RF Exposure 5 GHz

FCC ID: Q9DARUBA6061

RF Exposure Info

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FCCID_483418

Title: Test of Aruba Networks AP60 802.11a/b/g Access Point To: FCC 47 CFR Part 15.247,15.407,IC RSS-210 Serial #: TUVR24-A4 REV E Issue Date: 3rd September 2004 Page: 43 of 102 4.2.2.6 RF Radiation Exposure FCC, Part 15 Subpart C §15.247(f) Industry Canada RSS-210 §6.2.2(q1)(iv)(g) Calculations for Maximum Permissible Exposure Levels Given E = √(30 * P * G) / d and S = E2 / 3770 where E = field strength in volts/meter P = power in watts G = numeric antenna gain d = distance in meters S = power density in milliwatts / square centimeter Combining and rearranging the terms to express the distance as a function of the variables, yields: d = √(30 * P * G) / (3770 * S) Rearrange to milliwatts and centimeters P(mw) = P(watts) / 1000 d(cm) = d(m) * 100 yields d = 100 * √(30 * (P / 1000) * G) / (3770 * S) d = 0.282 * √(P * G / S) where d = distance in centimetres P = Power in mW G = Numeric Antenna Gain S = Power Density in centimetres2 Substituting the logarithmic form of power and gain using: P(mW) = 10 ^ (P(dBm)/10) and G(numeric) = 10 ^ (G(dBi) /10)

Title: Test of Aruba Networks AP60 802.11a/b/g Access Point To: FCC 47 CFR Part 15.247,15.407,IC RSS-210 Serial #: TUVR24-A4 REV E Issue Date: 3rd September 2004 Page: 44 of 102 Yields: d = 0.282 * 10 ^ ((P + G) / 20) /√ S where d = MPE distance in centimetres P = Power in dBm G = Antenna Gain in dBi S = Power Density Limit in mW / centimetres2 (Limit S = 1mW / cm2 from §1.310 Table 1) Maximum output power observed from power measurements – +16.91dBm Maximum antenna gain – 14dBi Power Maximum Measured Antenna MPE Density Limit Output Power (dBm) Gain Distance (mW / cm2) (dBi) (cm) 1 16.91 14 9.9 Specification Maximum Permissible Exposure Limits §15.247 (b)(5) Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency levels in excess of the Commission’s guidelines. See §1.1307 (b)(1) of this chapter. Limit S = 1mW / cm2 from 1.310 Table 1 Note: for mobile or fixed location transmitters the minimum separation distance is 20cm, even if calculations indicate the MPE distance to be less. Traceability METHOD TEST EQUIPMENT USED Measurements were made per work instruction WI-01 Bar 1, PMtr 1, PSnsr 1, coupler, 3dB & 30dB ‘Measuring RF Output Power’ pads Laboratory Measurement Uncertainty for Power Measurements Measurement uncertainty (dB) ±1.33


Document Created: 2004-09-09 13:52:02
Document Modified: 2004-09-09 13:52:02
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