FCC Web Documents citing 25.204

as compiled by hallikainen.com/FccRules on 2008 09 01

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  • Hughes raises technical objections to LMC's proposed operation in portions of the Ka-band designated for other services on a primary basis, questions LMC's compliance with the Commission's two-degree orbit spacing policy so as not to interfere with Hughes' satellites, and asserts that LMC's system will not meet the requirement that earth stations utilize uplink adaptive power control pursuant to Section 25.204(g) of the Commission's rules. DISCUSSION Qualifications All applicants requesting authority to launch and operate satellite space stations must present information sufficient to establish their legal, technical, and financial qualifications to hold a Commission license. The rules set forth in Part 25 of the Commission's rules govern fixed-satellite service (``FSS'') applicants and licensees, including this application for geostationary satellite orbit GSO
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  • amended appli~ation.~ In the second request, Telenor seeks an extension of time for Telenor to file an amendment to the above-referenced modification. As explained below, we grant Telenor's requests with conditions. This grant is conditioned upon Telenor correcting the deficiencies noted in the Commission's April Z3", 2004 Letter. Specifically, the pending modification does not conform to 47 CFR Part 25, §25.204(f) for the band 13.75-14 GHz.. Further, the pending modification is unclear regarding the power flux density at the shoreline, and with respect to limitations on points of communication for the antenna identified as Ex-Ku. Moreover, an interference analysis is required to satisfy requirements of 47 CFR Part 25,525.140.~ This grant is further conditioned upon Telenor filing all of the required
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  • band. Globecomm also proposed operating at an equivalent isotropically radiated power (EIRP) of 72 dBW per carrier. While that application was pending, Globecomm requested and received Special Temporary Authority (STA) to communicate with Hispasat 1C on a non-harmful interference basis at an EIRP less than 68 dBW. In granting the STA, we also granted Globecomm's request for waiver of Section 25.204(f) of the Commission's rules, to allow it to operate at less than 68 dBW in the 13.75-14.0 GHz band. The 13.75-14.0 GHz band is a shared Government/non-Government band. In June 2002, the Satellite Division (Division) dismissed Globecomm's modification application without prejudice, based on a letter from the National Telecommunications and Information Administration (NTIA) concluding that Globecomm's proposed communications with Hispasat
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  • Description: This subpart provides clear and predictable technical standards to minimize interference. Need: To provide space station and earth station operators a universal set of standards and operating procedures. Legal Basis: 47 U.S.C. 154, 701-744. Interprets or applies 47 U.S.C. 303. Section Number and Title: 25.201 Definitions. 25.202 Frequencies, frequency tolerance and emission limitations. 25.203 Choice of sites and frequencies. 25.204 Power limits. 25.208 Power flux density limits. 25.209 Antenna performance standards. 25.210 Technical requirements for space stations in the Fixed-Satellite Service. 25.211 Video transmissions in the Fixed-Satellite Service. 25.212 Narrowband transmissions in the 12/14 GHz GSO Fixed-Satellite Service. 25.213 Inter-Service coordination requirements for the 1.6/2.4 GHz Mobile- Satellite Service. SUBPART D -- TECHNICAL OPERATIONS Brief Description: This subpart provide clear
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  • or sharing criteria, and argues that it would be unnecessary to impose the default service rules on EESS. Space Imaging further asserts that the majority of the default service rules referred to in Section 25.217 of the Commission's rules, by their own terms, do not apply to an in-orbit EESS system. Specifically, Space Imaging maintains that Sections 25.142(d), 25.143(b)(2)(ii), 25.143(b)(2)(iii), 25.204(g), and 25.210(c) of the default service rules are inapplicable. Space Imaging also maintains that Sections 25.210(d), 25.210(f), 25.210(i) and 25.210(k) of the Commission's rules are inapplicable, but requests that, to the extent the Commission believes otherwise, the Commission grant Space Imaging a waiver of these rules. We agree with Space Imaging that it is not necessary to apply the default
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  • and Title: 25.203(h) Choice of sites and frequencies. Brief Description: Establishes technical standards for operation of fixed satellite service earth stations operating in the 13.75-14 GHz frequency band. Need: Provides space station and earth station operators with standards and operating procedures to minimize interference. Legal Basis: 47 U.S.C. 154. Interprets or applies 47 U.S.C. 701-744, 554. Section Number and Title: 25.204(f) Power Limits. Brief Description: Establishes technical standards for sharing between non-geostationary orbiting mobile satellite service feeder links earth stations in the 19.3-19.7 GHz and 29.1-29.5 GHz frequency bands. Need: Provides space station and earth station operators with standards and operating procedures to minimize interference. Legal Basis: 47 U.S.C. 701-744; 47 U.S.C. 154. Interprets or applies 47 U.S.C. 303. Section Number
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  • a waiver of the U.S. Table of Frequency Allocations, 47 C.F.R. § 2.106, to allow it to use this band to receive MSS transmissions. Boeing did not request such a waiver. This, in itself, would have rendered the application incomplete and subject to dismissal. Furthermore, footnote US356 of the U.S. Table of Frequency Allocations, 47 C.F.R. § 2.106, and Section 25.204(f) of the Commission's rules, 47 C.F.R. §25.204(f), both require a minimum antenna size of 4.5 meters and an EIRP between 68 and 85 dBW. Boeing's application seeks a 1.2 meter antenna operating with a maximum EIRP of 57.48 dBW for its 2M00F9W emission. Because Boeing did not include a request for a waiver of these rules, its application is defective
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  • a response to Question E41/42 regarding transmit and receive antenna gains. Therefore, the application is incomplete and subject to dismissal on this basis. Further, in response to Question 24 of Form 312, HDTV indicates that the Ku-Band frequencies will be within the 13.75-14.5 GHz band. Footnote US356 of the U.S. Table of Frequency Allocations, 47 C.F.R. § 2.106, and Section 25.204(f) of the Commission's rules, 47 C.F.R. §25.204(f), require earth stations operating in the 13.75-14.0 GHz band to have an antenna size of at least 4.5 meters. Therefore, if HDTV chooses to refile this application and use a 3.8 meter antenna for operations in the 13.75-14.0 GHz band, it must request a waiver of footnote US356 of the U.S. Table of
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  • Service. In its application, GlobeCast does not propose to provide Broadcast Satellite Service. Further, GlobeCast indicates that its earth station will receive in the 12.7-12.75 GHz band. The allocation for this band in the Table of Frequency Allocations is designated for uplink transmissions only. Further, Footnote US356 of the U.S. Table of Frequency Allocations, 47 C.F.R. § 2.106, and Section 25.204(f) of the Commission's rules, 47 C.F.R. §25.204(f), require earth stations operating in the 13.75-14.0 GHz band to have an antenna size of at least size 4.5 meters and operate with an EIRP between 68 and 85 dBW. GlobeCast however, proposes to use a 1.5 meter antenna and operate with a maximum EIRP of 25.44 dBW for its emissions in this
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  • item E43/44 of Schedule B, M.T. proposes to transmit in the 13.75-14.5 GHz band and receive in the 10.7-12.75 GHz band. M.T.'s proposal to use the 10.7-10.95, 11.2-11.45, 12.2-12.75, and 13.75-14.0 GHz bands are in frequency bands that are not allocated for ESV service. Furthermore, Footnote US356 of the U.S. Table of Frequency Allocations, 47 C.F.R. § 2.106, and Section 25.204(f) of the Commission's rules, 47 C.F.R. § 25.204(f), require earth stations operating in the 13.75-14.0 GHz band to have an antenna size of at least 4.5 meters in diameter and operate with an equivalent isotropic radiated power (E.I.R.P.) between 68 and 85 dBW. M.T., however, proposes to use a 0.80 meter antenna and operate with a maximum E.I.R.P. of 39
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  • of Station: Fixed Earth Stations Dismissed by Delegated Authority Nature of Service:Domestic Fixed Satellite Service, International Fixed Satellite Service An examination of the above-referenced application finds that the proposed satellites HISPASAT and Brasilsat @ 65 degrees W.L. are not within the authorized satellite arc and the proposed EIRP and EIRP density of each emission does not comply with the Section 25.204(f) of the Commission's rules. Accordingly, the above-referenced application is hereby dismissed without prejudice pursuant to Section 25.112(a)(2) of the Commission's Rules. SITE ID: 1 7007 SW 32ND STREET, DADE, MIAMI, FL LOCATION: E970335 SES-MOD-20001031-02080 COMBINED COMMUNICATIONS CORPORATION OF OKLAHOMA, INC. Application for Modification 08/01/1997 - 08/01/2007 Date Effective: 05/29/2001 Class of Station: Temporary Fixed Earth Station Grant of Authority Nature
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  • E000267 SES-T/C-20030522-00691E Application for Consent to Transfer of Control Date Effective: 06/09/2003 TO: No. of Station(s) listed:2 SES GLOBAL, S.A. Grant of Authority FROM: Current Licensee: SES Global S.A. Americom Government Services, Inc. SES Global S.A. E4243 SES-T/C-20030522-00692E Dismissal E020260 SES-LIC-20020920-01635 ESATEL Communications, Inc. APPLICATION IS DISMISSED THIS DAY FOR THE REASONS BELOW: Pursuant to the Commission's Rule 47 CFR §25.204(f), in the 13.75-14.00 GHz band, the EIRP of any emission should be at least 68 dBW and should not exceed 85 dBW. The proposed EIRP of 54.50 dBW for the emission designator 43K2G7D is substantially below the requirement. Furthermore, the Rule states that in the 13.77-13.78 segment band, the EIRP density of any emission should not exceed 71 dBW/6MHz, or
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  • Inc E030340 SES-LIC-20031126-01788P Date Effective: 02/09/2004 Class of Station: Fixed Earth Stations Grant of Authority 02/09/2004 - 02/09/2019 Application for Authority Nature of Service:Domestic Fixed Satellite Service, International Fixed Satellite Service APPLICATION IS GRANTED FOR ITS KU-BAND OPERATION AND IS DISMISSED FOR ITS PROPOSED EXTENDED KU-BAND OPERATION ON THIS DAY. THE 1.9-M ANTENNA DIAMETER DOES NOT MEET THE REQUIREMENT OF 25.204(F) RULE. Page 2 of 28 SITE ID: 1 VARIOUS LOCATION: ADVENT/MATHIS 1 1.9 meters ANTENNA ID: 1.9M 72.50 dBW DIGITAL VIDEO, VOICE, DATA 14000.0000 - 14500.0000 MHz 36M0G7W 72.50 dBW ANALOG FDM/VIDEO 14000.0000 - 14500.0000 MHz 36M0F3F Points of Communication: 1 - ALSAT - (ALSAT) 1 - INTELSAT 805 - (304.5 E.L.) 1 - INTELSAT AOR - (307.0 E.L.) 1
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  • TTY 202-418-2555. INFORMATIVE Licensee has surrendered license, per letter dated February 9, 2004. E020335 SES-LIC-20021205-02086 TELECOMMUNICATION SYSTEMS Licensee has surrendered license, per letter dated April 7, 2004. WB36 SES-MOD-20031119-01678 Telenor Satellite, Inc. As further explained in an attachment, the Commission sets aside the grant because, inter alia, the terms of the license do not conform to 47 CFR Part 25, §25.204(f) for the band 13.75-14 GHz, nor do the terms of the license reflect, as they should, an exception to the criteria in 47 CFR Part 25, §25.212(c) for routine processing. Special Temporary Authority for 30 days is granted to enable the applicant to remedy the application via amendment, or to take other steps. E874296 SES-RWL-19980310-00271 SERVICE MERCHANDISE COMPANY INC. Licensee
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  • W COM, S.A. de C.V. Grupo W COM seeks special temporary authority for 180 days to operate its currently-authorized conventional Ku-Band licensed network of 1.2 meter antennas in the 10.95-11.2 GHz, 11.45-11.7 GHz, and 13.8-14.0 GHz bands. Grupo W COM acknowledges it does not comply with footnote US356 of the Table of Frequency Allocations, 47 C.F.R. § 2.106, and Section 25.204(f) of the Commission's rules, 47 C.F.R. §25.204(f), which require earth stations operating in the 13.75-14.0 GHz band to have an antenna size of at least 4.5 meters, but states that the proposed operations will not cause harmful interference to compliant earth station operations. Points of Communication: Page 6 of 6
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  • angle. This difference is on the order of 0.2° for an earth station along the equator, and decreases for earth stations at higher latitudes. See Report of the GSO Ka-Band Blanket Licensing Industry Working Group, Conditions for Compatibility with 2'' Orbital Spacing (filed Nov. 19, 1998), an informal group to which all GSO/FSS licensees were invited. See 47 C.F.R. § 25.204; 28 GHz First Report and Order, 11 FCC Rcd. at 19005 (amending 47 C.F.R. § 25.204). See Letter from William T. Hatch of the NTIA to to Dale M. Hatfield Of the FCC, dated March 29, 2000. See Second Report of the GSO/FSS Ka-Band Licensing Industry Working Group, submitted as an ex parte comment on September 27, 1999, and made
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  • include manned flight. Therefore, we will extend the e.i.r.p. density limit across the 10 megahertz segment as requested by NTIA by adopting new footnote US357 for all FSS earth stations, which accomplishes the goals of S5.503 (WRC-2000), but protects TDRSS across the 13.77-13.78 GHz band. Accordingly, we remove footnote S5.503 from our Table of Frequency Allocations. We also modify Section 25.204(f) of our Rules to reflect these new power requirements for FSS operations in the 13.75-14.0 GHz band. We believe this limit will protect NASA TDRSS operations from different types of NGSO FSS systems and not only the SkyBridge specific design. Nevertheless, we maintain the requirements of US337 that earth stations in the FSS coordinate on a case-by-case basis with the
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  • Terrestrial radiocommunication. Any radiocommunication other than space radiocommunication or radio astronomy. (40) Terrestrial station. A station effecting terrestrial radiocommunication. (41) Wideband. See Full Transponder. 22. Amend § 25.202 by removing and reserving paragraph (a)(2) to read as follows: § 25.202 Frequencies, frequency tolerance and emission limitations. * * * * * (2) [Reserved.] * * * * * 23. In §25.204, revise paragraphs (a) and (b) to read as follows: § 25.204 Power limits. ð<ð ð0ð°ð 5ð°ð na of the earth station and measured in degrees as positive above the horizontal plane and negative below it. (b) In bands shared coequally with terrestrial radio-communication services, the equivalent isotropically radiated power transmitted in any direction towards the horizon by an earth station
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  • for normal operating conditions in Table S21.4, the ITU Radio Regulations reference those values in a footnote and in Resolution 84. And rather than present the PFD limits for fade conditions in a footnote, the ITU Radio Regulations reference those values in the main table. Our proposed approach incorporates the WRC-2000 results in a different format. Cf. 47 C.F.R. § 25.204(e) (allowing satellite Earth station licensees to increase equivalent isotropically radiated power during fade conditions). The PFD limits applied only to the 37.0-40.5 GHz portion of the band. See S21.16, Table S21-4 of the Radio Regulations, Edition of 1998, Geneva 1998. The PFD limits that WRC-2000 adopted for the Space Research Service in the 37.0-38.0 GHz band and FSS in the
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  • the chances of successfully operating two independent, co-located systems on an interference-free basis. Tempo's suggested rules include: (1) requiring that cross-polarization isolation for space station antennas conform to ITU specifications; (2) requiring DBS licensees at the same orbital position to operate their TT&C frequencies on opposite circular polarizations; (3) limiting uplink eirp to levels consistent with the requirements of Section 25.204 of the Commission's rules; and (4) maintaining the basic 0.4 degree orbital spacing between co-located satellites. No commenters opposed Tempo's suggestions, although DIRECTV questioned the clarity of Tempo's proposal to maintain 0.4 degree orbital spacing and urged that the Commission not alter the orbital spacing defined in Appendix 30 of the Radio Regulations. We will address each of Tempo's proposed
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  • and Order and Further Notice of Proposed Rulemaking, ET Docket No. 98-206, FCC 00-418, 16 FCC Rcd 4096 (2000) (Ku-band NGSO Order). By "conventional Ku-band," we mean the 11.7-12.2 GHz and 14.0-14.5 GHz bands. See Notice, FCC 00-435, 15 FCC Rcd at 25132-33 (para. 8). Ku-band NGSO Order, FCC 00-418, 16 FCC Rcd at 4241-53 (App. A, revisions to Sections 25.204 and 25.209 of the Commission's rules, 47 C.F.R. §§ 25.204, 25.209). By "conventional C-band," we mean the 3700-4200 MHz and 5925-6425 MHz bands. By "conventional Ku-band," we mean the 11.7-12.2 GHz and 14.0-14.5 GHz bands. The conventional C-band is shared with the Fixed Service, and the conventional Ku-band is not. Letter from Joseph A. Godles, Attorney for PanAmSat Corporation, to
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  • 25.157 of this Chapter after [insert effective date of this rule], authorizing operations in a frequency band for which the Commission has not adopted frequency band-specific service rules at the time the license is granted, the licensee will be required to comply with the following technical requirements, notwithstanding the frequency bands specified in these rule provisions: Sections 25.142(d), 25.143(b)(2)(ii), 25.143(b)(2)(iii), 25.204(g), 25.210(c), 25.210(d), 25.210(f), 25.210(i), 25.210(k), and 25.210(l) of this Chapter. (2) In addition to the requirements set forth in paragraph (b)(1) of this paragraph, the Commission will coordinate with the National Telecommunications and Information Administration (NTIA) regarding the operations of any licensees authorized to operate in a shared government/non-government frequency band, pursuant to the procedure set forth in Section 25.142(b)(2)(ii)
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  • in §2.1093(b), i.e., if its radiating structure(s) would be within 20 centimeters of the operator's body when the transceiver is in operation. In addition to the information required by §1.1307(b) and §2.1033(c), applicants for certification required by this section shall submit any additional equipment test data necessary to demonstrate compliance with pertinent standards for transmitter performance prescribed in §25.138, §25.202(f), §25.204, §25.209, and §25.216 and shall submit the statements required by §2.1093(c). Applicants for certification required by this section must submit evidence that the devices in question are designed for use with a satellite system that may lawfully provide service to users in the United States pursuant to an FCC license or order reserving spectrum. 3. Section 25.132 is amended by
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  • to any other satellite network that is authorized to operate in the same frequency band, or certify that the operations of its earth station shall conform to established coordination agreements between the operator(s) of the space station(s) with which the earth station is to communicate and the operator(s) of any other space station licensed to use the band. 10. Section 25.204 is amended by adding paragraph (h) and (i) to read as follows: § 25.204 Power limits. * * * * * (h) ESV transmissions in the 5925-6425 MHz (Earth-to-space) band shall not exceed an EIRP spectral density towards the radio-horizon of 17 dBW/MHz, and shall not exceed an EIRP towards the radio-horizon of 20.8 dBW. The ESV network shall shut-off
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  • With respect to earth station licensing, an application is "routine" only if it conforms to all antenna, power, coordination, radiation hazard, and FAA notification rules, and accesses only "Permitted Space Station List" satellites in the conventional C-band or Ku-band frequency bands. * * * * * § 25.202 [Amended] 16. In § 25.202, remove and reserve paragraph (a)(2). 17. In §25.204, revise paragraphs (a) and (b) to read as follows: § 25.204 Power limits. ðd" ð0ð°ð 5ð°ð sured in degrees as positive above the horizontal plane and negative below it. (b) In bands shared coequally with terrestrial radiocommunication services, the equivalent isotropically radiated power transmitted in any direction towards the horizon by an earth station operating in frequency bands above 15
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  • uplink adaptive power control to provide transmit power levels sufficient to meet the desired link performance during unfavorable weather events, while simultaneously ensuring that threshold power levels are not excessive at other times. In the 28 GHz First Report and Order, we recognized that uplink power control limits would facilitate operations in the 27.5-30.0 GHz band, and we amended Section 25.204 of our rules to require that all Ka-band FSS earth stations employ adaptive uplink power control or other methods of fade compensation. In the 18 GHz Report and Order, we adopted rules for Ka-band FSS earth stations employing uplink power control which limit transmissions during conditions of uplink fading to 20 dB above those permitted under clear-sky conditions. We seek
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  • that must indicate whether there are margin shortfalls in any other licensee's current baseline services as a result of the addition the applicant's higher power service, and if so, how the applicant intends to resolve those margin shortfalls. The NPRM also sought comment on the need for uplink adaptive power control, particularly in presence of rain fade, noting that Section 25.204(g) of our rules requires all Ka-band FSS earth stations to employ adaptive power control or other methods of rain fade compensation. Commenters recognize the need for uplink power control in the event of rain fade and cite the specification already contained in our rules as appropriate for the 17/24 GHz BSS. We realize that systems operating in the 24 GHz
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-07-86A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-07-86A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-07-86A1.txt
  • to any other satellite network that is authorized to operate in the same frequency band, or certify that the operations of its earth station shall conform to established coordination agreements between the operator(s) of the space station(s) with which the earth station is to communicate and the operator(s) of any other space station licensed to use the band. 11. Section 25.204 is amended by modifying the introduction to paragraph (a) and adding paragraph (j) to read as follows: § 25.204 Power limits. (a) In bands shared coequally with terrestrial radio communication services, the equivalent isotropically radiated power transmitted in any direction towards the horizon by an earth station, other than an ESV or a VMES, operating in frequency bands between 1
• http://wireless.fcc.gov/auctions/15/releases/fc970070.pdf http://wireless.fcc.gov/auctions/15/releases/fc970070.txt http://wireless.fcc.gov/auctions/15/releases/fc970070.wp
  • 25.154 Opposition to applications and other pleadings. 25.155 Mutually exclusive applications. 25.156 Consideration of applications. FORFEITURE, TERMINATION, AND REINSTATEMENT OF STATION AUTHORIZATION 25.160 Administrative sanctions. 25.161 Automatic termination of station authorization. 25.162 Cause for termination of interference protection. 25.163 Reinstatement. Subpart C - Technical Standards 25.201 Definitions. 25.202 Frequencies, frequency tolerance and emission limitations. 25.203 Choice of sites and frequencies. 25.204 Power limits. 25.205 Minimum angle of antenna elevation. 25.206 Station identification. 25.207 Cessation of emissions. 25.208 Power flux density limits. Federal Communications Commission FCC 97-70 78 25.209 Antenna performance standards. 25.210 Technical requirements for space stations in the Fixed-Satellite Service. 25.211 Video transmissions in the Domestic Fixed-Satellite Service. 25.212 Narrowband transmission in the Fixed-Satellite Service. 25.213 Inter-service coordination requirements for
• http://wireless.fcc.gov/auctions/53/releases/fc000418.pdf http://wireless.fcc.gov/auctions/53/releases/fc000418.txt
  • include manned flight. Therefore, we will extend the e.i.r.p. density limit across the 10 megahertz segment as requested by NTIA by adopting new footnote US357 for all FSS earth stations, which accomplishes the goals of S5.503 (WRC-2000), but protects TDRSS across the 13.77-13.78 GHz band. Accordingly, we remove footnote S5.503 from our Table of Frequency Allocations. We also modify Section 25.204(f) of our Rules to reflect these new power requirements for FSS operations in the 13.75-14.0 GHz band. We believe this limit will protect NASA TDRSS operations from different types of NGSO FSS systems and not only the SkyBridge specific design. Nevertheless, we maintain the requirements of US337 that earth stations in the FSS coordinate on a case-by-case basis with the
• http://www.fcc.gov/Bureaus/International/Notices/1998/fcc98235.pdf http://www.fcc.gov/Bureaus/International/Notices/1998/fcc98235.txt http://www.fcc.gov/Bureaus/International/Notices/1998/fcc98235.wp
  • C.F.R. § 25.209(g). The antenna performance standard for small antennas operating in the 12/14 GHz band with diameters as small as 1.2 meters starts at 1.25o instead of 1o. 85 This requirement is for networks whose coordination information was received by the ITU after May 17, 1996; use of these techniques is encouraged for other networks. 86 47 C.F.R. § 25.204. See 28 GHz First Report and Order, 11 FCC Rcd at 19005. 87 Id. 27 followed for small diameter Ku-band antennas in Section 25.209(g).84 We request comment on whether 1o is an appropriate value to facilitate licensing of small antenna diameter earth stations, or whether another less stringent value might be imposed, and at what minimum antenna diameter it might
• http://www.fcc.gov/sptf/files/IPWGFinalReport.doc http://www.fcc.gov/sptf/files/IPWGFinalReport.pdf
  • the nature and extent of incumbency and the nature of the spectrum use. For example, it may not be appropriate to use the concept for certain public safety services. Acceptable ``interference temperature'' limits could, in effect, provide implicit receiver standards, because equipment manufacturers would have the option of designing receivers to operate in ``worst case'' RF environments. 47 C.F.R. § 25.204 (g). In ATPC systems, when a receiver detects a decrease in the necessary signal strength, it sends a control signal to the transmitter to increase power. 47 C.F.R. § 25.204 (f). See Revisions to Broadcast Auxiliary Service Rules in Part 74 and Conforming Technical Rules for Broadcast Auxiliary Service, Cable Television Relay Service and Fixed Services in Parts 74, 78