Test control circuit for multichannel apparatus such as tape rec

Details Test control circuit for multichannel apparatus such as tape rec Test control circuit for multichannel apparatus such as tape rec

1979-10-31

1982-06-01

Atkinson, Charles E.

Excavating

324 73R, 360 31, 371 25, G01R 3128, G06F 1100

Patent

active

043331777

ABSTRACT:
A test control circuit includes a channel selector circuit and input and output buffers, which cooperate with input/output buses and respective latches of the multichannel apparatus, to allow an operator to select one or more input buses, and one or more output buses, of a respective channel or channels of the multichannel apparatus. Thus the circuit allows selectively applying an input test signal to one or more channels via the front of the apparatus, while selectively monitoring the resulting output signal from the channel or channels also via the front of the apparatus. An exemplary purpose of the test control system is to facilitate the channel alignment and head azimuth adjustment of, for example, a multichannel audio tape recorder.

REFERENCES:
patent: 3519761 (1970-07-01), Trost
patent: 3522532 (1970-08-01), McCoy
patent: 3686682 (1972-08-01), Behr et al.
patent: 3831149 (1974-08-01), Job
patent: 4103338 (1978-07-01), Cizmic et al.
patent: 4180203 (1979-12-01), Masters

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