Accession Number : ADD002904

Title :   Tracking Status Detector for a Digital Delay Lock Loop.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Chen,Chang Chwng ; Holmes,Jack K ; Lewis,James L

Report Date : 01 Jun 1976

Pagination or Media Count : 7

Abstract : An unlocked detector for a digital delay lock loop employs an up-down counter which periodically accumulates the algebraic sum of the quantized positive and negative adjustments made at a preselected rate by the incremental phase modulator. Whenever this sum reaches a specified threshold value corresponding to a particular phase error, an unlocked indication is given. Arrangements using the same principle are disclosed for analog loops.

Descriptors :   *Phase locked systems, *Patents, Detectors, Tracking, Monitors, Phase locked communications, Digital systems, Analog systems

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE