MPE Evaluation

FCC ID: N7NMC7750-L

Test Report

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FCCID_1670772

MPE Evaluation for MC7750 Module 2/28/2012

1. Introduction This Maximum Permissive Exposure (MPE) report demonstrates compliance for MC7750 module with FCC CFR 47 §2.1091 and IC RSS-102 for collocated simultaneous transmission in mobile exposure conditions. The MPE analysis is valid for transmitters operating within the parameters defined in Table 3 and limited for Canada / US bands only. The general population/uncontrolled exposure limits are applicable to situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment may not be made fully aware of the potential for exposure or cannot exercise control over their exposure. A separation distance of 20cm or more shall be maintained between the end user and each WWAN, WiMAX, WLAN and Bluetooth transmitting antennas. Portable user conditions or additional collocated modules not allowed based on this RF exposure analysis require a Class II permissive change and updated MPE or SAR report. 2. RF Exposure Limits and Equations FCC RULES: According to FCC OET Bulletin 65 Supplement C, 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. Table 1 : Limits for Maximum Permissible Exposure (MPE)

IC RULES: IC has adopted the RF field strength limits established in Health Canada’s RF exposure guideline. The limits are shown in Table 2 below per RSS-102. Table 2: RF Field Strength Limits for Devices Used by the General Public (Uncontrolled Environment) EQUATIONS: Power density is given by: S = EIRP / (4 * Pi * D^2) where S = Power density (mW/cm^2) EIRP = Equivalent Isotropic Radiated Power (mW) D = Separation distance (cm)

3. Product Declarations Maximum Conducted Power Equipment Max Transmitter Transmitter Max Antenna Mode Category Duty Cycle Range (MHz) Gain (dBi) (dBm) (W) 824 - 849 33.0 2.00 5.0 GPRS Class 10 25% 1850 - 1910 30.0 1.00 3.0 824 - 849 31.2 1.32 5.0 GPRS Class 11 37.5% 1850 - 1910 28.2 0.66 3.0 824 - 849 30.0 1.00 5.0 GPRS Class 12 50.0% 1850 - 1910 27.0 0.50 3.0 824 - 849 28.0 0.63 5.0 EDGE Class 10 25% 1850 - 1910 27.0 0.50 3.0 824 - 849 26.2 0.42 5.0 EDGE Class 11 37.5% 1850 - 1910 25.2 0.33 3.0 824 - 849 25.0 0.32 5.0 EDGE Class 12 50.0% 1850 - 1910 24.0 0.25 3.0 HSDPA 824 - 849 24.0 0.25 5.0 UMTS 100% HSUPA 1850 - 1910 24.0 0.25 3.0 LTE Band 13 100% 777 - 787 24.0 0.25 7.0 824 - 849 25.0 0.32 5.0 CDMA EVDOrA 100% 1850 - 1910 25.0 0.32 3.0 Table 3: WWAN Transmitter Declarations This MPE analysis is applicable to any collocated transmitters with transmit power less than or equal to 29.0dBm for WLAN, less than or equal to 27.0dBm for WiMAX, and less than or equal to 15.0dBm for BT. Specific FCC IDs for those devices are not necessary or identified in this analysis providing they are classified as mobile transmitters. A 100% duty cycle is used for calculations to present a worse-case analysis.

4. MPE Calculations The WiMAX, WLAN, and BT transmit power and antenna gain parameters represent a maximum transmit power for a given frequency band. Integration of a WiMAX, WLAN, and BT module that exceeds the parameters requires a new FCC authorization or permissive change application. A maximum antenna gain of 4dBi for WLAN and 5 dBi for WiMAX/BT has been assumed for all collocated antennas. Table 3 summarizes transmitter parameters associated with this analysis.

4.1. Individual Transmitter Calculations The power density calculations for the individual transmitters per wireless technology at an exposure separation distance of 20cm are shown in Table 4. For frequency dependent limit, the lowest transmitter frequency was used to represent the lowest MPE limit in this analysis (eg. 824MHz = 0.549mW/cm2) The WiMAX, WLAN, and BT power levels listed represent the worse-case scenario for corresponding frequency ranges given. Maximum Maximum Maximum Power Average FCC MPE Frequency Conducted Conducted Antenna Duty Average Density @ Technology EIRP Limit (MHz) Power Power Gain Cycle EIRP (mW) 20cm (dBm) (mW/cm^2) (dBm) (W) (dBi) (mW/cm^2) GPRS 2 824 - 849 33 2.00 5 0.25 31.98 1577.393 0.314 0.549 UL GPRS 3 824 - 849 31.2 1.32 5 0.375 31.94 1563.260 0.311 0.549 UL GPRS 4 824 - 849 30 1.00 5 0.5 31.99 1581.139 0.315 0.549 UL UMTS 824 - 849 24 0.25 5 1 29.00 794.328 0.158 0.549 CDMA 824 - 849 25 0.32 5 1 30.00 1000.000 0.199 0.549 GPRS 2 1850 - 30 1.00 3 0.25 26.98 498.816 0.099 1.000 UL 1910 GPRS 3 1850 - 28.2 0.66 3 0.375 26.94 494.346 0.098 1.000 UL 1910 GPRS 4 1850 - 27 0.50 3 0.5 26.99 500.000 0.099 1.000 UL 1910 1850 - UMTS 24 0.25 3 1 27.00 501.187 0.100 1.000 1910 1850 - CDMA 25 0.32 3 1 28.00 630.957 0.126 1.000 1910 LTE 777 - 787 24 0.25 7 1 31.00 1258.925 0.250 0.469 2400 - WLAN 29 0.79 4 1 33.00 1995.262 0.397 1.000 2500 5150 - WLAN 29 0.79 4 1 33.00 1995.262 0.397 1.000 5850 2300 - WiMAX 27 0.50 5 1 32.00 1584.893 0.315 1.000 2400 2500 - WiMAX 27 0.50 5 1 32.00 1584.893 0.315 1.000 2700 3300 - WiMAX 27 0.50 5 1 32.00 1584.893 0.315 1.000 3800 2400 - BT 15 0.032 5 1 20.00 100.000 0.020 1.000 2500 Table 4: WWAN, WiMAX, WLAN, and BT Individual MPE Calculation

4.2. Collocated MPE Calculation Per OET Bulletin 65, when RF sources have difference frequencies, the fraction of the FCC power density limit shall be determined and the sum of all fractional components shall be less than 1. WLAN/WiMAX WLAN/WiMAX WLAN/WiMAX Pd BT Pd + Limit Band (GHz) (mW/cm^2) (mW/cm^2) BT Pd (mW/cm^2) 2.3 - 2.4 0.315 0.335 2.4 - 2.5 0.397 0.417 2.5 - 2.7 0.315 0.020 0.335 1.000 3.3 3.8 0.315 0.335 5.15 - 5.85 0.397 0.417 Table 5: WLAN/WiMAX + BT Collocated MPE Calculation (850 MHz (WLAN / WWAN WLAN / WiMAX + WLAN / WiMAX FCC MPE + 850 MHz FCC MPE (WWAN 850 WLAN / WiMAX + Limit BT Pd) WWAN Pd Limit MHz) / MPE Limit Pass/Fail WiMAX Band (GHz) BT Pd (mW/cm^2) / (mW/cm^2) (mW/cm^2) Limit) + (mW/cm^2) (MPE BT Limit) fraction) 2.3 - 2.4 0.335 0.335 0.908 Pass 2.4 - 2.5 0.417 0.417 0.989 Pass 1.000 0.315 0.549 0.573 1.000 2.5 - 2.7 0.335 0.335 0.908 Pass 3.3 - 3.8 0.335 0.335 0.908 Pass 5.15 - 5.85 0.417 0.417 0.989 Pass Table 6: WWAN 850MHz + WLAN / WiMAX + BT Collocated MPE Calculation

(1900 (WLAN / MHz WLAN / WiMAX WWAN WLAN / WiMAX FCC MPE + 1900 MHz FCC MPE (WWAN 1900 + WiMAX + Limit BT Pd) WWAN Pd Limit MHz) / MPE WLAN / Limit Pass/Fail Band BT Pd (mW/cm^2) / (mW/cm^2) (mW/cm^2) Limit) WiMAX (GHz) (mW/cm^2) (MPE + Limit) BT fraction) 2.3 - 2.4 0.335 0.335 0.461 Pass 2.4 - 2.5 0.417 0.417 0.542 Pass 1.000 0.126 1.000 0.126 1.000 2.5 - 2.7 0.335 0.335 0.461 Pass 3.3 - 3.8 0.335 0.335 0.461 Pass 5.15 - 5.85 0.417 0.417 0.542 Pass Table 7: WWAN 1900MHz + WLAN / WiMAX + BT Collocated MPE Calculation (WLAN / (700 MHz WLAN / WIMAX WLAN / (WWAN WWAN + WiMAX FCC MPE + 700 MHz WIMAX FCC MPE Limit 700 MHz) / WLAN / + Limit BT Pd) WWAN Pd Limit Pass/Fail Band (mW/cm^2) MPE WiMAX + BT Pd (mW/cm^2) / (mW/cm^2) (GHz) Limit) BT (mW/cm^2) (MPE fraction) Limit) 2.3 - 2.4 0.335 0.335 0.869 Pass 2.4 - 2.5 0.417 0.417 0.950 Pass 2.5 - 2.7 0.335 1.000 0.335 0.250 0.469 0.534 0.869 1.000 Pass 3.3 - 3.8 0.335 0.335 0.869 Pass 5.15 - 0.417 0.417 0.950 Pass 5.85 Table 8: WWAN 700MHz + WLAN / WiMAX + BT Collocated MPE Calculation

5. Conclusion The analysis concludes that the MC7750 module, when transmitting simultaneously with other co-located radio transmitters within a host device, is compliant with the FCC/IC RF exposure requirements in mobile-only exposure condition, provided the conducted power and antenna gain do not exceed the limits in Table 9 for each given frequency band per wireless technology. Maximum Maximum Technology Frequency (MHz) Conducted Power Antenna Gain (dBm) (dBi) GPRS/EDGE 824 - 849 33 5 UMTS 824 - 849 24 5 MC7700 module CDMA 824 - 849 25 5 GPRS/EDGE 1850 - 1910 30 3 UMTS 1850 - 1910 24 3 CDMA 1850 - 1910 25 3 LTE 777 - 787 24 7 WLAN 2400 - 2500 29 4 WLAN 5150 - 5850 29 4 Transmitters Collocated WiMAX 2300 - 2400 27 5 WiMAX 2500 - 2700 27 5 WiMAX 3300 - 3800 27 5 BT 2400 - 2500 15 5 Table 9: Summary of Maximum Conducted Power and Antenna Gain


Document Created: 2012-02-28 16:06:59
Document Modified: 2012-02-28 16:06:59
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