National Academy of Engineering. ... Since this proposal implies the introduction of technically sophisticated equipment as the state of the art advances, the question may be asked, ... The principle is well established in frequency- management practice that radio equipment has a finite obsolescence period for three reasons:anbsp;...
|Title||:||Reports on selected topics in telecommunications|
|Author||:||National Academy of Engineering. Committee on Telecommunications|
|Publisher||:||National Academies - 1969|