Goto Section: 25.222 | 25.224 | Table of Contents
FCC 25.223
Revised as of December 4, 2012
Goto Year:2011 |
2013
§ 25.223 Off-axis EIRP spectral density limits for feeder link earth
stations in the 17/24 GHz BSS.
(a) This section applies to all applications for earth station licenses
in the 17/24 GHz BSS frequency bands, except for applications in which
the proposed antenna does not conform to the standards of § § 25.209(a)
and (b), and/or the proposed power density levels are in excess of
those specified in § 25.212(f) of this part.
(b) All applications for earth station licenses in the 24.75-25.25 GHz
portion of 17/24 GHz BSS shall be routinely processed if they meet the
following requirements:
(1) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density
for co-polarized signals shall not exceed the following values, within
±3° of the GSO arc, under clear sky conditions:
32.5-25log(θ) dBW/MHz for 2° ≤ θ ≤ 7°
11.4 dBW/MHz for 7° ≤ θ ≤ 9.2°
35.5-25log(θ) dBW/MHz for 9.2° ≤ θ ≤ 48°
3.5 dBW/MHz for 48° ≤ θ ≤ 180°
Where θ is the angle in degrees from the axis of the main lobe.
(2) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density
for co-polarized signals shall not exceed the following values, for all
directions other than within ±3° of the GSO arc, under clear sky
conditions:
35.5-25log(θ) dBW/MHz for 2° ≤ θ ≤ 7°
14.4 dBW/MHz for 7° ≤ θ ≤ 9.2°
38.5-25log(θ) dBW/MHz for 9.2° ≤ θ ≤ 48°
6.5 dBW/MHz for 48° ≤ θ ≤ 180°
Where θ is the angle in degrees from the axis of the main lobe.
(3) The values given in paragraphs (b) (1) and (2) of this section may
be exceeded by 3 dB, for values of θ > 10°, provided that the total
angular range over which this occurs does not exceed 20° when measured
along both sides of the GSO arc.
(4) 17/24 GHz BSS earth station antenna off-axis EIRP spectral density
for cross-polarized signals shall not exceed the following values, in
all directions greater than +3 relative to the GSO arc, under clear sky
conditions:
22.5-25log(θ) dBW/MHz for 2° ≤ θ ≤ 7°
1.4 dBW/MHz for 7° ≤ θ ≤ 9.2°
Where is the angle in degrees from the axis of the main lobe.
(c) Notwithstanding § 25.220 of this part, each applicant for earth
station license(s) that proposes levels in excess of those defined in
paragraph (b) of this section shall:
(1) Submit link budget analyses of the operations proposed along with a
detailed written explanation of how each uplink and each transmitted
satellite carrier density figure is derived;
(2) Submit a narrative summary which must indicate whether there are
margin shortfalls in any of the current baseline services as a result
of the addition of the applicant's higher power service, and if so, how
the applicant intends to resolve those margin short falls;
(3) Certify that all potentially affected parties acknowledge and do
not object to the use of the applicant's higher power densities. For
proposed power levels less than or equal to 3 dB in excess of the
limits defined above, the affected parties shall be those co-frequency
U.S. licensed 17/24 GHz BSS satellite networks that are located at
angular separations of up to ±6° away; for power levels greater than 3
dB and less than or equal to 6 dB in excess of the limits defined
above, affected parties shall be all those co-frequency U.S. licensed
operators at up to ±10° away. No power levels greater than 6 dB in
excess of the limits defined above shall be permitted.
(d) Licensees authorized pursuant to paragraph (c) of this section
shall bear the burden of coordinating with any future applicants or
licensees whose proposed compliant operations at 10 degrees or smaller
orbital spacing, as defined by paragraph (b) of this section, is
potentially or actually adversely affected by the operation of the
non-compliant licensee. If no good faith agreement can be reached,
however, the non-compliant licensee shall reduce its earth station EIRP
spectral density levels to be compliant with those specified in
paragraph (b) of this section.
(e) For earth stations employing uplink power control, the values in
paragraphs (b) (1), (2), and (4) of this section may be exceeded by up
to 20 dB under conditions of uplink fading due to precipitation. The
amount of such increase in excess of the actual amount of monitored
excess attenuation over clear sky propagation conditions shall not
exceed 1.5 dB or 15% of the actual amount of monitored excess
attenuation in dB, whichever is larger, with a confidence level of 90
percent except over transient periods accounting for no more than 0.5%
of the time during which the excess is no more than 4.0 dB.
[ 72 FR 50030 , Aug. 29, 2007]
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Goto Section: 25.222 | 25.224
Goto Year: 2011 |
2013
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