Goto Section: 25.131 | 25.133 | Table of Contents
FCC 25.132
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 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: 2014 |
2016
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