MPE Calculation

FCC ID: PKTP1DKF2

RF Exposure Info

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FCCID_901492

Unit 7 Greenways Business Park Bellinger Close Chippenham Wiltshire SN15 1BN Telephone: 01249 800100 Facsimile: 01249 800101 24th January 2008 RFI Global Services Ltd Pavillion A Ashwood Business Park Basingstoke Hampshire RG23 8BG RE: 2.5GHz UE P1D FCC ID: PKTP1DKF2 MPE Calculation To Whom It May Concern, The IPWireless UE P1D Wireless Broadband Modem is considered to be mobile equipment and intended for operation with a separation gap of minimum 20cm between the user and the equipment, therefore the RF Exposure performance can be assessed by a Maximum Permissible Exposure (MPE) calculation. The IPWireless modem uses time division duplex (TDD) technology in normal operation with a maximum duty cycle of 33%, therefore source based averaging can be applied in the MPE calculation. MPE Distance Calculation 5.5MHz Channel 11MHz Channel Antenna Gain 7 dBi 7 dBi Line Loss 0 dB 0 dB Antenna Gain Ratio 5.011872336 5.011872 UE P1D Model KF Tx Output Power 24 dBm 24 dBm Output Power mW 251.19 mW 251.19 mW Maximum EIRP (per Channel) 1258.93 mW 1258.93 mW MPE Limit from 1.1310 1 mw/cm2 1 mw/cm2 Un-controlled/General Public Limit Minimum Distance to meet MPE Limit 10.01 cm 10.01 cm (100% Duty Cycle) 3.94 inches 3.94 inches Table 1: 100% Duty Cycle Calculation IPWireless U.K. Ltd Registered Office as above Reg. No: 4218312 VAT No: 771 3836 15

Sourced Based Duty Cycle Adjustment Total Timeslots in Frame 15 15 Timeslots for Transmit 5 5 Timeslots for Receive 10 10 Percentage time transmitting in Tx timeslot 100 % 100 % Power Control Attenuation 0 dB 0 dB Duty Cycle Correction Factor 33.33 % 33.33 % Minimum Distance to meet MPE Limit 5.78 cm 5.78 cm (33.33% Duty Cycle) 2.27 inches 2.27 inches Table 2: Source Based Averaging Calculation The calculations above show the 2.5GHz UE P1D modem complies with the un- controlled /General Public limit of 1mW/cm2 at a minimum distance of 5.8cm for operation using either 5.5MHz or 11MHz channels. Yours Faithfully P Warburg Technical Associate IPWireless UK Ltd


Document Created: 2008-01-24 14:55:18
Document Modified: 2008-01-24 14:55:18
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