9 Test report-MPE

FCC ID: 2ATKX-E310

RF Exposure Info

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FCCID_4351519

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Maximum Permissible Exposure
1. Introduction

In this document, we try to prove the safety of radiation harmfulness to the human body for
our product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is
followed. The Gain of the antenna used in this product is measured in a Fully Anechoic
Chamber (FAC), and also the maximum total power input to the antenna is measured. Through
the Friis transmission formula and the maximum gain of the antenna, we can calculate the
distance, away from the product, where the limit of MPE is reached.
Although the Friis transmission formula is a far field assumption, the calculated result of
that is an over-prediction for near field power density. We will take that as the worst case to
specify the safety range.

2. Description of EUT

Product E310 Fliprobot Kit
Applicant Name Actura Co. Ltd.
3F No.94, Chaozhou St. Da-An Dist., TAIPEI CITY 10642
Applicant Address
TAIWAN R.O.C.
Manufacturer Name Actura Co. Ltd.
3F No.94, Chaozhou St. Da-An Dist., TAIPEI CITY 10642
Manufacturer Address
TAIWAN R.O.C.
Model No E310
FCC ID 2ATKX-E310

3. Classification

The antenna of this product, under normal use condition, is at least 20cm away from the
body of the user. Warning statement to the user for keeping at least 20cm or more separation
distance with the antenna should be included in users manual. So, this device is classified as
Mobile Device.

Report Number:MLT1905P15002

Page: 2 / 2

4. Friis Formula

Friis transmission formula : Pd = (Pout*G) / (4*pi*r^2)

Where
Pd = power density in mW/cm^2
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 (20cm)

5. RF Exposure Limit :

According to FCC 1. 1310: The criteria listed in the following table shall be used to
evaluate the environmental impact of human exposure to radio frequency (RF) radiation as
specified in 1.1307(b)

LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE)
Frequency Electric Field Magnetic Field Power Density Average Time
Range (MHz) Strength (V/m) Strength (A/m) (mW/cm^2) (minutes)
(A)Limits For Occupational / Control Exposures
300-1500 F/300 6
1500-100,000 5 6
(B)Limits For General Population / Uncontrolled Exposure
300-1500 F/1500 30
1500-100,000 1 30

6. Test Result:

Frequency Max RF Power TX Antenna Testing Result MPE Limit
(MHz) (mW) Gain (dBi) (mW/cm^2) (mW/cm^2)
2402 0.310 -4 0.0098 1
2440 0.200 -4 0.0063 1
2480 0.148 -4 0.0047 1

Report Number:MLT1905P15002

Document Created: 2019-07-11 13:47:23
Document Modified: 2019-07-11 13:47:23

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