Shortwave Bands - Industrial/Scientific/Medical (ISM) and Other HF Allocations

Industrial/Scientific/Medical (ISM) and Other HF Allocations

See also: ISM band

Above 10 MHz there are numerous frequencies set aside for radio astronomy, space research (FCC terminology) and standard- frequency-and-time services. RF diathermy equipment uses 27.12 MHz to heat bulk materials or adhesives for the purpose of drying or improving curing. The industrial use of the frequency suggested the use of the 11 m band for CB radio. About a dozen narrow ("sliver") allocations for ISM exist throughout the radio spectrum. These allocations are among the smallest in the HF band, with respect to national HF allocations.

Read more about this topic:  Shortwave Bands

Famous quotes containing the words industrial, scientific and/or medical:

    Adulthood is the ever-shrinking period between childhood and old age. It is the apparent aim of modern industrial societies to reduce this period to a minimum.
    Thomas Szasz (b. 1920)

    If a man is a good lawyer, a good physician, a good engineer ... he may be a fool in every other capacity. But no deficiency or mistake of judgment is forgiven to a woman ... and should she fail anywhere, if she has any scientific attainment, or artistic faculty, instead of standing her interest as an excuse, it is censured as an aggravation and offence.
    E.P.P., U.S. women’s magazine contributor. The Una, p. 28 ( February 1855)

    If science ever gets to the bottom of Voodoo in Haiti and Africa, it will be found that some important medical secrets, still unknown to medical science, give it its power, rather than the gestures of ceremony.
    Zora Neale Hurston (1891–1960)