Accession Number : ADD005025

Title :   Device for Numerically Displaying VOR Bearing.

Descriptive Note : Patent,


Personal Author(s) : Knox,Sidney G

Report Date : 14 Feb 1978

Pagination or Media Count : 9

Abstract : A digital numeric VHF omnidirectional range (VOR) bearing indicator for providing a stable digital readout of VOR bearing in the presence of noise and fading signals. The device utilizes a count averaging scheme for calculating VOR bearing over a plurality of cycles. High quality filtering is also achieved by the use of phase lock loops which are used to generate low noise digital signals having a phase which matches reference and variation signals, representing VOR bearing. An exclusive 'OR' gate is used to compare the reference and variation signals, after they are divided in frequency, to produce a composite signal which has a duration indicative of VOR bearing. The composite signal is then clocked, counted and averaged over a number of intervals and fed to a digital display device. (Author)

Descriptors :   *Patents, *Display systems, *Range finding, *Bearing(Direction), Omnidirectional, Very high frequency, Digital systems

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE