Industrial/Scientific/Medical (ISM) and Other HF Allocations
See also: ISM bandAbove 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:
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