DocumentCode
1239111
Title
Jumbogroup Frequency Supply
Author
Barry, John F. ; Narayanan, Sundaram
Author_Institution
Western Electric Company, North Andover, Mass., USA
Volume
22
Issue
2
fYear
1974
fDate
2/1/1974 12:00:00 AM
Firstpage
239
Lastpage
242
Abstract
The jumbogroup frequency supply provides the jumbogroup multiplex terminals with signals having the frequency accuracy 
required for frequency multiplexing 10 800 message channels. In addition to frequency precision, reliability is of utmost importance since many jumbogroup multiplex terminals are to be supplied by one jumbogroup frequency supply. Protection switching of redundant circuits and close monitoring of circuit conditions have been included in the design. Another major aspect of reliable operation is the man-machine interface, which has been engineered to minimize man-made service interruptions.
required for frequency multiplexing 10 800 message channels. In addition to frequency precision, reliability is of utmost importance since many jumbogroup multiplex terminals are to be supplied by one jumbogroup frequency supply. Protection switching of redundant circuits and close monitoring of circuit conditions have been included in the design. Another major aspect of reliable operation is the man-machine interface, which has been engineered to minimize man-made service interruptions.Keywords
FDM systems; Telephone systems; Band pass filters; Circuits; Condition monitoring; Feeds; Frequency control; Frequency division multiplexing; Man machine systems; Oscillators; Protection switching; Switches;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1974.1092157
Filename
1092157
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