Attachment Exhibit 1 - Rad Haz

This document pretains to SES-MOD-20120119-00068 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2012011900068_893663

FCC Form 312 Exhibit 1 RADIATION HAZARD STATEMENT for LiveTV OpenPort The LiveTV terminal operates at a total transmitter power that is less than that of existing Iridium OpenPort Systems. The Maximum Permissible Exposure (MPE) for this mobile earth station at a distance of 0.3 meters is calculated as follows: S = EIRP/ 4 π R2 Where S = Power Density (Watts / m2) EIRP = Radiated power (Watts) R = Distance from body (m) EIRP = max transmit power x antenna gain x Duty cycle Transmitter power = 2Watts at the antenna feed point Antenna gain = 7.7dB maximum (5.89 times) Duty cycle = 4 time slots * 8.28 ms per transmission / 90 ms per frame = 0.368 EIRP = 2 x 5.89 x 0.368 = 4.33 Watts S = 4.33 Watts/ 4 π (0.3)(0.3) = 3.83 Watts/ m2 At 0.3m the power density is less than the 10 Watts/ m2 requirement for the general population/uncontrolled exposure. The LiveTV antenna, which will be mounted on the exterior of airplanes, will be at least 0.3m from the user and the general public. The user manual for the LiveTV terminal will state that installations must comply with this separation distance. Alternatively, the minimum distance to ensure that the power density is below the 10 Watts/ m2 requirements for general population/uncontrolled exposure is calculated as follows. R= sqrt(EIRP / 4 π S) = sqrt ( 4.33 / 4 π x 10) = 0.186 meters.


Document Created: 2011-06-14 17:51:52
Document Modified: 2011-06-14 17:51:52
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