Journal•ISSN: 0147-3204
IEEE Transactions on Cable Television
Institute of Electrical and Electronics Engineers
About: IEEE Transactions on Cable Television is an academic journal. The journal publishes majorly in the area(s): Amplifier & Cable television. It has an ISSN identifier of 0147-3204. Over the lifetime, 68 publications have been published receiving 411 citations.
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TL;DR: Pulse interval and width modulation (PIM) as discussed by the authors is a pulse analog modulation system suitable for light emitting diodes that is characterized by the following compared with Pulse Interval Modulation: Pulse repetition frequency is reduced by one half.
Abstract: This paper proposes new pulse analog modulation system; Pulse Interval and Width Modulation suitable for light emitting diodes. In this system pulses have information on both their width and interval between them. Pulse Interval and Width Modulation is characterized by the following compared with Pulse Interval Modulation. First: Pulse repetition frequency is reduced by one half. Second: Duty ratio is 50 % on the average. Third: More power is needed while carrier to noise ratio could be improved instead. The paper shows how it works and comparison with another pulse analog modulation such as Pulse Frequency Modulation or Pulse Interval Modulation. The paper also shows an experiment of twin channel transmission employing two light emitting diodes, two optical fiber transmission lines and two PIN photodiodes as an example of application of Pulse Interval and Width Modulation.
57 citations
TL;DR: In this paper, a conceptual design of a switched television-distribution system based on analogue intensty-modulated (IM) transmission through optical-fiber waveguides is discussed.
Abstract: A conceptual design of a switched television-distribution system based on analogue intensty-modulated (IM) transmission through optical-fiber waveguides is discussed. Transmission of two TV channels and provision of telephone or data service over two optical-fiber waveguides to each subscriber by frequency-division multiplexing is considered first and then other design options such as spatial-division multiplexing, inclusion of copperwire pairsfor the supply of electrical power and telephone or data service is reviewed. Thepresent state ofdevelopment of system components is also discussed and areas requiring further development are pointed out. Theoretical Calculation of the possible transmission distances for analogue IM transmission of baseband and frequency-division multiplexed video signals is described. The results show that if-3 dBm (0.5 mW) of optical power modulated by a baseband video signal to a peak modulationfactor of 80% is launched into an optical-fiber waveguide, a distance of approximately 15 km can be spanned without a repeater. It is concluded that in view ofthe distances that can be covered by low-loss optical-fiber transmission systems, a centrally switched optical television distribution system may well be attractive for applications not only to urban areas, but also to rural areas. It is further suggested that an economic analysis is needed to ascertain the practicality of such a system.
31 citations
TL;DR: In this article, a hub oriented optical fiber TV distribution system is described, where a simple set-top coverter delivers pictures to a conventional TV set, and a low cost connector concept is also discussed.
Abstract: A practical hub oriented optical fiber TV distribution system is described. Pulse Width Modulation is utilized for ease in switching and a simple set-top coverter delivers pictures to a conventional TV set. A low cost connector concept is also discussed.
29 citations
TL;DR: In this paper, a new optical communication system using the Pulse Interval and Width Modulated Code (PIC) was proposed, which is constructed as combinations of pulse width and interval.
Abstract: This paper proposes a new optical communication system using the Pulse Interval and Width Modulated Code. It is constructed as combinations of pulse width and interval. Then it is easy to understand that the transmission capacity of this Code is bigger than those of Pulse Width Modulation and/or Differencial Pulse Position Modulation.
24 citations
TL;DR: A curve showing the required third order intermodulation (composite triple beat) level for high quality performance is presented and a set of curves which show the relative readings between a power meter, signal level meter and spectrum analyzer, when measuring the third orderintermodulation, are given.
Abstract: This paper discusses the build-up of third order intermodulation in a CATV system and presents a curve showing the required third order intermodulation (composite triple beat) level for high quality performance. A set of curves which show the relative readings between a power meter, signal level meter and spectrum analyzer, when measuring the third order intermodulation is also given.
22 citations