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Electronics & Communication Engineering Journal

Issue 2 • Date Apr 1994

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Displaying Results 1 - 6 of 6
  • Specification of the broadband user-network interface

    Publication Year: 1994 , Page(s): 105 - 112
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (540 KB)  

    Broadband ISDN requires a clear and unambiguous specification of the interface between customers' equipment and the public network - the user-network interface-so that equipment and networks can be developed that will work together. A project was carried out under the RACE collaborative programme to develop a specification for this interface. This paper examines the background to the user-network ... View full abstract»

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  • Erbium-doped fibre amplifiers: the latest revolution in optical communications

    Publication Year: 1994 , Page(s): 59 - 67
    Cited by:  Patents (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (728 KB)  

    Like many technological advances associated with optical fibre communication, erbium-doped fibre amplifiers have moved from the laboratory to the field with extraordinary speed. They are capable of low-noise, low-distortion, high-gain and high-power operation over a broad bandwidth. The paper describes the physical principles behind their operation and shows how their unique characteristics are se... View full abstract»

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  • The Chilbolton advanced meteorological radar: a tool for multidisciplinary atmospheric research

    Publication Year: 1994 , Page(s): 77 - 86
    Cited by:  Papers (5)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (680 KB)  

    An ex-air-surveillance S-band radar was installed on the 25 m antenna at Chilbolton, near Winchester, over 20 years ago for studies of the effects of rain on communications systems. Since that time the functionality of the radar has been steadily developed to keep it at the forefront of meteorological research radars throughout the world. Recent developments have added phase and Doppler capabiliti... View full abstract»

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  • Measurement techniques for monolithic microwave integrated circuits

    Publication Year: 1994 , Page(s): 69 - 76
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (576 KB)  

    Introduces the basic technologies that are associated with measurements of monolithic microwave integrated circuits. The use of test fixtures and wafer probe stations at ambient room temperature is reviewed and their role at thermal and cryogenic temperatures is discussed. With the increasing need for performing non-invasive measurements, advances in experimental field probing techniques are explo... View full abstract»

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  • Ultrasonic surveying of fully charged sewage pipes

    Publication Year: 1994 , Page(s): 87 - 92
    Cited by:  Papers (5)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (460 KB)  

    Between 5 and 10% of closed-circuit television surveys of sewers in the UK are abandoned because the images are not sufficiently clear when the camera becomes submerged. Ultrasonic scanning can overcome this problem. The paper describes measurements which have been made to determine the acoustic properties of sewage and the characteristics of a sonar survey system which has been undergoing trials View full abstract»

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  • Screening of cables and connectors

    Publication Year: 1994 , Page(s): 93 - 102
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (624 KB)  

    Cable and connector screening is given as transfer impedance, which relates a voltage seen inside the component to the current on its outside. One transient disturbance comes from switching on the local mains network, which results in large RF currents flowing in an instrument cable nowhere near the original source. The effect of this current on cables and connectors is assessed using their transf... View full abstract»

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