Fifty such channel banks, representing a total of 600 message circuits, are provided for in the Ll system. ... A line amplifier is required about every 8 miles on each 0.375-in. coaxial cable to keep frequencies up to 3 me safely above noise. ... Figure 18-2 shows a schematic diagram of the power-supply equipment involved.
|Title||:||Television Engineering Handbook|
|Author||:||Donald G. Fink|