By Topic

Transistorized 2¿¿24 channel carrier telegraph equipment

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
K. Takahashi ; Nippon Telegraph and Telephone Public Corporation, Tokyo, Japan ; T. Kishigami ; T. Matsuzaki ; K. Sakurai

The transistorized 2¿¿24-channel carrier telegraph equipment consists of two FM (frequency modulation) type 24-channel systems in a bay, as recommended by the CCITT (International Telegraph and Telephone Consultative Committee). Taking account of the major weakness of the transistor circuit and of the center frequency variation of the FM system caused by temperature rise, the various parts and circuits have been specially designed, including, for example, the use of afc (automatic frequency control), electronic relay, and special circuits for the oscillator and discriminator. This paper describes these features and characteristics.

Published in:

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics  (Volume:82 ,  Issue: 2 )