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Radio Engineers, Journal of the British Institution of

Issue 4 • Date October 1962

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Displaying Results 1 - 11 of 11
  • ¿The Radio and Electronic Engineer¿

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    Freely Available from IEEE
  • Some general features of digital data acquisition systems

    Page(s): 263 - 267
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    Digital data acquisition systems make use of a single measuring system to obtain data from many inputs and record the results for future use. Such systems usually accept analogue inputs and incorporate equipment for conversion to digital form. A typical system is described followed by details of the more novel techniques used in the major sub-units. The ways in which such systems are employed are also discussed. View full abstract»

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  • Automatic scanner loggers for small installations

    Page(s): 269 - 275
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    Automatic scanner loggers convert analogue signals representing process variables to more concisely recorded digital data, and in many instances have replaced conventional recorders and indicators previously in use in centralized control rooms. To justify the use of a scanner logger on a small installation is fairly difficult since conventional multipoint recorders will normally meet the requirements at a greatly reduced cost. There is a need for a range of digital instruments to replace the conventional potentiometric recorders eliminating the disadvantages of these instruments while providing relevant information. This paper discusses such a range of instruments referring particularly to their advantages over conventional potent ionietric recorders. View full abstract»

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  • Low-level high-speed data scanning systems

    Page(s): 277 - 286
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    A high speed data handling system for a hypersonic wind tunnel is described. The system is made up of transistorized modular elements allowing system flexibility and the possibility of further extension to cover increased scanning requirements. The low level inputs to the system are commutated by dry reed relays having characteristics which yield a fast reliable scanning switch. The advantages and disadvantages of these and other switching systems are discussed. The output from the system is in the form of a magnetic tape record which allows great flexi bility in the subsequent processing operations. View full abstract»

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  • A direct current integrator with digital output

    Page(s): 287 - 292
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    This paper outlines a number of ways of integrating with respect to time a 0 to 10 mA d.c. signal, which may be derived from an industrial measurement or control system. A new solid-state electronic integrator with superior stability and linearity is described in detail. A typical application is the measurement of total quantity of a liquid which has passed through a magnetic flowmeter. View full abstract»

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  • Telephone circuit evaluation for data transmission

    Page(s): 297 - 307
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    When using a telephone circuit for data transmission, the effect of certain characteristics on the transmitted data signals have to be evalu ated. Because of the random nature of many of these disturbances, re course is made to statistical methods based on extended tests using special measuring equipment and computer-based data reduction methods. From these, mathematical models of the various circuits can be fommiated whereby the optimum arrangement of the transmitted data and the effectiveness of various error detection and correction systems, can be determined. View full abstract»

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  • Auditory perception and its relation to ultrasonic blind guidance aids

    Page(s): 309 - 317
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    Experiments have been conducted to determine the optimum form of auditory presentation of signals received with ultrasonic echo-location guidance aids. Pulses of tone and continuous-wave frequency-modulated transmission were used, and there was no doubt that the latter form of transmission produced the most suitable auditory signals. A portable guidance aid was made, using frequency-modulation echo-location principles, and the results justify tests with a small group of blind people. View full abstract»

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  • Tuner design considerations for a combined 405/625 line television receiver

    Page(s): 319 - 323
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    U.h.f. tuner design is comparatively standardized except for means of meeting the probable requirement of 60 dB image signal rejection. The system of feeding the u.h.f. tuner into the v.h.f. stage by directly coupling to the mixer grid appears to be the logical approach, bearing in mind both technical and commercial considerations. The general design requirements to meet the use of u.h.f. in combined receivers are com paratively straightforward. The only outstanding problem is that of the eventual v.h.f. system and a scheme for meeting the likely changeover to C.C.I.R. channel allocations is put forward. View full abstract»

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  • Of current interest¿

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    Freely Available from IEEE
  • Switchable 405/625 line time-bases

    Page(s): 325 - 339
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    The design of switchable line time-bases can be channelled along two lines: constant flyback time and constant flyback to scan ratio. Some theoretical aspects connected with the two modes of operation are reviewed and possible solutions are illustrated with practical designs. View full abstract»

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Aims & Scope

The Journal of the British Institution of Radio Engineers was published by IET between 1939 and 1962.

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