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
Link To Document :
