Pulse or digital communications – Repeaters – Testing
Patent
1982-05-13
1985-11-26
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375 38, 34082574, 307364, H04L 2706
Patent
active
045557918
ABSTRACT:
The state of an all-or-none modulated useful signal subjected to a perturbed environment is determined, on reception, through the use of non-modulated reference signals subjected to the same environment. The reference signals have respective frequencies neighboring that of the useful signal and the same initial amplitude so that all of the signals are attenuated in the same manner by environmental perturbations. By comparing against a threshold reference value the differences between the respective amplitudes of the received reference signals and the amplitude of the received useful signal, the "all" and "none" states of the useful signal are accurately determined irrespective of the effect of perturbed environment on the amplitude of the useful signal.
REFERENCES:
patent: 1752325 (1930-04-01), Branson
patent: 1886263 (1932-11-01), Ilberg
patent: 2070418 (1937-02-01), Beverage
patent: 2507176 (1950-05-01), Posthumus
patent: 2572074 (1951-10-01), Terry et al.
patent: 2602852 (1952-07-01), Lense et al.
patent: 3413608 (1968-11-01), Benzuly
patent: 3571522 (1971-03-01), Cox
Jeumont-Schneider Corporation
Safourek Benedict V.
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