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Record Details

Record 79 of 10710
Spacecraft signal sources portable test system
Offline Availability: Go to Request Form
Author and Affiliation:
Kirk, Albert(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Kuhnle, Paul(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Sydnor, Richard(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Diener, William(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Stowers, David(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Abstract: There is a frequent need to measure the frequency stability and phase noise levels of very high performance signal sources that are required for certain spacecraft missions. These measurements need to be done at different locations as the spacecraft subsystems progress through the various stages of development, assembly, test, and integration. Allan Deviation and Phase Noise of high performance sources are generally measured by comparing the unit under test to a reference standard. Five basic requirements are associated with making these kind of measurements: (1) the reference standard performance needs to be equal or better than the unit under test; (2) the measurement system needs to accommodate odd, nonstandard measurement frequencies that can range from 4 MHz to 35 GHz; (3) warm-up frequency drift and aging can corrupt a measurement and must be dealt with; (4) test equipment generated noise must be understood and prevented from limiting the measurements; (5) test equipment noise performance must be verifiable in the field as needed. A portable measurement system that was built by JPL and used in the field is described. The methods of addressing the above requirements are outlined and some measurement noise floor values are given. This test set was recently used to measure state of the art crystal oscillator frequency standards on the TOPEX and MARS OBSERVER spacecraft during several stages of acceptance tests.
Publication Date: Jun 01, 1993
Document ID:
19940006528
(Acquired Dec 28, 1995)
Accession Number: 94N11000
Subject Category: COMMUNICATIONS AND RADAR
Document Type: Conference Paper
Publication Information: NASA. Goddard Space Flight Center, The 24th Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting; p 427-438
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: FREQUENCY MEASUREMENT; FREQUENCY STABILITY; FREQUENCY STANDARDS; NOISE INTENSITY; ACCEPTABILITY; CRYSTAL OSCILLATORS; MARS OBSERVER; TOPEX
Imprint And Other Notes: In NASA. Goddard Space Flight Center, The 24th Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting p 427-438 (SEE N94-10963 01-70)
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