Attachment Radiation Hazard

This document pretains to SES-LIC-20130812-00722 for License on a Satellite Earth Station filing.

IBFS_SESLIC2013081200722_1006025

FOX TELEVISION STATIONS, INC. FCC Form—312: EXHIBIT— B RF Radiation Hazard Analysis Page—1 of 1. RF RADIATION HAZARD ANALYSIS Exhibit #B Antenna Diameter, (D) = 125 meters / 410125 Feet Antenna Surface Area (Sa) = 1.2272 sq meters Subreflector Diameter (Ds) = 0.0000 centimeters Ku Wavelength at 14.250 GHz (LAMBDA} = 0,21038067 meters Power output of VPC Flange= 20.969 daw Path Loss to OMT{It) = 0.6 dB Power at OMT, (P} = 108.87 Watts Antenna Gain at 14.250GHz (G) = 43.40 dBi (2 port antenna gain) Antenna Gain given in Power Ratip , (Ges)= 219604 Antenna Agerture Efficiency (N) = 0.650 Region Radition Level Hazard Assessment Far Field, (Rf)= 4.456 meters / 14.62 Feet 954.485 mW/om sq Potential Hazard Near Field, (Wf) = 1.857 meters / 6.092 Feet 23.066 mW/em sq Potential Hazard Transition Region (Rt) equal to or less than Ru<Rt<Rf 23.066 mW/cm sq Potential Hazard Between Main Reflector N/A (no subreflector) and Subreflector (Ws) Main Reflector Region (Wm) 17.743 mW/emsq Potential Hazard Power Density Between Reflector 8.872 mW/em sq Potential Hazard and Ground Far Field Off Axis (WF) 9.545 mW/em sq Potential Hazard Near Field Off Axis (WN) 0.231 mW/em sq Meets ANSI Requirements Conclusion: Based on the above analysis, harmful areas of Radiation do exist in the areas around the antenna and in the path of the antenna toward the satellite that it is pointed at. The Area occupied by the general public will not exceed the ANSI limit of 1mW em sq. because the antenna is mounted on top of the truck, which is at least 8 feet above the ground, and safety increases with look angles used by the Satellites in the United States on Dom. Sat. arch. The areas on the ground and behind the antenna are 100 times less power {20dB) when at a min. of the dia. of the reflector. This is reflected in the Off Axis figures as seen above (WF) & (WN}. The SNG will be marked with the standard radiation hazard warnings, and on the antenna itself. The warning signs will warn personnel to avoid the area around and in front of the reflector when the transmitter is operating. To ensure compliance with safety limits, the earth station transmitter will be turned off and marked to remain off whenever maintenance and repair personnel are required to work in the areas of potential hazard as defined in the above study. Additionally, the earth station personnel will be trained to ensure that the antenna path is clear at all times while the transmitter is in operation. The only access to the roof of the truck is a ladder that is not accessible by the general public. Note: See Exhibit #Ba for how the above calculations were made.

FOX TELEVISION STATIONS, INC. FCC Form—312: EXHIBIT— Ba Analysis of Non—ionizing Radiation Page—1 of 1. [ Antenna Diameter, (©) = 1.25 meters prs2sie 401 Feet | Antenna Surface Area, (Sa) = Sas m .—.._D.‘%D-,___ Sas 1227 sq meters Subreflector Diameter, (Ds] = Ds:= 0 cm bs*.3837 0.000 inches | T Area of Subreftector, (As)= Asi= at ——CSC5— as= 0.000 sq meters Center Frequency, (Cf= Ch:= 14.250 GHz | Wavelength at (Cf), (Lambda) = Lambda= 0.2103806709 meters Tansmit Power at HPA or VPC Flange, (P1) = Pi= 125.00 watts elpu)+10 pr= 20.969 a8 Path Loss from HPA or VPC to OMT,(It} = Loss:= 0.5 P3:=P2—Loss pa= 20.369 OMT Pwrin de Pm 10 —Zg— p= q08.870 OMT Pwin watts Antenna Gain at (C1), (Gain}= Gain:= 43.40 db Antenna Gain Converted to Power Ratio (Ges)= Ges:= 10 -(1—5?-—————- Gese 2196604 Ratio [ Antenna Aperture Efficiency, (n) = __n:= 0.6500 : Far Fleld 60 * (0*0) 4456 meters arFiekd (®) (RQ=— R= 001 Lambda m feet . Far Field Power Density (Wh = w= ——SEL— +a whs gsau8s mw sq em a* n (RTFRA Near Fleld (Rn) = An= (oto} 1857 meters 4*tambda 5.092 feet n Near Field Power Density (Wa) = Wns Loo + a Wns 23056 mw sq em (o*D) Transition Region (Rt)= Rt= wa*n R= 23.056 musq cm [Equal to or less than} & Pwr Density at Sub Reflector (Ws) = Wss __2E__ ©1000 Ws= N/A As Main Reflector Region Pwre Density (Wm) = Wm= ___zg"."_.__.. *a Wms a7.743 mw sq om a Pwr Density between main reflector a anf we= P +a we= 8872 mw sq em ground (We) = Sa [ Far Field Off Axts (WF) = __WE= wh.or wE= 9.545 mw so cm | [ Near Field Off Axis (WNJ = Wh:= Wn*.01 WN= 0231 muw sq m ]


Document Created: 2013-08-02 14:11:34
Document Modified: 2013-08-02 14:11:34
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