System for correlating head scan tracking and tape timer transit

Details System for correlating head scan tracking and tape timer transit System for correlating head scan tracking and tape timer transit

1989-04-11

1992-04-07

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 102, 360 142, G11B 5588, G11B 2710

Patent

active

051033550

ABSTRACT:
A scan tracking centering algorithm is not left at a nominal value, but is modified based on a tape timer's position into the field. That is, the scan tracking centering is adjusted forward (i.e., down) if the tape timer indicates the tape position is early in the field, and is adjusted back (i.e., up) if the indicated tape position is late in the field. Thus, the head deflection control decision which determines if the jumps, or doesn't jump, is made dependent upon tape position in the field, as well as on head elevation.

REFERENCES:
patent: 4393416 (1983-07-01), Takeuchi et al.
patent: 4692819 (1987-09-01), Steele
Television Engineering Handbook, McGraw Hill Book Co., 1986, Benson, pp. 15.115-15.122.
Ampex Corporation VPR-3 Video Tape Recorder Operational Manual, 1809594-04, Feb. 1988, pp. 5-15 to 5-25.

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