RF Exposure

FCC ID: YAMDS-9300-R

RF Exposure Info

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Bay Area Compliance Laboratories Corp. (Dongguan)                           Report No.: RDG190314005-00A

FCC§1.1307 (b)(1) & §2.1091& RSS-102 CLAUSE 4- MAXIMUM
PERMISSIBLE EXPOSURE (MPE)
Applicable Standard
According to subpart 15.247(i)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.

According to RSS-102 § 4Table 4, RF Field Strength Limits for Devices Used by the General Public
(Uncontrolled Environment)




FCC Part 90                                                                                  Page 10 of 64


Bay Area Compliance Laboratories Corp. (Dongguan)                                 Report No.: RDG190314005-00A

Calculated formulary:
Prediction of power density at the distance of the applicable MPE limit
S = PG/4R² = 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);


Result:
                                    Max. Target Power                     FCC       ISEDC       FCC      ISEDC
                  Antenna Gain                            Evaluation
   Frequency                        including Tolerance                  Power       Power      MPE       MPE
                                                           Distance
     (MHz)                                                              Density     Density     Limit     Limit
                (dBi)   (numeric)   (dBm)      (mW)          (cm)
                                                                       (mW/cm2)     (W/m2)    (mW/cm2)   (W/m2)
    460-470       2       1.58       37        5012         65.00        0.15        1.50       0.31      1.73

Result: Compliance, The device meet FCC MPE at 65 cm distance.




FCC Part 90                                                                                       Page 11 of 64



Document Created: 2019-06-12 07:22:26
Document Modified: 2019-06-12 07:22:26

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