth loss since the frequencies f1-f4 of those pilot signals are set at a low level respectively and can be reproduced even through the adjacent tracks. Then the traverse speed of a tape 2 is varied in accordance with the difference of outputs of both tracks. Thus the control is possible for tracks.</p> |
