RF EXPO INFO

FCC ID: 2ANSR-CM92602W

RF Exposure Info

Download: PDF

FCCID_4369117

FCC ID: 2ANSR-CM92602W

RF Exposure Evaluation
Limits
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)
Electric field
Frequency range Magnetic field strength Power density Averaging time
strength 2
(MHz) (A/m) (mW/cm ) (minutes)
(V/m)
(A) Limits for Occupational/Controlled Exposures
0.3–3.0 614 1.63 *(100) 6
2
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
1500–100,000 5 6
(B) Limits for General Population/Uncontrolled Exposure
0.3–1.34 614 1.63 *(100) 30
2
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
1500–100,000 1.0 30
f = frequency in MHz
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.
Test Procedure
Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest
channel individually.

Test Result of RF Exposure Evaluation

WIFI 2.4G mode

Output power to Power Density at Limit
Channel 2 Result
antenna (mW) R=20cm (mW/cm ) (mW/cm2)

Lowest (2412MHz) 40.18 0.0080 1.0 PASS

Middle (2437MHz) 40.09 0.0080 1.0 PASS

Highest (2462MHz) 39.81 0.0079 1.0 PASS

Remarks:
1. Antenna gain=0dBi
2. The max power density is less than SAR exempt limit, so SAR evaluation is not required.

Document Created: 2019-07-24 11:23:59
Document Modified: 2019-07-24 11:23:59

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC