MPE for BLE

FCC ID: XFF-GWY20

RF Exposure Info

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FCCID_4129856

FCC Part 15, Subpart C, Section 15.247 – DTS Page 40 of 43 Multiprotocol Gateway, Model(s): GWY20 FCC ID: XFF-GWY20 5.6. RF EXPOSURE REQUIRMENTS [§§ 15.247(i), 1.1310 & 2.1091] 5.6.1. Limits § 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b). Limits for Maximum Permissible Exposure (MPE) Frequency range Electric field strength Magnetic field strength Power density Averaging time (MHz) (V/m) (A/m) (mW/cm2) (minutes) (A) Limits for Occupational/Controlled Exposures 0.3-3.0 614 1.63 *(100) 6 2 3.0-30 1842/f 4.89/f *(900/f ) 6 30-300 61.4 0.163 1.0 6 300-1500 f/300 6 1500-100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3-1.34 614 1.63 *(100) 30 2 1.34-30 824/f 2.19/f *(180/f ) 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 Note 1: Occupational/controlled limits apply in situations in which persons are exposed as a consequence of their employment provided those persons are fully aware of the potential for exposure and can exercise control over their exposure. Limits for occupational/controlled exposure also apply in situations when an individual is transient through a location where occupational/controlled limits apply provided he or she is made aware of the potential for exposure. Note 2: General population/uncontrolled exposures apply in situations in which the general public may be exposed, or in which persons that are exposed as a consequence of their employment may not be fully aware of the potential for exposure or can not exercise control over their exposure. ULTRATECH GROUP OF LABS File #: 18MMBN004_FCC15C247B 3000 Bristol Circle, Oakville, Ontario, Canada L6H 6G4 November 29, 2018 Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vic@ultratech-labs.com, Website: http://www.ultratech-labs.com All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)

FCC Part 15, Subpart C, Section 15.247 – DTS Page 41 of 43 Multiprotocol Gateway, Model(s): GWY20 FCC ID: XFF-GWY20 5.6.2. Method of Measurements Calculation Method of Power Density/RF Safety Distance: PG EIRP S  4  r 2 4  r 2 Where, P: power input to the antenna in mW EIRP: Equivalent (effective) isotropic radiated power. S: power density mW/cm2 G: numeric gain of antenna relative to isotropic radiator r: distance to centre of radiation in cm 5.6.3. RF Evaluation Remark(s): The EUT contained ZigBee/ BLE and WiFi radio modules with the following operating conditions:  BLE and WiFi may transmit at the same time  Zigbee and WiFi may transmit at the same time  BLE and Zigbee will NOT transmit at the same time Pursuant to KDB 447498 D01 General RF Exposure Guidance v06, Section 7.2: Simultaneous transmission MPE test exclusion applies when the sum of the MPE ratios for all simultaneously transmitting antennas incorporated in a host device is ≤ 1.0, according to calculated/estimated, numerically modeled, or measured field strengths or power density. The sum of the MPE ratios for all simultaneously transmitting antennas incorporated in the EUT is ≤ 1.0 as calculated in the following table. EUT Co-located MPE for BLE/Zigbee with WiFi Radio Power Frequency Evaluation Power Max. EIRP Max. EIRP Density Power Transmitter Band Frequency Distance Density (dBm) (mW) 2 Limit Density MPE (MHz) (cm) (mW/cm ) 2 (mW/cm ) Ratio BLE 2402-2480 2402 25.53 357.273 20 0.071 1.0 0.071 Zigbee 2405-2480 2405 25.47 352.371 20 0.070 1.0 0.070 802.11b 2412-2462 2412 28.36 685.488 20 0.136 1.0 0.136 802.11g 2412-2462 2412 28.83 763.836 20 0.152 1.0 0.152 802.11n 2412-2462 2412 28.65 732.825 20 0.146 1.0 0.146 Worst Case Combination (BLE with WiFi 802.11g mode) : 0.223 ULTRATECH GROUP OF LABS File #: 18MMBN004_FCC15C247B 3000 Bristol Circle, Oakville, Ontario, Canada L6H 6G4 November 29, 2018 Tel. #: 905-829-1570, Fax. #: 905-829-8050, Email: vic@ultratech-labs.com, Website: http://www.ultratech-labs.com All test results contained in this engineering test report are traceable to National Institute of Standards and Technology (NIST)


Document Created: 2018-11-29 10:51:23
Document Modified: 2018-11-29 10:51:23
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