Method and apparatus for testing the accuracy of an electronic c

Details Method and apparatus for testing the accuracy of an electronic c Method and apparatus for testing the accuracy of an electronic c

1976-12-06

1978-03-14

Woodiel, Donald O.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G04B 1700

Patent

active

040784193

ABSTRACT:
An electronic clock, such as a quartz-crystal clock, is tested and may be adjusted by measuring the oscillation frequency of the clock with an active antenna. The oscillation frequency is electrically compared with a reference frequency to determine deviation and provide an output indication. Internal calibration is carried out when the system is not being used for testing.

REFERENCES:
patent: 3946592 (1976-03-01), Ichikawa et al.

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