RF Exposure Report

FCC ID: 2AE7MRDW33D-E2

RF Exposure Info

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FCCID_2747746

Report On RF Exposure Estimation of the Vertex Telecom, Inc. DW33D Damai WiFi AC1750M Dual Band Gigabit Router COMMERCIAL-IN-CONFIDENCE FCC ID: 2AE7MRDW33D-E2 Document 57015092 Report 04 Issue 1 September 2015

COMMERCIAL-IN-CONFIDENCE REPORT ON RF Exposure Estimation of the The Vertex Telecom, Inc. DW33D Damai WiFi AC1750M Dual Band Gigabit Router Document 57015092 Report 04 Issue 1 September 2015 PREPARED FOR Vertex Telecom, Inc. 980 Corporate Center Dr, Pomona, CA 91768, USA PREPARED BY G Zhao Engineer APPROVED BY C Zhang Manager DATED 07 September 2015 ENGINEERING STATEMENT The measurements shown in this report were made in accordance with the procedures described on test pages. All reported testing was carried out on a sample equipment to demonstrate limited compliance with FCC CFR 47: Part 1 and 2. The sample tested was found to comply with the requirements defined in the applied rules. Test Engineer(s); G Zhao Document 57015092 Report 04 Issue 1 Page 1 of 4 COMMERCIAL-IN-CONFIDENCE

COMMERCIAL-IN-CONFIDENCE RF Exposure Measurement 1 Introduction This document was prepared to analyze the expected level of Radiofrequency Radiation Exposure caused by the radio transmission equipment DW33D Damai WiFi AC1750M Dual Band Gigabit Router belonging to The Vertex Telecom, Inc. 2 Limits and Guidelines on Maximum Permissible Exposure (MPE) Based on Section FCC Part 1.1307(b) requirements for environmental impact of human exposure to radio-frequency (RF) radiation, according to the KBD447498 Mobile and Portable Device RF Exposure Procedures and Equipment Authorization Policies, a device may be used in mobile exposure condition (GHz) mWas specified in the following table: Limits for Maximum Permissible Exposure Exposure Category Limit General Population 1.0mW/cm2or 10W/m2 NOTE 1: Occupational/controlled limits apply in situations in which persons are exposed as a consequence of their employment provided those persons are fully aware of the potential for exposure and can exercise control over their exposure. Limits for occupational/controlled exposure also apply in situations when an individual is transient through a location where occupational/controlled limits apply provided he or she is made aware of the potential for exposure. NOTE 2: General population/uncontrolled exposures apply in situations in which the general public may be exposed, or in which persons that are exposed as a consequence of their employment may not be fully aware of the potential for exposure or cannot exercise control over their exposure. 3 Calculation of Output Power threshold for DW33D Damai WiFi AC1750M Dual Band Gigabit Router Below method describes a theoretical approach to compare the output power of the DW33D Damai WiFi AC1750M Dual Band Gigabit Router based on a typical configuration mobile device. In accordance with 47CFR FCC Part 2.1091, the product was defined as a mobile device. 3.1 Typical Configuration of the DW33D Damai WiFi AC1750M Dual Band Gigabit Router The DW33D Damai WiFi AC1750M Dual Band Gigabit Router supports frequency band of 2400MHz to 2483.5MHz and 5725MHz to 5850MHz. It supports DSSS and OFDM modulation. Document 57015092 Report 04 Issue 1 Page 2 of 4

COMMERCIAL-IN-CONFIDENCE 3.2 Antennas and Technical Description of DW33D Damai WiFi AC1750M Dual Band Gigabit Router Frequency Band: 2400MHz to 2483.5MHz 20MHz Bandwidth Modulation Channel 1 Channel 6 Channel 11 Max. output power at Type (2412MHz) (2437MHz) (2462MHz) antenna connector(dBm) DSSS 23.71 23.61 24.14 OFDM 24.06 24.18 24.16 Transmitter frequency band 2400MHz to 2483.5MHz Number of antenna ports 1 Antenna gain 7.8dBi Note: The Directional Gain= 3dBi+10log (3) =7.8dBi was used as antenna gain. 40MHz Bandwidth Modulation Channel 1 Channel 6 Channel 11 Max. output power at Type (2412MHz) (2437MHz) (2462MHz) antenna connector(dBm) OFDM 22.98 22.66 22.82 Transmitter frequency band 2400MHz to 2483.5MHz Number of antenna ports 1 Antenna gain 7.8dBi Note: The Directional Gain= 3dBi+10log (3) =7.8dBi was used as antenna gain. Frequency Band: 5725MHz to 5850MHz 20MHz Bandwidth Modulation Channel 149 Channel 157 Channel 165 Max. output power at Type (5745MHz) (5785MHz) (5825MHz) antenna connector(dBm) OFDM 17.23 18.60 18.39 Transmitter frequency band 5725MHz to 5850MHz Number of antenna ports 1 Antenna gain 9.8dBi Note: The Directional Gain= 5dBi+10log (3) =9.8dBi was used as antenna gain. 40MHz Bandwidth Modulation Channel 151 Channel 159 Max. output power at Type (5755MHz) (5795MHz) antenna connector(dBm) OFDM 16.35 17.28 Transmitter frequency band 5725MHz to 5850MHz Number of antenna ports 1 Antenna gain 9.8dBi Note: The Directional Gain= 5dBi+10log (3) =9.8dBi was used as antenna gain. 80MHz Bandwidth Modulation Max. output power at Channel 155 (5775MHz) Type antenna connector(dBm) OFDM 13.05 Transmitter frequency band 5725MHz to 5850MHz Number of antenna ports 1 Antenna gain 9.8dBi Note: The Directional Gain= 5dBi+10log (3) =9.8dBi was used as antenna gain. Document 57015092 Report 04 Issue 1 Page 3 of 4

COMMERCIAL-IN-CONFIDENCE 3.3 Calculation result Frequency Band: 2400MHz to 2483.5MHz This WLAN device operate with 0cm, The maximum measured antenna conducted power, Pmax=24.18dBm The antenna gain, G=7.8dBi, So, the maximum EIRP power= P+G=31.98dBm, or 1577.61mW The limit for Maximum Permissible Exposure (MPE) for transmitter at 2.4GHz is1.0mW/cm2 The power density is related to EIRP with the equation: S = EIRP/4 D2, which equal to 1=1577.61mW /4 D2, thus D=11.2cm The minimum safe separation distance D= 11.2cm, which is below 20cm. Frequency Band: 5725MHz to 5850MHz This WLAN device operate with distance d 0cm, The maximum measured antenna conducted power, Pmax=18.60dBm The antenna gain, G=9.8dBi, So, the maximum EIRP power= P+G=28.40dBm, or 691.83mW The limit for Maximum Permissible Exposure (MPE) for transmitter at 2.4GHz is1.0mW/cm2 The power density is related to EIRP with the equation: S = EIRP/4 D2, which equal to 1=691.83mW /4 D2, thus D=7.42cm The minimum safe separation distance D= 7.42cm, which is below 20cm. Document 57015092 Report 04 Issue 1 Page 4 of 4


Document Created: 2019-10-10 01:59:17
Document Modified: 2019-10-10 01:59:17
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