High-Frequency Measurements of Communication Lines
- 1 January 1927
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. XLVI (00963860), 504-513
- https://doi.org/10.1109/t-aiee.1927.5061383
Abstract
This paper describes briefly a testing technique which has been developed for making line measurements at high frequencies in connection with the application of carrier telephone and telegraph systems in the Bell System. The measurement of line attenuation, impedance, and cross-talk up to frequencies as high as 50,000 cycles is described, using a number of specially developed and standardized high-frequency apparatus units. These include an oscillator, a detector-amplifier, an impedance bridge, a thermomilliammeter set, a variable attenuator, a cross-talk set, and a frequency meter. A brief description of the individual units is given, as well as their coordinated use in complete testing circuits.Keywords
This publication has 3 references indexed in Scilit:
- Development and Application of Loading for Telephone CircuitsTransactions of the American Institute of Electrical Engineers, 1926
- The Transmission Unit and Telephone Transmission Reference SystemsTransactions of the American Institute of Electrical Engineers, 1924
- Carrier Current Telephony and TelegraphyTransactions of the American Institute of Electrical Engineers, 1921