rf exposure

FCC ID: 2ABD3MS-WR10

RF Exposure Info

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FCCID_4330810

1. MAXIMUM PERMISSIBLE EXPOSURE (MPE) 1.1 General Information Client Information Applicant: Ocean Digital Technology Ltd Address of applicant: Flat B, 12/F., Yeung Yiu Chung (No.8) Ind. Bldg., 20 Wang Hoi Road,Kowloon Bay, Hong Kong. Manufacturer: Ocean Digital Technology Ltd Address of manufacturer: Flat B, 12/F., Yeung Yiu Chung (No.8) Ind. Bldg., 20 Wang Hoi Road,Kowloon Bay, Hong Kong. General Description of EUT Product Name: Internet Radio Tuner Trade Name: / Model No.: WR-10 Adding Model(s): WR-20,MA-10,MA-20 Rated Voltage: DC 5V Device Category: Mobile Device Wi-Fi Support Standards: 802.11b, 802.11g, 802.11n-HT20 Frequency Range: 2412-2462MHz for 802.11b/g/n-HT20 RF Output Power: 15.40dBm (Conducted) Type of Modulation: DBPSK,BPSK,DQPSK,QPSK,16QAM,64QAM Data Rate: 1-11Mbps, 6-54Mbps, up to 150Mbps Quantity of Channels: 11 for 802.11b/g/n-HT20 Channel Separation: 5MHz Type of Antenna: Integral Antenna Antenna Gain: 0dBi BT Bluetooth Version: V4.2 (BDR/EDR mode) Frequency Range: 2402-2480MHz RF Output Power: 8.728dBm (Conducted) Data Rate: 1Mbps, 2Mbps, 3Mbps Modulation: GFSK, Pi/4 QDPSK, 8DPSK Quantity of Channels: 79 Channel Separation: 1MHz Type of Antenna: Integral Antenna Antenna Gain: 0dBi

1.2 Standard Applicable According to §1.1307(b)(1) and KDB 447498 D01 General RF Exposure Guidance v06, system operating under the provisions of this section shall be operating in a manner that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. (a) Limits for Occupational / Controlled Exposure Electric Field Magnetic Field Averaging Times Frequency range Power Density Strength (E) Strength (H) | E |2, | H |2 or (MHz) (S) (mW/cm2) (V/m) (A/m) S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 / / F/300 6 1500-100000 / / 5 6 (b) Limits for General Population / Uncontrolled Exposure Electric Field Magnetic Field Averaging Times Frequency range Power Density Strength (E) Strength (H) | E |2, | H |2 or (MHz) (S) (mW/cm2) (V/m) (A/m) S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 / / F/1500 30 1500-100000 / / 1 30 Note: f = frequency in MHz: * = Plane-wave equivalents power density 1.3 MPE Calculation Method S = (30*P*G) / (377*R2) S = power density (in appropriate units, e.g., mw/cm2) P = power input to the antenna (in appropriate units, e.g., mw) G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor is normally numeric gain. R = distance to the center of radiation of the antenna (in appropriate units, e.g., cm)

1.4 MPE Calculation Result For Bluetooth: Maximum Tune-Up output power: 9 (dBm) Maximum peak output power at antenna input terminal: 7.94 (mW) Prediction distance: >20(cm) Prediction frequency: 2441 (MHz) Antenna gain: 0(dBi) Directional gain (numeric gain): 1 The worst case is power density at prediction frequency at 20cm: 0.002(mw/cm2) MPE limit for general population exposure at prediction frequency: 1 (mw/cm2) For Wi-Fi: Maximum Tune-Up output power: 15.5 (dBm) Maximum peak output power at antenna input terminal: 35.48 (mW) Prediction distance: >20(cm) Prediction frequency: 2412 (MHz) Antenna gain: 0(dBi) Directional gain (numeric gain): 1.58 The worst case is power density at prediction frequency at 20cm: 0.007(mw/cm2) MPE limit for general population exposure at prediction frequency: 1 (mw/cm2) Result: Pass


Document Created: 2019-06-21 16:30:56
Document Modified: 2019-06-21 16:30:56
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