Method and apparatus detecting and setting optimum tape recordin

Details Method and apparatus detecting and setting optimum tape recordin Method and apparatus detecting and setting optimum tape recordin

1979-11-21

1982-08-10

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 31, G11B 547, G11B 2736

Patent

active

043440940

ABSTRACT:
A method and an apparatus for detecting and automatically setting optimum recording bias in a tape recorder in which first and second test signals of low and high audio frequencies, respectively, are alternately recorded on a recording medium. While these are being recorded, the recording bias applied to the recording medium is varied in a plurality of steps between upper and lower limits. The tape is then rewound and the reproduced first and second signals are compared to determine at which recording bias step the reproduced levels of the first and second signals are equal to one another. The recording bias for normal recording is then set in accordance with the bias level present at the selected step.

REFERENCES:
patent: 2791640 (1957-05-01), Wolfe
patent: 4011585 (1977-03-01), Sunaga
patent: 4092678 (1978-05-01), Nishikawa
Published Int. Application WO 79/00715, 10/79.

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