Record Details

Record 1 of 1
High-Data-Rate Quadrax Cable Microwave Characterization at the NASA Glenn Structural Dynamics Laboratory
NTRS Full-Text: Click to View  [PDF Size: 2.5 MB]
Author and Affiliation:
Theofylaktos, Onoufrios(NASA Glenn Research Center, Cleveland, OH, United States);
Warner, Joseph D.(NASA Glenn Research Center, Cleveland, OH, United States);
Sheehe, Charles J.(NASA Glenn Research Center, Cleveland, OH, United States)
Abstract: An experiment was performed to determine the degradation in the bit-error-rate (BER) in the high-data-rate cables chosen for the Orion Service Module due to extreme launch conditions of vibrations with a magnitude of 60g. The cable type chosen for the Orion Service Module was no. 8 quadrax cable. The increase in electrical noise induced on these no. 8 quadrax cables was measured at the NASA Glenn vibration facility in the Structural Dynamics Laboratory. The intensity of the vibrations was set at 32g, which was the maximum available level at the facility. The cable lengths used during measurements were 1, 4, and 8 m. The noise measurements were done in an analog fashion using a performance network analyzer (PNA) by recording the standard deviation of the transmission scattering parameter S(sub 21) over the frequency range of 100 to 900 MHz. The standard deviation of S(sub 210 was measured before, during, and after the vibration of the cables at the vibration facility. We observed an increase in noise by a factor of 2 to 6. From these measurements we estimated the increase expected in the BER for a cable length of 25 m and concluded that these findings are large enough that the noise increase due to vibration must be taken in to account for the design of the communication system for a BER of 10(exp -8).
Publication Date: Oct 01, 2012
Document ID:
20120015564
(Acquired Nov 09, 2012)
Subject Category: COMMUNICATIONS AND RADAR
Report/Patent Number: NASA/TM-2012-217609, E-18193
Document Type: Technical Report
Contract/Grant/Task Num: WBS 644423.06.32.03.03.03
Financial Sponsor: NASA Glenn Research Center; Cleveland, OH, United States
Organization Source: NASA Glenn Research Center; Cleveland, OH, United States
Description: 30p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ACOUSTIC SCATTERING; BIT ERROR RATE; COAXIAL CABLES; DEGRADATION; DYNAMIC RESPONSE; DYNAMIC STRUCTURAL ANALYSIS; ELECTROMAGNETIC NOISE; FREQUENCY RANGES; MICROWAVES; NETWORK ANALYSIS; NOISE MEASUREMENT; PERFORMANCE TESTS; SERVICE MODULES; STANDARD DEVIATION; VIBRATION
› Back to Top
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed
Find Similar Records
 
NASA Logo, External Link

NASA Official: Gerald Steeman
Sponsored By: NASA Scientific and Technical Information Program
Site Curator: NASA Center for AeroSpace Information (CASI)
Last Modified: April 09, 2013

Privacy Policy & Important Notices Disclaimers, Copyright, Terms of Use Freedom of Information Act USA.gov NASA.gov NASA OCIO Free Adobe PDF Reader Free MS Word Viewer