Fast search and lock-on means for distance measuring equipment

Details Fast search and lock-on means for distance measuring equipment Fast search and lock-on means for distance measuring equipment

1974-08-01

1976-02-03

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 914, G01S 956

Patent

active

039368238

ABSTRACT:
A fast search system for DME generates range gates at the time an analog sweep voltage rises to the magnitude of an analog integrator waveform, the latter having a slope less than that of the sweep voltage and provided with a constant current source input. The current source is selectively inhibited by digital control means responsive to the relative time occurrence of range gates and reply pulses such that the range gate occurs during an instant interrogation period at a point in time corresponding to a predetermined percentage of the time at which appeared the first received reply pulse in a preceding interrogation period.

REFERENCES:
patent: 3092831 (1963-06-01), Mercer
patent: 3267464 (1966-08-01), Shames
patent: 3456257 (1969-07-01), Aker
patent: 3702475 (1972-11-01), Alden et al.
patent: 3781885 (1973-12-01), Hassencahl
patent: 3787846 (1974-01-01), Bishop

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