Attachment Burbank-OET65-DL2007

This document pretains to SES-LIC-20070802-01023 for License on a Satellite Earth Station filing.

IBFS_SESLIC2007080201023_580820

FCC OET-65 RF Exposure Study - Satellite Uplink Facility NBC Burbank 3.7 meter Digital Ku-band uplink FCC Maximum Permissible Exposure Levels Source Units Public/uncontrolled area exposure limit 47CFR §1.1310 1 mW/cm2 Occupational/controlled area exposure limit 47CFR §1.1310 5 mW/cm2 Input Data Antenna Diameter datasheet 370.0 cm Antenna surface area calculated 107521 cm2 Sub-reflector diameter measured 48.260 cm Sub-reflector area calculated 1829 cm2 Feed flange diameter measured 17.145 cm2 Feed flange area calculated 231 Frequency (entry) 14500 MHz Wavelength (speed of light = 299,792,458 m/s) calculated 2.068 cm Transmit power at flange Application 200000 milliwatts Antenna gain datasheet 52.9 dBi Antenna gain factor calculated 194984 Height of base of antenna above ground measured 2.3 m Height of center of antenna above ground measured 4.3 m Minimum Elevation Angle (entry) 32 degrees Minimum Elevation Angle calculated 0.55851 radians FCC Maximum Permissible Exposure (MPE) Results calculated using FCC Bulletin OET-65 (Edition 97-01 August 1997) Uncontrolled Controlled Maximum power density at antenna surface Eq. 11 Pg 27 7.44 mW/cm2 Potential Hazard Potential Hazard Power density at subreflector Eq. 11 Pg 27 437.35 mW/cm2 Potential Hazard Potential Hazard Power density at feed flange Eq. 11 Pg 27 3465.17 mW/cm2 Potential Hazard Potential Hazard Extent of near-field Eq. 12 Pg 27 16554 cm Maximum near-field power density Eq. 13 Pg 28 4.59 mW/cm2 Potential Hazard Below FCC MPE Aperture efficiency Eq. 14 Pg 28 0.62 Distance to beginning of far-field Eq. 16 Pg 29 39728.48 cm Power density at end of the transition regiion Eq. 17 Pg 29 1.91 mW/cm2 Potential Hazard Below FCC MPE Maximum far-field power density Eq. 18 Pg 29 1.966 mW/cm2 Potential Hazard Below FCC MPE Main Beam Far-field region safe exposure distances Minimum distance for public/uncontrolled exposure Eq. 18 Pg 29 557.07 meters Height at minimum antenna elevation angle calculated 299.5 meters Horizontal distance calculated 472.42 meters Minimum distance for occupational/controlled exposure Eq. 18 Pg 29 249.13 meters Height at minimum antenna elevation angle calculated 136.32 meters Horizontal distance calculated 211.27 meters Off-Axis Near Field/Transition Region safe exposure distances from antenna (20 dB reduction in power density at distances greater than one antenna diameter from the main beam center.) OET-65 Pg 30 Maximum off-axis near field power density Eq. 13 Pg 28 0.0459 mW/cm2 Below FCC MPE Below FCC MPE Public/uncontrolled exposure off-axis distance Diam/or Eq 17 3.7 meters Occupatonal/controlled exposure off-axis distance Diam/or Eq 17 3.7 meters Off-Axis Far Field safe exposure distances from the antenna (Based on side lobe attenuation required by FCC 25.209(a)(2)) Angle off main beam axis (1 to 48 degrees) (entry) 1 degree(s) Off-axis antenna gain factor OET-65 Pg 30* 1585 Minimum distance for public/uncontrolled exposure Eq. 18 Pg 29 ** 397.28 meters * Gain converted from dBi to linear multiple ** If calculated distance is less than the start of the far field region, the distance to the start of the far field region is used. Prepared by Doug Lung, NBC Universal, July 27, 2007


Document Created: 2007-07-27 17:08:21
Document Modified: 2007-07-27 17:08:21
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