This paper reports the continuing progress achieved during the preceding year in fiber optics transmission systems applicable to CATV requirements.
Developments in transmitter /receiver design and signal conditioning are described. Also, included is a discussion of the operating experience and retrofit update of .a 12 channel, eight kilometer fiber optic super trunk. A unique feature of the system described is that only one repeater location is employed in contrast with a conventional cable TV system which would require 12 repeaters to cover the same distance.
Specific fiber optic system constraints, including modal noise and carrier distortion, are discussed and the signal conditioning methodology employed to achieve exceptional CATV operational performance is outlined. The impact of these recently developed techniques on fiber optic satellite ground station links, super trunks, and office to head end transmission links is presented.