Goto Section: 25.131 | 25.133 | Table of Contents
Revised as of October 1, 2014
Goto Year:2013 |
§ 25.132 Verification of earth station antenna performance standards.
(a)(1) Except for applications for 20/30 GHz earth stations and
applications subject to the requirement in paragraph (b)(3) of this
section, applications for transmitting earth stations in the
Fixed-Satellite Service, including feeder-link stations, must include
certification that the applicant has reviewed the results of a series
of radiation pattern tests performed by the antenna manufacturer on
representative equipment in representative configurations, and the test
results demonstrate that the equipment meets the off-axis gain
standards in § 25.209, measured in accordance with paragraph (b)(1) of
this section. The licensee must be prepared to submit the radiation
pattern measurements to the Commission on request.
(2) Applications for transmitting GSO FSS earth stations operating in
the 20/30 GHz band must include the antenna measurements specified in
§ 25.138(d) and (e). Applications for transmitting NGSO FSS earth
stations operating in the 20/30 GHz band must include the antenna
measurements specified in § 25.138(d).
(b)(1) For purposes of paragraph (a)(1) of this section, the following
measurements on a production antenna performed on calibrated antenna
range, as a minimum, must be made at the bottom, middle and top of each
allocated frequency band:
(i) Co-polarized patterns in the E- and H-planes for linear-polarized
antennas or in two orthogonal cuts for circularly-polarized antennas:
(A) In the azimuth plane, plus and minus 7 degrees and plus and minus
180 degrees from beam peak.
(B) In the elevation plane, 0 to 45 degrees from beam peak.
(ii) Cross-polarization patterns in the E- and H-planes for
linear-polarized antennas or in two orthogonal cuts for
circularly-polarized antennas, plus and minus 9 degrees from beam peak.
(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) Except as provided in paragraph (d) of this section, applicants
seeking authority to operate a Fixed-Satellite Service earth station
pursuant to the requirements in § 25.218, § 25.220, § 25.221, § 25.222,
§ 25.223, § 25.226, or § 25.227 must 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, except antennas subject to measurement under § 25.138(d), 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; 78 FR 14926 , Mar. 8, 2013; 79 FR 8318 , Feb. 12, 2014]
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Goto Section: 25.131 | 25.133
Goto Year: 2013 |
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