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Digital communication systemA digital communication system is reported for parallel operation of 16 or more transceiver units with the use of only four interconnecting wires. A remote synchronization circuit produces unit address control words sequentially in data frames of 16 words. Means are provided in each transceiver unit to decode calling signals and to transmit calling and data signals. The transceivers communicate with each other over one data line. The synchronization unit communicates the address control information to the transceiver units over an address line and further provides the timing information over a clock line. A reference voltage level or ground line completes the interconnecting four wire hookup.
Document ID
19740022411
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Monford, L. G., Jr. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 3, 2013
Publication Date
August 6, 1974
Subject Category
Structural Mechanics
Accession Number
74N30524
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,828,137|NASA-CASE-MSC-13912-1
Patent Application
US-PATENT-APPL-SN-310034

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