RF Exposure MPE

FCC ID: TE7MRWR54XGV1

RF Exposure Info

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FCCID_746408

Compliance Certification Services (Shenzhen) Inc. Report No: SZ060614B06-RU FCC ID: TE7MRWR54XGV1 Date of Issue: January 09, 2007 RADIO FREQUENCY EXPOSURE LIMIT 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 energy levels in excess of the Commission's guidelines. See §15.247(b)(4) and §1.1307(b)(1) of this chapter. EUT Specification EUT 54M Wireless Router WLAN: 2.412GHz ~ 2.462GHz Frequency band WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz (Operating) WLAN: 5.745GHz ~ 5825GHz Others Portable (<20cm separation) Device category Mobile (>20cm separation) Others __________________________ Occupational/Controlled exposure (S = 5mW/cm2) Exposure classification General Population/Uncontrolled exposure (S=1mW/cm2) Single antenna Multiple antennas Antenna diversity Tx diversity Rx diversity Tx/Rx diversity Max. output power 23.36 dBm (216.77mW) Antenna gain (Max) 5 dBi (Numeric gain: 3.16) MPE Evaluation Evaluation applied SAR Evaluation Note: 1. The maximum output power is 23.36 dBm (216.77mW) at 2462MHz (with 3.16 numeric antenna gain.) 2. For mobile or fixed location transmitters, no SAR consideration applied. The minimum separation generally be used is at least 20 cm, even if the calculations indicate that the MPE distance would be lesser. TEST RESULT No non-compliance noted.

Compliance Certification Services (Shenzhen) Inc. Report No: SZ060614B06-RU FCC ID: TE7MRWR54XGV1 Date of Issue: January 09, 2007 Calculation 30 × P × G E2 Given E= & S= d 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 equations and re-arranging the terms to express the distance as a function of the remaining variables yields: 30 × P × G d= 3770 × S Changing to units of mW and cm, using: P (mW) = P (W) / 1000 and d (cm) =100 * d (m) Yields 30 × ( P / 1000) × G P×G d = 100 × = 0.282 × 3770 × S S Where d = distance in cm P = Power in mW G = Numeric antenna gain S = Power Density in mW / cm^2 Substituting the logarithmic form of power and gain using: P (mW) = 10 ^ (P (dBm) / 10) and G (numeric) = 10 ^ (G (dBi) / 10) Yields ( P +G ) 10 20 d = 0.282 × 20 Equation 1 Where d = MPE safe distance in cm

Compliance Certification Services (Shenzhen) Inc. Report No: SZ060614B06-RU FCC ID: TE7MRWR54XGV1 Date of Issue: January 09, 2007 P = Power in dBm G = Antenna Gain in dBi S = Power Density Limit in mW / cm^2 Maximum Permissible Exposure (2.4 GHz Band) S = Maximum power density (mW/cm2) P = Power input to the antenna (mW). = 216.77 G = Numeric power gain of the antenna = 3.16 R = Distance to the center of the radiation of the antenna (20cm = limit for MPE) = 0.022 The maximum permissible exposure (MPE) for the general population is 1.00 mW/cm2. ( 216.77 * 3.16 ) / ( 4π * 0.022 ) = 0.136 mW/cm2 The power density at 20cm does not exceed the 1 mW/cm2 limit. Therefore, the exposure condition is compliant with FCC rules.


Document Created: 2007-01-09 15:35:26
Document Modified: 2007-01-09 15:35:26
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