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FCC-MPE

Guangzhou Qicai Electronic Technology Co., Ltd. QC-3201N Touch all-in-one 2BFWU-QC-3201N 2BFWUQC3201N qc 3201n

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Document DEVICE REPORTGetApplicationAttachment.html?id=7385440 
FCC ID:2BFWU-QC-3201N

RF Exposure Evaluation

According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1091 Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied.

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)

Frequency range (MHz)

Electric field strength (V/m)

Magnetic field strength (A/m)

Power density Averaging time

(mW/cm2)

(minutes)

(A) Limits for Occupational/Controlled Exposures

0.3­3.0

614

1.63

*(100)

6

3.0­30

1842/f

4.89/f

*(900/f2)

6

30­300

61.4

0.163

1.0

6

300­1500

f/300

6

1500­100,000

5

6

(B) Limits for General Population/Uncontrolled Exposure

0.3­1.34

614

1.63

*(100)

30

1.34­30

824/f

2.19/f

*(180/f2)

30

30­300

27.5

0.073

0.2

30

300­1500

f/1500

30

1500­100,000

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

BT&2.4G WIFI mode

Channel

Output power to antenna
(dBm)

802.11b

9.2

802.11g

8.26

802.11n(HT20)

6.74

8DPSK

8.17

Output power Power Density

to antenna at R=20cm

(mW)

(mW/cm2)

Limit (mW/cm2)

8.32

0.0017

1.0

6.70

0.0013

1.0

4.72

0.0009

1.0

6.56

0.0013

1.0

Result
PASS PASS PASS PASS

Remark: antenna gain=6dBi So a SAR test is not required

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