Attachment Sched S doc LB4

This document pretains to SAT-AMD-20080213-00043 for Amended Filing on a Satellite Space Stations filing.

IBFS_SATAMD2008021300043_622613

EchoStar 17/24 GHz Link Budget

                 Link Parameters                          Clear Sky      Faded D/L
                                                        (Mexico City)   (Mexico City)


Link Geometry:
     Tx E/S Range to Satellite (Cheyenne)   (km)           37,590          37,590
     Rx E/S Range to Satellite              (km)           36,271          36,271
Uplink:
     Carrier Frequency                      (MHz)          25,000          25,000
     Tx E/S Antenna Diameter                (m)              12.0            12.0
     Max. Tx E/S Power to Antenna           (W)               4.7             4.7
     Max. Tx E/S Power Density to Antenna   (dBW/MHz)        -6.9            -6.9
     Tx E/S Antenna Gain                    (dB)             68.2            68.2
     Tx E/S EIRP per Carrier                (dBW)            74.9            74.9
     Atmospheric and Other Losses           (dB)              0.5             0.5
     Free Space Loss                        (dB)            211.9           211.9
Satellite:
     G/T towards Tx E/S                     (dB/K)          10.3            10.3
     EIRP per Carrier towards Rx E/S        (dBW)           55.9            55.9
Downlink:
     Carrier Frequency                      (MHz)          17,500          17,500
     Atmospheric and Other Losses           (dB)              0.1            3.8
     Free Space Loss                        (dB)            208.5           208.5
     Rx E/S Antenna Diameter                (m)              0.45            0.45
     Rx E/S Antenna Gain                    (dB)             36.1            36.1
     Pointing Error                         (dB)              0.5             0.5
     Rx E/S G/T                             (dB/K)           13.1            10.6
     System (LNA+Sky) Noise Temperature     (K)              200             358
Total Link:
     Bandwidth                              (dB-Hz)        73.60           73.60
     C/N - Thermal Uplink                   (dB)           27.8            27.8
     C/N - Thermal Downlink                 (dB)           14.9             8.7
     C/I - Aggregate uplink ASI             (dB)           36.6             36.6
     C/I - Aggregate downlink ASI           (dB)            16.1            16.1
     C/I - Other Link Degradations          (dB)           20.0            20.0
     C/(N+I) - Total, Actual                (dB)           11.6             7.6
     C/(N+I) - Total, Required              (dB)            7.5             7.5
     Excess Margin                          (dB)            4.1             0.1
     Availability                           (%)             N/A            99.95
Aggregate Interference Assessment:
     (C/N) - no ASI                         (dB)            13.6             8.3
     Degradation due to aggregate ASI       (dB)            1.9              0.7



Document Created: 2008-02-20 10:02:36
Document Modified: 2008-02-20 10:02:36

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