RF Exposure

FCC ID: 2ANM3NTUDT3

RF Exposure Info

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FCCID_4337554

INTERTEK TESTING SERVICES RF Exposure The Equipment Under Test (EUT) is a WIFI module which WiFi function, and WiFi operating at 2412-2462MHz for 802.11b/g/n-HT20, 11 channels with 5MHz channel spacing; 2422-2452MHz for 802.11n-HT20, 7 channels with 5MHz channel spacing. The EUT was powered DC 3.3V. For more detailed features description, please refer to the user’s manual. 2.4GHz WiFi: Antenna Type: Integral Antenna. Antenna Gain: 3.7dBi. Directional Gain: 6.7dBi Modulation Type: BPSK, QPSK, 16QAM, 64QAM, CCK, DQPSK, DBPSK and DSSS, OFDM. The nominal conducted output power specified: 19dBm (Tolerance: +/-4dB). According to the KDB 447498: The maximun conducted emission for the EUT is 21.96dBm in the frequency 2452MHz(IEEE 802.11n-40, MIMO mode) which is within the production variation. The minimum conducted emission for the EUT is 17.49dBm in the frequency 2412MHz(IEEE 802.11b, SISO mode) which is within the production variation. According to FCC Part 2.1091, this unlicensed transmitting devices is categorically excluded from routine environmental evaluation for RF exposure prior to equipment authorization or use, According to the KDB 447498 and OET 65, the simple calculation as below: The source-based time averaged maximum radiated power in MIMO mode = 19+4+6.7= 29.7dBm = 933.25mW From above data, the exposed power density at a distance (R) of 20cm from the center of radiation of the antenna for 2.4GHz band can be calculated according to OET 65 as follow: = 933.25/ 4πR^2 = 0.186 mW/cm^2 The MPE limit is 1.0 mW/cm^2 for general population and uncontrolled exposure in the WIFI frequency range according to FCC Part 1.1310. As the measured power density at 20cm from the transmitter is lower than the MPE limit, the compliance to the MPE limit can be ensured by indicating the minimum 20cm separation between the transmitter's radiating structure and body of the user or nearby persons. FCC ID: 2ANM3NTUDT3

INTERTEK TESTING SERVICES Transmitter Duty Cycle Calculation The EUT transmit continuously during the test, the duty cycle is 100%. The following RF exposure statement or similar sentence is proposed to be included in the user manual: “FCC RF Radiation Exposure Statement Caution: This Transmitter must be installed to provide a separation distance of at least 20 cm from all persons.” FCC ID: 2ANM3NTUDT3


Document Created: 2019-06-21 13:56:33
Document Modified: 2019-06-21 13:56:33
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