RF Exposure

FCC ID: 2AUHL-U0633

RF Exposure Info

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FCCID_4495382

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                         FCC ID: 2AUHL-U0633


                                     Maximum Permissible Exposure Report
1. Product Information
  FCC ID                                    : 2AUHL-U0633
  EUT                                       : Mini 802.11ac Wireless USB Adapter
  Test Model                                : U0633
  Power Supply                              : 5V/130mA
  Hardware version                          : V1.1
  Software version                          : 1030.28
  WIFI(2.4G Band)                           :
  Frequency Range                           : 2412MHz-2462MHz
  Channel Spacing                           : 5MHz
  Channel Number                            : 11 channels for 20MHz bandwidth (2412~2462MHz)
                                              7 channels for 40MHz bandwidth (2422~2452MHz)
  Modulation Type                           : 802.11b: DSSS; 802.11g/n: OFDM
  Antenna Description                       : omni Antenna, 5dBi (Max.)
  WIFI(5.2G Band)                           :
  Frequency Range                           : 5180-5240MHz
  Channel Number                            : 4 Channels for 20MHz bandwidth(5180-5240MHz)
                                              2 channels for 40MHz bandwidth(5190~5230MHz)
                                                1 Channels for 802.11ac(VHT80)
  Modulation Type                           : 802.11a/n: OFDM
  Antenna Description                       : omni Antenna, 5dBi (Max.)
  SRD(5.8G Band)                            :
  Frequency Range                           : 5745-5825MHz
  Channel Number                            : 5 channels for 20MHz bandwidth(5745-5825MHz)
                                              2 channels for 40MHz bandwidth(5755~5795MHz)
                                              1 channels for 80MHz bandwidth(5775MHz)
  Modulation Type                           : IEEE 802.11a/n/ac: OFDM(64QAM, 16QAM, QPSK, BPSK)
  Antenna Description                       : omni Antenna, 5dBi (Max.)
  Exposure category                         : General population/uncontrolled environment
  EUT Type                                  : Production Unit
  Device Type                               : Mobile Device




  This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                          FCC ID: 2AUHL-U0633


2. Evaluation Method
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 modelled 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.

3. Limit
3. 1 Refer evaluation method

ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency
Electromagnetic Fields, 3 kHz to 300 GHz.
FCC KDB publication 447498 D01 General 1 RF Exposure Guidance v06: Mobile and Portable Devices RF
Exposure Procedures and Equipment Authorization Policies.
FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits.
FCC CFR 47 part2 2.1091: Radiofrequency radiation exposure evaluation: mobile devices.

3. 2 Limit

                    Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure
             Frequency         Electric Field    Magnetic Field    Power Density Averaging 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
             300 – 1500               /                 /                f/300         6
           1500 – 100,000             /                 /                   5          6
                   Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure
             Frequency         Electric Field    Magnetic Field    Power Density Averaging 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 – 100,000             /                 /                  1.0         30

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




   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                          FCC ID: 2AUHL-U0633


4. 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

5. Antenna Information
VBOX7 can only use antennas certificated as follows provided by manufacturer;

    Internal          Antenna Identification           Antenna type and            Operate frequency             Maximum antenna
  Identification        in Internal photos             antenna number                    band                         gain
                           2.4G/5G Wifi                                          2.4GHz – 2.4835GHz
       Antenna                                          Dipole Antenna                                                 5.00 dBi
                            /5.8GWIFI                                               5GHz – 6 GHz


6. Conducted Power

6.1 Test Setup Block Diagram




6.2 Test Procedure

1) The EUT was directly connected to the power meter and antenna output port as show in the Block
diagram;
2) Reading average power in RMS detector.

6.3 Measurement Equipment

Item         Equipment                 Manufacturer           Model No.            Serial No.          Last Cal.           Next Cal.
  1         Power Meter                   R&S                  NRVS                 100444            2019-06-11          2020-06-10
  2         Power Sensor                  R&S                 NRV-Z32                10057            2019-06-11          2020-06-10




   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 3 of 8


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                         FCC ID: 2AUHL-U0633




                                                      [2.4GHz WLAN]
                                                                 Frequency                    Peak Conducted Output Power
               Mode                           Channel
                                                                   (MHz)                                 (dBm)
                                                 1                  2412                                      7.12
           IEEE 802.11b                          6                  2437                                      6.43
                                                11                  2462                                      6.80
                                                 1                  2412                                     10.85
           IEEE 802.11g                          6                  2437                                     11.19
                                                11                  2462                                     10.52
                                                 1                  2412                                     12.81
        IEEE 802.11n HT20                        6                  2437                                     12.51
                                                11                  2462                                     12.00
                                                 3                  2422                                     14.88
        IEEE 802.11n HT40                        6                  2437                                     14.91
                                                 9                  2452                                     14.27

                                                           [5.2G WLAN]
                                                                  Frequency                Average Conducted Output Power
               Mode                          Channel
                                                                    (MHz)                              (dBm)
                                                36                   5180                                   10.38

           IEEE 802.11a                         40                       5200                               9.67

                                                48                       5240                               8.34

                                                36                       5180                               10.08

        IEEE 802.11n HT20                       40                       5200                               9.06

                                                48                       5240                               8.05

                                                38                       5190                               9.29
        IEEE 802.11n HT40
                                                46                       5230                               8.08

                                                36                       5180                               9.82

      IEEE 802.11ac VHT20                       40                       5200                               9.11

                                                48                       5240                               7.93

                                                38                       5190                               9.54
      IEEE 802.11ac VHT40
                                                46                       5230                               8.02

      IEEE 802.11ac VHT80                       42                       5210                               8.44




  This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                 Page 4 of 8


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                         FCC ID: 2AUHL-U0633

                                                          [5.8G WLAN]
                                                                                               Maximum
                                                                                                Average
                                  Mode                Channel        Frequency (MHz)
                                                                                               Conducted
                                                                                                 (dBm)
                                                         149                5745                  13.50

                              IEEE 802.11a               157                5785                  12.90

                                                         165                5825                  12.25

                                                         149                5745                  13.39

                           IEEE 802.11n HT20             157                5785                  12.81

                                                         165                5825                  12.06

                                                         151                5755                  13.60
                           IEEE 802.11n HT40
                                                         159                5795                  12.27

                                                         149                5745                  13.15

                         IEEE 802.11ac VHT20             157                5785                  12.96

                                                         165                5825                  12.22

                                                         151                5755                  13.65
                         IEEE 802.11ac VHT40
                                                         159                5795                  13.03

                         IEEE 802.11ac VHT80             155                5775                  11.99




  This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                 Page 5 of 8


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                         FCC ID: 2AUHL-U0633



7. Manufacturing Tolerance


                                                        2.4GHz WLAN
                                                     IEEE 802.11b (Peak)
          Channel                         Channel 1                   Channel 6                               Channel 11
       Target (dBm)                          7.0                         7.0                                     7.0
      Tolerance ± (dB)                       1.0                         1.0                                     1.0
                                                     IEEE 802.11g (Peak)
          Channel                         Channel 1                   Channel 6                               Channel 11
       Target (dBm)                         11.0                         11.0                                    11.0
      Tolerance ± (dB)                       1.0                         1.0                                     1.0
                                                  IEEE 802.11n HT20 (Peak)
          Channel                         Channel 1                   Channel 6                               Channel 11
       Target (dBm)                         12.0                         12.0                                    12.0
      Tolerance ± (dB)                       1.0                         1.0                                     1.0
                                                  IEEE 802.11n HT40 (Peak)
          Channel                         Channel 3                   Channel 6                                Channel 9
       Target (dBm)                         15.0                         15.0                                    15.0
      Tolerance ± (dB)                       1.0                         1.0                                      1.0


                                                          5.2G WLAN
                                                    IEEE 802.11a (Average)
            Channel                         Channel 36                  Channel 40                            Channel 48
         Target (dBm)                          10.0                         10.0                                 9.0
        Tolerance ± (dB)                        1.0                         1.0                                  1.0
                                                 IEEE 802.11n HT20 (Average)
            Channel                         Channel 36                  Channel 40                            Channel 48
         Target (dBm)                           9.0                         9.0                                  9.0
        Tolerance ± (dB)                        1.0                         1.0                                  1.0
                                                 IEEE 802.11n HT40 (Average)
            Channel                                Channel 38                                        Channel 46
         Target (dBm)                                  9.0                                              9.0
        Tolerance ± (dB)                               1.0                                              1.0
                                               IEEE 802.11ac VHT20 (Average)
            Channel                         Channel 36                  Channel 40                             Channel 48
         Target (dBm)                           9.0                          9.0                                  8.0
        Tolerance ± (dB)                        1.0                          1.0                                  1.0
                                               IEEE 802.11ac VHT40 (Average)
            Channel                                Channel 38                                        Channel 46
         Target (dBm)                                  9.0                                              8.0
        Tolerance ± (dB)                               1.0                                              1.0
                                               IEEE 802.11ac VHT80 (Average)
            Channel                                                    Channel 42
         Target (dBm)                                                      9.0
        Tolerance ± (dB)                                                   1.0




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                                                                 Page 6 of 8


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                         FCC ID: 2AUHL-U0633


                                                           5.8 WLAN
                                                   IEEE 802.11a (Average)
            Channel                        Channel 149                Channel 157                             Channel 165
         Target (dBm)                         13.0                         13.0                                  13.0
        Tolerance ± (dB)                       1.0                         1.0                                    1.0
                                                IEEE 802.11n HT20 (Average)
            Channel                        Channel 149                Channel 157                             Channel 165
         Target (dBm)                         13.0                         13.0                                  13.0
        Tolerance ± (dB)                       1.0                         1.0                                    1.0
                                                IEEE 802.11n HT40 (Average)
            Channel                              Channel 151                                         Channel 159
         Target (dBm)                                13.0                                               13.0
        Tolerance ± (dB)                              1.0                                                1.0
                                              IEEE 802.11ac VHT20 (Average)
            Channel                        Channel 149                Channel 157                             Channel 165
         Target (dBm)                         13.0                         13.0                                  13.0
        Tolerance ± (dB)                       1.0                          1.0                                   1.0
                                              IEEE 802.11ac VHT40 (Average)
            Channel                              Channel 151                                         Channel 159
         Target (dBm)                                13.0                                               13.0
        Tolerance ± (dB)                              1.0                                                1.0
                                              IEEE 802.11ac VHT80 (Average)
            Channel                                                  Channel 155
         Target (dBm)                                                    12.0
        Tolerance ± (dB)                                                  1.0




  This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                 Page 7 of 8


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                          FCC ID: 2AUHL-U0633


8. Measurement Results
8.1 Standalone MPE

As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 20 cm from any
body part of the user or nearby persons; from the maximum EUT RF output power, the minimum separation
distance, r =20cm, as well as the gain of the used antenna refer to antenna information, the RF power
density can be obtained.

List maximum power
                                    Output power              Antenna         Antenna                                           MPE
                                                                                               Duty            MPE
  Modulation Type                                              Gain             Gain                                            Limits
                                   dBm            mW                                           Cycle         (mW/cm2)
                                                               (dBi)          (linear)                                        (mW/cm2)
     IEEE 802.11b                  7.12        1.3305          5.00            1.9953          100%            0.0032          1.0000
     IEEE 802.11g                 11.19        37.4973         5.00            1.9953          100%            0.0083          1.0000
 IEEE 802.11n HT20                12.81        90.1571         5.00            1.9953          100%            0.0120          1.0000
 IEEE 802.11n HT40                14.91        95.2796         5.00            1.9953          100%            0.0195          1.0000
  IEEE 802.11ac VHT20             13.15        92.6830         5.00            1.9953          100%            0.0130          1.0000
  IEEE 802.11ac VHT40             13.65        25.8226         5.00            1.9953          100%            0.0146          1.0000
  IEEE 802.11ac VHT80             11.99        29.1072         5.00            1.9953          100%            0.0099          1.0000



Remark:
1. Output power (Average) including turn-up tolerance;
2. Output power was adjust to duty cycle at 100% if measured duty cycle less than 98%;
3. MPE evaluate distance is 20cm from user manual provide by manufacturer.


8.2 Simultaneous Transmission MPE

The sample only support one WLAN modular and one antenna, no need consider simultaneous
transmission;



9. Conclusion

The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of
mobile device.




                            ----------------THE END OF REPORT---------------




   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 8 of 8



Document Created: 2019-10-21 17:11:48
Document Modified: 2019-10-21 17:11:48

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