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RF Exposure Info

CoreTigo Ltd TIGOHUB IO-Link to IO-Link Wireless Multiport Bridge 2ATSM-TIGOHUB 2ATSMTIGOHUB tigohub

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Document DEVICE REPORTGetApplicationAttachment.html?id=6520595 
FCC ID: 2ATSM-TIGOHUB

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)

Frequency range (MHz)

Electric field strength (V/m)

Magnetic field strength (A/m)

Power density (mW/cm2)

Averaging time (minutes)

(A) Limits for Occupational/Controlled Exposures

0.3­3.0 3.0­30

614 1842/f

1.63 4.89/f

*(100)

6

*(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 1.34­30

614 824/f

1.63 2.19/f

*(100)

30

*(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.

FCC ID: 2ATSM-TIGOHUB

Test Result of RF Exposure Evaluation 2.4G mode

Channel

Output power to antenna (dBm)

Output power to antenna (mW)

2401MHz

9.54

8.99

Power Density at R=20cm (mW/cm2)
0.0002

Limit (mW/cm2)
1.0

Result PASS

Remark: antenna gain=-10dBi The max power density is less than MPE exempt limit, so it is compliance.

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