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Proceedings of the IEEE

Issue 7 • Date July 1970

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Displaying Results 1 - 25 of 58
  • [Front cover and table of contents]

    Publication Year: 1970, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1970, Page(s):961 - 962
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • A U.S. government view of CATV and its future

    Publication Year: 1970, Page(s):963 - 966
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper traces the development and regulation of cable television from the early 1950's to the present. It illustrates the increasing impact on broadcasting of expanding cable capacity and the Federal Communications Commission's regulatory response thereto, including the requirement of carriage and nonduplication of local signals, and regulation of the importation of distant signals. It conside... View full abstract»

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  • The emergence of CATV: A look at the evolution of a revolution

    Publication Year: 1970, Page(s):967 - 982
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2033 KB)

    The growth of CATV or cable television has often been characterized as "explosive." Since 1952, the first year in which reliable statistics were accumulated, the number of CATV systems have multiplied 35 times and it is now estimated that over 4½ million families are receiving CATV service from approximately 2350 cable TV systems. This growth is especially impressive when it is considered tha... View full abstract»

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  • Wired-city television revisited

    Publication Year: 1970, Page(s):982 - 986
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (606 KB)

    Raymond Williams has usefully distinguished among communication systems according to how easy it is for potential users to gain access to communications media. In this paper Williams' concepts are applied to an analysis of the television system in the United States. In addition, proposals for social applications of television which require a greatly expanded channel capacity are noted, and conside... View full abstract»

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  • A satellite system for CATV

    Publication Year: 1970, Page(s):987 - 1001
    Cited by:  Papers (1)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1185 KB)

    The increasing capacity of CATV systems has generated a demand for more program material than can be economically generated with local facilities. A possible solution is a nationwide satellite distribution system dedicated to CATV which would provide the additional material directly to the CATV head-end. This paper presents a satellite system design that would distribute six TV channels to 10 ft a... View full abstract»

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  • Distribution of electronic mail over the broad-band party-line communications network

    Publication Year: 1970, Page(s):1002 - 1012
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Cable television (CATV) is unique in that it is the only wire, besides telephone, with potential access to 80 million customers. Many new services have been proposed to utilize this access-from meter reading to transmission of an entire book in seconds. The author postulates that electronic mail is the market CATV should pursue and describes the market potential, a system design in some detail, an... View full abstract»

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  • A compatible high-resolution TV system for cablecasting

    Publication Year: 1970, Page(s):1013 - 1015
    Cited by:  Papers (2)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (307 KB)

    Cablecasting offers the possibility of a new and improved system of color television. New technology for wide bandwidth, for large displays, and better signal transmission systems make it desirable to improve on the National Television System Committee (NTSC) system which has served so well for over-the-air transmissions. In this paper, a system is suggested with which a subscriber owning a presen... View full abstract»

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  • Dial a program—An HF remote selection cable television system

    Publication Year: 1970, Page(s):1016 - 1023
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2498 KB)

    A new concept in cable television systems is described in which the general form of the network is similar to the local distribution network of a telephone system. Each television set is provided with an individual connection to a program exchange where the subscriber may select, by means of a remotely operated switch, the program of his choice from the unlimited number of programs available at th... View full abstract»

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  • Frequency band assignments free of second-order beat interference

    Publication Year: 1970, Page(s):1024 - 1026
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (253 KB)

    This paper analyzes the restrictions on the bandwidth of a system carrying a multiplicity of modulated signals, if all second-order beats are to occur outside the band. This is of particular interest in cable TV systems where the signals are frequently assigned to two bands separated by a "mid-band" where no signals are assigned. View full abstract»

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  • A digital video system for the CATV industry

    Publication Year: 1970, Page(s):1026 - 1035
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (972 KB)

    A ditigal pulse code modulator (PCM) system is proposed to implement long-haul video system for the CATV industry. A comparison is made between PCM system and wide-band FM system in terms of repeaterability versus additional occupied signal bandwidth. This is followed by a noise analysis of coaxial cable to determine the correct PCM format and bit information rate. An 80- megabit system is selecte... View full abstract»

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  • Structural return loss phenomenon in coaxial cables

    Publication Year: 1970, Page(s):1036 - 1050
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1115 KB)

    This paper presents a study of the structural return loss (SRL) phenomenon pertaining to coaxial cables. Basic equations are developed, the effect of periodic changes in the physical structure of the cables is analyzed, measuring principles and techniques are discussed, and a method of fault location using the SRL test technique is given. View full abstract»

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  • The optimum gain for a CATV line amplifier

    Publication Year: 1970, Page(s):1050 - 1056
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (678 KB)

    It is well known that in a CATV trunk line, where all amplifiers are spaced for identical gain and all have the same noise figure and distortion characteristics, the individual amplifier gain resuiting in the longest usable system is one napier (8.69 dB). The gain of amplifiers used in CATV today is usually near 20 dB. This paper attempts to develop two reasons why the optimum gain in a real situa... View full abstract»

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  • Second-order distortion in CATV push-pull amplifiers

    Publication Year: 1970, Page(s):1057 - 1062
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2139 KB)

    There are several techniques available for the transportation and distribution of multichannel television signals or, for that matter, multicarriers of any kind, involving the use of repeater amplifiers. One such technique uses push-pull amplifier equipment and, avoiding the pros and cons of the various methods, this paper briefly discusses some of the advantages of push-pull amplifiers and treats... View full abstract»

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  • Cross-modulation figure of merit for transistor amplifier stages

    Publication Year: 1970, Page(s):1063 - 1071
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (766 KB)

    This article concerns itself with comparison of transistor amplifier configurations in relation to their cross-modulation distortion characteristics. Only the base-emitter junction nonlinearity is considered, since this nonlinearity is considered to be the most significant contributor to cross-modulation distortion. For this case investigations have shown that since cross modulation occurs because... View full abstract»

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  • The decibel relationships between amplifier distortion products

    Publication Year: 1970, Page(s):1071 - 1086
    Cited by:  Papers (40)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1320 KB)

    Assuming that the transfer characteristic of the amplifier can be represented by a power series with three terms, an analysis is carried out to determine the frequency and amplitude of each distortion component. To make it easy to apply these results to a practical situation, the necessary constants are defined to enable expressing these relationships in decibel terms. The results are simple expre... View full abstract»

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  • Field testing the performance of a cable TV system

    Publication Year: 1970, Page(s):1086 - 1102
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10453 KB)

    The cable television industry is in the process of developing appropriate instrumentation and techniques for reliably measuring system performance. Data and waveform oscilloscope trace photographs obtained in actual performance tests in the field at Charleston, W. Va., are included in this paper with discussion of methods and results. Ample room for improvement both in test equipment and technique... View full abstract»

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  • Color television signal demodulation and the K rating

    Publication Year: 1970, Page(s):1103 - 1111
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10948 KB)

    This paper discusses the waveform approach to television signal assessment and the television K rating, with special reference to demodulator design where it is necessary to apply and use the time-variant test waveforms. Steady-state measurements alone cannot give the necessary information on television waveform distortion. The results obtained on new modulator-demodulator equipment are described. View full abstract»

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  • Ultralinear UHF power transistors for CATV applications

    Publication Year: 1970, Page(s):1112 - 1121
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1298 KB)

    An investigation of the cross-modulation performance of UHF power transistors and its correlation with the gain parameter curves S21(IC, VCB) shows that such transistors today exhibit an inherent linearity limitation and are not optimized for ultralinear applications. This means that using higher power transistors does not result in a larger output signal with low ... View full abstract»

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  • A co-channel filter for CATV

    Publication Year: 1970, Page(s):1122 - 1125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1766 KB)

    A rigorous approach permits a co-channel filter design which effectively removes the beat interference of a weaker, but still noticeable, TV station on the same channel as a desired station. Unlike previous designs, the present filter does not rely on the strength or direction of the interfering station. Rather, it uses a novel multi-frequency, multipath, phase reversal technique to accomplish can... View full abstract»

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  • Comments on "Structural return loss phenomenon in coaxial cables"

    Publication Year: 1970, Page(s): 1130
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  • On AGC transient-response behavior in cascaded amplifiers

    Publication Year: 1970, Page(s):1130 - 1131
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (237 KB)

    Automatic gain control (AGC) in systems of cascaded amplifiers is examined by transient-analysis methods. When many identical amplifiers with AGC are cascaded as in cable TV and other communications systems, transient response computations show progressive deterioration of AGC performance with increasing cascade length. View full abstract»

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  • Double-drift-region (p+pnn+) avalanche diode oscillators

    Publication Year: 1970, Page(s):1131 - 1133
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB)

    The advantages of a double-drift-region avalanche diode oscillator are discussed. Conventional structures (p+nn+or n+pp+) are essentially single-drift-region devices in that transit-time delay (for IMPATT mode) and zone transit (for TRAPATT mode) occur in a single region of one impurity type. The proposed structure (p+pnn+) has two ... View full abstract»

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  • A new technique for short-pulse compensation in phased-array scanning

    Publication Year: 1970, Page(s):1133 - 1135
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB)

    A new technique is briefly described for wide-angle scanning when the spatial pulsewidth is smaller than the length of the phased array. The concept obviates the need for the long-time delayers used with subarrays; it employs a binary phase code on the array-element modulo-2π phase shifters and a decoder matched to this phase code. View full abstract»

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  • Comments on "The distribution of FM-discriminator click widths"

    Publication Year: 1970, Page(s): 1133
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (138 KB)

    It is shown that the results given by Lob concerning the distribution of FM discriminator click widths are incorrect. The error in Lob's analysis is indicated. View full abstract»

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