IEEE Spectrum

Issue 2 • Feb. 1992

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Displaying Results 1 - 8 of 8
  • WARC's last act?

    Publication Year: 1992, Page(s):20 - 23
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (651 KB)

    The upcoming 1992 World Administrative Radio Conference is discussed. The reasons for its importance are given, and three new types of services that are high on the list for consideration are examined. They are universal personal telecommunications, digital audio broadcasting, and high-definition satellite TV. US preparations for the conference and important international alliances are discussed.<... View full abstract»

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  • Broadcasting

    Publication Year: 1992, Page(s):24 - 26
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (629 KB)

    Three major allocation issues involving the broadcasting and broadcasting-satellite services that will be discussed at the 1992 World Administrative Radio Conference (WARC-92) are examined. They are expansion of frequencies for conventional high-frequency (shortwave) broadcasting, new frequencies for both satellite and terrestrial digital audio (radio) broadcasting to handheld and automobile recei... View full abstract»

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  • Mobile communications

    Publication Year: 1992, Page(s):27 - 29
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (466 KB)

    An important issue facing the 1992 World Administrative Radio Conference, namely, determining how to provide additional spectrum for both existing and entirely new mobile services, is examined. At least six types of mobile systems will be seeking new or expanded allocations; three involve satellites and three rely on primarily terrestrial techniques. All but one will be forced to compete for alloc... View full abstract»

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  • Space communications

    Publication Year: 1992, Page(s):30 - 33
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (687 KB)

    Six proposals for enhancing or expanding the electromagnetic spectrum allocated for communications supporting research in space, which will be heard by the 1992 World Administrative Radio Conference, are discussed. They will cover extravehicular activities, space operations, data relay links, deep space interplanetary probes, future planetary missions, and Earth exploration satellites. Of primary ... View full abstract»

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  • Testability on TAP

    Publication Year: 1992, Page(s):34 - 37
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    A new approach to testing based on boundary scan is discussed. This technique gives access to individual chip pins by including a little standardized circuitry and a test access port (TAP) on every IC. Boundary scan basics are reviewed, and three principal types of tests that can be performed with the boundary-scan register are described. They are: interconnect tests, using the EXTEST (external te... View full abstract»

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  • Digital storage scopes advance

    Publication Year: 1992, Page(s):38 - 41
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (613 KB)

    The use of color display and data storage techniques that make for more meaningful signal views and complex statistical measurements, using the digital storage oscilloscope (DSO), are discussed. These techniques make good the loss of information about waveform stability, made evident by the varying intensity of traces on an analog scope display, that occurs when switching to a digital scope. Varia... View full abstract»

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  • Switching to photonics

    Publication Year: 1992, Page(s):42 - 45
    Cited by:  Papers (7)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The use of hardware that exploits the interplay of photons and electrons to switch voice, data, and video is discussed. The two directions being taken by current research-guided-wave and free-space photonics-are examined. Photonic time-slot interchanges are described. Multidivisional fabrics, based on a combination of space-division and time-division multiplexing, are considered, as is the wavelen... View full abstract»

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  • Hawaii's geothermal program

    Publication Year: 1992, Page(s):49 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB)

    Opposition to Hawaii's geothermal program, which is coming not only from the usual citizens' and environmental groups, but also from worshippers of a native god and, it has been alleged, growers of marijuana, is discussed. The clash occurs just as geothermal power sources have finally proven commercially viable. The most effective opposition to the project has been mounted by local residents and e... View full abstract»

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