Modification Request

0005-EX-ML-2008 Text Documents

ViaSat, Inc.

2008-01-14

                         Modification of Experimental License
                                 Call Sign: WD2XJX
                          File Number: 0044-EX-ML-2006


ViaSat, Inc. wishes to modify its existing experimental license, call sign WD2XJX. The
modifications consist of adding and modifying frequency bands of operation. The
Experimental license is used by ViaSat’s antenna systems (AS) group in Atlanta for the
purposes of antenna development. Specifically, this license modification will allow the
licensee to provide RF signal testing within the address locations noted in the application.
ViaSat will transmit low level CW signals for the purpose of injecting a test signal into
antenna systems undergoing factory testing with the purpose of undergoing factory
testing involving antenna boresight and antenna focus and alignment testing. The
licensee will also test for Passive Intermodulation Products using the 9.14m antenna
pointed in the zenith position for one set of frequencies.

Tables 1, 2 and 3 below provide a summary of all the frequencies and their associated
power and emissions which are to be modified or added.

Technical inquiries can be directed to either Daryl Hunter at ViaSat or Ken Ryan at Skjei
Telecom.

Daryl Hunter, ViaSat, Inc.
6155 El Camino Real
Carlsbad, CA 92009
Email: daryl.hunter@viasat.com
Phone: 760-476-258


Submitted on January 14, 2008 by:     Kenneth G. Ryan, P.E., Consultant to ViaSat, Inc.
                                      Skjei Telecom, Inc.
                                      7777 Leesburg Pike, Suite 315N
                                      Falls Church, VA 22043
                                      Phone: 703-917-4020
                                      Email: ken.ryan@skjeitelecom.com


Table 1: Frequencies and Power Levels Required
Location 1: Duluth (Gwinnett), GA
3235 Satellite Blvd, Building 400 or 800 TBC, Duluth, GA

Purpose: To allow licensee to provide RF signal testing within the address location of this building. Transmit low level
CW signals for the purpose of injecting a test signal into the antenna system undergoing boresight testing. No changes
to this section of the license are requested.


                                                                                                                                           Transmit
                                   Frequency      Vendor and PN for Transmitting        Antenna Pointing angles                  Antenna              Effective
                 Station                                                                                          Polarization              output
                                     Band                  equipment                        from Location 1                       Size                  ERP
                                                                                                                                            power
                                                                   Scientific Atlanta
                                               Agilent RF Source
          Type             Class    (MHz)                              Antenna          Azimuth     Elevation                      (ft)     (dBm)      (watts)
C          FX              N0N       2200      83751B                22-4A , 28-2         90°          -2°        RHC or LHC        4         -40      0.00003
C          FX              N0N       2250      83751B                22-4A , 28-2         90°          -2°        RHC or LHC        4         -40     0.000031
C          FX              N0N       8200      83751B                22-4A , 28-8         90°          -2°        RHC or LHC        4         -50     0.000049




Table 2: Frequencies and Power Levels Required
Location 2; Duluth (Gwinnett), GA
1725 Breckinridge Plaza, Duluth, GA

Purpose: To allow licensee to provide an RF signal at Zenith only for detection of Passive Intermodulation Products by
injecting short duration test signals into antenna system undergoing factory testing.

                                                                                                                                           Transmit
                                   Frequency      Vendor and PN for Transmitting        Antenna Pointing angles                  Antenna              Effective
                 Station                                                                                          Polarization              output
                                     Band                  equipment                        from Location 2                       Size                  ERP
                                                                                                                                            power
                                                                   Scientific Atlanta
                                               Agilent RF Source
          Type             Class     (MHz)                             Antenna          Azimuth     Elevation                      (ft)     Watts      (dBW)
R          FX              NON     7900-8400         MCL            Model 16469            0°          90°        RHC or LHC      13.8      2KW       82 dBW


Table 3: Frequencies and Power Levels Required
Location 2; Duluth (Gwinnett), GA
1725 Breckinridge Plaza, Duluth, GA

Purpose: To allow licensee to provide RF signal testing within the address location of this building. Transmit low level
CW signals for the purpose of injecting a test signal into the antenna system undergoing factory testing for antenna
focus and alignment.

                                                                                              Antenna Pointing angles                                  Transmit
                                     Frequency        Vendor and PN for Transmitting                                                         Antenna              Effective
                 Station                                                                       between receive and        Polarization                  output
                                       Band                    equipment                                                                      Size                  ERP
                                                                                                 transmit location                                      power
                                                    Scientific Atlanta   Scientific Atlanta
          Type             Class       (MHz)            Source               Antenna          Azimuth     Elevation                            (ft)     (dBm)     (watts)
R          FX              N0N     1435 to 1559          2150             22-8A , 28C-1          0°         0 to 2°     Linear or Circular      4         -30       1.0
R          FX              N0N     1650 to 1660.5        2150             22-8A , 28C-1          0°         0 to 2°     Linear or Circular      4         -30       1.0
R          FX              N0N      1668.4-1850          2150             22-4A , 28C-2          0°         0 to 2°     Linear or Circular      4         -30       1.0
R          FX              N0N       2000-2400           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       1.0
R          FX              N0N       3400-4200           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       4.0
R          FX              N0N       4500-4800           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       4.0
R          FX              N0N       5700-6850           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       4.0
R          FX              N0N       7000-7100           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       4.0
R          FX              N0N       7250-7750           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       4.0
R          FX              N0N       7900-8400           2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       5.0
R          FX              N0N      10700-14500          2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       5.0
R          FX              N0N      17300-21200          2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       5.0
R          FX              N0N      27500-31000          2150             22-4A , 28C-8          0°         0 to 2°     Linear or Circular      4         -30       5.0


Key:   C = existing licensed frequency band (no changes)
       M = modification to existing licensed frequency band
       R = Required new frequency band.



Document Created: 2008-01-14 13:58:51
Document Modified: 2008-01-14 13:58:51

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