Attachment Supplement1

This document pretains to SES-STA-20050907-01217 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2005090701217_453833

FCC FORM 312 INPUT DATA ANTENNA E28. E29. E30. E31. E32. E41/42. Site ID Quantity Manufacturer Model Antenna Size Antenna Gain Tx/Rx Antenna Type .96 KU AVSAT 50 AVL Technologies 960 AvSAT 0.96 meters 39.7 dBi at 11.850 GHz 41.2 dBi at 14.125 Ghz E28. E33/34. E35. E36. E37. E38. E39. E40. Diameter Building Ht Minor/Major Above Ground Level Above Sea Level above Grnd Lvl Total Input Pwr at Ant Max Ant Ht above Total EIRP for all Antenna Maximum EIRP Site ID (meters) (meters) (meters) (meters) Flange (Watts) Rooftop (meters) carriers (dBW) .96 KU AVSAT 0.0/0.0 0 0 0 4.0 0 46.75 FREQUENCY E47. E49. E28. E43/44. Frequency E45. E46. Emission E48. Max EIRP Density Carrier No. Antenna ID Bands (MHz) T/R Mode Ant Polarization Designator Max EIRP/Carrier (dBW/4 kHz) 11700.000 1 .96 KU AVSAT 12200.000 R Horizontal & Vertical 0 0 E50. Modulation and Services: QPSK Modulation, 8 mbps, FEC Rate 3/4, Digital Carrier 14000.000 2 .96 KU AVSAT 14500.000 T Horizontal & Vertical 120KG7D 38.7 24 FREQUENCY COORDINATION E60. E52/53. E54/55. E56. E57. E58. E59. MAX EIRP Density E28. E51. Frequency Limits Range of Sat Arc ES Azimuth Ant Elevation ES Azimuth angle West Ant Elevation angle toward Horizon Antenna ID Satellite Orbit Type (MHz) East/West Limit Angle East Limit angle East Limit Limit West Limit (dBW/4kHz) 11700.000 .96 KU AVSAT Geostationary 12200.000 60.0/143.0 0.0 10 0.0 10 0.0 14000.000 Geostationary 14500.000 60.0/143.0 0.0 10 0.0 10 -6.1 SUPPORTING DATA AND CALCULATIONS FOR ABOVE FCC 312 ENTRIES Summary of EIRP and EIRP Density per Carrier Value Critical parameter Carrier 2 Maximum Permissible Feed Power/4 KHz -15 Calculated Feed Power Density (dBW/4 kHz) -17.3 Maximum Permissible EIRP Density toward 26.2 the Horizon (dBW/4kHz) Maximum Permissible EIRP/Carrier - 41.0 Theroetical

Calculated Maximum EIRP/Carrier - Link 38.7 Analysis (AMC1 & AMC4) Individual Carrier Calculations - Carrier #2 E50 Carrier 2 - Calculations Instructions for making calculations to the left E47 Digital Carrier Emission designator 120KG7D Modulation and Service QPSK FEC 3/4 Data Rate 128 kbps Bandwidth 120 kHz Calculations Carrier Data Rate Conversion (dBW) 50.8 (10 x Log(120000)) 4 KHz conversion (dBW) 36.0 (10 x Log(4000)) Divide 4 KHz into 120 kHz (subtract Logs) 14.8 Subtracting Logs is same as dividing analog (120000/4000) then converting to logs Enter Max Permissible EIRP/4 KHz 26.2 dBW/4kHz Found by adding antenna gain to maximum feed drive level of -15 dBW.4 kHz Maximum Allowed EIRP per Carrier 2 41.0 dBW Add quotient on 120/4 in logs (29.8) to Max Permitted Density (26.2) E48 Carrier EIRP Required by Link Budget 38.7 dBW Verify the Total EIRP for this carrier is less than Maximum Allowed Maximum Required EIRP/4 kHz 23.9 dBW/4kHz Subtract the quotient above (14.8) from the total EIRP (38.7) Maximum Permitted Feed Power Calculation Maximum feed input power - carrier 2 -0.2 dBW Subtract Antenna Gain (41.2) from Max EIRP (41) Convert to Input power per 4 kHz -15.0 dBW/4kHz Subtract Quotient above (14.8 from Feed input EIRP (-0.2) Confirm input power is within specifications OK If equal to or less than -15 dBW/4 kHz "OK" Feed input power in Watts 0.95 Watts Conversion of -0.2 dBW to Watts (antilog -0.2/10) Losses between Transmitter and Feed 0.25 dB Maximum allowable Transmitter power 0.0 dBW Equals feed input power plus losses Maximum allowable Transmitter power 1.0 Watts Conversion of 0.0 dBW to Watts (antilog 0.0/10) Link Budget Feed Power Calculation Maximum feed input power - carrier 2 -2.5 dBW Subtract antenna gain (41.2) from Required EIRP (38.7) Convert to Input power per 4 kHz -17.3 dBW/4kHz Subtract quotient equivalent of 120/4 (14.8) from Maximum feed input power (-2.5) Confirm input power is within specifications OK If equal to or less than -15 dBW/4 kHz "OK" Feed input power in Watts 0.6 Watts Convert Feed input EIRP to Watts (antilog -2.5/10) Losses between Transmitter and Feed 0.25 dB Maximum Transmitter power (dBW) -2.25 dBW Equals feed input power plus losses Maximum Transmitter power (Watts) 0.60 Watts Conversion of -2.25 dBW to Watts (antilog -2.25/10)

Off Axis Gain Envelope Mazimum allowed under FCC 25.209 paragraph 2. Defined by Equation 32 - 25 log T dBi 1° </= Theta </+ 48° -10 dBi 48° < Theta </= 180° Calculation of the maximum off-axis EIRP density for the .96M Mobile VSAT FCC Declaratory Order 3588 Off- antenna systems Axis EIRP Limits Value of Theta 32-25*logT .96M Gain Max EIRP Off axis 15-25 logT (Max .96M Off-Axis (degrees) (dBi) (dBi) Density Density Value in EIRP Evaluation (dBW/4kHz) (dBW/4kHz) dBW/4kHz) 1 32.0 41.2 24 14.8 15.0 OK 2 24.5 41.2 24 7.3 7.5 OK 3 20.1 41.2 24 2.9 3.1 OK 4 16.9 41.2 24 -0.3 -0.1 OK 5 14.5 41.2 24 -2.7 -2.5 OK 6 12.5 41.2 24 -4.7 -4.5 OK 7 10.9 41.2 24 -6.3 -6.1 OK 8 9.4 41.2 24 -7.8 -6.1 OK 9.2 7.9 41.2 24 -9.3 -6.1 OK 10 7.0 41.2 24 -10.2 11 6.0 41.2 24 -11.2 12 5.0 41.2 24 -12.2 13 4.2 41.2 24 -13.0 14 3.3 41.2 24 -13.9 15 2.6 41.2 24 -14.6 16 1.9 41.2 24 -15.3 17 1.2 41.2 24 -16.0 18 0.6 41.2 24 -16.6 19 0.0 41.2 24 -17.2 20 -0.5 41.2 24 -17.7 25 -2.9 41.2 24 -20.1 30 -4.9 41.2 24 -22.1 35 -6.6 41.2 24 -23.8 40 -8.1 41.2 24 -25.3 45 -9.3 41.2 24 -26.5


Document Created: 2005-09-07 09:14:52
Document Modified: 2005-09-07 09:14:52
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