BLD0776TXWireless Thermohygrometer

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

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

FCC ID: BLD0766TX Circuit Description The 433MHz crystal oscillator drives the base of Q1 the final/buffer amplifier. The modulation provided by IC (IM8706). The output of Q1 has the matching network consisting of L2 and C5 that limit the harmonic content and effect the proper coupling of the antenna to the output stage. Antenna, Ground and Power Source There is 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 3 Volt (“AAA” size battery x 2) primary battery

Date: 2002-07-20 TEST REPORT Page 1 of 24 No.: HM108276 FCC PART 15 SUBPART C CERTIFICATION REPORT FOR LOW POWER TRANSMITTER TEST REPORT No.:HM108276 Equipment Under Test [EUT]:Remote Sensor (TX) Model Number:0776TX Applicant:General Electric Company FCC ID :BLD0776TX Date: 2002-07-20 TEST REPORT Page 2 of 24 No.: HM108276 CONTENT: Cover Page 1 of 24 Content Page 2-3 of 24 Conclusion Page 4 of 24 1.0General Details 1.1Test Laboratory Page 5 of 24 1.2Applicant Details Page 5 of 24 Applicant HKSTC Code Number for Applicant Manufacturer 1.3Equipment Under Test [EUT] Page 6 of 24 Description of EUT operation 1.4Date of Order Page 6 of 24 1.5Submitted Sample Page 6 of 24 1.6Test Duration Page 6 of 24 1.7Country of Origin Page 6 of 24 1.8 Additional Information of EUT Page 7 of 24 2.0Technical Details 2.1Investigations Requested Page 8 of 24 2.2Test Standards and Results Summary Page 8 of 24 3.0Test Results 3.1Emission Page 9-15 of 24 3.2Bandwidth Measurement Page 16-17 of 24 Date: 2002-07-20 TEST REPORT Page 3 of 24 No.: HM108276 Appendix A List of Measurement Equipment Page 18 of 24 Appendix B Duty Cycle Correction During 100 msec Page 19-20 of 24 Appendix C Periodic Operation Page 21-22 of 24 Appendix D Photographs Page 23-24 of 24 Date: 2002-07-20 TEST REPORT Page 4 of 24 No.: HM108276 CONCLUSION 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. Verify byPatrick Wong for Chief Executive Date: 2002-07-20 TEST REPORT Page 5 of 24 No.: HM108276 1.0General Details 1.1Test 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 1.2Applicant Details Applicant GENERAL ELECTRIC COMPANY. 1975 Noble Road, Nela Park, Maildrop 3281, Cleveland, OH44112-6300, USA Telephone:(216) 266-2092 Fax:(216) 266-3602 HKSTC Code Number for ApplicantANE001 Manufacturer ANSEN ELECTRONICS COMPANY Chen Tung Industrial Zone, Ning Tau Administrative District, Qiao Tau Zhen, Dongguan, Guangdong, China Telephone:86 769 334 1405 Fax:86 769 334 1142 Date: 2002-07-20 TEST REPORT Page 6 of 24 No.: HM108276 1.3Equipment Under Test [EUT] Description of Sample Product:Remote Sensor (TX) Manufacturer:Ansen Electronics Company Brand Name:General Electric Model Number:0776 Input Voltage:3Vd.c (“AAA” size battery x 2) 1.3.1Description of EUT Operation The Equipment Under Test (EUT) is an General Electric Company., 433.97MHz remote sensor. The transmitter is an automatic transmitter. The EUT is to transmit RF signal while temperature measurement is changed. The EUT is for data transmission, Modulation by Data Code. Tape is pulses modulation. 1.4Date of Order 2002-07-09 1.5Submitted Sample(s): 3 Sample per model 1.6Test Duration 2002-07-19 1.7Country of Origin China Date: 2002-07-20 TEST REPORT Page 7 of 24 No.: HM108276 1.8Additional Information of EUT SubmittedNot Available User Manual Part List Circuit Diagram Printed Circuit Board [PCB] Layout Block diagram FCC ID Label Date: 2002-07-20 TEST REPORT Page 8 of 24 No.: HM108276 2.0Technical Details 2.1Investigations Requested Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.4:2000 for FCC Certification. 2.2Test Standards and Results Summary Tables EMISSION Results Summary Test ConditionTest RequirementTest MethodClass /Test Result SeverityPassFailedN/A Field Strength of Fundamental Emissions & Spurious Emissions FCC 47CFR 15.231eANSI C63.4:2000N/A Radiated Emissions, 30MHz to 1GHz FCC 47CFR 15.209ANSI C63.4:2000Class B Conducted Emissions on AC, 0.45MHz to 30MHz FCC 47CFR 15.207ANSI C63.4:2000Class B Note: N/A - Not Applicable Date: 2002-07-20 TEST REPORT Page 9 of 24 No.: HM108276 3.0Test Results 3.1Emission 3.1.1Radiated Emissions Test Requirement:FCC 47CFR 15.231e Test Method:ANSI C63.4:2000 Test Date:2002-07-19 Mode of Operation:On mode Test Method: The sample was placed 0.8m above the ground plane on the OATS *. Measurements in both horizontal and vertical polarities were performed. During the test, each emission was maximized by: having the EUT continuously working, investigate all operating modes, rotated about all 3 axis (X, Y & Z) to obtain worst position, manipulating interconnecting cables, rotating turntable, varying antenna height from 1m to 4m in both horizontal and vertical polarization. The emissions worst-case are shown in Test Results of the following pages. *:OATS [Open Area Test Site] located at HKSTC with a metal ground plane on filed with the FCC pursuant to section 2.948 of the FCC rules, with Registration Number: 90657. Test Setup: EUT distance = 3m Pre -Amplifier Receiver Turn Table Computer Ground plane Date: 2002-07-20 TEST REPORT Page 10 of 24 No.: HM108276 Limits for Field Strength of Fundamental Emissions [FCC 47CFR 15.231e]: Frequency Range of Fundamental Field Strength of Fundamental Emission [Peak] Field Strength of Fundamental Emission [Average] [MHz][μV/m][μV/m] 40.66-40.701,000100 70-13050050 130-174500 to 1,500 *50 to 150 * 174-2601,500150 260-4701,500 to 5,000 *150 to 500 * Above 4705,000500 ** Linear interpolations Where F is the frequency in MHz, the formula for calculating the maximum permitted fundamental field strengths are as follows: for the band 130-174 MHz, μV/m at meters=22.72727(F)-2454.545; for the band 260-470 MHz, μV/m at 3 meters =16.6667(F)-2833.3333. The maximum permissible unwanted emission level is 20dB below the maximum fundamental level. Date: 2002-07-20 TEST REPORT Page 11 of 24 No.: HM108276 Results: CorrectionLimit **Antenna Factor @3mPolarity dB μ V/m μ V/m 433.9752.420.673.04466.843,995.1Vertical Field Strength Measured dB μ V/m μ V/m Field Strength of Fundamental Emissions Peak Value Frequency Level @3m Fie…

Text truncated - open the document above for the full version.

1 Marianne Bosley From: Marianne Bosley Sent: Thursday, October 31, 2002 10:17 PM To: '[email protected]' Subject: General Electric Co Metrak #12976 FCC ID:BLD0776TX Hi Alice, The questions that surfaced from the technical review are below: RT Questions: 1. Does the EUT cease transmission, as required by Sections 15.231(a)(1) and (2), for both automatic activation AND manual activation, as described in the user’s manual during manual registration with the receiver? 2. 3 separate available channels are listed in the user’s manual, but only one was tested. What are the frequencies of the other 2 channels? Do they need to be tested? (see Section 15.31(m)). 3. While schematics for the receiver and base unit were submitted, schematics for the EUT (transmitter) were apparently not. Please submit them. 4. FYI- in the future, please use a lower RBW (e.g., 10kHz) to measure the 20 dB bandwidth. Please forward as soon as possible. Have a good day. Regards, Marianne

Close From: alice_wong [SMTP:[email protected]] To: [email protected] Cc: EED - Choy, Kitty Subject: General Electric Co Metrak #12976 FCC ID:BLD0776TX Sent: 11/6/2002 4:13 AM Importance: Normal Hi Marianne, 1) Periodic Operation 47CFR 15.231a A transmitter manually acurated must automatically deactivate within not more than 5 seconds of being released the transmitter is a one button transmitter for manual registration. The transmit period is 737.5 msec as shown in figure. 2) EUT have 3 channels switch. That function is send different registration code for three receiver (max) to our testing, we would choice worst cases (channel 1) record result on the test report. 3) Please see attached file for clearly circuit, if have any question please let me know. Thanks. Best Regards Alice ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Friday, November 01, 2002 11:17 AM Subject: General Electric Co Metrak #12976 FCC ID:BLD0776TX > Hi Alice, > > The questions that surfaced from the technical review are below: > > RT Questions: > > 1. Does the EUT cease transmission, as required by Sections 15.231(a)(1) > and (2), for both automatic activation AND manual activation, as described > in the user's manual during manual registration with the receiver? > > 2. 3 separate available channels are listed in the user's manual, but only > one was tested. What are the frequencies of the other 2 channels? Do they > need to be tested? (see Section 15.31(m)). > > 3. While schematics for the receiver and base unit were submitted, > schematics for the EUT (transmitter) were apparently not. Please submit Page 1 of 2General Electric Co Metrak #12976 FCC ID:BLD0776TX 11/7/2002https://www.metlabs.com/exchange/forms/IPM/NOTE/read.asp?command=open&obj=... > them. > > 4. FYI- in the future, please use a lower RBW (e.g., 10kHz) to measure the > 20 dB bandwidth. > > Please forward as soon as possible. > > Have a good day. > > Regards, > > Marianne > resubmit 0776 sch.zip period operation.PDF Page 2 of 2General Electric Co Metrak #12976 FCC ID:BLD0776TX 11/7/2002https://www.metlabs.com/exchange/forms/IPM/NOTE/read.asp?command=open&obj=...

TEST SET UP PHOTOGRAPH OF THE PRODUCT MEASUREMENT OF RADIATED EMISSION TEST SET UP