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RF Exposure

Shenzhen Kean Digital Co., Ltd. I51CP 2AKL2I51CP 2AKL2I51CP i51cp

Shenzhen Kean Digital Co., Ltd. I51CP Wireless Camera 2AKL2I51CP 2AKL2I51CP i51cp

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Document DEVICE REPORTGetApplicationAttachment.html?id=7626884 
RF Exposure evaluation

FCC ID: 2AKL2I51CP

1. Reference

According to §1.1307(b)(1), 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. According to §1.1310 and §2.1091 RF exposure is calculated. KDB447498 D01: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies

2. Limit

Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure

Frequency Electric Field Magnetic Field Power Density Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²)

0.3 ­ 3.0 3.0 ­ 30 30 ­ 300 300 ­ 1500 1500 ­ 100,000

Limits for Occupational/Controlled Exposure

614 1842/f 61.4
/ /

1.63 4.89/f 0.163
/ /

(100) * (900/f2)*
1.0 f/300
5

Averaging Time
(minute)
6 6 6 6 6

Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure

Frequency Electric Field Magnetic Field Power Density Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²)

Averaging Time
(minute)

Limits for Occupational/Controlled Exposure

0.3 ­ 3.0 3.0 ­ 30 30 ­ 300 300 ­ 1500 1500 ­ 100,000

614 824/f 27.5
/ /

1.63 2.19/f 0.073
/ /

(100) * (180/f2)*
0.2 f/1500
1.0

30 30 30 30 30

F=frequency in MHz *=Plane-wave equivalent power density

3. MPE Calculation Method
Predication of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01

S=PG/4R² 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

4. Antenna Information

EUT can only use antennas certificated as follows provided by manufacturer;

Antenna No.

Model No.

Gain of the antenna

Type of antenna:

of antenna:

(Max.)

Frequency range:

2.4GWIFI

/

External antenna

3.47 dBi for 2400-2500MHz

5GWIFI

/

External antenna

2.64 dBi for 5150-5250MHz 2.19 dBi for 5725-5875MHz

5. Manufacturing Tolerance

Frequency (MHz)
Target (dBm) Tolerance ± (dB)
Frequency (MHz)
Target (dBm) Tolerance ± (dB)
Frequency (MHz)
Target (dBm) Tolerance ± (dB)
Frequency (MHz)
Target (dBm) Tolerance ± (dB)

2412 16.0 1.0
2412 14.0 1.0
2412 16.0 1.0
2422 15.0 1.0

2.4GHz WIFI(Peak) 11b
2437 16.0 1.0
11g 2437 14.0 1.0 11n(HT20) 2437 16.0 1.0 11n(HT40) 2437 15.0 1.0

2462 16.0 1.0
2462 14.0 1.0
2462 16.0 1.0
2452 15.0 1.0

Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz) Target (dBm)
Tolerance ± (dB)
Frequency(MHz)

5GHz WLAN Band 1

IEEE 802.11a (Average)

5180

5200

11.0

11.0

1.0

1.0

IEEE 802.11n HT20 (Average)

5180

5200

12.0

12.0

1.0

1.0

IEEE 802.11n HT40 (Average)

5190

12.0

1.0

IEEE 802.11ac VHT20 (Average)

5180

5200

12.0

12.0

1.0

1.0

IEEE 802.11ac VHT40 (Average)

5190

12.0

1.0

5GHz WLAN Band 4

IEEE 802.11a (Average)

5745

5785

12.0

12.0

1.0

1.0

IEEE 802.11n HT20 (Average)

5745

5785

13.0

13.0

1.0

1.0

IEEE 802.11n HT40 (Average)

5755

13.0

1.0

IEEE 802.11ac VHT20 (Average)

5745

5785

13.0

13.0

1.0

1.0

IEEE 802.11ac VHT40 (Average)

5755

5240 11.0 1.0
5240 12.0 1.0
5230 12.0 1.0
5240 12.0 1.0
5230 12.0 1.0
5825 12.0 1.0
5825 13.0 1.0
5795 13.0 1.0
5825 13.0 1.0
5795

Target (dBm)

13.0

13.0

Tolerance ± (dB)

1.0

1.0

6. Standalone MPE Result
As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 20 cm from any body part of the user or nearby persons; from the maximum EUT RF output power, the minimum separation distance, r=20cm, as well as the gain of the used antenna refer to antenna information,the RF power density can be obtained.

Modulation Type
2.4GWIFI 5GWIFI Band 1 5GWIFI Band 4

Output power

dBm

mW

17.0 50.1187 13.0 19.9526 14.0 25.1189

Antenna Gain (dBi) 3.47 2.64 2.19

Antenna Gain
(linear) 2.2233 1.8365 1.6558

MPE (mW/cm2)
0.02217 0.00729 0.00827

MPE Limits (mW/cm2) 1.0000 1.0000 1.0000

Remark: 1. Output power (Peak) including turn-up tolerance; 2. MPE evaluate distance is 20cm from user manual provide by manufacturer.

7. Conclusion
The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of mobile device.

----------------THE END OF REPORT---------------

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