RF Exposure

FCC ID: LDK-BSTBT

RF Exposure Info

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FCCID_4104488

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RGMA181022004-00B §1.1307 (b) (1) & §2.1091 –MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to subpart 15.247 (i) and subpart 1.1307 (b)(1), 2.1091 systems operating under the provisions of this section shall be operated in a manner that ensures the public is not exposed to RF energy level in excess of the communication guidelines. Limits for General Population/Uncontrolled Exposure Limits for General Population/Uncontrolled Exposure Frequency Electric Field Magnetic Field Power Averaging Range Strength Strength Density Time (MHz) (V/m) (A/m) (mW/cm2) (Minutes) 0.3-1.34 614 1.63 *(100) 30 2 1.34-30 824/f 2.19/f *(180/f ) 30 30-300 27.5 0.073 0.2 30 300-1500 / / f/1500 30 1500-100,000 / / 1.0 30 f = frequency in MHz * = Plane-wave equivalent power density MPE Calculated: Predication of MPE limit at a given distance PG S= 4R 2 S = power density (in appropriate units, e.g. mW/cm2) P = power input to the antenna (in appropriate units, e.g., mW). G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain. R = distance to the center of radiation of the antenna (appropriate units, e.g., cm) For simultaneously transmit system, the calculated power density should comply with: FCC Part 15D Page 10 of 50

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RGMA181022004-00B Results Tune-Up Power Including Tolerance: Antenna Gain Max Tune-up Power Evaluation Power Frequency MPE Limit Distance Density (MHz) (dBi) (numeric) (dBm) (mW) (mW/cm2) (cm) (mW/cm2) 1921.536- 3.5 2.24 19.0 79.43 20 0.035 1.0 1928.448 2402-2480 2.6 1.82 5.5 3.55 20 0.0013 1.0 Note: To maintain compliance with the FCC’s RF exposure guidelines, place the equipment at least 20cm from nearby persons. The DECT and BT can transmit simultaneously at engineering mode , but Normal use can not be used at the same time, worst case result as below: =SDECT/Slimit- DECT + SBT/Slimit-BT =0.035/1+0.0013/1 =0.0363< 1.0 Result: Compliance FCC Part 15D Page 11 of 50


Document Created: 2018-12-12 11:51:33
Document Modified: 2018-12-12 11:51:33
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