Sourced Based Averaging Justification

FCC ID: PKTPEMAAU2

RF Exposure Info

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FCCID_2095087

GENERAL DYNAMICS General Dynamics Broadband UK Ltd Broadband 7 Greenways Business Park Bellinger Close Chippenham SN15 1BN Tel: +44 (0) 1249 800100 Fax: +44 (0) 1249 800101 30°" August 2013 UL VS Ltd Pavillion A Ashwood Business Park Basingstoke Hampshire RG23 8BG RE: Application of Source Based Averaging to the RF Exposure Calculation. To whom it may concern, The General Dynamics Broadband PCI Express Mini module is a time division duplex W—CDMA based wireless modem and the design/operation is based on the UMTS 3GPP TDD air interface requirements. The air interface supports a radio frame length of 10ms, this radio frame is divided into 15 timeslots each of duration 666.67uS. As defined in the applicable 3GPP/ETSI documentation, of these 15 timeslots, timeslots 0—9 are assigned to the downlink (module receive) and timeslots 10—14 are assigned to the uplink (module transmit). This is the default timeslot configuration defined by 3GPP/ETSI Standards. DL DL DL DL DL IDSCHIDSCHDSCH Of the timeslots assigned to the uplink, timeslots 11—14 are used to transmit the subscriber‘s data and control signals to the base station. Timeslot 10 is reserved for the call setup procedure as a call can only be initiated by the subscriber. Timeslot 10 transmits the Random Access CHannel to the base station as part of the call setup procedure, once the call setup procedure has been completed, the RACH is no longer transmitted for remaining duration of the call and the PCI Express Mini module only transmits on the remaining timeslots 11—14. Registered No: «zie312 VAT No Ga 771 aeas 15 Regiteed Offee: Ganerl Dyranics Broadband UK Ld,7 Greenvays Business Par, Chippentiam, SN1S 1BN, Unted ngdom

The default timeslot assignment is modified to allow the transmitter (Uplink) to occupy upto 12 timeslots, this gives a maximum duty cycle for the transmitter of 80%. Based on the inherent TDD operation of the PCI Express Mini module, source based averaging has been applied to the MPE calculations with the unit transmitting on 12 out of 15 timeslots as this is worst—case normal operation of the unit when transmitting. Yours sincerely fre— Peter Warburg Principal Engineer General Dynamics Broadband Regiteres No aztear2 vat no: Ga 771 seas 15 Registered Offce: General Cynanies Broadtand Lis 7 Greenays Business Park, Chipparham SN5 18N., Unted Kingdon


Document Created: 2013-08-30 17:06:59
Document Modified: 2013-08-30 17:06:59
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