RF exposure letter

FCC ID: SLV-MYDOOR

RF Exposure Info

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FCCID_4317724

FCC ID: SLV-MYDOOR FCC 47 CFR MPE REPORT Intrasonic Technology, Inc. RETRO-MyDoor Model Number: MyDoor-B Additional Model: MyDoor-RB, MyDoor-SB, MyDoor-WB, R-MyDoor-B, R-MyDoor-RB, R-MyDoor-SB, R-MyDoor-WB FCC ID: SLV-MYDOOR Prepared for: Intrasonic Technology, Inc. 9525 FOREST VIEW STREET, DALLAS, TEXAS 75243, USA Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R1905030 Date of Test: Apr. 09~May 07, 2019 Date of Report: May 10, 2019 EST Technology Co. ,Ltd Report No. ESTE-R1905030 Page 1 of 3

FCC ID: SLV-MYDOOR Maximum Permissible Exposure 1、Applicable Standard 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 level in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2m normally can be maintained between the user and the device. (a)、Limits for Occupational / Controlled Exposure Frequency Electric Field Magnetic Power Averaging Range (MHz) Strength E) Field Strength Density (S) Times︱E︱ (V/m) (H) (A/m) (mW/cm2) 2 , ︱H︱2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-10000 5 6 (b)、Limits for General Population / Uncontrolled Exposure Frequency Electric Field Magnetic Power Averaging Range (MHz) Strength E) Field Strength Density (S) Times︱E︱ (V/m) (H) (A/m) (mW/cm2) 2 , ︱H︱2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 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 1500-10000 1.o 30 Note: f=frequency in MHz; *Plane-wave equivalent power density 2、MPE Calculation Method E (V/m) = (30*P*G) 0.5/d Power Density: Pd (W/m2) = E2/377 E = Electric Field (V/m) P = Peak RF output Power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between radiator and human body (m) The formula can be changed to Pd = (30*P*G) / (377*d2) From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained EST Technology Co. ,Ltd Report No. ESTE-R1905030 Page 2 of 3

FCC ID: SLV-MYDOOR 3、Conducted Power Result Target Antenna gain Frequency AV output power AV output power Mode power (MHz) (dBm) (mW) (dBi) (Linear) （dBm） 2412 19.78 95.060 19±1 2.5 1.778 IEEE 2437 19.63 91.833 19±1 2.5 1.778 802.11b 2462 19.37 86.497 19±1 2.5 1.778 2412 19.10 81.283 19±1 2.5 1.778 IEEE 2437 19.10 81.283 19±1 2.5 1.778 802.11g 2462 19.00 79.433 19±1 2.5 1.778 IEEE 2412 20.09 102.094 20±1 2.5 1.778 802.11n 2437 19.82 95.940 19±1 2.5 1.778 HT20 2462 19.34 85.901 19±1 2.5 1.778 IEEE 2422 19.51 89.331 19±1 2.5 1.778 802.11n 2437 19.36 86.298 19±1 2.5 1.778 HT40 2452 19.28 84.723 19±1 2.5 1.778 4、Calculated Result and Limit Antenna gain Limited Power of Target Density Power Test Mode power (S) Density (dBi) (Linear) Result （dBm） (mW (S) /cm2) (mW /cm2) 2.4G Band IEEE 802.11b 20 2.5 1.778 0.03538 1 Compiles IEEE 802.11g 20 2.5 1.778 0.03538 1 Compiles IEEE 802.11n HT20 21 2.5 1.778 0.04454 1 Compiles IEEE 802.11n HT40 20 2.5 1.778 0.03538 1 Compiles EST Technology Co. ,Ltd Report No. ESTE-R1905030 Page 3 of 3


Document Created: 2019-06-14 05:12:47
Document Modified: 2019-06-14 05:12:47
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