RF Exposure

FCC ID: 2ASTR-MU

RF Exposure Info

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                         RF Exposure evaluation




                                    Test report
                                   On Behalf of
                   Ningbo Pelican Smart Fishing Tackle Co., Ltd.
                                       For
                             MOBULA Fishing Drone
                         Model No.: MU-0000W1AP01, M

                                    FCC ID: 2ASTR-MU




 Prepared for :   Ningbo Pelican Smart Fishing Tackle Co., Ltd.
                  No.16, Yongchang Road, Chengdong Industrial Park, Xiangshan County,
                  Ningbo City, Zhejiang Province, China




 Prepared By :    Shenzhen HUAK Testing Technology Co., Ltd.
                  1F, B2 Building, Junfeng Zhongcheng Zhizao Innovation Park, Fuhai Street,
                  Bao'an District, Shenzhen City, China




Date of Test:     Feb. 23, 2019 ~ Mar. 13, 2019
Date of Report:   Mar. 13, 2019
Report Number:    HK1903050371-3ER


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1.1Applicable Standard
According to §1.1307(b)(1), 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.
According to §1.1310 and §2.1091 RF exposure is calculated.
KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment
Authorization Policies


 1.2 Requirement
Systems operating under the provisions of FCC 47 CFR 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.
  In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been
defined as mobile device whereby a distance of 0.2m normally can be maintained
between the user and the device, and below RF Permissible Exposure limit shall comply
with.
In accordance with KDB447498D01 for Simultaneous transmission MPE test exclusion
applies when the sum of the MPE ratios for all simultaneous transmitting antennas
incorporated in a host device, based on the calculated/estimated, numerically modeled
or measured field strengths or power density, is ≤ 1.0. The MPE ratio of each antenna is
determined at the minimum test separation distance required by the operating
configurations and exposure conditions of the host device, according to the ratio of field
strengths or power density to MPE limit, at the test frequency. Either the maximum
peak or spatially averaged results from measurements or numerical simulations may be
used to determine the MPE ratios. Spatial averaging does not apply when MPE is
estimated using simple calculations based on far-field plane-wave equivalent conditions.
The antenna installation and operating requirements for the host device must meet the
minimum test separation distances required by all antennas, in both standalone and
simultaneous transmission operations, to satisfy compliance.


1.3 Limit
Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure
                                                                    Averaging
  Frequency      Electric Field   Magnetic Field   Power Density
                                                                      Time
 Range(MHz)      Strength(V/m)    Strength(A/m)      (mW/cm²)
                                                                    (minute)
                   Limits for Occupational/Controlled Exposure
   0.3 – 3.0         614              1.63            (100) *           6
   3.0 – 30         1842/f            4.89/f         (900/f2)*          6
   30 – 300          61.4             0.163             1.0             6


                                                                                  Page 3 of 4


 300 – 1500              /                   /            f/300           6
    1500 –               /                   /             5              6
   100,000


Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure
                                                                       Averaging
  Frequency       Electric Field     Magnetic Field   Power Density
                                                                         Time
 Range(MHz)      Strength(V/m)       Strength(A/m)      (mW/cm²)
                                                                       (minute)
                     Limits for Occupational/Controlled Exposure
   0.3 – 3.0
                       614                 1.63          (100) *          30
   3.0 – 30
                      824/f                2.19/f       (180/f2)*         30
   30 – 300
                       27.5                0.073           0.2            30
 300 – 1500
                         /                   /           f/1500           30
    1500 –
                         /                   /             1.0            30
   100,000


F=frequency in MHz
*=Plane-wave equivalent power density


Manufacturing tolerance
                                   5G WiFi(5725-5850)ANT.1
                                      IEEE 802.11a (Average)
      Channel                 Channel 5745              Channel 5785            Channel 5825
    Target (dBm)                      4                          3                     3
  Tolerance ±(dB)                    1.0                       1.0                    1.0


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1.5 MPE Calculation Method


Predication of MPE limit at a given distance
Equation from page 18 of OET Bulletin 65, Edition 97-01


S=PG/4πR²
Where: S=power density
       P=power input to antenna
       G=power gain of the antenna in the direction of interest relative to an isotropic radiator
       R=distance to the center of radiation of the antenna


As declared by the Applicant, the EUT transmits with the maximum soure-baed Duty
Cycle of 100%-see the User manual, and the EUT is a wireless device used in a mobile
application, at least 20 cm from any body part of the user or nearby persons; from the
maximum EUT RF output power, the minimum mobile separation distance, r =20cm, as
well as the gain of the used antenna is 1.00 dBi for 5.8GWLAN, the power drift from
Turn-up Procedure provide by manufacturer as following states, the RF power density
can be obtained.



1.6    Evaluation Result


 1.6.1 Standalone MPE


                Minimum        Output Power                          Power    Power
                                                     Antenna
               Separation        (Turn-up                           Density  Density   Test
  Mode                                                Gain
                Distance        Procedure)                          At 20 cm  Limit   Results
                                                    (Numeric)              2        2
                  (cm)        dBm         mW                       (mW/cm ) (mW/cm )
  5.8G
                 20.00          5        3.16          1.259        0.000792        1.0000          PASS
  WIFI



1.7Conclusion
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment.

                     .....................End of Report........................



Document Created: 2019-03-25 15:01:38
Document Modified: 2019-03-25 15:01:38

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