MPE Calculations

FCC ID: C3K1525

RF Exposure Info

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FCCID_1994301

REPORT NO: 13U14860-1B DATE: JUNE 13, 2013 FCC ID: C3K1525 IC: 3048A-1525 12. MAXIMUM PERMISSIBLE RF EXPOSURE 12.1. FCC RULES §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. 12.2. IC RULES IC Safety Code 6, Section 2.2.1 (a) A person other than an RF and microwave exposed worker shall not be exposed to electromagnetic radiation in a frequency band listed in Column 1 of Table 5, if the field strength exceeds the value given in Column 2 or 3 of Table 5, when averaged spatially and over time, or if the power density exceeds the value given in Column 4 of Table 5, when averaged spatially and over time. Page 173 of 185 UL CCS FORM NO: CCSUP4701H 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

REPORT NO: 13U14860-1B DATE: JUNE 13, 2013 FCC ID: C3K1525 IC: 3048A-1525 Page 174 of 185 UL CCS FORM NO: CCSUP4701H 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

REPORT NO: 13U14860-1B DATE: JUNE 13, 2013 FCC ID: C3K1525 IC: 3048A-1525 12.3. EQUATIONS POWER DENSITY Power density is given by: S = EIRP / (4 * Pi * D^2) Where S = Power density in mW/cm^2 EIRP = Equivalent Isotropic Radiated Power in mW D = Separation distance in cm Power density in units of mW/cm^2 is converted to units of W/m^2 by multiplying by 10. DISTANCE Distance is given by: D = SQRT (EIRP / (4 * Pi * S)) Where D = Separation distance in cm EIRP = Equivalent Isotropic Radiated Power in mW S = Power density in mW/cm^2 SOURCE-BASED DUTY CYCLE Where applicable (for example, multi-slot cell phone applications) a duty cycle factor may be applied. Source-based time-averaged EIRP = (DC / 100) * EIRP Where DC = Duty Cycle in %, as applicable EIRP = Equivalent Isotropic Radiated Power in W Page 175 of 185 UL CCS FORM NO: CCSUP4701H 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

REPORT NO: 13U14860-1B DATE: JUNE 13, 2013 FCC ID: C3K1525 IC: 3048A-1525 MIMO AND COLOCATED TRANSMITTERS (IDENTICAL LIMIT FOR ALL TRANSMITTERS) For multiple chain devices, and colocated transmitters operating simultaneously in frequency bands where the limit is identical, the total power density is calculated using the total EIRP obtained by summing the EIRP (in linear units) of each transmitter. Total EIRP = (EIRP1) + (EIRP2) + ... + (EIRPn) where EIRPx = Source-based time-averaged EIRP of chain x or transmitter x The total EIRP is then used to calculate the Power Density or the Distance as applicable. MIMO AND COLOCATED TRANSMITTERS For multiple colocated transmitters operating simultaneously in frequency bands where different limits apply: The Power Density at the specified separation distance is calculated for each transmitter chain or transmitter. The fraction of the exposure limit is calculated for each chain or transmitter as (Power Density of chain or transmitter) / (Limit applicable to that chain or transmitter). The fractions are summed. Compliance is established if the sum of the fractions is less than or equal to one. Page 176 of 185 UL CCS FORM NO: CCSUP4701H 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

REPORT NO: 13U14860-1B DATE: JUNE 13, 2013 FCC ID: C3K1525 IC: 3048A-1525 12.4. LIMITS AND IC EXEMPTION VARIABLE LIMITS For mobile radio equipment operating in the cellular phone band, the lowest power density limit is calculated using the lowest frequency: 824 MHz / 1500 = 0.55 mW/cm^2 (FCC) 824 MHz / 150 = 5.5 W/m^2 (IC). FIXED LIMITS For operation in the PCS band, the 2.4 GHz band and the 5 GHz bands: From FCC §1.1310 Table 1 (B), the maximum value of S = 1.0 mW/cm^2 From IC Safety Code 6, Section 2.2 Table 5 Column 4, S = 10 W/m^2 INDUSTRY CANADA EXEMPTION RSS-102 Clause 2.5.2 RF exposure evaluation is required if the separation distance between the user and the device’s radiating element is greater than 20 cm, except when the device operates as follows: •below 1.5 GHz and the maximum e.i.r.p. of the device is equal to or less than 2.5 W; •at or above 1.5 GHz and the maximum e.i.r.p. of the device is equal to or less than 5 W. Page 177 of 185 UL CCS FORM NO: CCSUP4701H 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

REPORT NO: 13U14860-1B DATE: JUNE 13, 2013 FCC ID: C3K1525 IC: 3048A-1525 12.5. RF EXPOSURE RESULTS In the table(s) below, Power and Gain are entered in units of dBm and dBi respectively and conversions to linear forms are used for the calculations. Calculation for the Accessory Radio Single Chain and non-colocated transmitters Band Mode Separatio Output Antenna Duty EIRP FCC Power IC n Distance Power Gain Cycle Density Power Density (cm) (dBm) (dBi) (%) (mW) (mW/cm^2) (W/m^2) 2.4 GHz WLAN 20 11.50 2.20 100.0 23.4 0.005 0.05 5 GHz WLAN 20 11.50 3.14 100.0 29.1 0.006 0.06 Worst Case calculation of both Radios Multiple chain or colocated transmitters Band Mode Chain Separatio Output Antenna Duty EIRP FCC Power IC for n Distance Power Gain Cycle Density Power Density MIMO (cm) (dBm) (dBi) (%) (mW) (mW/cm^2) (W/m^2) Accessory 5 GHz 1 11.50 3.14 100.0 29.1 WLAN Network 2.4 GHz 2 17.50 3.38 100.0 122.5 WLAN Network 2.4 GHz 3 17.50 4.61 100.0 162.6 WLAN Combined 20 331.2 0.066 0.66 Note: antenna gains in the tables above are worst-case gains for individual chains The device operates above 1.5 GHz with a maximum EIRP less than or equal to 5 Watts as a mobile device with a minimum separation distance of 20 cm, therefore it is exempt from routine RF Exposure Evaluation under RSS-102. Page 178 of 185 UL CCS FORM NO: CCSUP4701H 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.


Document Created: 2019-09-08 01:34:41
Document Modified: 2019-09-08 01:34:41
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