This paper gives a general description of the TH system, which is a long‐haul system operating in the 5925–6425 mc band. It discusses the considerations governing the major design decisions, which lead to an FM system of eight channels in each direction, six working and two protection. Each channel has a 10‐mc potential baseband width. The paper continues with a discussion of noise considerations, primarily from the viewpoint of telephone transmission. Fluctuation noise and modulation noise are the principal sources, with interference between radio channels a minor factor.

No abstract

No abstract

No abstract