VHM80016699167433mhz remote temperature sensor

PHOTOGRAPH OF THE PRODUCT FRONT VIEW OF THE PRODUCT PHOTOGRAPH OF THE PRODUCT REAR VIEW OF THE PRODUCT

PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT TOP VIEW PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT BOTTOM VIEW

FCC ID: VHM80016699167 Antenna, Ground and Power Source No external antenna. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 4.5 Volt (“AAA” size battery x 3) primary battery Antenna

FCC ID: VHM80016699167 Circuit Description The 433 MHz crystal oscillator drives the base of Q2 the final/buffer amplifier. The modulation provided by IC. The output of Q2 has the matching network consisting of L1, L2 and C1 that limit the harmonic content and effect the proper coupling of the antenna to the output stage. Antenna, Ground and Power Source No external antenna. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 4.5 Volt (“AAA” size battery x 3) primary battery Operation Descriptions The transmitter is a thermometer operating at 433MHz band. The transmitter is powered by a 4.5V battery (“AAA” size battery x 3) and the transmitting frequency is crystal controlled. The operation is achieved by different combinations of form pulse modulating signal on the 433 MHz carrier frequency. Remarks: The EUT continues to transmit while button is being pressed. It is button transmitter, Modulation by IC; and type is Pulse modulation.

STC Test Report Date : 2007-07-19 Page 1 of 19 No. : HM159282 The Hong Kong Standards and Testing Centre Ltd. 10 Dai Wang Street, Taipo Industrial Estate, N.T., Hong Kong Tel: (852) 2666 1888 Fax: (852) 2664 4353 Homepage: www.hkstc.org E-mail: [email protected] This report shall not be reproduced unless with prior written approval from the Hong Kong Standards and Testing Centre Ltd. For full text of “Conditions of Issuance of Test Report”, please refer to overleaf or refer to the website of Homepage. Applicant (BEE008): Bedford Electronics Ltd. Unit 1, 16/Fl., Wah Sing Industrial Bldg., 12-14 Wah Sing Street, Kwai Chung, N.T., Hong Kong Description of Samples: Model Name: 433mhz remote temperature sensor Brand Name: Waterloo Industries Inc. Model Number: 100342 FCC ID: VHM80016699167 Date Samples Received: 2007-06-25 Date Tested: 2007-06-29 to 2007-07-10 Investigation Requested: FCC Part 15 Subpart C Conclusions: The submitted product was deemed to have 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. Remarks: ---- LEE Kam Chuen, ElectroMagnetic Compatibility Department For and on behalf of The Hong Kong Standards and Testing Centre Ltd. STC Test Report Date : 2007-07-19 Page 2 of 19 No. : HM159282 The Hong Kong Standards and Testing Centre Ltd. 10 Dai Wang Street, Taipo Industrial Estate, N.T., Hong Kong Tel: (852) 2666 1888 Fax: (852) 2664 4353 Homepage: www.hkstc.org E-mail: [email protected] This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Ltd. For Conditions of Issuance of this test report, please refer to the overleaf or Homepage CONTENT: Cover Page 1 of 19 Content Page 2-3 of 19 1.0 General Details 1.1 Test Laboratory Page 4 of 19 1.2 Applicant Details Page 4 of 19 Applicant HKSTC Code Number for Applicant Manufacturer 1.3 Equipment Under Test [EUT] Page 5 of 19 Description of EUT operation 1.4 Date of Order Page 5 of 19 1.5 Submitted Samples Page 5 of 19 1.6 Test Duration Page 5 of 19 1.7 Country of Origin Page 5 of 19 2.0 Technical Details 2.1 Investigations Requested Page 6 of 19 2.2 Test Standards and Results Summary Page 6 of 19 3.0 Test Results 3.1 Emission Page 7-10 of 19 3.2 Bandwidth Measurement Page 11-12 of 19 STC Test Report Date : 2007-07-19 Page 3 of 19 No. : HM159282 The Hong Kong Standards and Testing Centre Ltd. 10 Dai Wang Street, Taipo Industrial Estate, N.T., Hong Kong Tel: (852) 2666 1888 Fax: (852) 2664 4353 Homepage: www.hkstc.org E-mail: [email protected] This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Ltd. For Conditions of Issuance of this test report, please refer to the overleaf or Homepage Appendix A List of Measurement Equipment Page 13 of 19 Appendix B Duty Cycle Correction During 100 msec Page 14-15 of 19 Appendix C Periodic Operation Page 16-17 of 19 Appendix D Photographs Page 18-19 of 19 STC Test Report Date : 2007-07-19 Page 4 of 19 No. : HM159282 The Hong Kong Standards and Testing Centre Ltd. 10 Dai Wang Street, Taipo Industrial Estate, N.T., Hong Kong Tel: (852) 2666 1888 Fax: (852) 2664 4353 Homepage: www.hkstc.org E-mail: [email protected] This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Ltd. For Conditions of Issuance of this test report, please refer to the overleaf or Homepage 1.0 General Details 1.1 Test Laboratory The Hong Kong Standards and Testing Centre Ltd. EMC Laboratory 10 Dai Wang Street, Taipo Industrial Estate New Territories, Hong Kong Telephone: 852 2666 1888 Fax: 852 2664 4353 1.2 Applicant Details Applicant Bedford Electronics Ltd. Unit 1, 16/Fl., Wah Sing Industrial Bldg., 12-14 Wah Sing Street, Kwai Chung, N.T., Hong Kong HKSTC Code Number for Applicant Manufacturer Bedford Electronics Ltd., China. Xiang Jiao Tang Chun, Xue Xiang, Buji, Long Gang, Shenzhen, Guang Dong, China. STC Test Report Date : 2007-07-19 Page 5 of 19 No. : HM159282 The Hong Kong Standards and Testing Centre Ltd. 10 Dai Wang Street, Taipo Industrial Estate, N.T., Hong Kong Tel: (852) 2666 1888 Fax: (852) 2664 4353 Homepage: www.hkstc.org E-mail: [email protected] This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Ltd. For Conditions of Issuance of this test report, please refer to the overleaf or Homepage 1.3 Equipment Under Test [EUT] Description of Sample Product: 433mhz remote temperature sensor Manufacturer: Bedford Electronics Ltd., China. Brand Name: Waterloo Industries Inc. Model Number: 100342 Rating: 4.5Vd.c (“AAA” size battery x 3) 1.3.1 Description of EUT Operation The Equipment Under Test (EUT) is a Bedford Electronics Ltd., 433m remote temperature sensor. The EUT continues to transmit while button is being pressing. It is button transmitter, Modulation by Data Code. Type is pulses modulation. 1.4 Date of Order 2007-06-25 1.5 Submitted Sample(s): 1 Sample 1.6 Test Duration 2007-06-29 to 2007-07-10 1.7 Country of Origin China STC Test Report Date : 2007-07-19 Page 6 of 19 No. : HM159282 The Hong Kong Standards and Testing Centre Ltd. 10 Dai Wang Street, Taipo Industrial Estate, N.T., Hong Kong Tel: (852) 2666 1888 Fax: (852) 2664 4353 Homepage: www.hkstc.org E-mail: [email protected] This report shall not be reproduced unless with prior written approval from The Hong Kong Standards and Testing Centre Ltd. For Conditions of Issuance of this test report, please refer to the overleaf or Homepage 2.0 Technical Details 2.1 Investigations Requested Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.4:2003 for FCC Certification. 2.2 Test Standards and Results Summary Tables EMISSION Results Summary Test Condition Test Requirement Test Meth…

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PHOTOGRAPH OF THE PRODUCT MEASUREMENT OF RADIATED EMISSION TEST SET UP