Attachment RadHaz

This document pretains to SES-LIC-INTR2018-04679 for License on a Satellite Earth Station filing.

IBFS_SESLICINTR201804679_1474073

du Treil, Lundin & Rackley, Inc. Consulting Engineers RF HAZARD STATEMENT C-BAND FIXED EARTH STATION LOUISIANA TELEVISION BROADCASTING, LLC BATON ROUGE, LOUISIANA This Engineering Statement was prepared on behalf of Louisiana Television Broadcasting, LLC, in support of an evaluation of the radio frequency (RF) environment in the vicinity of a C-Band fixed earth station antenna. This statement details compliance with Section 1.1307(b) of the FCC Rules concerning human exposure RF energy. This statement also details the RF safety work rules for the safe operation of the proposed facility. Background The proposed facility will transmit in the C-Band with a maximum EIRP of 81.5 dBW. The facility will employ a Scientific Atlanta model 8200 10.0-meter diameter aperture antenna, which is mounted on the ground on a concrete foundation. The antenna has a maximum overall height of 11.71 m above ground level with an antenna centerline height of 6.71 m above ground level. Calculated RF Exposure Levels Based on Section 73.1310 of the FCC Rules, the pertinent maximum permissible exposure (MPE) limits for the subject facility are as follows: MPE for General Frequency MPE for Occupational / Population/Uncontrolled (MHz) Controlled Exposure (mW/cm2) Exposure (mW/cm2) 5,925 – 6,425 1.0 5.0

du Treil, Lundin & Rackley, Inc. Consulting Engineers Page 2 Calculations of RF exposure were conducted pursuant to the FCC’s OET Bulletin No. 65, Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields (Edition 97-01, August 1997). The following parameters were employed in the calculations: Antenna Gain = 53.5 dBi Frequency = 6,175 MHz Diameter = 10.0 m = 1000 cm Maximum Input Power = 631 watts = 631,000 mW Efficiency Factor (calculated) = 0.54 The following is calculated based on the equations contained in FCC OET Bulletin No. 65: Extent of near-field, Rnf = 514.6 m Maximum on-axis near-field power density, Snf = 1.72 mW/cm2 Distance to beginning of far-field, Rff = 1,235 m Far-field on-axis power density, Sff = 0.74 mW/cm2 Based on FCC OET Bulletin No. 65, “for off-axis calculations in the near- field and in the transition region it can be assumed that, if the point of interest is at least one antenna diameter removed from the center of the main beam, the power density at that point would be at least a factor 100 (20 dB) less than the value calculated for the equivalent distance in the main beam.”* At one antenna diameter distance (10 m) cylindrically off-axis from the antenna main beam, the power density level would, therefore, be less than (Snf /100=) 0.017 mW/cm2. For areas in the vicinity of the antenna, calculations based on simple far- field calculations were used to estimate the RF exposure levels for locations located from 48° and greater off-axis.† Based on these calculations, the general population / uncontrolled environment requirement of 1.0 mW/cm2 would be met at distances exceeding 0.75 m (2.5 ft.) from the dish. * See ¶2 on Page 30 of OET Bulletin No. 65. † See ¶3 on Page 30 of OET Bulletin No. 65 with reference to Equation 18 on Page 29.

du T Treil, Lun ndin & Rackley, In nc. C Consulting Engin neers P Page 3 Based on the above, thet area withhin 10 meterrs or greater located cylindrically c y from the ceenter of the main m beam, aand within 00.75 m (2.5 fft.) at 48° or greater g off-aaxis from thee dish itself, shall be resttricted from access and pproperly posted warning w signns. RF energgy levels outsside of the reestricted areea will be bellow the FCC C MPE M for gen neral populattion / unconttrolled envirronments. Thherefore, thee proposed faacility meets m the req quirements of o Section 1..1307(b) conncerning hum man exposurre to RF enerrgy. Work W Rules for Control of RF Exposure All personns must adhere to the foollowing worrk rules for ccompliance w with the t FCC guid delines for human h expossure RF enerrgy. 1. No N persons shall s be withhin the restri cted area surrrounding thhe earth statiion antenna a wheen it is transm mitting. 2. In I the event persons are required to eenter the resstricted area surroundingg the earth e station antenna, thee antenna traansmissions shall be term minated untiil all persons p exit the restricteed area. 3. The T applican nt shall ensu ure that no buuilding or othher obstaclees will be in tthe areas a that ex xceed the MPPE levels. Louis R. duu Treil, Jr., P P.E. du Treil, L Lundin & Raackley, Inc. 3135 Southhgate Circle Sarasota, F FL 34239 July 26, 20018


Document Created: 2018-07-26 11:08:40
Document Modified: 2018-07-26 11:08:40
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