FCC Web Documents citing 74.641

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

• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-01-92A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-01-92A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-01-92A1.txt
  • C/I protection ratios. (i) Co-channel interference: For both sideband and carrier-beat, (applicable to all bands), the previously authorized system shall be afforded a carrier to interfering signal protection ratio of at least 90 dB. (ii) Adjacent channel interference: The existing or previously authorized system shall be afforded a carrier to interfering signal protection ratio of at least 56 dB. Section 74.641 is proposed to be amended by revising the introductory text of paragraph (a), removing the line for 31.0 to 31.3 and footnotes 2 and 3 from the table in paragraph (a)(1), removing the second sentence of paragraph (a)(5), and revising the introductory text of paragraph (b) to read as follows: § 74.641 Antenna systems. (a) For fixed stations operating above
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-298A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-298A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-298A1.txt
  • commenters to identify other rule changes that would benefit the BAS. In this regard, MRC requests that periscope antenna systems be prohibited from BAS, as they are in other services, because periscope antenna sidelobe rejection is poor and unpredictable, and can cause interference to both satellite and terrestrial systems. Discussion. The existing provisions that accommodate new periscope antennas in Section 74.641 and 78.105 do so only on the condition that applicants make a persuasive showing that no frequency conflicts exist in the area of intended operation. This constraint ensures that new periscope antennas will not cause unacceptable interference to terrestrial or satellite users. We therefore decline to limit flexibility in BAS antenna selection at this time. B. BAS Service Rules (Part
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-15A4.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-15A4.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-15A4.txt
  • 31, 1669, as applicable, indefinitely. See 47 C.F.R § 94.61(b)(4) (1995). Note that 47 C.F.R. § 94.61(b)(4) (Oct. 1, 1995) states that grandfathered temporary fixed licensees are required to notify directly each RDSS and MSS licensees concerning present and proposed locations of operations. SBE Comments at 10. Globalstar May 29, 2002 Ex Parte Letter at 3. See 47 C.F.R. § 74.641. The D/U ratio is taken from on SBE's Ex Parte comments filed in ET docket 98-142, August 7, 2001. WaveLAN Technical Bulletin 003/A, Lucent Technologies, (Nov. 1998). SBE Comments at 10. See Interim Report on the Spectrum Study of the 2500-2690 MHz Band, supra, at A60 n.2. Typical out-of-band EIRP for an IS-95 system, the alternative CDMA2000 mentioned by Globalstar
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-15A4_Erratum.doc
  • 31, 1669, as applicable, indefinitely. See 47 C.F.R § 94.61(b)(4) (1995). Note that 47 C.F.R. § 94.61(b)(4) (Oct. 1, 1995) states that grandfathered temporary fixed licensees are required to notify directly each RDSS and MSS licensees concerning present and proposed locations of operations. SBE Comments at 10. Globalstar May 29, 2002 Ex Parte Letter at 3. See 47 C.F.R. § 74.641. The D/U ratio is taken from on SBE's Ex Parte comments filed in ET docket 98-142, August 7, 2001. WaveLAN Technical Bulletin 003/A, Lucent Technologies, (Nov. 1998). SBE Comments at 10. See Interim Report on the Spectrum Study of the 2500-2690 MHz Band, supra, at A60 n.2. Typical out-of-band EIRP for an IS-95 system, the alternative CDMA2000 mentioned by Globalstar
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-289A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-289A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-289A1.txt
  • of light, 3.00 x 108 meters/second, by the frequency of the emission in Hertz. It should be noted that free space propagation provides a conservative estimate of the attenuation of the emission and that it is likely that the emission levels from an unlicensed device would attenuate more rapidly with distance than shown by these calculations. See 47 C.F.R. §§ 74.641 and 101.115. We used the lower values for the purpose of our illustrative analysis herein. The signal level from the unlicensed device that is received by the fixed receiver, SU, relative to the signal level of the desired signal, SD, equals the S/I which must exceed 30 to 50 dB, i.e., SD(dBm) - SU(dBm) = 30 to 50 dB. It