rf exp calc

FCC ID: RJIM-1200XX

RF Exposure Info

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FCCID_841214

Report No. 077272R-RFUSP06V01 RF Exposure Evaluation declaration Product Name : M-1200 Bluetooth GPS Receiver Model No. : M-1200XX FCC ID RJI M-1200XX Applicant : HOLUX Technology, Inc Address : 1F, No.30, R&D Rd. II, Hsinchu City 300, Taiwan (R.O.C.) Date of Receipt : July 19, 2007 Date of Declaration : Aug. 27, 2007 Report No. : 077272R-RFUSP06V01 The declaration results relate only to the samples calculated. The declaration shall not be reproduced except in full without the written approval of QuieTek Corporation. This report must not be used to claim product endorsement by NVLAP any agency of the U.S. Government Page: 1 of 3 Version: 1.0

Report No. 077272R-RFUSP06V01 1. RF Exposure Evaluation 1.1. Limits According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b) LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) Frequency Range Electric Field Magnetic Field Power Density Average Time 2 (MHz) Strength (V/m) Strength (A/m) (mW/cm ) (Minutes) (A) Limits for Occupational/ Control Exposures 300-1500 -- -- F/300 6 1500-100,000 -- -- 5 6 (B) Limits for General Population/ Uncontrolled Exposures 300-1500 -- -- F/1500 6 1500-100,000 -- -- 1 30 F= Frequency in MHz Friis Formula Friis transmission formula: Pd = (Pout*G)/(4*pi*r2) Where Pd = power density in mW/cm2 Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. 1.2. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. The temperature and related humidity: 18℃and 78％ RH. Page: 2 of 3 Version: 1.0

Report No. 077272R-RFUSP06V01 1.3. Test Result of RF Exposure Evaluation Product : M-1200 Bluetooth GPS Receiver Test Item : RF Exposure Evaluation Test Site : CTR1 Antenna Gain Antenna Gain: The maximum Gain measured in fully anechoic chamber is 0dBi in logarithm scale. Output Power Into Antenna & RF Exposure Evaluation Distance (0dBi): Output Power to Antenna Power Density at R = 20 cm Channel Frequency (MHz) (mW) (mW/cm2) 00 2402.00 0.9817 0.0002 39 2441.00 0.8933 0.0002 78 2480.00 1.1015 0.0002 The distance r (4th column) calculated from the Fries transmission formula is far shorter than 20 cm separation requirement. Page: 3 of 3 Version: 1.0


Document Created: 2007-09-06 10:47:17
Document Modified: 2007-09-06 10:47:17
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