Method and apparatus for automatically optimizing the record cur

Details Method and apparatus for automatically optimizing the record cur Method and apparatus for automatically optimizing the record cur

1990-03-30

1991-12-31

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 65, G11B 2736

Patent

active

050776231

ABSTRACT:
A record current optimization technique includes a magnetic reference tape pre-recorded with a selected frequency at a precisely known level into the tape. A magnetic tape recorder is loaded with the reference tape, and a reference playback level is recovered from the reference tape with a playback head, and is stored or otherwise noted. A recording at the selected frequency then is made with a record head on an unrecorded portion of the reference tape. The new recording is simultaneously read out with the playback head and record current automatically or manually is adjusted until the new playback level matches the reference playback level. A value corresponding to this optimized record current is stored. The record head thus is optimized for any subsequent recording process, by selecting the stored value corresponding to this value. The optimization technique may be employed to optimize record currents in audio, video and data, analog or digital, recorders.

REFERENCES:
patent: 4872071 (1989-10-01), Easton et al.

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