Composite Oscillator Systems For Meeting User Needs For Time and Frequency,

Abstract

Frequency standards are used in most navigation and position location systems to provide a long term memory of either frequency, phase, or time epoch. From a systems point of view, the performance aspects of the frequency standard can be weighed against other systems characteristics, such as overall performance, cost, size, and accessibility. A number of areas of navigation and position location are very briefly reviewed from this point of view, The theory of phase lock and frequency lock systems is outlined in sufficient detail that one can easily predict total oscillator system performance from measurements on the individual components. As an example, details of the performance of a high spectral purity oscillator phased locked to a long term-stable oscillator are given. Results for several systems, including the best system stability that can be obtained from present commercially available 5-MHz sources, is shown.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1978
Accession Number
ADA306540

Entities

People

  • F. L. Walls
  • S. R. Stein

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Bandwidth
  • Clocks
  • Closed Loop Systems
  • Control Systems
  • Crystal Oscillators
  • Detectors
  • Frequency
  • Frequency Bands
  • Frequency Standards
  • Measurement
  • Navigation
  • Position (Location)
  • Signal Generators
  • Spacecraft
  • Standards
  • Time Domain

Readers

  • Control Systems Engineering.
  • Electrical Engineering
  • Hydraulic Engineering.