RF Exposure Report

FCC ID: YKBTT-030

RF Exposure Info

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FCCID_4013546

Page: 1 / 6 Report No.: T180522N07-MF Rev.: 00 IEEE C95.1 KDB 447498 D03 47 C.F.R. Part 1, Subpart I, Section 1.1310 47 C.F.R. Part 2, Subpart J, Section 2.1091 TEST REPORT RF EXPOSURE REPORT For DIRECT DRIVE TURNTABLE Model: TT Data Applies To: N/A Trade Name: CAMBRIDGE AUDIO Issued to Audio Partnership PLC Gallery Court, Hankey Place, London, SE1 4BB, United Kingdom Issued By Compliance Certification Services Inc. Tainan Laboratory No.8,Jiucengling, Xinhua Dist., Tainan City 712, Taiwan (R.O.C.) TEL: 886-6-580-2201 FAX: 886-6-580-2202 http://www.ccsrf.com E-Mail : service@ccsrf.com Issued Date: July 05, 2018 No.8, Jiucengling, Xinhua District, Tainan City 712, Taiwan / 71249 台南市新化區礁坑里九層嶺 8 號 t:(886-6) 5802-201 f:(886-6) 5802-202 www.sgs.tw www.ccsrf.com

Page: 2 / 6 Report No.: T180522N07-MF Ref. No.: Rev.: 00 Revision History Effect Rev. Issue Date Revisions Revised By Page 00 July 05, 2018 Initial Issue ALL Gina Lin Note: ※ Rev.00 Issue Date： July 19, 2017 T170712N02 Revised Class I Permissive Change Report and add the model name (N/A) & brand name (ION)

Page: 3 / 6 Report No.: T180522N07-MF Ref. No.: Rev.: 00 TABLE OF CONTENTS 1. LIMIT ...................................................................................................4 2. EUT SPECIFICATION ........................................................................4 3. TEST RESULTS .................................................................................5 4. MAXIMUM PERMISSIBLE EXPOSURE ............................................6

Page: 4 / 6 Report No.: T180522N07-MF Ref. No.: Rev.: 00 1. 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. 2. EUT SPECIFICATION EUT DIRECT DRIVE TURNTABLE Model TT RF Module CSR Model: BM875 802.11b/g/n HT20: 2.412GHz ~ 2.462GHz 802.11n HT40: 2.422GHz ~ 2.452GHz Frequency band 802.11a/n HT20: 5.180GHz ~ 5.240GHz / 5.745 ~ 5.825GHz (Operating) 802.11n HT40: 5.190GHz ~ 5.230GHz / 5.755~ 5.795GHz 802.11ac VHT80: 5.210GHz / 5.775GHz Others Portable (<20cm separation) Device category Mobile (>20cm separation) Others Occupational/Controlled exposure (S = 5mW/cm2) Exposure General Population/Uncontrolled exposure classification (S=1mW/cm2) Antenna Specification Dipole Antenna / Gain: 1.24 dBi (Numeric gain: 1.33) worst Maximum Average Bluetooth 3.0: 0.45 dBm (1.109 mW) output power Bluetooth 4.0: 3.94 dBm (2.479 mW) Bluetooth 3.0: 0.55 dBm (1.135 mW) Max tune up Power Bluetooth 4.0: 4.04 dBm (2.535 mW) MPE Evaluation* Evaluation applied SAR Evaluation N/A

Page: 5 / 6 Report No.: T180522N07-MF Ref. No.: Rev.: 00 3. TEST RESULTS No non-compliance noted. Calculation 30  P  G E2 Given E & S d 377 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 377 d 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 1 377  d / 100 2 d Where d = Distance in cm P = Power in mW G = Numeric antenna gain S = Power density in mW / cm2

Page: 6 / 6 Report No.: T180522N07-MF Ref. No.: Rev.: 00 4. MAXIMUM PERMISSIBLE EXPOSURE Substituting the MPE safe distance using d = 20 cm into Equation 1: S  0.000199  P  G Where P = Power in mW G = Numeric antenna gain S = Power density in mW / cm2 Bluetooth 3.0 mode: Ch. Frq.(MHz) P (mW) Gain (num.) D (cm) Power density in mW / cm2 Limit (mW/cm2) Result Mid 2441 1.135 1.33 20 0.0003 1 Pass Bluetooth 4.0 mode: Ch. Frq.(MHz) P (mW) Gain (num.) D (cm) Power density in mW / cm2 Limit (mW/cm2) Result High 2480 2.535 1.33 20 0.0007 1 Pass


Document Created: 2018-08-20 10:46:25
Document Modified: 2018-08-20 10:46:25
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