FCC Web Documents citing 24.236

as compiled by hallikainen.com/FccRules on 2012 07 01

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  • U.S.C. §160. See generally Section III.A.2(b)(ii), above. In this particular proceeding, we intend to consider only those proposals directly related to our goal of promoting secondary markets. Proposals of general applicability concerning revisions to technical rules will be addressed in separate proceedings, such as in our biennial review proceedings. See, e.g., Biennial Review Part 90 Refarming Proceeding. 47 C.F.R. § 24.236. 47 C.F.R. § 22.165. See Amendment of Parts 1, 21 and 74 To Enable Multipoint Distribution Service and Instructional Television Fixed Service Licensees to Engage in Fixed Two-Way Transmissions; Request for Declaratory Ruling on the Use of Digital Modulation by Multipoint Distribution Service and Instructional Television Fixed Service Stations, MM Docket No. 97-217, Report and Order, 13 FCC Rcd 19112
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  • Report and Order, 12 FCC Rcd at 18633 (para. 68). See 47 GHz Notice, 13 FCC Rcd at 16994-97 (paras. 119-129). At a minimum, stations whose radio horizon overlaps adjacent areas should contact the relevant licensees regarding coordination of facilities. See Appendix B, Proposed Sections 27.57 and 27.65 of the Commission's Rules, 47 C.F.R. §§ 27.57, 27.65. 47 C.F.R. § 24.236. 47 C.F.R. § 26.55. 47 C.F.R. § 27.55. See Part 27 Report and Order, 12 FCC Rcd at 10864 (para. 159). 47 C.F.R. § 27.64. Cf. 47 C.F.R. § 22.352, which governs predominantly mobile operations. , supra. See Report to Congressional Committees, Defense Communications: Federal Frequency Spectrum Sale Could Impair Military Operations, General Accounting Office, GAO/NSIAD-97-131 (June 1997). Reallocation Letter
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  • are not specified in a flexible use service. See 47 C.F.R. § 22.907. Service may be provided without harmful interference in intersystem border areas if licensees, each with detailed knowledge of the particular service and technology that they have decided to use, coordinate their spectrum usage near the border areas, especially where technologies and services differ. See 47 C.F.R. §§ 24.236, § 27.55. The use of a field strength limit does not necessarily prevent interference from occurring, but does allow licensees to have some idea of the worst-case undesired field strengths that could be encountered at the border of their systems. See Upper 700 MHz First Report and Order, 15 FCC Rcd at 515, ¶ 96. Id. Id. The field strength
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  • Forbearance, Complete Detariffing for Competitive Access Providers and Competitive Exchange Carriers, Memorandum Opinion and Order and Notice of Proposed Rulemaking, 12 FCC Rcd 8596, 8608-10 (1997). 47 C.F.R. § 27.51. 47 C.F.R. § 27.52. 47 C.F.R. § 27.54. 47 C.F.R. § 27.56. 47 C.F.R. § 27.63. See 47 C.F.R. §§ 1.924, 1.1307. See supra ¶¶ 66-69. See 47 C.F.R. §§ 24.236, 27.55(a). See also 47 C.F.R. § 101.103. See 47 C.F.R. § 24.236 for PCS. See also 47 C.F.R. § 27.55 for 2.3 GHz band. See 47 C.F.R. § 101.103 for fixed microwave services. See Amendment of Parts 2, 15, and 97 of the Commission's Rules to Permit Use of Radio Frequencies Above 40 GHz for New Radio Applications, Memorandum Opinion
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  • WT Docket No. 02-8, Report and Order, 17 FCC Rcd 9980, 9991 ¶ 18 (2002) (27 MHz Report and Order). 47 C.F.R. § 27.15(b)(1). 47 C.F.R. § 27.15(c)(1)(2); see also 47 C.F.R. § 1.2111. See 47 C.F.R. Part 1, Subpart F. 47 C.F.R. Part 20; see also 47 C.F.R. § 27.3(g). 47 C.F.R. Part 101. See, e.g., 47 C.F.R. §§ 24.236, 24.237 (broadband PCS). These provisions provide flexibility for licensees to employ other measures to limit or prevent interference , such as use of robust technologies, partitioning the use of frequencies, taking advantage of terrain shielding and other propagation effects, and use of directional antennas. See, e.g., 47 C.F.R. § 27.55 (2305-2320, 746-764 and 776-794 MHz bands), § 101.509 (24 GHz
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  • make and model and the antenna height above ground and, if known, the adjacent channel D/U ratio that can be tolerated. See Coalition Proposal at 35-36. Examples of services where service areas are defined exclusively on the basis of signal strength limits at geographic borders include the lower 700 MHz band (47 C.F.R. § 27.55(a)(2)), broadband PCS (47 C.F.R. § 24.236), Part 27 services in the 2305-2320 and 2345-2360 MHz bands (47 C.F.R. § 27.55(a)(1)), and Part 27 services in the 1390-1395 and 1432-1435 MHz bands (47 C.F.R. § 27.55(a) (3)). See MDS R&O, 10 FCC Rcd at 9608-09; see also Gulf Notice, 17 FCC Rcd at 8448 ¶ 7. Rand McNally defined 487 BTAs in the 1992 Commercial Atlas and
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  • border. Under this approach, licensees operating on the same spectrum in adjacent areas would be required to coordinate the location of their stations. We note that a 40 dB(V/m field strength limit is used in the 700 MHz services, and a 47 dB(V/m field strength limit is used in the Broadband PCS, AWS, and WCS services. See 47 C.F.R. §§ 24.236 and 27.55. See infra note 218. See 800 MHz Report and Order at ¶ 263, n.631. See infra para. 106. That is, if base stations are prohibited from the 1915-1920 MHz band, there would be no possibility of ``base-to-base'' interference occurring to base stations receiving in spectrum below 1915 MHz. Section 24.238(a) of our rules requires emissions in the PCS
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  • 15 FCC Rcd. 476, 514-515 ¶¶ 94-97 (2000), modified by errata, 15 FCC Rcd. 8634 (2000), 15 FCC Rcd. 25495 (2000). We note that a 40 dB (V/m field strength limit is used in the 700 MHz services, and a 47 dB (V/m field strength limit is used in the Broadband PCS, AWS, and WCS services. See 47 C.F.R. §§ 24.236 and 27.55. In those circumstances, base and mobile stations operated in separate frequency bands. In this instance, we are concerned about mobiles communicating with base stations in their own region, even though the mobiles are physically located outside their region. . See AWS-1 Service Rules Report and Order, 18 FCC Rcd at 25202 ¶ 103. As noted above, we recently
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  • Dealing with strong-signal interference There is another class of interference that can occur between licensees operating in adjacent bands in the same area that is not addressed by limits on transmitter spill-over. It occurs because receivers do not perfectly filter out strong signals in adjacent bands, and it would be a problem 61 Varian (1992), pp. 432-439. 62 47CFR (2001), §24.236 and 24.238, respectively. 46 even if transmitter spill-over into the receiver's band were reduced to zero.63 For a receiver with a given filtering capability, the likelihood of this kind of interference increases as the signal from the interfering transmitter becomes stronger relative to the desired signal being received. This can occur under one or a combination of the following conditions:
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  • U.S.C. §160. See generally Section III.A.2(b)(ii), above. In this particular proceeding, we intend to consider only those proposals directly related to our goal of promoting secondary markets. Proposals of general applicability concerning revisions to technical rules will be addressed in separate proceedings, such as in our biennial review proceedings. See, e.g., Biennial Review Part 90 Refarming Proceeding. 47 C.F.R. § 24.236. 47 C.F.R. § 22.165. See Amendment of Parts 1, 21 and 74 To Enable Multipoint Distribution Service and Instructional Television Fixed Service Licensees to Engage in Fixed Two-Way Transmissions; Request for Declaratory Ruling on the Use of Digital Modulation by Multipoint Distribution Service and Instructional Television Fixed Service Stations, MM Docket No. 97-217, Report and Order, 13 FCC Rcd 19112
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  • are not specified in a flexible use service. See 47 C.F.R. § 22.907. Service may be provided without harmful interference in intersystem border areas if licensees, each with detailed knowledge of the particular service and technology that they have decided to use, coordinate their spectrum usage near the border areas, especially where technologies and services differ. See 47 C.F.R. §§ 24.236, § 27.55. The use of a field strength limit does not necessarily prevent interference from occurring, but does allow licensees to have some idea of the worst-case undesired field strengths that could be encountered at the border of their systems. See Upper 700 MHz First Report and Order, 15 FCC Rcd at 515, ¶ 96. Id. Id. The field strength
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  • Forbearance, Complete Detariffing for Competitive Access Providers and Competitive Exchange Carriers, Memorandum Opinion and Order and Notice of Proposed Rulemaking, 12 FCC Rcd 8596, 8608-10 (1997). 47 C.F.R. § 27.51. 47 C.F.R. § 27.52. 47 C.F.R. § 27.54. 47 C.F.R. § 27.56. 47 C.F.R. § 27.63. See 47 C.F.R. §§ 1.924, 1.1307. See supra ¶¶ 66-69. See 47 C.F.R. §§ 24.236, 27.55(a). See also 47 C.F.R. § 101.103. See 47 C.F.R. § 24.236 for PCS. See also 47 C.F.R. § 27.55 for 2.3 GHz band. See 47 C.F.R. § 101.103 for fixed microwave services. See Amendment of Parts 2, 15, and 97 of the Commission's Rules to Permit Use of Radio Frequencies Above 40 GHz for New Radio Applications, Memorandum Opinion
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  • WT Docket No. 02-8, Report and Order, 17 FCC Rcd 9980, 9991 ¶ 18 (2002) (27 MHz Report and Order). 47 C.F.R. § 27.15(b)(1). 47 C.F.R. § 27.15(c)(1)(2); see also 47 C.F.R. § 1.2111. See 47 C.F.R. Part 1, Subpart F. 47 C.F.R. Part 20; see also 47 C.F.R. § 27.3(g). 47 C.F.R. Part 101. See, e.g., 47 C.F.R. §§ 24.236, 24.237 (broadband PCS). These provisions provide flexibility for licensees to employ other measures to limit or prevent interference , such as use of robust technologies, partitioning the use of frequencies, taking advantage of terrain shielding and other propagation effects, and use of directional antennas. See, e.g., 47 C.F.R. § 27.55 (2305-2320, 746-764 and 776-794 MHz bands), § 101.509 (24 GHz
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  • 2-3. TDC comments of 4/25/01 at pg. 79. TDC comments of 4/25/01 at pg. 83-84. TDC comments of 4/25/01 at pg. 85. XSI comments of 5/10/01 at pg. 4. XSI comments of 5/10/01 at pg. 5-6. XSI comments of 5/10/01 at pg. 6. XSI comments of 5/10/01 at pg. 7-8. XSI comments of 5/10/01 at pg. 11. 47 C.F.R. § 24.236 states that the median field strength at any location on the border of the PCS service area shall not exceed 47 dBuV/m. As this is the signal level established in the rules as what is necessary to prevent interference to an adjacent license, it appears likely that PCS systems are designed to operate at this level or higher. For a
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  • licensee does not offer service to that particular location, then the level of service the licensee could provided in that area could be restricted unnecessarily. We noted that a 40 dB(V/m field strength limit is used in the 700 MHz services, and that a 47 dB(V/m field strength limit is used in Broadband PCS and WCS. See 47 C.F.R. §§ 24.236 and 27.55. See CTIA Comments at 13-14; Motorola Comments at 10. Ericsson Comments at 7. No commenters indicated a concern that the boundary limit approach would lead to anti-competitive behavior among licensees, and we are confident that under this approach such behavior will not occur. 47 U.S.C. § 337(d)(1). Ericsson Comments at 7. could be used in this calculation. Licensees
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  • make and model and the antenna height above ground and, if known, the adjacent channel D/U ratio that can be tolerated. See Coalition Proposal at 35-36. Examples of services where service areas are defined exclusively on the basis of signal strength limits at geographic borders include the lower 700 MHz band (47 C.F.R. § 27.55(a)(2)), broadband PCS (47 C.F.R. § 24.236), Part 27 services in the 2305-2320 and 2345-2360 MHz bands (47 C.F.R. § 27.55(a)(1)), and Part 27 services in the 1390-1395 and 1432-1435 MHz bands (47 C.F.R. § 27.55(a) (3)). See MDS R&O, 10 FCC Rcd at 9608-09; see also Gulf Notice, 17 FCC Rcd at 8448 ¶ 7. Rand McNally defined 487 BTAs in the 1992 Commercial Atlas and
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  • make and model and the antenna height above ground and, if known, the adjacent channel D/U ratio that can be tolerated. See Coalition Proposal at 35-36. Examples of services where service areas are defined exclusively on the basis of signal strength limits at geographic borders include the lower 700 MHz band (47 C.F.R. § 27.55(a)(2)), broadband PCS (47 C.F.R. § 24.236), Part 27 services in the 2305-2320 and 2345-2360 MHz bands (47 C.F.R. § 27.55(a)(1)), and Part 27 services in the 1390-1395 and 1432-1435 MHz bands (47 C.F.R. § 27.55(a) (3)). See MDS R&O, 10 FCC Rcd at 9608-09; see also Gulf Notice, 17 FCC Rcd at 8448 ¶ 7. Rand McNally defined 487 BTAs in the 1992 Commercial Atlas and
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  • at iii, 3-4, 9. Rural Commenters Reply Comments at 4. See Joint Comments of Stanford and Northeastern Universities at 20. See SCETV Comments at 1, 6. Examples of services where service areas are defined exclusively on the basis of signal strength limits at geographic borders include the lower 700 MHz band (47 C.F.R. § 27.55(a)(2)), broadband PCS (47 C.F.R. § 24.236), Part 27 services in the 2305-2320 and 2345-2360 MHz bands (47 C.F.R. § 27.55(a)(1)), and Part 27 services in the 1390-1395 and 1432-1435 MHz bands (47 C.F.R. § 27.55(a) (3)). See IP Wireless Comments at 11. See AHMLC Comments at 16; IMLC Comments at 12. See Coalition Comments at 59-60. See ComSpec Comments at 2. See Coalition Comments at 61.
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  • up to 300 meters HAAT; See Sec. 24.53 for HAAT calculation method. Base station antenna heights may exceed 300 meters with a corresponding reduction in power; see Table 2 of this section. In no case may the peak output power of a base station transmitter exceed 200 watts. The service area boundary limit and microwave protection criteria specified in Sec. 24.236 and Sec. 24.237 apply. Operation under this paragraph must be coordinated in advance with all PCS licensees within 120 kilometers (75 miles) of the base station and is limited to base stations located more than 120 kilometers (75 miles) from the Canadian border and more than 75 kilometers (45 miles) from the Mexican border. Table 2--Reduced Power for Base Station
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  • border. Under this approach, licensees operating on the same spectrum in adjacent areas would be required to coordinate the location of their stations. We note that a 40 dB(V/m field strength limit is used in the 700 MHz services, and a 47 dB(V/m field strength limit is used in the Broadband PCS, AWS, and WCS services. See 47 C.F.R. §§ 24.236 and 27.55. See infra note 218. See 800 MHz Report and Order at ¶ 263, n.631. See infra para. 106. That is, if base stations are prohibited from the 1915-1920 MHz band, there would be no possibility of ``base-to-base'' interference occurring to base stations receiving in spectrum below 1915 MHz. Section 24.238(a) of our rules requires emissions in the PCS
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  • Power and antenna height limits. tts peak equivalent isotropically radiated power (EIRP) with an antenna height up to 300 meters HAAT; See Sec. 24.53 for HAAT calculation method. Base station antenna heights may exceed 300 meters with a corresponding reduction in power; see Table 2 of this section. The service area boundary limit and microwave protection criteria specified in Sec. 24.236 and Sec. 24.237 apply. Operation under this paragraph must be coordinated in advance with all PCS licensees within 120 kilometers (75 miles) of the base station and is limited to base stations located more than 120 kilometers (75 miles) from the Canadian border and more than 75 kilometers (45 miles) from the Mexican border. Table 2--Reduced Power for Base Station
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  • Power and antenna height limits. tts peak equivalent isotropically radiated power (EIRP) with an antenna height up to 300 meters HAAT; See Sec. 24.53 for HAAT calculation method. Base station antenna heights may exceed 300 meters with a corresponding reduction in power; see Table 2 of this section. The service area boundary limit and microwave protection criteria specified in Sec. 24.236 and Sec. 24.237 apply. Operation under this paragraph must be coordinated in advance with all PCS licensees within 120 kilometers (75 miles) of the base station and is limited to base stations located more than 120 kilometers (75 miles) from the Canadian border and more than 75 kilometers (45 miles) from the Mexican border. Table 2--Reduced Power for Base Station
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  • 15 FCC Rcd. 476, 514-515 ¶¶ 94-97 (2000), modified by errata, 15 FCC Rcd. 8634 (2000), 15 FCC Rcd. 25495 (2000). We note that a 40 dB (V/m field strength limit is used in the 700 MHz services, and a 47 dB (V/m field strength limit is used in the Broadband PCS, AWS, and WCS services. See 47 C.F.R. §§ 24.236 and 27.55. In those circumstances, base and mobile stations operated in separate frequency bands. In this instance, we are concerned about mobiles communicating with base stations in their own region, even though the mobiles are physically located outside their region. . See AWS-1 Service Rules Report and Order, 18 FCC Rcd at 25202 ¶ 103. As noted above, we recently
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  • greater than 1 MHz are limited to 3280 watts/MHz equivalent isotropically radiated power (EIRP) with an antenna height up to 300 meters HAAT. (3) Base station antenna heights may exceed 300 meters HAAT with a corresponding reduction in power; see Tables 3 and 4 of this section. (4) The service area boundary limit and microwave protection criteria specified in Sec. 24.236 and Sec. 24.237 apply. (5) Operation under this paragraph (b) at power limits greater than permitted under paragraph (a) of this section must be coordinated in advance with all broadband PCS licensees authorized to operate on adjacent frequency blocks within 120 kilometers (75 miles) of the base station and is limited to base stations located more than 120 kilometers (75
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  • the Stage I auction). 47 C.F.R. § 22.911. boundary disputes among PCS licensees, for example, which are subject to a field strength limit of 47 dBµV/m at their respective license boundaries. Moreover, as PCS rules also permit negotiated departures from the applicable limit, PCS licensees may be operating with field strength limits that exceed 47 dBµV/m. See 47 C.F.R. § 24.236. While licensees would be free under our proposal to negotiate a different field strength limit from the limit that is ultimately adopted in this proceeding, we emphasize that Commission rules do not allow licensees to agree to transmit their signals at a power level that is higher than the applicable power limit set forth in the rules. Traffic capture has
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  • page) 147There have been very few boundary disputes among PCS licensees, for example, which are subject to a field strength limit of 47 dB V/m at their respective license boundaries. Moreover, as PCS rules also permit negotiated departures from the applicable limit, PCS licensees may be operating with field strength limits that exceed 47 dB V/m. 148See 47 C.F.R. § 24.236. 149While licensees would be free under our proposal to negotiate a different field strength limit from the limit that is ultimately adopted in this proceeding, we emphasizethat Commission rules do not allowlicensees to agree to transmit their signals at a power level that is higher than the applicable power limit set forth in the rules. 150Traffic capture has not been
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  • are not specified in a flexible use service. See 47 C.F.R. § 22.907. Service may be provided without harmful interference in intersystem border areas if licensees, each with detailed knowledge of the particular service and technology that they have decided to use, coordinate their spectrum usage near the border areas, especially where technologies and services differ. See 47 C.F.R. §§ 24.236, § 27.55. The use of a field strength limit does not necessarily prevent interference from occurring, but does allow licensees to have some idea of the worst-case undesired field strengths that could be encountered at the border of their systems. See Upper 700 MHz First Report and Order, 15 FCC Rcd at 515, ¶ 96. Id. Id. The field strength
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  • broad range of technologies may share this spectrum, and the nature of the services and technologies can affect the potential for interference between licensees using the same spectrum in adjacent service areas. We are particularly interested in potential interference issues should the range of uses extend to full power broadcast service. Federal Communications Commission FCC 99-97 110 See, e.g., Sections 24.236 and 24.237 of the Commission's Rules, 47 C.F.R. §§ 24.236, 24.237 (Broadband PCS). 111 LMDS Second Report and Order; 39 GHz Report and Order. 112 39 GHz Report and Order, 12 FCC Rcd at 18633 (para. 68). 113 47 U.S.C. § 337(d)(1). PAGE 28 59. We have permitted flexibility in services and technologies in other frequency bands. Examples include cellular
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  • U.S.C. §160. See generally Section III.A.2(b)(ii), above. In this particular proceeding, we intend to consider only those proposals directly related to our goal of promoting secondary markets. Proposals of general applicability concerning revisions to technical rules will be addressed in separate proceedings, such as in our biennial review proceedings. See, e.g., Biennial Review Part 90 Refarming Proceeding. 47 C.F.R. § 24.236. 47 C.F.R. § 22.165. See Amendment of Parts 1, 21 and 74 To Enable Multipoint Distribution Service and Instructional Television Fixed Service Licensees to Engage in Fixed Two-Way Transmissions; Request for Declaratory Ruling on the Use of Digital Modulation by Multipoint Distribution Service and Instructional Television Fixed Service Stations, MM Docket No. 97-217, Report and Order, 13 FCC Rcd 19112
• http://wireless.fcc.gov/auctions/00c/releases/fc000063.doc http://wireless.fcc.gov/auctions/00c/releases/fc000063.pdf
  • Report and Order, 12 FCC Rcd at 18633 (para. 68). See 47 GHz Notice, 13 FCC Rcd at 16994-97 (paras. 119-129). At a minimum, stations whose radio horizon overlaps adjacent areas should contact the relevant licensees regarding coordination of facilities. See Appendix B, Proposed Sections 27.57 and 27.65 of the Commission's Rules, 47 C.F.R. §§ 27.57, 27.65. 47 C.F.R. § 24.236. 47 C.F.R. § 26.55. 47 C.F.R. § 27.55. See Part 27 Report and Order, 12 FCC Rcd at 10864 (para. 159). 47 C.F.R. § 27.64. Cf. 47 C.F.R. § 22.352, which governs predominantly mobile operations. , supra. See Report to Congressional Committees, Defense Communications: Federal Frequency Spectrum Sale Could Impair Military Operations, General Accounting Office, GAO/NSIAD-97-131 (June 1997). Reallocation Letter
• http://wireless.fcc.gov/auctions/11/releases/bip_def.pdf
  • up to 300 meters HAAT. See § 24.53 for HAAT calculation method. Base station antenna heights may exceed 300 meters with a corresponding reduction in power; see Table 1 of this section. In no case may the peak output power of a base station transmitter exceed 100 watts. The service area boundary limit and microwave protection criteria specified in Section 24.236 and Section 24.237 apply. must employ means to limit the using instrumentation calibrated in terms of an rms-equivalent voltage. The measurement results shall be properly adjusted for any instrument limitations, such as detector response times, limited resolution bandwidth capability when compared to the emission bandwidth, sensitivity, etc., so as to obtain a true peak measurement for the emission in question
• http://wireless.fcc.gov/auctions/18/releases/220_e.pdf
  • MHz licensees, and thus we will require Phase II licensees to provide 10 dB protection to the predicted 38 dBu service contour of the base stations of Phase I licensees. 7. Field Strength Limit at EA and Regional Border Federal Communications Commission FCC 97-57 220 MHz Report and Order, 6 FCC Rcd at 2371 (para. 115). 332 See, e.g., Sections 24.236 and 90.671 of the Commission's Rules, 47 C.F.R. §§ 24.236, 90.671. 333 In calculating the predicted 38 dBuV/m contour resulting from the transmissions of their base stations, 334 licensees will use the F(50,50) field strength chart for Channels 7-13 in Section 73.699 of our Rules (Figure 10), with a 9 dB correction factor for antenna height differential. See 47 C.F.R.
• http://wireless.fcc.gov/auctions/18/releases/fc970057.pdf http://wireless.fcc.gov/auctions/18/releases/fc970057.txt http://wireless.fcc.gov/auctions/18/releases/fc970057.wp
  • their authorized Federal Communications Commission FCC 97-57 Id. See also 900 MHz SMR Second Report and Order, 10 FCC Rcd at 6899-6900 (para. 44), where we 331 decided to continue to base interference protection on the provision of protection to the 40 dBu contour. 220 MHz Report and Order, 6 FCC Rcd at 2371 (para. 115). 332 See, e.g., Sections 24.236 and 90.671 of the Commission's Rules, 47 C.F.R. §§ 24.236, 90.671. 333 In calculating the predicted 38 dBuV/m contour resulting from the transmissions of their base stations, 334 licensees will use the F(50,50) field strength chart for Channels 7-13 in Section 73.699 of our Rules (Figure 10), with a 9 dB correction factor for antenna height differential. See 47 C.F.R.
• http://wireless.fcc.gov/auctions/22/releases/pcsbipg.pdf
  • up to 300 meters HAAT. See § 24.53 for HAAT calculation method. Base station antenna heights may exceed 300 meters with a corresponding reduction in power; see Table 1 of this section. In no case may the peak output power of a base station transmitter exceed 100 watts. The service area boundary limit and microwave protection criteria specified in Section 24.236 and Section 24.237 apply. -------------------------------------------------------------------------------------------------------- Table 1.--Reduced Power for Base Station Antenna Heights Over 300 Meters HAAT in meters Maximum e.i.r.p. (watts) -------------------------------------------------------------------------------------------------------- < 300 ........................................................................................... 1,640 < 500 ........................................................................................... 1,070 < 1,000 ......................................................................................... 490 < 1,500 ......................................................................................... 270 < 2,000 ......................................................................................... 160 -------------------------------------------------------------------------------------------------------- (b) Mobile/portable stations are limited to 2 watts e.i.r.p. peak power and the equipment must employ
• http://wireless.fcc.gov/auctions/46/releases/fc020015.pdf http://wireless.fcc.gov/auctions/46/releases/fc020015.txt
  • a satisfactory means of controlling harmful interference between systems, although, on balance, there may be reasons to prefer 235 47 C.F.R. § 27.51. 236 47 C.F.R. § 27.52. 237 47 C.F.R. § 27.54. 238 47 C.F.R. § 27.56. 239 47 C.F.R. § 27.63. 240 See 47 C.F.R. §§ 1.924, 1.1307. 241 See supra ¶¶ 66-69. 242 See 47 C.F.R. §§ 24.236, 27.55(a). See also 47 C.F.R. § 101.103. 243 See 47 C.F.R. § 24.236 for PCS. See also 47 C.F.R. § 27.55 for 2.3 GHz band. 244 See 47 C.F.R. § 101.103 for fixed microwave services. Federal Communications Commission FCC 02-15 40 one method over the other. For example, a general coordination requirement may minimize the potential for interference to coordinated
• http://wireless.fcc.gov/auctions/46/releases/fc020152.pdf http://wireless.fcc.gov/auctions/46/releases/fc020152.txt
  • in these bands, we will also allow licensees in adjacent areas to negotiate a different field strength limit. There will be no need to impose a field strength limit at the 390 See Service Rules Notice, 17 FCC Rcd at 2538-39 ¶¶ 98-104. 391 Id. at ¶ 98. 392 Id. 393 Id. at ¶ 99. 394 See 47 C.F.R. § 24.236 (for PCS); see also 47 C.F.R. § 27.55 (2.3 GHz band). 395 See 47 C.F.R. § 101.103 for fixed microwave services. 396 Id. 397 ArrayComm Comments at 21-22; AeroAstro Comments at 8. 398 ArrayComm Comments at 22. 399 AeroAstro Comments at 8. 400 47 C.F.R. § 24.236. 401 47 C.F.R. § 27.55(a). Federal Communications Commission FCC 02-152 52 border for
• http://wireless.fcc.gov/auctions/conferences/combin2003/papers/masterevanjohn.pdf
  • Dealing with strong-signal interference There is another class of interference that can occur between licensees operating in adjacent bands in the same area that is not addressed by limits on transmitter spill-over. It occurs because receivers do not perfectly filter out strong signals in adjacent bands, and it would be a problem 61 Varian (1992), pp. 432-439. 62 47CFR (2001), §24.236 and 24.238, respectively. 46 even if transmitter spill-over into the receiver's band were reduced to zero.63 For a receiver with a given filtering capability, the likelihood of this kind of interference increases as the signal from the interfering transmitter becomes stronger relative to the desired signal being received. This can occur under one or a combination of the following conditions:
• http://www.fcc.gov/Bureaus/Engineering_Technology/Notices/2001/fcc01091.doc http://www.fcc.gov/Bureaus/Engineering_Technology/Notices/2001/fcc01091.pdf http://www.fcc.gov/Bureaus/Engineering_Technology/Notices/2001/fcc01091.txt
  • are not specified in a flexible use service. See 47 C.F.R. § 22.907. Service may be provided without harmful interference in intersystem border areas if licensees, each with detailed knowledge of the particular service and technology that they have decided to use, coordinate their spectrum usage near the border areas, especially where technologies and services differ. See 47 C.F.R. §§ 24.236, § 27.55. The use of a field strength limit does not necessarily prevent interference from occurring, but does allow licensees to have some idea of the worst-case undesired field strengths that could be encountered at the border of their systems. See Upper 700 MHz First Report and Order, 15 FCC Rcd at 515, ¶ 96. Id. Id. The field strength
• http://www.fcc.gov/Bureaus/Engineering_Technology/Orders/2000/fcc00363.doc
  • comments at 5; SR Telecom at pages iii and 8-9; Nortel comments at iii, 10, 12-14; AT&T reply comments at 5; Lockheed comments at 4. See 47 C.F.R. §§ 27.51, 27.54, 27.56, 27.57, 27.59, 27.61, 27.63. See also Part 27 Report and Order, 12 FCC Rcd at 10848-65 (¶¶ 123-161). See 47 C.F.R. § 27.57. See, e.g., 47 C.F.R. §§ 24.236, 24.237 (Broadband PCS), 47 C.F.R. § 21.902(b)(5) (Multipoint Distribution Service), and 47 C.F.R. § 27.55 (WCS). See LMDS Second Report and Order; 39 GHz Report and Order. See 47 C.F.R. § 101.103. Id. See LMDS Second Report and Order; 39 GHz Report and Order. At a minimum, stations whose radio horizon overlaps adjacent areas should contact relevant licensees regarding coordination
• http://www.fcc.gov/Bureaus/Wireless/Notices/1999/fcc99097.pdf http://www.fcc.gov/Bureaus/Wireless/Notices/1999/fcc99097.txt http://www.fcc.gov/Bureaus/Wireless/Notices/1999/fcc99097.wp
  • broad range of technologies may share this spectrum, and the nature of the services and technologies can affect the potential for interference between licensees using the same spectrum in adjacent service areas. We are particularly interested in potential interference issues should the range of uses extend to full power broadcast service. Federal Communications Commission FCC 99-97 110 See, e.g., Sections 24.236 and 24.237 of the Commission's Rules, 47 C.F.R. §§ 24.236, 24.237 (Broadband PCS). 111 LMDS Second Report and Order; 39 GHz Report and Order. 112 39 GHz Report and Order, 12 FCC Rcd at 18633 (para. 68). 113 47 U.S.C. § 337(d)(1). PAGE 28 59. We have permitted flexibility in services and technologies in other frequency bands. Examples include cellular
• http://www.fcc.gov/Bureaus/Wireless/Notices/2000/fcc00063.doc
  • Report and Order, 12 FCC Rcd at 18633 (para. 68). See 47 GHz Notice, 13 FCC Rcd at 16994-97 (paras. 119-129). At a minimum, stations whose radio horizon overlaps adjacent areas should contact the relevant licensees regarding coordination of facilities. See Appendix B, Proposed Sections 27.57 and 27.65 of the Commission's Rules, 47 C.F.R. §§ 27.57, 27.65. 47 C.F.R. § 24.236. 47 C.F.R. § 26.55. 47 C.F.R. § 27.55. See Part 27 Report and Order, 12 FCC Rcd at 10864 (para. 159). 47 C.F.R. § 27.64. Cf. 47 C.F.R. § 22.352, which governs predominantly mobile operations. , supra. See Report to Congressional Committees, Defense Communications: Federal Frequency Spectrum Sale Could Impair Military Operations, General Accounting Office, GAO/NSIAD-97-131 (June 1997). Reallocation Letter
• http://www.fcc.gov/Bureaus/Wireless/Notices/2000/fcc00402.doc http://www.fcc.gov/Bureaus/Wireless/Notices/2000/fcc00402.pdf http://www.fcc.gov/Bureaus/Wireless/Notices/2000/fcc00402.txt
  • U.S.C. §160. See generally Section III.A.2(b)(ii), above. In this particular proceeding, we intend to consider only those proposals directly related to our goal of promoting secondary markets. Proposals of general applicability concerning revisions to technical rules will be addressed in separate proceedings, such as in our biennial review proceedings. See, e.g., Biennial Review Part 90 Refarming Proceeding. 47 C.F.R. § 24.236. 47 C.F.R. § 22.165. See Amendment of Parts 1, 21 and 74 To Enable Multipoint Distribution Service and Instructional Television Fixed Service Licensees to Engage in Fixed Two-Way Transmissions; Request for Declaratory Ruling on the Use of Digital Modulation by Multipoint Distribution Service and Instructional Television Fixed Service Stations, MM Docket No. 97-217, Report and Order, 13 FCC Rcd 19112