FCC 73.6025 Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 73.6025 Antenna system and station location.
(a) Applications for modified Class A TV facilities proposing the use of
directional antenna systems must be accompanied by the following:
(1) Complete description of the proposed antenna system, including the
manufacturer and model number of the proposed directional antenna. In the
case of a composite antenna composed of two or more individual antennas, the
antenna should be described as a “composite” antenna. A full description of
the design of the antenna should also be submitted.
(2) Relative field horizontal plane pattern (horizontal polarization only)
of the proposed directional antenna. A value of 1.0 should be used for the
maximum radiation. The plot of the pattern should be oriented so that 0
degrees (True North) corresponds to the maximum radiation of the directional
antenna or, alternatively in the case of a symmetrical pattern, the line of
symmetry. Where mechanical beam tilt is intended, the amount of tilt in
degrees of the antenna vertical axis and the orientation of the downward
tilt with respect to true North must be specified, and the horizontal plane
pattern must reflect the use of mechanical beam tilt.
(3) A tabulation of the relative field pattern required in paragraph (a)(2),
of this section. The tabulation should use the same zero degree reference as
the plotted pattern, and be tabulated at least every 10 degrees. In
addition, tabulated values of all maxima and minima, with their
corresponding azimuths, should be submitted.
(4) Horizontal and vertical plane radiation patterns showing the effective
radiated power, in dBk, for each direction. Sufficient vertical plane
patterns must be included to indicate clearly the radiation characteristics
of the antenna above and below the horizontal plane. In cases where the
angles at which the maximum vertical radiation varies with azimuth, a
separate vertical radiation pattern must be provided for each pertinent
radial direction.
(5) The horizontal and vertical plane patterns that are required are the
patterns for the complete directional antenna system. In the case of a
composite antenna composed of two or more individual antennas, this means
that the patterns for the composite antenna, not the patterns for each of
the individual antennas, must be submitted.
(b) Applications for modified Class A TV facilities proposing to locate
antennas within 61.0 meters (200 feet) of other Class A TV or TV broadcast
antennas operating on a channel within 20 percent in frequency of the
proposed channel, or proposing the use of antennas on Channels 5 or 6 within
61.0 meters (200 feet) of FM broadcast antennas, must include a showing as
to the expected effect, if any, of such proximate operation.
(c) Where a Class A TV licensee or permittee proposes to mount an antenna on
an AM antenna tower, or locate within 3.2 km of an AM directional station,
the TV licensee or permittee must comply with Sec. 73.1692.
(d) Class A TV stations are subject to the provisions in Sec. 73.685(d)
regarding blanketing interference.
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