W3Z-D9000ASMT2.4GHz Transmitter Module

1 Transmitter Module (D-9000A-SMT) User Manual 2 INSTRUCTION TO THE USER This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a typical installation. This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna on the device experiencing the interference • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which this device is connected • Consult the dealer or experienced technician for the device experiencing the interference In order to maintain compliance with FCC regulations, no changes can be made to this equipment without the approval of Gatekeeper Systems, Inc. The user is cautioned that any changes or modifications made to the equipment without the approval of Gatekeeper Systems, Inc. could void the user’s authority to operate this equipment. Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IC / ISED statements: This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions: 1 . This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes : 1. L’appareil ne doit pas produire de brouillage; 2. L’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement. Declaration of Conformity (RED) Hereby, we declare that the radio equipment type model D-9000A-SMT is in compliance with Radio Equipment Directive (RED) 2014/53/EU. The relevant harmonized test standards are listed: ETSI EN 300 440 V2.1.1 (2017-03), EN 62368-1:2014, EN 62479: 2010 Draft ETSI EN 301 489-1 V2.2.0(2017-03), Draft ETSI EN 301 489-17 V3.2.0(2017-03) The suggested ambient temperature is around 0°C to 40°C 3 1. Transmitter Module: The Gatekeeper Systems D-9000A-SMT Transmitter Module contains a 2.4GHz transceivers used to send commands to the Gatekeeper Systems wheels and communicate with Gatekeeper Athena wheel and module. 2. Transmitter Module details: Table 1: Power Connector Connector Terminal Description 1 HEARTBEAT, MAX current, 50mA 2 GND 3 VCC IN 4 GND 5 RS232 TX 6 RS232 RX Internal F Antenna I/O Connector Power Connector External Antenna 4 Table 2: I/O Connector (Particle.IO) Connector Terminal Description 1 RESET 2 GND 3 3.3VDC IN 4 GND 5 UART TX 6 UART RX Installation Stick to the back side of the antenna or any plastic housing by tape 5 Contacting Gatekeeper Systems For more information about the Long Range Transmitter 2 and troubleshooting, to order parts or report an issue, contact the Gatekeeper Systems Inc. regional Customer Support office nearest to your location. Hong Kong Gatekeeper Systems (HK), Ltd. 36/F, Tower 2, Times Square 1 Matheson Street, Causeway Bay, Hong Kong USA Gatekeeper Systems, Inc. 90 Icon Foothill Ranch, CA 92610 USA (888) 808-9433 Canada Gatekeeper Systems Canada, Ltd. 272 Galaxy Boulevard Etobicoke, Ontario Canada M9W 5R8 (888) 525-3564

36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong 20 th April, 2020 Gatekeeper Systems (HK), Ltd. 36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong FCC ID: W3Z-D9000ASMT Gatekeeper Systems (HK), Ltd Sincerely, _________________________ Date: ____20 th April,2020_________ Steve Hannah

36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong Date :20 th April, 2020 Dear Sirs, Re. : Letter of Appointment This is the letter of authorization to accept our appointment of The Hong Kong Standards and Testing Centre Ltd. Mr. KC Lee as agent for GATEKEEPER SYSTEMS (HK), LTD with address 36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong to sign applications before the Commission on our behalf, to make representations to you on our behalf, and to receive and exchange data between our company and the Commission in connection with Certification of the following product of GATEKEEPER SYSTEMS (HK), LTD . Product name : 2.4GHz Transmitter Module Model : D-9000A-SMT This authorization will expire one year from the date of this letter. Yours sincerely, ____________________________ Steve Hannah Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230

FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 1 of 4 FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 2 of 4 FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 3 of 4 FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 4 of 4

FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 1 of 4 FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 2 of 4 FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 3 of 4 FCC ID: W3Z-D9000ASMT PHOTOGRAPH OF THE PRODUCT Page 4 of 4

nValley Tech Center • 470 Nepperhan Ave. • Yonkers, New York 10701 • Toll-Free (877) 380-9545 p.1 of 5 05.13.08 Gatekeeper Systems, Inc. 8 Studebaker Irvine, CA 92618 Introduction 360° Antenna has been retained to create a prototype 2.4 GHz ISM band patch antenna array with the following target specifications: Style: Patch Antenna Array Frequency Peak Response: 2.4 GHz ISM optimized for preferred spot frequency Polarization: Vertical Gain: ~13 dBi Horizontal Beam Width: ~25° / strive to keep sidelobes -15 dB <, possibly -20 dB Vertical Beam Width: ~120° / varies w/ placement & mounting, etc. Power: ~10 watts CW Impedance: 50-Ohms VSWR: < 1.5 Connectors: SMA, N, or coax pig tail 1 Construction: PC Board +/- Arlon 25N Dimensions: ~ 3 x 10" Deployment: Outdoors on pole The prototypes created and tested for this application are shown above. Measurements – VSWR The prototypes originally resonated at 2395 MHz. The effective dielectric constant (E r ) of this particular Arlon low loss material seems to be about 2% low of their advertised value. Thus, the top edge of each patch was trimmed to bring the antennas up to 2440 MHz. Trimming of the phasing lines was not practical; thus tuning tabs were used to improve the return loss/SWR of the antennas. Figure 1 on the following page shows the return loss curve of the prototype before trimming; Figure 2 shows the effect of trimming the prototype to center the frequency around 2440 MHz. nValley Tech Center • 470 Nepperhan Ave. • Yonkers, New York 10701 • Toll-Free (877) 380-9545 p.2 of 5 Figure 1: Return loss plot of prototype array before trimming to center at 2440 MHz. nValley Tech Center • 470 Nepperhan Ave. • Yonkers, New York 10701 • Toll-Free (877) 380-9545 p.3 of 5 Figure 2: Return loss plot after trimming to center the array around 2440 MHz. Measurements – Pattern The measured azimuthal pattern plot at 2440 MHz is shown on the following page in Figure 3. The peak gain was measured at about 12.8 dBi. Each -3 dB point was found to be at about ±15°, while the -10 dB point is at about ±24°; the pattern of the prototype antenna appeared to be very symmetrical; compare the measured pattern with the modeled pattern, shown as Figure 4. The -3 dB point on the elevation plot was measured at about +/- 60° degrees, very broad. An array optimized for gain typically has a -17 dB first sidelobe. This 4-patch array exhibits a -16 dB sidelobe at 75° degrees as seen in Figure 3’s accompanying table. Further reduction of this sidelobe would probably require a larger footprint for the antenna or a reduction in gain. dBi Gain 2440 MHz Azimuth 012.8 1011.9 15.39.8-3 dB Angle 203.6 23.82.8-10 dB Angle 30-5.6 40-8.8 50-11.3 60-14.7 70-11.9 75-3.7 80-8.3 90-23.9 100-25.0 110-25.0 120-25.0 130-25.0 140-25.0 150-25.0 160-25.0 170-25.0 180-25.0 190-25.0 200-25.0 210-25.0 220-25.0 230-25.0 240-25.0 250-25.0 260-25.0 270-21.4 280-10.6 285-4.1 290-12.4 300-13.5 310-12.0 320-9.1 330-5.1 336.12.8-10 dB Angle 3403.8 3469.8-3 dB Angle 35012.0 Notes: * Yellow shaded data cells denote that dBi reading was below the listed measurement. Angle° Patch Array Prototype 2440 MHz Azimuth Pattern -25 -20 -15 -10 -5 0 5 10 15 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 nValley Tech Center • 470 Nepperhan Ave. • Yonkers, New York 10701 • Toll-Free (877) 380-9545 p.5 of 5 Fig. 3: Measured azimuthal pattern at 2440 MHz. Fig. 4: Modeled azimuthal pattern; note the similarity, including the front sidelobe levels. The rear lobes should be greater than -30 dB; the measured rear lobe level on our prototypes was at least -30 dB. Printed Circuit Board Antenna Figure 5 shows a graphic of the Gerber file for the antenna array. Note that this design is based on Arlon 25N material, 0.100” thick. The revised size of the array PC board is 2.9” x 11”. As the antenna is not designed to be mounted by itself, we suggest that the board be mounted within an RF-transparent, weather-resistant plastic case with the feedline exiting the case directly away from the backplane. If the plastic in front of the antenna is fairly thin (1/16 inch or so), and the antenna PC board is mounted from 1/8 to 1/4 inch from the case face, the effect of the housing should be negligible; however, such a mounting system would have to be tested. Figure 5: Graphic of the Gerber file for the revised prototype antenna array. Other connector types can be accommodated, if desired.

Test Report Date : 2019-12-23 Page 1 of 72 No. : HM19110001 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. Applicant: Gatekeeper Systems (HK) Ltd. 36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong Manufacturer: Gatekeeper Systems (HK) Ltd. 36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong Description of Sample(s): Product: 2.4GHz Transmitter Module Brand Name: Gatekeeper Systems Model Number: D-9000A-SMT FCC ID: W3Z-D9000ASMT Date Sample(s) Received: 2019-11-01 Date Tested: 2019-11-27 to 2019-12-02 Investigation Requested: Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15: 2018 and ANSI C63.10:2013 for FCC Certification. Conclusion(s): The submitted product COMPLIED with the requirements of Federal Communications Commission [FCC] Rules and Regulations Part 15. The tests were performed in accordance with the standards described above and on Section 2.2 in this Test Report. Remark(s): --- _______________________________ CHEUNG Chi, Kenneth Authorized Signatory Test Report Date : 2019-12-23 Page 2 of 72 No. : HM19110001 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. CONTENT: Cover Page 1 of 72 Content Page 2 of 72 1.0 General Details 1.1 Equipment Under Test [EUT] Page 3 of 72 Description of EUT operation 1.2 Description of EUT Operation 1.3 Date of Order Page 3 of 72 1.4 Submitted Sample Page 3 of 72 1.5 Test Duration Page 3 of 72 1.6 Country of Origin Page 3 of 72 2.0 Technical Details 2.1 Investigations Requested Page 4 of 72 2.2 Test Standards and Results Summary Page 4 of 72 3.0 Test Results 3.1 Emission Page 5-66 of 72 Appendix A List of Measurement Equipment Page 67 of 72 Appendix B Photographs Page 68-72of 72 Test Report Date : 2019-12-23 Page 3 of 72 No. : HM19110001 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. 1.0 General Details 1.1 Equipment Under Test [EUT] Description of Sample(s) Product: 2.4GHz Transmitter Module Manufacturer: Gatekeeper Systems (HK) Ltd. 36/F, Tower 2, Times Square, 1 Matheson Street, Causeway Bay, Hong Kong Brand Name: Gatekeeper Systems Model Number: D-9000A-SMT Rating: 3.3VVd.c from DC power supply 1.2 Description of EUT Operation The Equipment Under Test (EUT) is 2.4GHz RF Transmitter Module of Gatekeeper Systems (HK) Ltd., which is 2.4GHz transceiver. The D-9000A-SMT support 2 transmissions modes which are modulated at 500kHz MSK (Minimum Shift Keying) and 1MHz FSK (Frequency Shift Keying). There are two antenna ports supported by the EUT, port 0 is prepared for external antenna, port 1 is embedded with an integral antenna. Port 0 of the EUT was connected to reference antenna provided by the manufacturer during test. The EUT was tested under test mode which was set in maximum output power and transmit continuously. 1.3 Date of Order 2019-11-01 1.4 Submitted Sample(s): 1 Sample 1.5 Test Duration 2019-11-27 to 2019-12-02 1.6 Country of Origin China Test Report Date : 2019-12-23 Page 4 of 72 No. : HM19110001 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. 2.0 Technical Details 2.1 Investigations Requested Perform Electromagnetic Interference measurements in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15: 2018 Regulations and ANSI C63.10:2013 for FCC Certification. 2.2 Test Standards and Results Summary Tables EMISSION Results Summary Test Condition Test Requirement Test Method Class / Test Result Severity Pass Fail Field Strength of Fundamental & Harmonics Emissions FCC 47CFR 15.249 ANSI C63.10:2013 N/A AC power-line conducted emissions FCC 47CFR 15.207 ANSI C63.10:2013 N/A N/A Radiated Emissions FCC 47CFR 15.209 ANSI C63.10:2013 N/A Antenna requirement FCC 47CFR 15.203 N/A N/A Note: N/A - Not Applicable Test Report Date : 2019-12-23 Page 5 of 72 No. : HM19110001 The Hong Kong Standards and Testing Centre Limited 10 Dai Wang Street, Taipo Industrial Estate, Tai Po, N.T., Hong Kong Tel: +852 2666 1888 Fax: +852 2664 4353 Email: [email protected] Website: www.stc.group This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Limited. For Conditions of Issuance of this test report, please refer to “Conditions of Issuance of Test Reports” section or Website. 3.0 Test Results 3.1 Emission 3.1.1 Field Strength of Fundamental & Harmonics Emissions Test Require…

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