that exist between the United States and its neighbors.
These must
not be violated when spectrum allocations and assignments are made at
the national level. Both the United States/Mexico Agreement and the
North American Regional Broadcasting Agreement (United States, the
Bahamas and Jamaica, Canada, Cuba, and the Dominican Republic) limit
the number of standard broadcast frequencies available.
Similar
constraints are imposed in the border areas by frequency modulation
and television broadcasting arrangements with Canada and Mexico. In
the nonbroadcast field, coordination procedures have been developed
with Canada for practically all spectrum bands and services above 30
megahertz.
Under this arrangement, in the land mobile service, for
example, neither the United States nor Canada will authorize a new
system within 75 miles of the border without obtaining the views of
the other country.
In the very high frequency aeronautical mobile
bands, the coordination distance may be as high as 600 miles from the
border for frequencies intended for use on flights above 24,000 feet.
LESSON 1 - EXERCISE 2
Complete items 1 through 6.
1. International allocations of the radio frequency spectrum and
registration of frequency assignments are accomplished by the
a.
International Radio Consultative Committee.
b.
International Telegraph and Telephone Consultative Committee.
c.
International Telecommunications Union.
d.
International Frequency Registration Board.
2. List the four permanent groups that compose the International
Telecommunications Union.
a.
___________________________________________________________ .
b.
___________________________________________________________ .
c.
___________________________________________________________ .
d.
___________________________________________________________ .
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