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Radio and Electronic Engineer

Issue 2 • Date February 1976

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Displaying Results 1 - 6 of 6
  • Professional engineers and trade unions

    Publication Year: 1976
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (135 KB)  

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  • FacsimileߞA review

    Publication Year: 1976 , Page(s): 55 - 63
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1237 KB)  

    The development and potential of facsimile as an alternative means of communication over voicegrade telephone lines is discussed. The components of typical facsimile systems are described, and the characteristics of telephone channels in so far as they influence the performance of facsimile machines are covered, together with the problems confronting manufacturers. These include standardization, c... View full abstract»

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  • Hazards to inflammable fuels and vapours due to induced microwave radiation

    Publication Year: 1976 , Page(s): 64 - 68
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (485 KB)  

    Experimental results are presented for the minimum energy required for ignition of various gas/air mixtures in a microwave test cell. View full abstract»

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  • An automatic clarifier for s.s.b. speech communication

    Publication Year: 1976 , Page(s): 69 - 75
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (721 KB)  

    By introducing certain inaudible distortion into the audio wave-forms used to modulate an s.s.b. transmitter it becomes possible to detect any frequency translations in the system. Audio frequency circuits in the receiver generate an a.f.c. voltage proportional to any such translation, and and this is used automatically to correct the frequency of the local carrier generator without the need for p... View full abstract»

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  • A peripheral-sharing interlinked mini-computer system

    Publication Year: 1976 , Page(s): 76 - 82
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (654 KB)  

    The system described allows several interlinked mini-computers to communicate with each other and to share a range of peripherals under software control, thus giving a wide variety of configurations depending upon program requirements. View full abstract»

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  • Performance of an M-ary p.s.k. system in the presence of additive noise, intersymbol interference and fading

    Publication Year: 1976 , Page(s): 83 - 91
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1031 KB)  

    The results of an investigation of the evaluation of energy signal degradation of an M-ary p.s.k. system due to intersymbol interference and fading are analysed. Attention is concentrated upon the influence of intersymbol interference caused by the limited band of the receiver filter as well as the transmitter one. As far as the channel is concerned, it has been assumed there is nonselective fadin... View full abstract»

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