NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Legislated Emergency Locating Transmitters and Emergency Position Indicating Radio BeaconsAn emergency locating transmitting (ELT) system comprising a legislated ELT modified with an interface unit and connected by a multiwire cable to a remote control monitor (RCM), typically located at the pilot position. The RCM can remotely (1) test the ELT by disabling the legislated swept tone and allowing transmission of a single tone, (2) turn the ELT "on" for the legislated ELT transmission, and (3) reset the ELT to an "armed" condition. The RCM also provides visual and audio indications for transmitter operating condition as well as ELT battery condition. Removing the RCM or shorting or opening the interface input connections will not affect traditional ELT operation.
Document ID
19890005003
Acquisition Source
Goddard Space Flight Center
Document Type
Other - Patent
External Source(s)
GSC-12892-1
Authors
William R Wade
(Goddard Space Flight Center Greenbelt, United States)
Date Acquired
August 14, 2013
Publication Date
October 11, 1988
Publication Information
Publisher: United States Patent and Trademark Office
Subject Category
Communications And Radar
Accession Number
89N14374
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,777,656
Patent Application
US-PATENT-APPL-SN-655606
No Preview Available