Accession Number : ADA306540

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

Corporate Author : NATIONAL BUREAU OF STANDARDS BOULDER CO TIME AND FREQUENCY DIV

Personal Author(s) : Stein, S. R. ; Walls, F. L.

PDF Url : ADA306540

Report Date : 1978

Pagination or Media Count : 7

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.

Descriptors :   *RADIO NAVIGATION, *FREQUENCY STANDARDS, OSCILLATORS, STABILITY, THEORY, COSTS, USER NEEDS, PHASE LOCKED SYSTEMS.

Subject Categories : Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE