Attachment VTPBS SNG-1 Radiatio

This document pretains to SES-LIC-20141020-00803 for License on a Satellite Earth Station filing.

IBFS_SESLIC2014102000803_1065206

RE RADIATION HAZARD ANALYSIS Exhibit #B Antenna Diameter, (D) = 145 meters / 4.75745 Feet Antenna Surface Area (Sa) = 1.6513 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 dB Path Loss to OMT {iL) = 0.6 dB Power at OMT, (P) = 108.87 Watts Antenna Gain at 14.250GHz (G)= 45.90 dBi (2 port antenna gain) Antenna Gain given in Power Ration, (Ges)= 3.89E+04 Antenna Aperture Efficiency (N) = 0.670 Region Radition Level Hazard Assessment Far Field, (Rf) = 5.996 meters / 19.67 Feet 937.427 mWw/em sq Potential Hazard Near Field, (Wf)} = 2498 meters / 8.197 Feet 17.669 mw/cem sq Potential Hazard Transition Region (Rt) equal to or less than Ru<Rt<Rf 17.669 mw/em sq Potential Hazard Between Main Reflector N/A (no subreflector) and Subreflector (Ws) Main Reflector Region (Wm) 13.186 mw/cem sq Potential Hazard Power Density Between Reflector 6.593 mw/em sq Potential Hazard and Ground Far Field Off Axis (WF) 9.374 mWw/em sq Potential Hazard Near Field Off Axis (WN) 0.177 mw/em sq Meets ANSt 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 ANSt limit of 1mW cm 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.

Antenna Diameter, {D) = D: = 1.45 meters D*3.281 = 4.757 Feet Antenna Surface Area, (Sa)= Sai= p* D:D Sa = 1.651 sq meters {__ Subreflector Diameter, (Ds) = Ds: = 0 cm Ds*.3937 _0.000 Inches * Area of Subreflector, (As) = As:= p* DS4DS 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 P2:=log(p1}*10 P2= 20.969 dB Path Loss from HPA or VPC to OMT, {It) = Loss: = 0.6 P3:= P2—Loss P3= 20.369 OMT Pwr in dB Pi= 10 Zg P= 108.870 OMT Pur in watts Antenna Gain at (Cf), (Gain)= Gain: = 45.90 dBi Antenna Gain Converted to Power Ratio (Ges)= Ges:t= 10 fgm Ges= 3.89E+04 Ratio ] Antenna Aperture Efficiency, {n) = n:i= 0.6700 Far Field (RF) = Rf= .60 * (D*D) Rf= 5.996 meters Lambda Rf*3.281= 19.674 feet a & Ges*P Far Field i Power wer Density (Wf) = Density (WF) Wf= a+* na=——_Az—_—— p* (RFRp * Wf = 427 937.42 mw 5q cm . (D*D) Rn= 2.498 meters Near Field (Rn) = Rn= (Rn) 4*Lambda Rf*3.281= 8.197 feet 16*n*P Near ear Field Fi Power we Density (Wn) = sity (Wn) WA= n ooz 5* 50) t u1 Wn= n . 17.669 mw sq cm Transition Region (Rt})= Rt= Wa*i Rite 17.669 mw sq cm {Equal to or less than} 7 Pwr Density at Sub Reflector (Ws) = Ws= ZASP *1000 Ws = N/A * Main Reflector Region Pwr Density (Wm)= Wms ~—25~:——- *.1 Wm = 13.186 mw sq cm Pwr Density between main reflector and P ground (We) = We= g «_ & *, 1 ws = 6.593 . mw 5q cm | Far Field Off Axis (WF) = _WF:= w£*.01 WF = 9.374 mw sq cm L Near Field Off Axis (WN) = WN:= Wn*.01 WN= 0.177 mw sq cm

EXHIBIT E—1 DIGITAL SATELLITE VAN AND ANTENNA PROFILE VERMONT PUBLIC BROADCASTING SERVICE SEPTEMBER 2014 13.650 FEET (4.159 meters) ®i 11,208 FEET (3.416 meters) DIGITAL SATELLITE UPLINEK TRUCK & ANTENNA PROFILE VERMONT COHEN, DIPPELL AND EVERIST, P.C. Consulting Engineers Washington, D.C.

Variable Data ACCELERATED MEDIA TESHNOLCGICG Project number: 2896 Customer: Vermont Public Television Customer Contact: |Glenn Dud Date: 8/19/2014 Antenna Model Sat—Lite 1411 Peloris Amplifier Model Advantech SSPBM—K125—CRE Antenna Diameter (D) 1.45 meters Subreflector Diameter (Ds 0 cm Center uency [ 14.250 GHz (14.250 GHz for Ku—Band Transmit Power at HPA or VPC Fla (P1 125.00 watts Path Loss from HPA or VPC to OMT (IL 0.6 dB (0.6 for Hub Mount, 2.0 for Rack Mount) Anntena Gain at (Cf) (Gain 45.90 dBi Anntena re Efficiency (n 0.67 Bandwidth of Transmission 9 MHz

Form 312 Blocks Information ACCELERATED mEmaA TECRNCLDGIEE Project number: 2896 Customer: Vermont Public Television Customer Contact: {Glenn Dud Date: 19/2014 Nomenclature Value Unit of Measure Form 312 Block Power at OMT| 108.870 {watts Total EIRP 66.27 dBw B5(h Maximum EIRP toward the Horizon ~4.03 dBw/4KHz B6(i Maximum EIRP Carrier 62.15 dBw B7 Maximum EIRP Carrier 22.60 dBw/4KHz B7


Document Created: 2019-04-10 16:01:39
Document Modified: 2019-04-10 16:01:39
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC