Parts List/Tune Up Info

RF Exposure Report

FCC ID: 2AXV6NSPX2A

RF Exposure Measurement

The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The

gain of the antennas used in the product is extracted from the Antenna data sheets provided

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 far field assumption, the calculated result of that is

an over-prediction for near field power density. It is taken as worst case to specify the safety

range.

RF Exposure Limit

According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the

environmental impact of the human exposure to radio-frequency (RF) radiation as specified in

1.1307 (b)

Limits for Maximum Permissible Exposure (MPE)

F= Frequency in MHz

Frequency Range

(MHz)

Electric Field

Strength (V/m)

Magnetic Field

Strength (A/m)

Power Density

(mW/cm²)

Limits for Occupational / controlled Exposures

300 - 1500

F/300

1500 – 100000

5.0

Limits for General population / Uncontrolled Exposure

300 - 1500

F/1500

1500 – 100000

1.0

PAGE 1
RF Exposure Report FCC ID: 2AXV6NSPX2A RF Exposure Measurement The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided 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.
PAGE 2
Friss Formula Friss 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 the center of radiator in cm If we know the maximum gain of the antenna and the total output power to the antenna, through calculation, we will know MPE value at distance 20cm.