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Radio and Electronic Engineer

Issue 4 • Date April 1971

 This issue contains several parts.Go to:  Part S 

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Displaying Results 1 - 9 of 9
  • Over-Production¿of Engineers?

    Publication Year: 1971
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  • The seventh clerk maxwell memorial lecturer

    Publication Year: 1971
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  • The seventh clerk maxwell memorial lecture: guided electromagnetic waves

    Publication Year: 1971 , Page(s): 147 - 152
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  • Influence of noise in automatic measurements by insertion test signals

    Publication Year: 1971 , Page(s): 153 - 162
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    A theoretical study is presented on the noise affecting the automatic television measurements carried out by test signals in the field blanking interval (insertion test signals). On the basis of the results it is shown that special signals (national test signals) can be used, for automatic measurements, instead of the international signals and the measurement devices are defined so as to obtain measurements affected as little as possible by noise. View full abstract»

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  • Rate control for vacuum co-deposition of thin film cermets

    Publication Year: 1971 , Page(s): 163 - 171
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    In vacuum co-deposition of thin cermet resistor films it has been found that the electrical properties are sensitive to deposition rates, thus needing a two-channel rate controller. The requirements of such an instrument are outlined and alternative systems are briefly compared, resulting in the choice of a digital data processor and step feedback control. A detailed description of the logic and circuit design of the instrument built is presented along with a brief discussion of the operational limitations and difficulties. Possible extensions of the instrument to other needs are considered. View full abstract»

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  • Stability analysis of an improved mode control amplifier

    Publication Year: 1971 , Page(s): 172 - 176
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    The stability and bandwidth characteristics of a mode control amplifier can be substantially improved by addition of a resistor in series with computing capacitor. It is shown that the effects of such a modification of the feedback path configuration on computing accuracy can easily be balanced out. View full abstract»

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  • A camera tube lag meter

    Publication Year: 1971 , Page(s): 177 - 180
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (445 KB)  

    The exposure of a camera tube to a brief flash of light and the measurement of the magnitude of the signal current after a known number of television fields can provide an indication of the speed of response of the tube to changing light levels. A meter which permits accurate lag measurements, in the presence of noise, to within an accuracy of ±0.1% of white level is described and its performance is discussed. View full abstract»

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  • The mediator air traffic control system comes into operation

    Publication Year: 1971 , Page(s): 181 - 182
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  • Application of insertion test signal techniques to television transmission chain operation

    Publication Year: 1971 , Page(s): 183 - 191
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    This paper discusses the advantages to be obtained from insertion test signal techniques. Consideration is given to the types of distortion which need to be measured and the consequent requirements of the test signal waveform. Methods of measurement are discussed and typical results obtained in practice are shown. Probable accuracy of measurement is considered and the paper concludes with a suggestion of some possible future developments. View full abstract»

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