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Radio and Electronic Engineer

Issue 6 • Date June 1967

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Displaying Results 1 - 8 of 8
  • Migration of engineers

    Publication Year: 1967
    IEEE is not the copyright holder of this material | PDF file iconPDF (102 KB)
    Freely Available from IEEE
  • A hot electron, cold cathode, emitter

    Publication Year: 1967, Page(s):347 - 352
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (796 KB)

    A hot electron, thin-film, cold-cathode device is described which has an emission efficiency much higher than previously reported for similar cathodes. Measurements of the emission current and distributionat various voltages indicate the importance of a coherent scattering process, which if not considered in the design of the cathode will severely limit the emission efficiency. The important condi... View full abstract»

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  • Digital read-out echo sounder

    Publication Year: 1967, Page(s):353 - 360
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2059 KB)

    The trend towards automation in hydrographic survey and oceanography calls for automatic read-out of depth from an echo sounder. A system of signal selection is described which includes an automatic time gate synchronized with the sea-bed echo. Automatic gain control is also used to maintain optimum amplitude discrimination throughout varying conditions. A recording echo sounder forms an integral ... View full abstract»

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  • Simultaneous use of sideways-looking sonar, strata recorder and echo sounder

    Publication Year: 1967, Page(s):361 - 368
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (8934 KB)

    In geological survey, the simultaneous operation of these three equipments on one vessel can have considerable merit. The sideways-looking sonar (known as the `Transit Sonar¿) has a range of 600 yd and gives an approximately true plan of the sea bed on dry paper 6 in. wide when the ship moves at 5.7 (or 2.85) knots over the ground. The record produced by the `Transit Sonar¿ may be readily correl... View full abstract»

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  • Television wired broadcasting systems

    Publication Year: 1967, Page(s):369 - 383
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2056 KB)

    The paper outlines the growth of television wired broadcasting in the United Kingdom. After considering the fundamental problems involved in the use of video h.f. and v.h.f. frequencies, it describes the way these problems have been solved for h.f. and v.h.f. systems. Brief descriptions of practical h.f. and v.h.f. systems are given and this is followed by a comparison of the relative costs of the... View full abstract»

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  • An optical communication link for laboratory demonstration using microwave modulation of the light beam

    Publication Year: 1967, Page(s):384 - 386
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (259 KB)

    A simple system designed to demonstrate the possibility of transmission of information over an optical path, using a microwave sub-carrier, is described. It is shown that a satisfactory signal/noise ratio can easily be obtained under laboratory conditions, and the practical limitations of such a system are briefly outlined. View full abstract»

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  • A new sound velocity meter

    Publication Year: 1967, Page(s):387 - 393
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (665 KB)

    The design of a new instrument for measuring the velocity of sound in sea water with improved accuracy is described. A particular feature of the instrument is that it may be towed through the water without causing appreciable errors View full abstract»

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  • Conversion of a PAL Colour-Television Signal into a Symmetrical Dot-sequential Signal

    Publication Year: 1967, Page(s):394 - 400
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (602 KB)

    An N.T.S.C.-type colour-television signal can be converted into a driving signal for a one-gun display tube without full demodulation of the sub-carrier signal. With the adoption of the PAL system for colourtelevisionbroadcasts in many countries of Europe the question arises whether similar methods can be devised for transcoding a PAL signal into a driving signal for dot-sequential display systems... View full abstract»

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