Accession Number:

ADA026462

Title:

A Digital Automatic Frequency Control Design

Descriptive Note:

Engineer's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1976-03-01

Pagination or Media Count:

84.0

Abstract:

The paper describes a digital automatic frequency control AFC system designed for use with almost any conventionally-tuned, high-frequency communications equipment. When connected to a high-quality equipment, such as an R-390 receiver, frequency accuracy and stability approaching that of frequency synthesizers can be obtained. The AFC system digitally counts the frequency of all frequency-determining oscillators in the controlled equipment, computes and displays the operating frequency to the nearest Hertz. When the AFC is engaged, any deviation of the computed operating frequency from the desired frequency causes an error correction voltage to be generated. Use of this system requires that the controlled equipment be modified for voltage trimming of the tuning oscillator.

Subject Categories:

  • Electrical and Electronic Equipment
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE