Transmitted Frequency Range for Circuits In Broad-Band Systems
H. A. Affel · Bell System Technical Journal · 1937
IN utilizing the broad frequency ranges which the newer carrier systems can transmit the telephone engineer has a problem of choice in band width per channel to be allotted to speech currents. A sufficient width is vital to faithful speech reproduction; and desire for better telephone service always recommends an increase in band width over past practice. A reasonable balance. however, must obtain between various economic factors; and there must always be considered the retation between a proposed system and the other parts of the telephone plant, and also the trend of the art.