RF_Exposure_Report

FCC ID: 2ATDMOVMS-31-5360A

RF Exposure Info

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FCCID_4313248

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                    FCC ID: 2ATDMOVMS-31-5360A


                                          Maximum Permissible Exposure Report

1. Product Information
Name of EUT                                      OVMS (Open Vehicle Monitoring System)
Test Model                                       OVMS-31-5360A
Modulation Type                                  GMSK for GSM/GPRS; 8-PSK for EDGE; QPSK for UMTS
                                                 5.0dBi (max.) For GSM 850; 5.0dBi (max.) For PCS 1900;
Antenna Gain                                     5.0dBi for WCDMA Band II; 5.0dBi for WCDMA Band V;
                                                 2.0dBi (max.) For BT and WLAN
Hardware version                                 3.1
Software version                                 3.2.001
GSM/EDGE/GPRS Operation Frequency
                                                 GPRS850/GPRS1900/EDGE850/EDGE1900
Band
UMTS Operation Frequency Band                    UMTS FDD Band II/V
LTE Operation Frequency Band                     Not Supported
GSM/EDGE/GPRS                                    Supported GPRS/EDGE
GSM Release Version                              R99
GSM/EDGE/GPRS Power Class                        GSM850:Power Class 4/ PCS1900:Power Class 1
GPRS/EDGE Multislot Class                        GPRS/EDGE: Multi-slot Class 12
GPRS operation mode                              Class B
WCDMA Release Version                            R8
HSDPA Release Version                            Release 8
HSUPA Release Version                            Release 6
DC-HSUPA Release Version                         Not Supported
LTE Release Version                              Not Supported
LTE/UMTS Power Class                             Class 3
                                                 IEEE 802.11b: DSSS(CCK,DQPSK,DBPSK)
WLAN FCC Modulation Type
                                                 IEEE 802.11g/n: OFDM(64QAM, 16QAM, QPSK, BPSK)
                                                 IEEE 802.11b/g/n20:2412-2462MHz
WLAN FCC Operation frequency
                                                 IEEE 802.11n40:2422-2452MHz
Antenna Type                                     PCB Antenna
BT Modulation Type                               GFSK, π/4-DQPSK, 8-DPSK (BT V4.2)
Extreme temp. Tolerance                          -20°C to +55°C
GPS function                                     Support and only RX
FM function                                      Not Supported
NFC Function                                     Not Supported
Extreme vol. Limits                              10.8VDC to 13.2VDC (nominal: 12.0VDC)
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.
                                                                 Page 1 of 5


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                     FCC ID: 2ATDMOVMS-31-5360A


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 KDB447498 D01 General RF Exposure Guidance v06 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.
                                                                  Page 2 of 5


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                     FCC ID: 2ATDMOVMS-31-5360A


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
OVMS-31-5360A can only use antennas certificated as follows provided by manufacturer;

 Antenna type and antenna number                      Operate frequency band                    Maximum antenna gain
                                                                                               2.0dBi(Max.) for Bluetooth
              PCB Antenna                               600MHz – 2500MHz
                                                                                                       and WLAN
        External Stick Antenna                          600MHz – 2500MHz                        5.0dBi(Max.) for WWAN


6. Conducted Power
General Note: Per KDB 447498 D01v06, the maximum output power channel is used for SAR testing, further SAR test
reduction and MPE.
                                      [Bluetooth Max. Conducted Power]
          Mode               Channel           Frequency(MHz)      Max. Conducted Output Power (dBm)
                                0                   2402                           -0.888
          GFSK                 39                   2441                           0.170
                               78                   2480                           -1.386
                                0                   2402                           -1.611
       π/4DQPSK                39                   2441                           -0.638
                               78                   2480                           -2.232
                                0                   2402                           -1.685
         8-DPSK                39                   2441                           -0.700
                               78                   2480                           -2.234
                                0                   2402                           -0.989
      GFSK BT – LE             19                   2440                           -0.016
                               39                   2480                           -1.487

                                          [2.4GHz WLAN Max. Conducted Power]
          Mode                      Channel        Frequency(MHz)       Max. Conducted Output Power (dBm)
                                       1                2412                          9.86
      IEEE 802.11b                     6                2437                          10.07
                                      11                2462                          8.80
                                       1                2412                          11.14
      IEEE 802.11g                     6                2437                          13.06
                                      11                2462                          12.11
                                       1                2412                          10.89
   IEEE 802.11n HT20                   6                2437                          13.01
                                      11                2462                          11.90
                                       3                2422                          13.16
   IEEE 802.11n HT40                   6                2437                          12.48
                                       9                2452                          12.51




   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 3 of 5


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                     FCC ID: 2ATDMOVMS-31-5360A


                                                  [GSM Max. Conducted Power]
          Mode                      Channel            Frequency(MHz)       Max. Conducted Output Power (dBm)
                                      LCH                    824.2                        32.38
     GSM 850 Band                    MCH                     836.6                        32.44
                                     HCH                     848.8                        32.18
                                      LCH                   1850.2                        29.31
     PCS 1900 Band                   MCH                    1880.0                        29.42
                                     HCH                    1909.8                        29.15

                                                [WCDMA Max. Conducted Power]
          Mode                      Channel          Frequency(MHz)       Max. Conducted Output Power (dBm)
                                      LCH                 826.4                         22.91
    WCDMA Band V                     MCH                  836.6                         23.32
                                     HCH                  846.6                         23.16
                                      LCH                1852.4                         23.11
    WCDMA Band II                    MCH                 1880.0                         23.26
                                     HCH                 1907.6                         23.14


7. Measurement Results
7.1 Standalone MPE
As declared by the Applicant, the EUT is a wireless device used in a fix application, at least 40cm from any body part
of the user or nearby persons; from the maximum EUT RF output power, the minimum separation distance, r =40cm,
as well as the gain of the used antenna refer to antenna information, the RF power density can be obtained.

                                                             [Bluetooth]
                             Max. Tune up Output                                                                           MPE
                                    power                Antenna Gain         Antenna Gain            MPE
   Modulation Type                                                                                                         Limits
                                                             (dBi)               (linear)           (mW/cm2)
                              dBm          mW                                                                           (mW/cm2)
        GFSK                   1.00      1.2589                2.00               1.5849              0.0001              1.0000
      π/4DQPSK                 1.00      1.2589                2.00               1.5849              0.0001              1.0000
       8-DPSK                  1.00      1.2589                2.00               1.5849              0.0001              1.0000
     GFSK (BT LE)              1.00      1.2589                2.00               1.5849              0.0001              1.0000


                                                           [2.4GHz WLAN]
                           Max. Tune up Output                                                                             MPE
                                  power                  Antenna Gain         Antenna Gain            MPE
   Modulation Type                                                                                                         Limits
                                                             (dBi)               (linear)           (mW/cm2)
                            dBm         mW                                                                              (mW/cm2)
     IEEE 802.11b           11.00     12.5893                 2.00                1.5849              0.0010              1.0000
     IEEE 802.11g           14.00     25.1189                 2.00                1.5849              0.0020              1.0000
  IEEE 802.11n HT20         14.00     25.1189                 2.00                1.5849              0.0020              1.0000
  IEEE 802.11n HT40         14.00     25.1189                 2.00                1.5849              0.0020              1.0000


                                                              [WWAN]
                              Max. Tune up Output             Antenna                                                       MPE
                                                                               Antenna Gain            MPE
   Modulation Type                   power                     Gain                                                         Limits
                                                                                  (linear)           (mW/cm2)
                               dBm          mW                 (dBi)                                                     (mW/cm2)
   GSM 850 Band               33.00      1995.2623             5.00                3.1623              0.3138              0.5493
   PCS 1900 Band              30.00      1000.0000             5.00                3.1623              0.1573              1.0000
   WCDMA Band V               24.00      251.1886              5.00                3.1623              0.0395              0.5493
   WCDMA Band II              24.00      251.1886              5.00                3.1623              0.0395              1.0000

Remark:
1.Output power including turn-up tolerance;
2.MPE evaluate distance is 40cm from user manual provide by manufacturer.
3.MPE limits for PCS 1900 and WCDMA Band II refer 1850MHz, GSM 850 and WCDMA Band V refer 824MHz
as it is lowest frequency.


   This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
                                                                  Page 4 of 5


SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD                                                     FCC ID: 2ATDMOVMS-31-5360A


7.2 Simultaneous Transmission MPE
The WLAN and BT share same module and same antenna. They cannot transmit at the same time, no need consider
simultaneous transmission.
The EUT equiped with one WLAN/BT module and one WWAN module. Each module has its own antenna and they
can transmit at the same time. So need consider simultaneous transmission.
According to KDB447498 D01 General RF Exposure Guidance v06 for Transmitters used in mobile exposure conditions
for simultaneous transmission operations;
∑ of MPE ratios ≤ 1.0

                                               Simultaneous Transmission MPE
                                             ∑ MPE ratios                 Limit
               Mode                                                                                                 Results
                                              (mW/cm2)                 (mW/cm2)
        BT + GSM 850                            0.3139                   1.0000                                       Pass
        BT + PCS 1900                           0.1574                   1.0000                                       Pass
    2.4G WLAN + GSM 850                         0.3158                   1.0000                                       Pass
    2.4G WLAN + PCS 1900                        0.1593                   1.0000                                       Pass
     BT + WCDMA Band V                          0.0396                   1.0000                                       Pass
     BT + WCDMA Band II                         0.0396                   1.0000                                       Pass
 2.4G WLAN + WCDMA Band V                       0.0415                   1.0000                                       Pass
 2.4G WLAN + WCDMA Band II                      0.0415                   1.0000                                       Pass


8. 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 5 of 5



Document Created: 2019-06-05 10:18:40
Document Modified: 2019-06-05 10:18:40

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