DocumentCode
1433212
Title
Modern carrier current test equipment
Author
Brinton, R. L.
Author_Institution
Pacific Gas and Electric Company, San Francisco, Calif.
Volume
69
Issue
2
fYear
1950
Firstpage
135
Lastpage
135
Abstract
DURING the past 20 years the carrier system of the Pacific Gas and Electric Company has advanced from two simple carrier circuits serving a total of seven terminals to the present system consisting of some 45 circuits and nearly 100 terminals. The system includes relay carriers, telemetering, and remote alarm systems. Some installations employ simple amplitude modulation, other installations transmit only one side band, while others employ frequency modulation.
Keywords
Frequency measurement; Frequency modulation; Oscillators; Test equipment; Voltage measurement; Voltmeters;
fLanguage
English
Journal_Title
Electrical Engineering
Publisher
ieee
ISSN
0095-9197
Type
jour
DOI
10.1109/EE.1950.6434146
Filename
6434146
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