Timing Subsystem Development Network Synchronization Experiments

K.R. Backe

Abstract: In the predominantly digital Defense Communication System (DCS), a requirement exists to coordinate clocks at geographically distinct nodes to handle switched digital traffic and provide a general timing capability. The characteristics of the nodal clocks, link equipment delay/phase relationships, transmission medium, and synchronization technique all affect system performance and must be considered when attempting network-wide clock alignment. This paper describes a program in which several experimental timing subsystem prototypes were designed, fabricated, and field tested using a small network of troposcatter and microwave digital communication links. This equipment was responsible for modem/radio interfacing, time interval measurement, clock adjustment and distribution, synchronization technique, and node-to-node information exchange. Presented are discussions of the design approach, measurement plan, and performance assessment methods. Recommendations are made based on the findings of the test program and an evaluation of the design of both the hardware and software elements of the timing subsystem prototypes.
Published in: Proceedings of the 14th Annual Precise Time and Time Interval Systems and Applications Meeting
November 30 - 3, 1982
NASA Goddard Space Flight Center
Greenbelt, Maryland
Pages: 451 - 477
Cite this article: Backe, K.R., "Timing Subsystem Development Network Synchronization Experiments," Proceedings of the 14th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1982, pp. 451-477.
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