MPE

FCC ID: Z33-TVSB

RF Exposure Info

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FCCID_2097928

Maximum Permissible Exposure

Applicable Standard
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 limit for maximum
permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this
device has been defined as a mobile device whereby a distance of 0.2m normally can be
maintained between the user and the device.
(a) Limits for Occupational / Controlled Exposure
Electric Field Magnetic Field Averaging Times
Frequency Range Power Density 2 2
Strength (E) Strength (H) ︱E︱ , ︱H︱
(MHz) (S) (mW/cm2)
(V/m) (A/m) or S (minutes)
0.3-3.0 614 1.63 (100)* 6
3.0-30 1842/f 4.89/f (900/f)* 6
30-300 61.4 0.163 1.0 6
300-1500 F/300 6
1500-100000 5 6
(b) Limits for General Population / Uncontrolled Exposure
Electric Field Magnetic Field Averaging Times
Frequency Range Power Density 2 2
Strength (E) Strength (H) ︱E︱ , ︱H︱
(MHz) (S) (mW/cm2)
(V/m) (A/m) or S (minutes)
0.3-1.34 614 1.63 (100)* 30
1.34-30 824/f 2.19/f (180/f)* 30
30-300 27.5 0.073 0.2 30
300-1500 F/1500 30
1500-100000 1.0 30
Note: f=frequency in MHz; *Plane-wave equivalent power density

MPE Calculation Method
E (V/m) = (30*P*G) 0.5/d Power Density: Pd (W/m2) = E2/377
E = Electric Field (V/m)
P = Peak RF output Power (W)
G = EUT Antenna numeric gain (numeric)
d = Separation distance between radiator and human body (m)
The formula can be changed to
Pd = (30*P*G) / (377*d2)
From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well
as the gain of the used antenna, the RF power density can be obtained.

Calculated Result and Limit (Worse Case)

Antenna Power Density Limit of Power
Peak Output Peak Output Test
Gain (S) Density (S)
Power (dBm) Power (mW) Result
(Numeric) (mW/cm2) (mW/cm2)
1 13.19 20.8 0.004 1 Compiles

Document Created: 2013-10-14 18:08:19
Document Modified: 2013-10-14 18:08:19

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