FCC Web Documents citing 15.515

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

• http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-02-2786A2.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-02-2786A2.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-02-2786A2.txt
  • -41.3 Additional Attenuation Required (dB) 34.0 Thus, the average emission limit applicable indoor UWB devices in the 960-1610 MHz frequency range is an equivalent isotropic radiated power (EIRP) of -75.3 dBm/MHz. This limit is applicable in the 960-1610 MHz band to the following UWB applications: Indoor UWB Applications (Section 15.517), Handheld UWB Applications (Section 15.519), and Vehicular Radar Systems (Section 15.515 ). In this measurement effort, the GPS interference susceptibility threshold, -117.5 dBm/MHz, is used as a basis for comparison in both the ambient and spurious emissions measurements. A display line is used to depict this limit on the spectrum analyzer plots included in this report. For the ambient emission measurements, the display line at -117.5 dBm/MHz is used as the
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-48A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-48A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-02-48A1.txt
  • 35 dB below the Part 15 general emission limits by January 1, 2014. Since we expect vehicular radar to become as essential to passenger safety as air bags for motor vehicles, the greater number of vehicles using these systems could pose an increased risk to terrestrial passive sensing by satellites. Therefore, we are adopting the additional emission requirements. See Section 15.515 in Appendix D for the specific provisions for vehicular radars. Indoor UWB Systems. Devices operating under this category must demonstrate that the system units will fail to operate if they are removed from the indoor environment. One acceptable procedure may be to show that the transmitting unit requires AC power to function. Based on the concerns expressed by NTIA and
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-33A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-33A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-33A1.txt
  • included in the press package along with the News Release of February 14, 2002, announcing the adoption of the R&O unintentionally did not reflect the emission limits below 960 MHz. The UWB emission limits below 960 MHz are the Part 15 general emission limits contained in 47 C.F.R. § 15.209, as correctly stated in 47 C.F.R. §§ 15.509(d), 15.511(d), 15.513(d), 15.515(d), 15.517(c), and 15.519(c). Accordingly, no change to our regulations is required to implement this clarification. Vehicular radar systems in the 22-29 GHz band The UWB regulations permit the operation of vehicular radar systems in the 22-29 GHz band. UWB vehicular radar systems are required to operate at all times with a minimum 500 MHz bandwidth and may employ any modulation
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-04-285A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-04-285A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-04-285A1.txt
  • The provisions of Section 15.31(c) of this part continue to apply to transmitters that employ swept frequency modulation. (4) The -10 dB bandwidth is based on measurement using a peak detector, a 1 MHz resolution bandwidth, and a video bandwidth greater than or equal to the resolution bandwidth. (5) Alternative measurement procedures may be considered by the Commission. 6. Section 15.515 is amended by adding a new paragraph (g), to read as follows: Section 15.515 Technical requirements for vehicular radar systems. * * * * * (g) The emission levels from devices operating under the provisions of this section that employ gated transmissions may be measured with the gating active. Measurements made in this manner shall be repeated over multiple sweeps
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-151A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-151A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-151A1.txt
  • that devices using stepped frequency, frequency hopping or swept frequency modulation formats would comply with the fractional bandwidth or minimum bandwidth requirements for UWB devices, such systems were eventually developed. See First R&O, supra, at para. 32. The rules also permit UWB vehicular radar systems employing gated transmissions to be measured in their normal operating modes. See 47 C.F.R. § 15.515(g). MB-OFDM systems hop between several operating channels. The hopping to different frequency channels of operation also can be described as a step or sequenced modulation. See Order, supra, at para. 17. The request from Freescale was contained in its comments. Freescale comments to MBOA-SIG's petition at p. 11; Freescale reply comments to MBOA-SIG's petition at p. 7. The MB-OFDM modulation
• http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-12-34A1.doc http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-12-34A1.pdf http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-12-34A1.txt
  • main-beam limits) is more stringent than the -41.3 dBm limit in Section 15.209; however, we still propose to harmonize with Europe on the derived main-beam limits for this frequency range. We note also that in our rules, the limits at these frequencies for some UWB devices are also more stringent than Section 15.209. See e.g., 47 C.F.R. §§ 15.510(c)(4) and 15.515(d). Higher frequencies have more associated propagation losses. For example, there are approximately 58 dB of free space path loss at 3 meters for a 6 GHz signal versus 80 dB for an 80 GHz signal. See 47 C.F.R. §§ 15.250(d)(1), 15.252(b)(1) & (2), 15.509(d), 15.510(d)(3), 15.511(c), 15.513(d), 15.515(d), 15.517(c), and 15.519(c). Notice and Order, 25 FCC Rcd. 601, 604 (2010)