Exhibit

0844-EX-ST-2018 Text Documents

Microsoft Corporation

2018-05-09ELS_209359

                                                                                    Microsoft Corporation
                                                                                         0844‐EX‐ST‐2018

                                                   EXHIBIT



         Microsoft hereby requests an extension of its Special Temporary Authority (callsign WJ2XCD) to
support its efforts to restore communications capability in areas of Puerto Rico and the United States
Virgin Islands affected by hurricanes Irma and Maria.

          TV white spaces is an ideal technology for connecting communities in Puerto Rico that currently
lack sufficient communications capabilities in the wake of these natural disasters. Microsoft's intention
is to operate TV white space radios on channels authorized for use across Puerto Rico supporting the
recovery efforts of Net Hope, Claro, and others. In these same areas, many broadcast television
operators are currently off the air due to the effects of these storms, but channel availability and power
limits remain restricted for white‐spaces operations on or adjacent to these channels. Microsoft seeks
authorization, when permitted by the applicable broadcast licensee, to operate on these temporarily
unused channels, or operate on adjacent channels subject to greater power limits and other rules that
would apply if the first‐adjacent channel were not occupied by a broadcast licensee. Microsoft would
only operate on these channels or at these elevated power levels with the affirmative consent of the
relevant broadcasters, in coordination with each potentially affected broadcaster, and will return to
ordinary operations under the Commission's rules when informed that the broadcaster has resumed
operations. Microsoft also seeks authorization, consistent with its previous STA, to operate white‐space
devices by manually determining and selecting a permissible channel of operation using a certified
white‐space database not less than once every 24 hours, rather than doing so by accessing a white‐
space database over the Internet to determine available channels when the over‐the‐Internet method is
not possible.




Antenna Information

                                        Adaptrum Log Periodic        Adaptrum FP‐1P (Full Panel)
 Polarization                           Vertical                     Vertical
 Gain                                   11dBi                        11±1dBi
 Half‐Power Beam Width (E Plane)        50 degrees                   30±6 degrees
 Half‐Power Beam Width (H Plane)        65 degrees                   90±8 degrees



Document Created: 2019-04-27 03:58:06
Document Modified: 2019-04-27 03:58:06

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