RF Exposure Info

FCC ID: X8WBC840M

RF Exposure Info

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FCCID_4193123

FCC ID: X8WBC840M IC: 4100A-BC840M Maximum Permissible Exposure (MPE) Standard Applicable According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. This is a Mobile device, the MPE is required. According to §1.1310 and §2.1091 RF exposure is calculated. Limits for Maximum Permissive Exposure (MPE) Frequency Range Electric Field Magnetic Field Power Density Averaging Time (MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minute) Limits for General Population/Uncontrolled Exposure 0.3-1.34 614 1.63 *(100) 30 1.34-30 824/f 2.19/f *(180/f2 ) 30 30-300 27.5 0.073 0.2 30 300-1500 / / F/1500 30 1500-15000 / / 1.0 30 F = frequency in MHz * = Plane-wave equipment power density International Standards Laboratory Corp.

FCC ID: X8WBC840M IC: 4100A-BC840M According to RSS 102 issue 5. 2.5.2 Exemption Limits for Routine Evaluation – RF Exposure Evaluation RF exposure evaluation is required if the separation distance between the user and/or bystander and the device’s radiating element is greater than 20 cm, except when the device operates as follows: • below 20 MHz6 and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1 W (adjusted for tune-up tolerance); • at or above 20 MHz and below 48 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 22.48/ƒ0.5W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 48 MHz and below 300 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 0.6 W (adjusted for tune-up tolerance); • at or above 300 MHz and below 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1.31 x 10-2 ƒ0.6834 W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 5 W (adjusted for tune-up tolerance). In these cases, the information contained in the RF exposure technical brief may be limited to information that demonstrates how the e.i.r.p. was derived. International Standards Laboratory Corp.

FCC ID: X8WBC840M IC: 4100A-BC840M Maximum Permissible Exposure (MPE) Evaluation PCB Antenna Maximum output power at antenna input terminal: 15.38 (dBm) Maximum output power at antenna input terminal: 34.51437393 (mW) Tune-Up power Tolerance: 1 dB Duty cycle: 100 (%) Maximum Pav : 43.45102242 (mW) Antenna gain (typical): -3.58 (dBi) Maximum antenna gain: 0.438530698 (numeric) Prediction distance: 20 (cm) MPE limit for uncontrolled exposure at prediction 1 (mW/cm^2) Power density at predication frequency at 20 (cm) 0.0037927 (mW/cm^2) Prediction of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 S=PG/4πR2 Where: S = Power density P = Power input to antenna G = Power gain of the antenna in the direction of interest relative to an isotropic radiator R = Distance to the center of radiation of the antenna Measurement Result: The predicted power density level at 20 cm is 0.0037927 mW/cm2. This is below the uncontrolled exposure limit of 1 mW/cm2. International Standards Laboratory Corp.

FCC ID: X8WBC840M IC: 4100A-BC840M Maximum Permissible Exposure (MPE) Evaluation Dipole Antenna Maximum output power at antenna input terminal: 15.38 (dBm) Maximum output power at antenna input terminal: 34.51437393 (mW) Tune-Up power Tolerance: 1 dB Duty cycle: 100 (%) Maximum Pav : 43.45102242 (mW) Antenna gain (typical): 6 (dBi) Maximum antenna gain: 3.981071706 (numeric) Prediction distance: 20 (cm) MPE limit for uncontrolled exposure at prediction 1 (mW/cm^2) Power density at predication frequency at 20 (cm) 0.0344311 (mW/cm^2) Prediction of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 S=PG/4πR2 Where: S = Power density P = Power input to antenna G = Power gain of the antenna in the direction of interest relative to an isotropic radiator R = Distance to the center of radiation of the antenna Measurement Result: The predicted power density level at 20 cm is 0.0344311 mW/cm2. This is below the uncontrolled exposure limit of 1 mW/cm2. International Standards Laboratory Corp.

FCC ID: X8WBC840M IC: 4100A-BC840M Power measurement: IC EIRP level PCB Antenna Frequency: 2480 MHz Maximum output power at antenna input terminal: 15.38 (dBm) Tune-Up power Tolerance: 1 dB Duty cycle: 100 (%) Antenna gain (typical): -3.58 (dBi) EIRP: 19.055 mW EIRP: 0.01905 W EIRP Limit 2.736 W Measurement Result: The EIRP level is 0.01905W which less than RSS102 section 2.5.2 Exemption Limits above 300 MHz and below 6 GHz condition. IC EIRP level Dipole Antenna Frequency: 2480 MHz Maximum output power at antenna input terminal: 15.38 (dBm) Tune-Up power Tolerance: 1 dB Duty cycle: 100 (%) Antenna gain (typical): 6 (dBi) EIRP: 172.982 mW EIRP: 0.17298 W EIRP Limit 2.736 W Measurement Result: The EIRP level is 0.017298W which less than RSS102 section 2.5.2 Exemption Limits above 300 MHz and below 6 GHz condition. ~ end ~ International Standards Laboratory Corp.


Document Created: 2019-03-04 14:17:00
Document Modified: 2019-03-04 14:17:00
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