RF Exposure

FCC ID: 2ANDL-TM001ZA

RF Exposure Info

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Bay Area Compliance Laboratories Corp. (Kunshan)                                    Report No.: RSHD190131004-00A

FCC §1.1310& §2.1091 –MAXIMUM PERMISSIBLE EXPOSURE (MPE)

Applicable Standard

According to subpart §2.1091 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);

Calculated Data:

                 Frequency                                   Target Output      Evaluation        Power
                                     Antenna Gain                                                             MPE Limit
   Mode            Range                                        Power            Distance        Density
                                                                                                              (mW/cm2)
                   (MHz)           (dBi)      (numeric)     (dBm) (mW)             (cm)         (mW/cm2)
   Zigbee        2405~2480         2.00          1.58        10.5      11.22         20           0.0035           1.0

Note: The target output power was declared by the manufacturer.

Result: The device meet FCC MPE at 20 cm distance.




FCC Part 15.247                                                                                            Page 12 of 34



Document Created: 2019-04-06 00:41:37
Document Modified: 2019-04-06 00:41:37

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