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Broadcasting, IEEE Transactions on

Issue 1 • Date June 1966

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Displaying Results 1 - 12 of 12
  • IEEE Transactions on Broadcasting - Table of contents

    Publication Year: 1966 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Broadcasting Group

    Publication Year: 1966 , Page(s): c2
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    Freely Available from IEEE
  • Medium-Frequency Sky Wave Propagation in Middle and Low Latitudes

    Publication Year: 1966 , Page(s): 1 - 14
    Cited by:  Papers (5)
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    Frequency assignments to particular broadcasting stations within the range 150-1500 kHz are now made on the basis of empirically derived sky wave propagation curves that are used to determine the service and interference field strengths of these stations. Using the concept of propagation loss, a detailed comparison is presented between two series of propagation curves used for this purpose in the United States and in Europe. Serious differences are shown to exist even though both series are based on extensive measurements taken in similar middle latitude areas. Using all the available data and guided by the theory of medium-frequency ionospheric propagation, a new series of sky wave propagation curves is derived which shows a different frequency dependence factor; these new curves are believed to be more applicable in middle latitude areas than either of the present series. View full abstract»

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  • Operation of a Multiplex Linear Amplifier at WIBF-TV in Philadelphia

    Publication Year: 1966 , Page(s): 14 - 20
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    In April, 1964, the Federal Communications Commission adopted new rules regarding visual to aural power ratios whereby a ratio as high as 10 to 1 was authorized. This offered some interesting possibilities for minor cost reduction in conventional transmitter manufacture, such as use of a high-power klystron in the visual stage and a low-power tetrode in the aural stage. On the other hand, the possibility of multiplexing both visual and aural signals through one klystron as a means of cost reduction appeared much more attractive in that a complete aural amplifier of any type could be eliminated. View full abstract»

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  • Antenna Pattern Measurements Considerations

    Publication Year: 1966 , Page(s): 21 - 24
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    The requirements for the construction of two different types of antenna test sites are presented and discussed. The methods used currently for measuring the radiation patterns of antennas after installation are also discussed. View full abstract»

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  • Sweep-Frequency Oblique Ionospheric Sounding at Medium Frequencies

    Publication Year: 1966 , Page(s): 25 - 27
    Cited by:  Papers (5)
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    An experimental ionospheric sounder has been constructed for vertical-incidence or oblique sounding in the frequency range 600 kHz to 2 MHz. The equipment employs an FM linear frequency sweep transmission generated by direct synthesis from a frequency standard; an identical sweep is used for demodulation at the receiver. Sounding records, made at night over a 2000-km path, exhibit 10-¿s resolution and show no interference from broadcast stations. Radiated power ranged from 25 to 250 watts. The advantage of good time delay resolution, together with suppression of interfering signals, makes possible ionospheric sounding of greatly improved quality in the MF range. View full abstract»

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  • CATV Technical Standards

    Publication Year: 1966 , Page(s): 28 - 30
    Cited by:  Papers (1)
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    Legal, financial, and other franchise conditions of Community Antenna Television (CATV) systems are discussed. Technical specifications deemed necessary to provide adequate service to subscribers are advanced. View full abstract»

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  • Level Adjustment of Audio Signals by Means of a Solid-State Electronic Attenuator

    Publication Year: 1966 , Page(s): 30 - 37
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    A solid-state centralized system of level adjustments of audio signals is described. The problem considered was how to adjust and vary the level of audio signals with the same precision achieved with present mechanical step-attenuators. The method finally decided upon was that of using the variable-impedance characteristic of a forward-biased diode. The diode impedance decreases proportionately to the forward direct current flowing through it. View full abstract»

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  • The Picturephone Set

    Publication Year: 1966 , Page(s): 37 - 42
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    A discussion is presented on the design parameters and operating problems connected with transmission of video information across telephone lines. View full abstract»

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  • Technical Performance of Community Antenna Television Systems

    Publication Year: 1966 , Page(s): 43 - 47
    Cited by:  Papers (1)
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    There is a growing interest in technical performance specifications for Community Antenna Television (CATV) systems on the part of system operators, manufacturers, and governmental regulatory bodies. There is at present no accepted standard for such operations. This paper outlines the major elements involved in adequate specifications. Numerical performance standards are suggested in some cases; in others, more work appears necessary to develop suitable measuring techniques and to determine the correlation between subjective evaluation of picture quality and measurable video signal characteristics. An Appendix provides a concise tabulation of suggested minimum performance specifications. View full abstract»

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  • Blank Page

    Publication Year: 1966 , Page(s): 47a
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    Freely Available from IEEE
  • Information about the Society

    Publication Year: 1966 , Page(s): 47-b - 47-c
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    Freely Available from IEEE

Aims & Scope

IEEE Transactions on Broadcasting covers the field of broadcast technology, including the production, distribution, transmission, and propagation aspects of broadcasting.

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Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada