BHAMS001 Motion Sensor RF Exposure Info RF exposure evaluation Ring LLC

Ring LLC Motion Sensor

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.
FCC ID: 2AEUPBHAMS001
Maximum Permissible Exposure Report
1. Product Information
FCC ID:
Product name
Model number
Power supply
Modulation Type
Channel Number
Channel Spacing
Antenna Type
Antenna Gain
Hardware version
Software version
Bluetooth Operation frequency
LoRa Operation frequency
LoRa Channel number
LoRa Modulation Type
Exposure category
EUT Type
Device Type
2AEUPBHAMS001
Motion Sensor
5SM1S8
DC 4.5 by Battery (3*AAA)
GFSK for Bluetooth V5.0 (BT LE)
40 channels for Bluetooth V5.0 (BT LE)
2MHz for Bluetooth V5.0 (BT LE)
PCB Antenna for Bluetooth
Internal Antenna for LoRa
1.1 dBi (Max) for Bluetooth
1.1 dBi (Max) for LoRa
C20 V2.2 20181011
0.7.5
2402 MHz- 2480 MHz
903 MHz - 927.5 MHz
26
CSS
General population/uncontrolled environment
Production Unit
Mobile Device
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
This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
Page 1 of 3
SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.
FCC ID: 2AEUPBHAMS001
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) *
3.0 – 30
1842/f
4.89/f
(900/f2)*
30 – 300
61.4
0.163
1.0
300 – 1500
f/300
1500 – 100,000
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
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
5SM1S8 can only use antennas certificated as follows provided by manufacturer;
Internal
Identification
Antenna 0
Antenna 1
Antenna type and
antenna number
PCB Antenna
Internal Antenna
Operate frequency band
2000 MHz – 2500 MHz
900 MHz – 1000 MHz
Maximum antenna
gain
1.1 dBi
1.1 dBi
Note
BT Antenna
ROLA Antenna
6. Conducted Power
Mode
GFSK (BT LE)
LORA
Channel
19
39
13
26
Frequency (MHz)
2402
2440
2480
903.0
915.0
927.5
Maximum Peak Power (dBm)
0.298
0.510
-0.502
15.170
16.459
16.719
This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
Page 2 of 3
SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD.
FCC ID: 2AEUPBHAMS001
7. Manufacturing Tolerance
GFSK (BT LE) (Peak)
Channel 0
Channel 19
1.0
1.0
1.0
1.0
LoRa (Peak)
Channel 1
Channel 13
16.0
17.0
1.0
1.0
Channel
Target (dBm)
Tolerance ±(dB)
Channel
Target (dBm)
Tolerance ±(dB)
Channel 39
1.0
Channel 26
17.0
1.0
8. Measurement Results
8.1 Standalone MPE Evaluation
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.
[Antenna 0]
Modulation Type
GFSK (BT LE)
[Antenna 1]
Modulation Type
LORA
Output power
dBm
mW
2.00
1.5849
Output power
dBm
mW
18.00
63.0957
Antenna
Gain
(dBi)
1.10
Antenna
Gain
(linear)
1.2882
Antenna
Gain
(dBi)
1.10
Antenna
Gain
(linear)
1.2882
Duty
Cycle
MPE
(mW/cm2)
100%
0.0004
Duty
Cycle
MPE
(mW/cm2)
100%
0.0162
MPE
Limits
(mW/cm2)
1.0000
MPE
Limits
(mW/cm2)
0.6013
Remark:
1. Output power including tune-up tolerance;
2. MPE evaluate distance is 20cm from user manual provide by manufacturer;
8.2 Simultaneous Transmission MPE
The sample support one BT and one LoRa modular also share difference antennas, they can transmit at same time,
need consider simultaneous transmission;
[Antenna 0 + Antenna 1]
MPE Antenna 0 Ratios
0.0003
MPE Antenna 1 Ratios
0.0269
∑MPE ratios
0.1
Limit
1.0
Results
PASS
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.
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Document ID4128760
Application IDAtOdp0NiH9npqNm1kekzJA==
Document DescriptionRF exposure evaluation
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
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Date Submitted2019-01-03 00:00:00
Date Available2019-01-03 00:00:00
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Document TitleRF exposure evaluation
Document CreatorAcrobat PDFMaker 11 for Word
Document Author: User

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