Goto Section: 25.131 | 25.133 | Table of Contents
FCC 25.132
Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 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 Sec. 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 Sec. 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 Sec. Sec. 25.138(d)
and (e).
(b)(1) In order to demonstrate compliance with Sec. 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 Sec. 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 Sec. Sec. 25.209(a) and (b) of this part, pursuant to the
procedure set forth in Sec. 25.220 or Sec. 25.223(c) of this part, 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 Sec. 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 Sec. 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 Sec. 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]
Goto Section: 25.131 | 25.133
Goto Year: 2006 |
2008
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