RF Exposure

FCC ID: SS3-M1P1607

RF Exposure Info

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FCCID_3146139

Bay Area Compliance Laboratories Corp. (Dongguan)                           Report No.:RDG160806002-00B

FCC §15.407 (f) & §1.1310 & §2.1091- MAXIMUM PERMISSIBLE
EXPOSURE (MPE)
Applicable Standard
According to subpart 15.407(f)and subpart §1.1310, 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.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

                         (B) Limits for General Population/Uncontrolled Exposure
Frequency Range        Electric Field       Magnetic Field        Power Density            Averaging Time
     (MHz)            Strength (V/m)        Strength (A/m)           (mW/cm2)                (minutes)
    0.3–1.34                614                   1.63                 *(100)                    30
    1.34–30                824/f                 2.19/f               *(180/f²)                  30
    30–300                 27.5                  0.073                   0.2                     30
   300–1500                  /                      /                  f/1500                    30
 1500–100,000                /                      /                    1.0                     30

f = frequency in MHz; * = Plane-wave equivalent power density;

According to §1.1310 and §2.1091 RF exposure is calculated.


Calculated Formulary:

Predication of MPE limit at a given distance
S = PG/4πR² = power density (in appropriate units, e.g. mW/cm2);
P = power input to the antenna (in appropriate units, e.g., mW);
G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain
factor, is normally numeric gain;
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);

Predication of MPE limit at a given distance
S = PG/4πR² = power density (in appropriate units, e.g. mW/cm2);
P = power input to the antenna (in appropriate units, e.g., mW);
G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain
factor, is normally numeric gain;
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);

For simultaneously transmit system, the calculated power density should comply with:




FCC Part 15.407                                                                               Page 11 of 64


Bay Area Compliance Laboratories Corp. (Dongguan)                          Report No.:RDG160806002-00B


Calculated Data:

                                               Maximum Power
            Frequency                                                 Evaluation     Power
                             Antenna Gain         Including                                       MPE Limit
Modes         Range                                                    Distance     Density
                                                  Tolerance                                       (mW/cm2)
              (MHz)                                                     (cm)       (mW/cm2)
                           (dBi)   (numeric)   (dBm)     (mW)
1.4MHz     2403.5-2477.5    3.93      2.47       30     1000.00         20.00       0.4920            1.0
10MHz      2405.5-2477.5    3.93      2.47       30     1000.00         20.00       0.4920            1.0
20MHz      2410.5-2472.5    3.93      2.47       30     1000.00         20.00       0.4920            1.0
802.11b      2412-2462      3.93      2.47       25      316.23         20.00       0.1556            1.0
802.11g      2412-2462      3.93      2.47       25      316.23         20.00       0.1556            1.0
802.11n                                                                                               1.0
             2412-2462      3.93     2.47           25   316.23         20.00       0.1556
  ht20
802.11a      5180-5825      5.05     3.20           16   39.81          20.00       0.0253            1.0
802.11n
             5180-5825      5.05     3.20           16   39.81          20.00       0.0253            1.0
  ht20

Note:
The Maximum Power Including Tolerance was declared by manufacturer.
All of the modes can`t transmit simultaneously.

Result: Compliance, The device meet FCC MPE at 20 cm distance




FCC Part 15.407                                                                              Page 12 of 64



Document Created: 2016-09-05 20:08:33
Document Modified: 2016-09-05 20:08:33

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