Attachment Cover Letter

This document pretains to SES-MOD-20100216-00197 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010021600197_800037

                                             February 15, 2010

System Analysis Branch
Satellite Division
International Bureau
Federal Communications Commission
445 12th Street SW
Washington, DC 20554


       Re:    E060157 License Modification


Pursuant to Section 25.117 of the Commission’s Rules, CapRock Communications, Inc.
respectfully requests the modification of callsign E060157, file SES-MFS-20090811-
00988. The application requests for the following changes:

       Antenna ESV9797
       Addition of emission designators
       Increase of maximum total power at antenna flange
       Increase of aggregate output EIRP for all carriers

A new radiation hazard study has been performed for the antenna (see Exhibit A). The
EIRP density, for the proposed emission designators, has been increased to
25.94dBW/4KHz. Measured at the feed, the EIRP density is -21.06dBW/4KHz. Seatel
certifies that the Seatel 9797 model complies with 47 CFR 25.222(a) (1-4) when the input
power to the antenna is -14dBW/4KHz (See Exhibit B). In the present case, the proposed
emission designators still operate 7dB lower than the limit certified by Seatel.




                                             Sincerely,

                                             /s/ Raul Magallanes
                                             Attorney



Document Created: 2010-02-15 16:23:02
Document Modified: 2010-02-15 16:23:02

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