MPE Calculations

FCC ID: X7CAP8120

RF Exposure Info

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FCCID_1532848

EMC Test Data Client: Avaya Job Number: J81820 T-Log Number: T82013 Model: AP 8120 with 2 external Antenna (Class II Permissive change) Account Manager: Christine Contact: Vipin Naik Standard: FCC 15.247 Class: N/A Maximum Permissible Exposure Test Specific Details The objective of this test session is to perform final qualification testing of the EUT with respect to the Objective: specification listed above. Date of Test: 6/15/2011 Test Engineer: Mark Hill General Test Configuration Calculation uses the free space transmission formula: S = (PG)/(4 πd 2) Where: S is power density (W/m2), P is output power (W), G is antenna gain relative to isotropic, d is separation distance from the transmitting antenna (m). Summary of Results Device complies with Power Density requirements at No 20cm separation: Power Density (mW/cm2) @ 20cm: 1.548 If not, required separation distance (in cm): 24.9 Modifications Made During Testing No modifications were made to the EUT during testing Deviations From The Standard No deviations were made from the requirements of the standard. T82013 (DTS_ETCB) MPE Calc Page 1 of 3

EMC Test Data Client: Avaya Job Number: J81820 T-Log Number: T82013 Model: AP 8120 with 2 external Antenna (Class II Permissive change) Account Manager: Christine Contact: Vipin Naik Standard: FCC 15.247 Class: N/A Run #1: Two channel operation, one 2.4GHz and 5GHz channel, worse case Use: General Use 2.4GHz - 8dBi, 5GHz - 10.7dBi Antenna: Effective Gain for Mimo: 2.4GHz - 11dBi, 5GHz - 13.7dBi The system allows for one radio to operate in the 2.4GHz band and one radio to operate in the 5GHz bands simultaneously. It prevents both radios operating in the same band at the same time. Below calculations include worse case from original filing and this C2PC. Maximum eirp is calculated as follows: Uses the average power for each channel (where given), otherwise uses the peak power Used for Multiple Transmitters One 2.4GHz and one 5.15-5.25GHz operation Output Power EIRP Total EIRP Antenna Channels Channels Band Mode Peak Average gain (Max) dBm W Available Used W dBm 2400 - OFDM 24.9 - 11.0 35.9 3.890 2483.5 11 1 3.890 35.90 2401 - CCK - 18.8 8.0 26.8 0.479 2483.5 5150-5250 OFDM - 9.0 13.7 22.7 0.186 4 1 0.186 22.70 5250-5350 OFDM - 9.1 13.7 22.8 0.191 4 0 - - 5470-5725 OFDM - 15.9 13.7 29.6 0.912 4 0 - - 5725 - OFDM 22.2 - 13.7 35.9 3.890 5 0 - - 5850 Totals: 2 4.077 36.10 One 2.4GHz and one 5.25-5.35GHz operation Output Power Antenna EIRP Channels Channels Total EIRP Band Mode Peak Average gain (Max) dBm W Available Used W dBm 2400 - OFDM 24.9 - 11.0 35.9 3.890 2483.5 11 1 3.890 35.90 2401 - CCK - 18.8 8.0 26.8 0.479 2483.5 5150-5250 OFDM - 9.0 13.7 22.7 0.186 4 0 - - 5250-5350 OFDM - 9.1 13.7 22.8 0.191 4 1 0.191 22.80 5470-5725 OFDM - 15.9 13.7 29.6 0.912 4 0 - - 5725 - OFDM 22.2 - 13.7 35.9 3.890 5 0 - - 5850 Totals: 2 4.081 36.11 T82013 (DTS_ETCB) MPE Calc Page 2 of 3

EMC Test Data Client: Avaya Job Number: J81820 T-Log Number: T82013 Model: AP 8120 with 2 external Antenna (Class II Permissive change) Account Manager: Christine Contact: Vipin Naik Standard: FCC 15.247 Class: N/A One 2.4GHz and one 5.4-5.7GHz operation Output Power Antenna EIRP Channels Channels Total EIRP Band Mode Peak Average gain (Max) dBm W Available Used W dBm 2400 - OFDM 24.9 - 11.0 35.9 3.890 2483.5 11 1 3.890 35.90 2401 - CCK - 18.8 8.0 26.8 0.479 2483.5 5150-5250 OFDM - 0.0 0.001 4 1 0.001 0.00 5250-5350 OFDM - 9.1 13.7 22.8 0.191 4 0 - - 5470-5725 OFDM - 15.9 13.7 29.6 0.912 4 1 0.912 29.60 5725 - OFDM 22.2 - 13.7 35.9 3.890 5 0 - - 5850 Totals: 3 4.803 36.82 One 2.4GHz and one 5.7-5.8GHz operation Output Power Antenna EIRP Channels Channels Total EIRP Band Mode Peak Average gain (Max) dBm W Available Used W dBm 2400 - OFDM 24.9 - 11.0 35.9 3.890 2483.5 11 1 3.890 35.90 2401 - CCK - 18.8 8.0 26.8 0.479 2483.5 5150-5250 OFDM - 0.0 0.001 4 0 - - 5250-5350 OFDM - 9.1 13.7 22.8 0.191 4 0 - - 5470-5725 OFDM - 15.9 13.7 29.6 0.912 4 0 - - 5725 - OFDM 22.2 - 13.7 35.9 3.890 5 1 3.890 35.90 5850 Totals: 2 7.781 38.91 Worse Case Condition Power Density (S) MPE Limit Distance where EIRP at 20 cm at 20 cm S <= MPE Limit mW mW/cm^2 mW/cm^2 cm 7780.9 1.548 1.000 24.9 T82013 (DTS_ETCB) MPE Calc Page 3 of 3


Document Created: 2011-06-23 20:30:35
Document Modified: 2011-06-23 20:30:35
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