Goto Section: 25.131 | 25.133 | Table of Contents
FCC 25.132
Revised as of December 4, 2012
Goto Year:2011 |
2013
§ 25.132 Verification of earth station antenna performance standards.
(a)(1) All applications for transmitting earth stations, except for
earth stations operating in the 20/30 GHz band, must be accompanied by
a certificate pursuant to § 2.902 of this chapter from the manufacturer
of each antenna that the results of a series of radiation pattern tests
performed on representative equipment in representative configurations
by the manufacturer demonstrates that the equipment complies with the
performance standards set forth in § 25.209. The licensee must be
prepared to demonstrate the measurements to the Commission on request.
(2) All applications for transmitting earth stations operating in the
20/30 GHz band must be accompanied by the measurements specified in
§ § 25.138(d) and (e).
(b)(1) In order to demonstrate compliance with § 25.209 (a) and (b),
the following measurements on a production antenna performed on
calibrated antenna range, as a minimum, shall be made at the bottom,
middle and top of each allocated frequency band and submitted to the
Commission:
(i) Co-polarized patterns for each of two orthogonal senses of
polarizations in two orthogonal cuts of the antenna.
(A) In the azimuth plane, plus and minus 7 degrees and plus and minus
180 degrees.
(B) In the elevation plane, zero to forty-five degrees.
(ii) Cross-polarization patterns in the E- and H-planes, plus and minus
9 degrees.
(iii) Main beam gain.
(2) The FCC envelope specified in § 25.209 shall be superimposed on
each pattern. The minimum tests specified above are recognized as
representative of the performance of the antenna in most planes
although some increase in sidelobe levels should be expected in the
spar planes and orthogonal spar planes.
(3) Applicants seeking authority to use an antenna that does not meet
the standards set forth in § § 25.209(a) and (b), pursuant to the
procedure set forth in § 25.220, § 25.221, § 25.222, § 25.223 or
§ 25.226, are required to submit a copy of the manufacturer's range
test plots of the antenna gain patterns specified in paragraph (b)(1)
of this section.
(c) The tests specified in paragraph (b) of this section are normally
performed at the manufacturer's facility; but for those antennas that
are very large and only assembled on-site, on-site measurements may be
used for product qualification data. If on-site data is to be used for
qualification, the test frequencies and number of patterns should
follow, where possible, the recommendations in paragraph (b) of this
section, and the test data is to be submitted in the same manner as
described in paragraph (a) of this section.
(d) For each new or modified transmitting antenna over 3 meters in
diameter, the following on-site verification measurements must be
completed at one frequency on an available transponder in each
frequency band of interest and submitted to the Commission.
(1) Co-polarized patterns in the elevation plane, plus and minus 7
degrees, in the transmit band.
(2) Co-polarized patterns in the azimuth and elevation planes, plus and
minus 7 degrees, in the receive band.
(3) System cross-polarization discrimination on-axis. The FCC envelope
specified in § 25.209 shall be superimposed on each pattern. The
transmit patterns are to be measured with the aid of a co-operating
earth station in coordination with the satellite system control center
under the provisions of § 25.272.
(e) Certification that the tests required by paragraph (c) of this
section have been satisfactorily performed shall be provided to the
Commission in notification that construction of the facilities has been
completed as required by § 25.133.
(f) Antennas less than 3 meters in diameter and antennas on simple
(manual) drive mounts that are operated at a fixed site are exempt from
the requirements of paragraphs (c) and (d) of this section provided
that a detailed technical showing is made that confirms proper
installation, pointing procedures, and polarization alignment and
manufacturing quality control. These showing must also include a plan
for periodic testing and field installation procedures and precautions.
(g) Records of the results of the tests required by this section must
be maintained at the antenna site or the earth station operator's
control center and be available for inspection.
[ 58 FR 13419 , Mar. 11, 1993, as amended at 69 FR 5710 , Feb. 6, 2004; 70 FR 32253 , June 2, 2005; 72 FR 50028 , Aug. 29, 2007; 74 FR 47102 , Sept.
15, 2009; 74 FR 57098 , Nov. 4, 2009]
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Goto Section: 25.131 | 25.133
Goto Year: 2011 |
2013
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