Method and apparatus for determining the tuned frequency of a di

Details Method and apparatus for determining the tuned frequency of a di Method and apparatus for determining the tuned frequency of a di

1979-05-07

1980-09-09

Robinson, Thomas A.

H04B 346, H04B 160

Patent

active

042219396

ABSTRACT:
An apparatus and method for determining the tuned frequency of a digital repeater (2) solely through the use of external connections. A pulse burst (30) at a preselected transmission frequency, produced by generator circuitry (4), is inserted into repeater (2) to cause the timing circuit of the same to oscillate for a predetermined time interval (25). After burst (30) and during interval (25), a plurality of sequential sampling pulses (26, 27) is fed to repeater (2) and regenerated by same. This format of burst (30) followed by sampling pulses (26, 27) is preferably repeated a number of times. Counter (10) measures the average time interval between the regenerated sampling pulses and determines the tuned frequency.

REFERENCES:
patent: 3062927 (1962-11-01), Hamori
patent: 3678222 (1972-07-01), Boehly
patent: 3760127 (1973-09-01), Camiciottoli et al.
patent: 3764760 (1973-10-01), Marchini
patent: 3870838 (1975-03-01), Corwin et al.
patent: 4001525 (1977-01-01), Edwards
patent: 4022988 (1977-05-01), Lentz et al.
patent: 4112263 (1978-09-01), Lender

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