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:

1976-06-01

Pagination or Media Count:

7.0

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