NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login

Press Enter or click the Search button to begin your search.

Back to Results
Method of and means for testing a tape record/playback systemA tape record/playback system was tested by first deriving an analog test signal and a band-limited digital reference signal from a pseudo-noise sequence generator driven by a clock signal. It recorded the signals on respective tracks of the system during operation in a record mode. During the playback mode of operation of the system, a delayed analog reference signal without time base variations was reconstructed from the played back reference signal. It was compared with the played back test signal in order to obtain an error signal that was a measure of the performance of the system.
Document ID
19770010482
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Wallace, G. R. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Salter, W. E. (Sperry Rand Corp. Huntsville, Ala., United States)
Weathers, G. D. (Sperry Rand Corp. Huntsville, Ala., United States)
Gussow, S. S. (Sperry Rand Corp. Huntsville, Ala., United States)
Date Acquired
August 8, 2013
Publication Date
January 11, 1977
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: NASA-CASE-MFS-22671-2
Patent Number: US-PATENT-4,003,084
Patent Application Number: US-PATENT-APPL-SN-561956
Patent Application Number: US-PATENT-APPL-SN-419831
Accession Number
77N17426
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-MFS-22671-2|US-PATENT-4,003,084
Patent Application
US-PATENT-APPL-SN-561956|US-PATENT-APPL-SN-419831

Related Records

IDRelationTitleN75-31418Superseded By
No Preview Available