Coherent Frequency Reference Generation in the NASA Deep Space Network

B. Tucker, J. Lauf, J. Gonzalez, R. Hamell, W. Diener, and R. L. Tjoelker

Abstract:	JPL is nearing completion of a new frequency reference generation and distribution system to replace the DSN FTS Coherent Reference Generator (CRG). The existing CRG selects the online frequency standard, synthesizes standard reference frequencies, and provides fan-out to distribute to users which may be up to 30 km away. Like the existing CRG that is critical to DSN operation, the replacement system must be extremely reliable and preserve the high stability and low phase noise performance of the central frequency standard. In addition, in the replacement system the process and effect of switching to other backup or specialized frequency standards should also be transparent to DSN Operations. Reliability shortcomings of the old system are addressed by upgrading to modern and modular system components, reducing the number of distributed frequencies, and adding redundancy or managing single points of failure.
Published in:	Proceedings of the 40th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 4, 2008 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	3 - 16
Cite this article:	Tucker, B., Lauf, J., Gonzalez, J., Hamell, R., Diener, W., Tjoelker, R. L., "Coherent Frequency Reference Generation in the NASA Deep Space Network," Proceedings of the 40th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, December 2008, pp. 3-16.
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