Apparatus for magnetic tape head alignment

Details Apparatus for magnetic tape head alignment Apparatus for magnetic tape head alignment

1976-09-01

1977-12-06

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Electronically correcting phasing errors between related...

G11B 502

Patent

active

040620476

ABSTRACT:
A test set is disclosed for measuring read/write head skew in a magnetic tape recording system. Read head skew is measured by reading a reference tape having substantially identical alternating signals recorded in all tracks thereof and measuring the time between the receipt of signal peaks of corresponding portions of the signals read from any two tracks of the reference tape. Pulses from a high frequency oscillator are counted during the time between the signal peaks to obtain counts which are representative of the read head skew. These counts are averaged over a number of cycles of the alternating signals and displayed on a digital display. Write head skew is measured by writing an alternating signal onto two tracks of a magnetic tape and reading the two tracks with a properly aligned read head. Maximum head skew is determined and displayed by comparing the contents of a display register to the present count and transferring the present count into the display register if the present count is greater or equal to the contents of the display register.

REFERENCES:
patent: 3414816 (1968-12-01), Tobey et al.
patent: 3812531 (1974-05-01), Hall
patent: 3845500 (1974-10-01), Hart
patent: 3877069 (1975-04-01), Altonji et al.
patent: 3900888 (1975-08-01), Uchikoshi et al.

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