Attachment WNBC-H-C-1.2m_OET65_

This document pretains to SES-LIC-20101221-01564 for License on a Satellite Earth Station filing.

IBFS_SESLIC2010122101564_857622

FCC OET-65 RF Exposure Study - Satellite Uplink Facility
WNBC Digital Ku-band transportable uplink - “H-C”

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                120.0 cm
Antenna surface area                                      calculated              11310 cm2
Sub-reflector diameter                                    measured          N/A           cm
Sub-reflector area                                        calculated        N/A           cm2
Feed flange diameter                                      estimated                5.400 cm2
Feed flange area                                          calculated                   23
Frequency                                                 (entry)                 14125 MHz
Wavelength (speed of light = 299,792,458 m/s)             calculated               2.122 cm
Transmit power at flange                                  Application            180000 milliwatts
Antenna gain                                              datasheet                 43.2 dBi
Antenna gain factor                                       calculated              20893
Height of base of antenna above ground                    measured                    3.7 m
Height of center of antenna above ground                  measured                    4.3 m
Minimum Elevation Angle                                   (entry)                      15 degrees
Minimum Elevation Angle                                   calculated            0.26180 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                63.66 mW/cm2         Potential Hazard       Potential Hazard
Power density at subreflector                          Eq. 11 Pg 27                     0 mW/cm2              N/A                    N/A
Power density at feed flange                           Eq. 11 Pg 27             31438.01 mW/cm2         Potential Hazard       Potential Hazard
Extent of near-field                                   Eq. 12 Pg 27                 1696 cm
Maximum near-field power density                       Eq. 13 Pg 28                41.38 mW/cm2         Potential Hazard             Potential Hazard
Aperture efficiency                                    datasheet                     0.65
Distance to beginning of far-field                     Eq. 16 Pg 29              4070.82 cm
Power density at end of the transition regiion         Eq. 17 Pg 29                17.24 mW/cm2         Potential Hazard             Potential Hazard
Maximum far-field power density                        Eq. 18 Pg 29               18.059 mW/cm2         Potential Hazard             Potential Hazard

Main Beam Far-field region safe exposure distances
Minimum distance for public/uncontrolled exposure         Eq. 18 Pg 29            172.99 meters
   Height at minimum antenna elevation angle              calculated               49.07 meters
   Horizontal distance                                    calculated               167.1 meters

Minimum distance for occupational/controlled exposure     Eq. 18 Pg 29             77.37 meters
   Height at minimum antenna elevation angle              calculated               24.32 meters
   Horizontal distance                                    calculated               74.73 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               0.4138 mW/cm2         Below FCC MPE                Below FCC MPE
Public/uncontrolled exposure off-axis distance         Diam/or Eq 17                  1.2 meters
Occupatonal/controlled exposure off-axis distance      Diam/or Eq 17                  1.2 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)                     15 degree(s)
     Off-axis antenna gain factor                         OET-65 Pg 30*                2
     Minimum distance for public/uncontrolled exposure    Eq. 18 Pg 29 **          40.71 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, December 21, 2010



Document Created: 2019-04-21 13:48:17
Document Modified: 2019-04-21 13:48:17

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