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IEE Colloquium on Accreditation of RF Measurement

2 Feb 1993

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Displaying Results 1 - 9 of 9
  • Modulation: fundamental techniques for traceability

    Publication Year: 1993, Page(s):6/1 - 6/6
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    Basic methods used to measure amplitude modulation are discussed. These include: oscilloscope slideback method; spectrum analyser method; analogue switch method; and Bessel-zero method View full abstract»

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  • RF power-review of current techniques for power sensor calibration

    Publication Year: 1993, Page(s):5/1 - 510
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    The traceability for RF power measurements in the range 100 kHz to 26.5 GHz is normally achieved by NAMAS accredited laboratories using thermocouple power sensor calibrated by SESC. This system has given adequate uncertainties over the past fifteen years. There is an increasing requirement for the upper frequency limit to be extended and for some sensors to be calibrated with lower uncertainties. ... View full abstract»

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  • Calibration of signal generators

    Publication Year: 1993, Page(s):4/1 - 4/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    There are a number of different measurement parameters in the field of radio frequency calibration. In order to provide a comprehensive measurement capability, the RF calibration laboratory must have the equipment and expertise to deal with these parameters over a suitable range and with sufficient accuracy. Amongst the most commonly encountered items submitted for calibration to the RF laboratory... View full abstract»

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  • Customer requirements for electrical calibrations

    Publication Year: 1993, Page(s):3/1 - 3/2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (124 KB)

    The author attempts to explore the different requirements placed upon calibration laboratories by their customers. In addition the limitations imposed by the accreditation bodies and their subsequent implications are discussed View full abstract»

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  • Accreditation of r.f. measurements: the future

    Publication Year: 1993, Page(s):9/1 - 9/2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (120 KB)

    In the field of electromagnetic compatibility (EMC) testing, including r.f. testing, approximately 30 NAMAS-accredited laboratories exist in 1993. These numbers reflect the business realities of demand for, and cost of, providing accredited services, whether in-house to support other business functions, or offered to a wider market. Many r.f. measurements are relatively difficult to perform reliab... View full abstract»

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  • Traceability-the national roles

    Publication Year: 1993, Page(s):2/1 - 2/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (156 KB)

    Traceability is defined as a process whereby a measurement is compared to national standards by an unbroken chain of comparisons. The author discusses a traceability hierarchy in the UK which puts the industrial base as being supported by a number of calibration laboratories which in turn are supported by a standards laboratory. The traceability hierarchy has within it the Services Electric Standa... View full abstract»

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  • Guidance on the use of coaxial connectors in radio frequency and microwave circuits

    Publication Year: 1993, Page(s):8/1 - 8/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (180 KB)

    The author suggests that coaxial connectors are often the most mistreated and ignored part of a measurement system. NAMAS have produced a coaxial connector guidance publication number NIS4303 to give information to NAMAS Accredited Laboratories on the care and use of the most commonly encountered connector types View full abstract»

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  • The status of NAMAS accreditation for electrical calibration laboratories

    Publication Year: 1993, Page(s):1/1 - 113
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (248 KB)

    RF measurement accreditation is essential for providing acceptable traceability to UK industry, and it is therefore very important that the country has sufficient accredited laboratories to provide this facility. With the limited number of NAMAS laboratories accredited for RF measurements, it would be in the interests of companies within the UK to further this network to ensure that full calibrati... View full abstract»

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  • A method for assessing the magnitude uncertainties associated with network analyser measurements

    Publication Year: 1993, Page(s):7/1 - 7/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    Without correction, errors present within an automatic network analyser (ANA) will significantly affect the response of a measurement, resulting in a misleading representation of the parameter measured. By calibration (i.e. applying error correction), these affects can be significantly reduced which results in a large overall improvement in accuracy. Calibration is the use of known impedance stand... View full abstract»

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