RF Exposure

FCC ID: 2AHCR-C315W

RF Exposure Info

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FCCID_4150394

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG180816055-00C

FCC §15.247 (i) , §1.1310 , §2.1091- MAXIMUM PERMISSIBLE EXPOSURE
(MPE)
Applicable Standard
According to subpart 15.247(i)and subpart §1.1310, systems operating under the provisions of this section
shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in
excess of the Commission’s guidelines.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

(B) Limits for General Population/Uncontrolled Exposure
Frequency Range Electric Field Magnetic Field Power Density Averaging Time
(MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minutes)
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
1500–100,000 / / 1.0 30

f = frequency in MHz; * = Plane-wave equivalent power density;

According to §1.1310 and §2.1091 RF exposure is calculated.

Calculation Formula:

Prediction of power density at the distance of the applicable MPE limit:
S = PG/4R² = 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 (appropriate units, e.g., cm);

Calculated Data:

Tune-up Evaluation Power MPE
Frequency Antenna Gain
Power Distance Density Limit
(MHz)
(dBi) (numeric) (dBm) (mW) (cm) (mW/cm2) (mW/cm2)
2412-2462 2 1.58 23 199.53 20.00 0.0629 1.0
2402-2480 2 1.58 6 3.98 20.00 0.0013 1.0

Note: the Bluetooth and Wifi can`t transmit simultaneously.

Result: Compliance, The device meets MPE requirement for Devices Used by the General Public
(Uncontrolled Environment) at distance ≥20 cm.

Page 13 of 62

Document Created: 2019-03-30 22:52:11
Document Modified: 2019-03-30 22:52:11

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