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Radio and Electronic Engineer

Issue 5 • Date May 1971

 This issue contains several parts.Go to:  Part S 

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Displaying Results 1 - 7 of 7
  • An independent communications authority

    Publication Year: 1971
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (936 KB)

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  • A comparison of P.C.M. and F.D.M.-F.M. microwave radio systems

    Publication Year: 1971, Page(s):195 - 205
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1554 KB)

    The present and future position of p.c.m. microwave line-of-sight systems is reviewed in relation to the more conventional f.d.m.-f.m. microwave systems. A comparison is made of the relative noise performance, transmitter power and system bandwidth between the two systems. The effect of rainfall attenuation is discussed. View full abstract»

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  • A new equipment for the measurement of video noise

    Publication Year: 1971, Page(s):206 - 212
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1023 KB)

    Describes a video noise measuring equipment which has been developed to meet the needs of a television broadcasting organization. The various measuring techniques available for this purpose are reviewed and the chosen method, which employs a sampling technique, is fully described. Details are then given of the practical design together with some remarks on its use. View full abstract»

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  • A high-speed ultrasonic testing machine for tubes

    Publication Year: 1971, Page(s):213 - 222
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1644 KB)

    An ultrasonic flaw detection equipment has been developed for testing steel tubes at speeds compatible with modern rates of production. The system uses a series of identical probes arranged in a ring encircling the tube. Fast sequential pulsing of the probes, together with slow rotation of the tubes gives effective circumferential scanning speeds several times faster than is obtainable by purely m... View full abstract»

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  • A low-cost seven-segmented display system

    Publication Year: 1971, Page(s):223 - 224
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (239 KB)

    An economical seven-segment display system is described which employs 21 diodes and 7 driving transistors as against 49 diodes and 14 driving transistors in a conventional display. The single driving transistor employed for each segment has to be biased so that it is normally saturated and the lamp is illuminated. To extinguish the lamp, the transistor is held below cut off by providing a suitable... View full abstract»

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  • Future electronic instrumentation for submersibles, habitats and divers

    Publication Year: 1971, Page(s):225 - 236
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (3981 KB)

    A review is made of current electronic instrumentation in use in submersibles, habitats and by divers. The design constraints of the underwater environment and their effect on electronics is discussed. A prediction is made of future requirements in the three applications considered. View full abstract»

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  • B.B.C. test chart 57, a new grey-scale reflectance chart for colour cameras

    Publication Year: 1971, Page(s):237 - 240
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (639 KB)

    The design considerations and use of a new grey-scale reflectance chart for colour cameras are discussed in relation to some of the parameters of a colour television system. The construction of a prototype chart based on the new design specification is described. View full abstract»

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