RF Exposure Info

FCC ID: I88VMG1312B10A

RF Exposure Info

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FCCID_1620870

CERPASS TECHNOLOGY CORP. Report No.: SEFI1111084 Radio frequency exposure LIMIT According to §15.247(i), 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 § 1.1307(b)(1) of this chapter. EUT Specification Dual WAN VDSL2 Gateway with 802.11n; EUT Wireless N VDSL2 4-ports Gateway with USB WLAN: 2.412GHz ~ 2.462GHz Frequency band WLAN: 5.725GHz ~ 5.850GHz (Operating) Bluetooth: 2.402GHz ~ 2.480 GHz Portable (<20cm separation) Device category Mobile (>20cm separation) 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 802.11b: 21.21 dBm (132.13 mW) 802.11g: 22.12 dBm (162.93 mW) 802.11n (20MHz): Chain0:20.74 dBm (118.58 mW) Max. output power Chain1:19.62 dBm (91.62 mW) 802.11n (40MHz): Chain0:22.40 dBm (173.78 mW) Chain1:21.20 dBm (131.83 mW) Chain0:5.00 dBi (Numeric gain:3.162 ) Antenna gain (Max) Chain1:5.00 dBi(Numeric gain: 3.162) MPE Evaluation* Evaluation applied SAR Evaluation N/A Remark: 1. The maximum output power is 22.40 dBm (173.78 mW) at 2452 MHz (withnumeric 3.162 antenna gain.) 2. DTS device is not subject to routine RF evaluation; MPE estimate is used to justify the compliance. 3. For mobile or fixed location transmitters, no SAR consideration applied. The maximum power density is 1.0 mW/cm2 even if the calculation indicates that the power density would be larger. Cerpass Technology Corp. Issued date : Jan 10,2012 Tel: 86-512-6917-5888 Fax: 86-512-6917-5666 Page No. : 1 of 3

CERPASS TECHNOLOGY CORP. Report No.: SEFI1111084 TEST RESULTS No non-compliance noted. 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 S= 3770d 2 Changing to units of mW and cm, using: P (mW) = P (W) / 1000 and d (cm) = d(m) / 100 Yields 30 × (P / 1000) × G P×G S= = 0.0796 × 2 Equation 1 3770 × (d / 100) 2 d Where d = Distance in cm P = Power in mW G = Numeric antenna gain S = Power density in mW / cm2 Cerpass Technology Corp. Issued date : Jan 10,2012 Tel: 86-512-6917-5888 Fax: 86-512-6917-5666 Page No. : 2 of 3

CERPASS TECHNOLOGY CORP. Report No.: SEFI1111084 Maximum Permissible Exposure Max. Conducted Power Frequency Antenna Distance Limit Modulation Mode output density band (MHz) gain (dBi) (cm) (mW/cm2) power(dBm) (mW/cm2) 802.11b 2412-2462 21.21 5.00 20 0.083 1 802.11g 2412-2462 22.12 5.00 20 0.103 1 802.11n(20MHz)(Chain0) 2412-2462 20.74 5.00 20 0.075 1 802.11n(20MHz)(Chain1) 2412-2462 19.62 5.00 20 0.058 1 802.11 n(20MHz) 2412-2462 / / 20 0.133 1 (Chain0+Chain1) 802.11n(40MHz)(Chain0) 2422-2452 22.40 5.00 20 0.109 1 802.11n(40MHz)(Chain1) 2422-2452 21.20 5.00 20 0.082 1 802.11 n(40MHz) 2422-2452 / / 20 0.191 1 (Chain0+Chain1) NOTE: Total(Chain0+Chain1) , the formula of calculated the MPE is: CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1 CPD = Calculation power density LPD = Limit of power density Cerpass Technology Corp. Issued date : Jan 10,2012 Tel: 86-512-6917-5888 Fax: 86-512-6917-5666 Page No. : 3 of 3


Document Created: 2012-01-11 15:01:37
Document Modified: 2012-01-11 15:01:37
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