Several documents describe aspects of the continuing development of a multichannel, dual-mixer system for simultaneous characterization of the instabilities of multiple precise, low noise oscillators.
One of the documents presents the basic principles and design concept that were summarized in "Oscillator-Stability Analyzer Based on a Time-Tag Counter" (NPO-20749), NASA Tech Briefs, Vol. 25, No. 5 (May 2001), page 48. To recapitulate: One of the oscillators would be deemed to be a reference oscillator, its frequency would be offset by an amount (100 Hz) much greater than the desired data rate, and each of the other oscillators would be compared with the frequency-offset signal by operation of a combination of hardware and software. A high-rate time-tag counter would collect zero crossing times of the ≈100-Hz beat notes. The system would effect a combination of interpolation and averaging to process the time tags into low-rate phase residuals at the desired grid times. Circuitry that has been developed since the cited prior article includes an eight channel timer board to replace an obsolete commercial time-tag counter, plus a custom offset generator, cleanup loop, distribution amplifier, zero-crossing detector, and frequency divider.
This work was done by Albert Kirk, Steven Cole, Gary Stevens, Blake Tucker, and Charles Greenhall of Caltech for NASA's Jet Propulsion Laboratory. For further information, access the Technical Support Package (TSP) free on-line at www.techbriefs.com/tsp under the Electronics/Computers category.
NPO-40468
This Brief includes a Technical Support Package (TSP).
Progress on a Multichannel, Dual-Mixer Stability Analyzer
(reference NPO-40468) is currently available for download from the TSP library.
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Overview
The document is a Technical Support Package for the "Progress on a Multichannel, Dual-Mixer Stability Analyzer," referenced as NPO-40468 from NASA Tech Briefs. It is part of NASA's Commercial Technology Program, which aims to disseminate aerospace-related developments that have broader technological, scientific, or commercial applications.
The document outlines the capabilities and functionalities of the multichannel, dual-mixer stability analyzer, which is designed to enhance the analysis of various signals in aerospace applications. It emphasizes the importance of accurate data collection and analysis in ensuring the stability and reliability of aerospace systems.
Key features of the analyzer include its ability to handle multiple input channels simultaneously, allowing for comprehensive monitoring and analysis of different signals. This capability is crucial for applications where multiple parameters need to be assessed in real-time, such as in spacecraft systems or complex aerospace experiments.
The document also discusses the technical specifications of the analyzer, including its operational parameters, performance metrics, and the types of signals it can process. It highlights the significance of maintaining high accuracy and precision in measurements, which is essential for the successful operation of aerospace missions.
Additionally, the document provides insights into the operational environment of the analyzer, detailing how it can be integrated into existing systems and workflows. It addresses potential challenges in data acquisition and processing, offering solutions to ensure seamless operation.
Furthermore, the Technical Support Package includes information on the support and resources available from NASA's Scientific and Technical Information (STI) Program Office. This includes access to additional publications and technical assistance for users interested in implementing the technology.
The document concludes with a disclaimer regarding the use of the information provided, clarifying that neither the United States Government nor any representatives assume liability for its application. It emphasizes that any trade names or manufacturers' names mentioned are for identification purposes only and do not imply official endorsement by NASA.
Overall, this Technical Support Package serves as a comprehensive resource for understanding the capabilities and applications of the Multichannel, Dual-Mixer Stability Analyzer, highlighting its significance in advancing aerospace technology and ensuring mission success.
