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

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