EUT MPE Evaluation

FCC ID: NS9N920X2

RF Exposure Info

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FCCID_4142584

FCC Part 15, Subpart C, Section 15.247 – FHSS Page 72 of 75 900MHz OEM Wireless Module, Model n920X2 FCC ID: NS9N920X2 5.6. RF EXPOSURE REQUIRMENTS [§§ 15.247(i), 1.1310 & 2.1091] § 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. 5.6.1. 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 ULTRATECH GROUP OF LABS File #: 19MCRS109_FCC15C247 3000 Bristol Circle, Oakville, Ontario, Canada L6H 6G4 January 22, 2019 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 – FHSS Page 73 of 75 900MHz OEM Wireless Module, Model n920X2 FCC ID: NS9N920X2 5.6.2. RF Evaluation 5.6.2.1. Standalone Evaluation Frequency EIRP EIRP Power Density, S MPE Limit Margin Distance, r 2 (MHz) (dBm) (mW) (mW/cm ) (mW/cm2) (mW/cm2) (cm) 902.4 36 3981.072 35 0.259 0.602 -0.343 5.6.2.2. Co-location 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. Co-location will only applies to EUT with 3 dBi dipole antenna, worst case EIRP of 33 dBm will be used in co- location at the minimum 35 cm evaluation separation distance required by the operating configurations and exposure conditions of the host device. The maximum calculated MPE ratio of the EUT with 3 dBi dipole antenna (rubber ducky antenna) Power FCC MPE Frequency EUT EIRP EUT EIRP Evaluation Density Limit MPE Ratio (MHz) (dBm) (mW) Distance (cm) 2 (mW/cm ) (mW/cm2) 902.4 33 1995.262 35 0.130 0.602 0.216 The maximum calculated MPE ratio for the EUT with 3 dBi dipole antenna is 0.216, this configuration can be co- located with other antennas provided the sum of the MPE ratios for all the other simultaneous transmitting antennas incorporated in a host device is < 1.0 - 0.216 < 0.784. The following table addresses the co-location of the EUT with 3 dBi antenna with the specified radio modules. EUT with 3 dBi dipole antenna co-location with radio module identified in this table Evaluation Power FCC MPE Ratio of Frequency EIRP EIRP MPE Sum of *Radio Module Distance Density MPE Limit EUT with 2.5 Verdict (MHz) (dBm) (mW) Ratio MPE Ratio (cm) (mW/cm2) (mW/cm2) dBi antenna LE910NA V2 LTE/3G Module 699.0 30.63 1156.112 35 0.075 0.466 0.161 0.216 0.377 Compliant (FCC ID: RI7LE910NAV2, IC: 5131A-LE910NAV2) LM940 Module (FCC ID: RI7LM940 2307.5 34.00 2511.886 35 0.163 1.000 0.163 0.216 0.379 Compliant IC: 5131A-LM940) SARA-R410M LTE Cat-M1 Module 1850.0 32.12 1629.296 35 0.106 1.000 0.106 0.216 0.322 Compliant (FCC ID: XPY2AGQN4NNN, IC: 8595A-2AGQN4NNN) L850 LTE Module (FCC ID: ZMOL850GL, 826.4 -- 501.19 35 0.033 0.551 0.060 0.216 0.276 Compliant IC: 21374‐L850GL) * The test data of the radio modules represented in this table is the worst-case configuration (maximum MPE ratio) derived from the original radio modules MPE reports. Refer to these reports for detail. ULTRATECH GROUP OF LABS File #: 19MCRS109_FCC15C247 3000 Bristol Circle, Oakville, Ontario, Canada L6H 6G4 January 22, 2019 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: 2019-03-26 00:51:47
Document Modified: 2019-03-26 00:51:47
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