Test Report

FCC ID: NMTTHX1X8R-01

Test Report

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A TUV Produktsicherheit und —qualitat Product Safety and Quaility TUV Rheinland Group Priifbericht — Nr.: 14011260 001 Seite 1 von 13 Test Report No. Page 1 of 13 Auftraggeber: IDT Technology Ltd. Applicant Block C, 9/F., Kaiser Estate, Phase 1 41 Man Yue Street Hunghom, Kowloon Hong Kong Gegenstand der Priifung: Low Power Transmitter Test item Bezeichnung: THR138, THR138R Serien—Nr.: Engineering sample Identification THN138, THN138R Serial No. Wareneingangs—Nr.: 051101041— Eingangsdatum: 01.11.2005 Receipt No. 051101042 Date of receipt Priifort: TUV Rheinland Hong Kong Ltd. Testing location Unit 8, 25"" Floor, Skyline Tower, 39 Wang Kwong Road, Kowloon Bay Kowloon, Hong Kong Hong Kong Productivity Council HKPC Building, 78 Tat Chee Avenue, Kowloon, Hong Kong Priifgrundlage: FCC Part 15, Subpart C Test specification Priifergebnis: Das vorstehend beschriebene Gerat wurde gepriift und entspricht oben Test Result genannter Priifgrundlage. The above mentioned product was tested and passed. gepriift / tested by: kontrolliert / reviewed by: 14.11.200§5 Hugo Wan @l + 1441.2006__ Thomas Bems %y{%flf Datum Name Unterschrift Datum Name Unterschrift Date Name Signature Date Name Signature Sonstiges: FCC ID NMTTHX1X8R—01 Other Aspects AbkGrzungen: OK, Pass, P = entspricht Prifgrundlage Abbreviations: OK, Pass, P = passed Fail, F = entspricht nicht Priifgrundlage Fail, F = failed N/A = nicht anwendbar N/A = not applicable NT = nicht getestet NT = not tested Dieser Priifbericht bezieht sich nur auf das 0.g. Priifmuster und darf ohne Genehmigung der Priifstelle nicht auszugsweise vervielfaitigt werden. Dieser Bericht berechtigt nicht zur Verwendung eines Priifzeichens. This test report relates to the a. m. test sample. Without permission of the test center this test report is not permitted to be duplicate in extracts. This test report does not entitle to carry any safety mark on this or similar roducts. TUV Aheiniand Hong Kong Ltd. : Unit 8, 25th Floor, Skyline Tower, 39 Wang Kwong Road, Kowloon Bay, Kowloon, Hong Kong: Phone: +882 2192 1000 + Fax: +852 2192 1008 > Mail: info@hk.chn.tuv.com + Web: www.tuv.com

www.tuv.com Test Summary Periodic Operation Device Result: Pass Radiated Emission of Carrier Frequency Result: Pass Spurious Radiated Emissions Result: Pass Bandwidth Measurement Result: Pass Test Report No.: 14011260 001 Date: 14.11.2005 Page 2 of 13

www.tuv.com Contents List of Test and Measurement Instruments.........................................................4 General Product Information ................................................................................5 Product Function and Intended Use.............................................................................................5 Circuit Description .........................................................................................................................5 Ratings and System Details ..........................................................................................................5 Independent Operation Modes......................................................................................................6 Submitted Documents ...................................................................................................................6 Related Submittal(s) Grants ..........................................................................................................6 Test Set-up and Operation Mode..........................................................................7 Principle of Configuration Selection ............................................................................................7 Test Operation and Test Software................................................................................................7 Special Accessories and Auxiliary Equipment ...........................................................................7 Countermeasures to achieve EMC Compliance..........................................................................7 Test Methodology ..................................................................................................8 Radiated Emission .........................................................................................................................8 Field Strength Calculation .............................................................................................................8 Test Results ...........................................................................................................9 Periodic Operation Device Section 15.231(a) ...........................................................................9 Radiated Emission of Carrier Frequency Section 15.231(b) .................................................10 Spurious Radiated Emissions Section 15.231(b)...................................................................11 Bandwidth Measurement Section 15.231(c) ...........................................................................13 Appendix 1: Test Results Appendix 2: Test Setup Appendix 3: EUT External Photo Appendix 4: EUT Internal Photo Appendix 5: FCCID Label, Block Diagram, Schematics and User manual. Test Report No.: 14011260 001 Date: 14.11.2005 Page 3 of 13

www.tuv.com List of Test and Measurement Instruments Kind of Equipment Manufacturer Type S/N Test Receiver Rohde & Schwarz ESVS30 842807/009 Biconical Antenna Rohde & Schwarz HK116 841489/015 Log.-Periodic Antenna Rohde & Schwarz HL223 841516/017 Double Ridge Horn Antenna EMCO 3115 9002-3351 Double Ridge Horn Antenna EMCO 3115 9002-3347 Signal Generator Rohde & Schwarz SMY 01 844146/024 Signal Generator Rohde & Schwarz SMY 01 844146/023 Spectrum Analyzer Rohde & Schwarz FSP30 1093.4495K30 Test Report No.: 14011260 001 Date: 14.11.2005 Page 4 of 13

www.tuv.com General Product Information Product Function and Intended Use The equipment under test (EUT) is a transmitter for a weather station operating at 433.92 MHz. The EUT senses the temperature and humidity level and then transmit this information to the associated weather station. A transmitter transmits signal for every 30.24 seconds, and the signal on period is about 0.143s. It activated automatically shall cease transmission within 5 seconds after activation. FCC ID: NMTTHX122NR-01 Models Product descriptions THR138, THR138R Water Resistant Remote Sensor with LCD Display THN138, THN138R Water Resistant Remote Sensor The models THN138, THN138R are identical in construction including PCB layout to the model THR138R, except the change in housing design and removed LCD display. For those models with suffix “R”, they are re-engineering models and are used for internal reference only. They are totally identical to the models without suffix “R”. For the above multiple models, due to the model THR138R is the most complex and integrated, the model THR138R was chosen as a representative model for testing. Circuit Description THR138R is a remote thermometer sensor and transmit data by using 433.92MHz. After every time of thermometer measurement, the data will be transfer to the receiver unit through 433.92MHz. It composes of a controller part and a transmitter part. The transmitter is basically a Colippttis oscillator, where C5, C6 and Y1 are used to determinate the resonant frequency that is 433.92MHz. Transistor Q3 whose fT is greater than 6GHz, provides a good frequency response to the circuit. There is a filtering circuitry, use L1, that is used to suppress harmonics of the oscillator. Capacitance C12, C13, C14 are employed to match the impedance of the antenna. Ratings and System Details Transmitter Operated Frequency : 433.92 MHz Number of channels : 1 Type of antenna : Integral antenna Power supply : Battery operated 3.0V Ports : none Protection Class : III Equipment Class : B Test Report No.: 14011260 001 Date: 14.11.2005 Page 5 of 13

www.tuv.com Independent Operation Modes The basic operation modes are: - Transmitting weather information. For further information refer to User Manual Submitted Documents The submitted documents are listed as follow: - Circuit diagram - Block diagram - User manual - FCC ID label Related Submittal(s) Grants This is a single application for certification of the transmitter. Test Report No.: 14011260 001 Date: 14.11.2005 Page 6 of 13

www.tuv.com Test Set-up and Operation Mode Principle of Configuration Selection Emission: The equipment under test (EUT) was configured to measure its highest possible radiation level. The test modes were adapted accordingly in reference to the instructions for use. Test Operation and Test Software Test operation should refer to test methodology. - There was no special software to exercise the device. Special Accessories and Auxiliary Equipment The product has been tested together with the following additional accessories: - none Countermeasures to achieve EMC Compliance The test sample, which has been tested, contained the noise suppression parts as described in the Circuit Diagram or the Technical Construction File. No additional measures were employed to achieve compliance. Test Report No.: 14011260 001 Date: 14.11.2005 Page 7 of 13

www.tuv.com Test Methodology Radiated Emission The radiated emission measurements were performed according to the procedures in ANSI C63.4-2003. The equipment under test (EUT) was placed at the middle of the 80 cm height turntable, and the turntable is 3 meters far from the measuring antenna. During the testing, the EUT was operated standalone and arranged for maximum emissions. The EUT was tested in three orthogonal planes. The investigation is performed with the EUT rotated 360ﾟ, the antenna height scanned between 1m and 4m, and the antenna rotated to repeat the measurements for both the horizontal and vertical antenna polarizations. Repeat the measurement steps until the maximum emissions were obtained. All radiated tests were performed at an antenna to EUT with 3 meters distance, unless stated otherwise in section 7.1.1 and 7.1.2 of this test report. Field Strength Calculation The field strength at 3 m was established by adding the meter reading of the spectrum analyzer to the factors associated with antenna correction factor, cable loss, preamplifiers and filter attenuation. The equation is expressed as follow: FS = R + AF + CF + FA – PA System Factor = CF + FA – PA. Where FS = Peak Value of Field Strength in dBuV/m at 3 meters. R = Peak Reading of Spectrum Analyzer in dBuV. AF = Antenna Factor in dB. CF = Cable Attenuation Factor in dB. FA = Filter Attenuation Factor in dB. PA = Preamplifier Factor in dB. FA and PA are only be used for the measuring frequency above 1 GHz. Average value of FS = FS –Average factor. Average Factor = 20 log duty cycle. Test Report No.: 14011260 001 Date: 14.11.2005 Page 8 of 13

www.tuv.com Test Results Periodic Operation Device Section 15.231(a) RESULT: Pass A transmitter transmits signal for every 30.24 seconds automatically, and every signal duration is about 0.143s. Hence it meets the requirement that the transmitter shall cease transmission within 5 seconds after activation. Test Report No.: 14011260 001 Date: 14.11.2005 Page 9 of 13

www.tuv.com Radiated Emission of Carrier Frequency Section 15.231(b) RESULT: Pass Test Specification : FCC Part 15 Section 15.231(b1 and b2) Test Method : ANSI 63.4-2003 Measurement Location : Semi Anechoic Chamber Measurement Distance : 3m Detector Function : Peak Measurement BW : 100 kHz Supply Voltage : DC 3.0V Polarization: Vertical Value Frequency System Measured Average Net Limit Delta Factor Field Factor Field to Limit strength strength at 3m at 3m (PK) (MHz) (dB) (dBuV/m) (dB) (dBuV/m) (dBuV/m) (dB) Peak 433.863 18.1 72.0 - 72.0 100.8 -28.8 Average 433.863 18.1 72.0 -3.3 68.7 80.8 -12.1 Polarization: Horizontal Value Frequency System Measured Average Net Limit Delta Factor Field Factor Field to Limit strength strength at 3m at 3m (PK) (MHz) (dB) (dBuV/m) (dB) (dBuV/m) (dBuV/m) (dB) Peak 433.863 18.1 65.4 - 65.4 100.8 -35.4 Average 433.863 18.1 65.4 -3.3 62.1 80.8 -18.7 Remark; The calculation of average factor is shown in appendix 1 page 3-5. Limit Section 15.231(b2) Frequency Peak Emission Average Emission within the band (microvolt/meter) dBµV/m (microvolt/meter) dBµV/m (MHz) 433.86 109,954 100.8 10,995 80.8 According to section 15.35(b), when average radiated emission measurements are specified, including emission measurement below 1000MHz, there also is limit on the radio frequency emissions, as measured using instrumentation with a peak detector function, corresponding to 20dB above the maximum permitted average limit for the frequency being investigated. Test Report No.: 14011260 001 Date: 14.11.2005 Page 10 of 13

www.tuv.com Spurious Radiated Emissions Section 15.231(b) RESULT: Pass Test Specification : FCC Part 15 Section 15.231(b1 and b3) Test Method : ANSI 63.4-2003 Measurement Location : Semi Anechoic Chamber Measurement Distance : 3m Detector Function : Peak Measurement BW : 100 kHz Supply Voltage : DC 3.0V Measuring Frequency Range : 30-5000MHz Polarization: Vertical Frequency Reading Antenna System Field Average Field Limit Delta Factor Factor strength Factor strength at 3m to at 3m at 3m Limit (PK) (PK) (AV) (MHz) (dBuV/m) (dBuV/m) (dB) (dBuV/m) (dB) (dBuV/m) (dBuV/m) (dB) 867.726 13.33 22.20 2.67 38.20 -3.28 34.92 60.80 -25.88 *1301.589 40.98 24.90 -33.70 32.18 -3.28 28.90 54.00 -25.10 1735.532 38.08 26.50 -33.30 31.28 -3.28 28.00 60.80 -32.80 2169.515 37.82 27.80 -32.56 33.06 -3.28 29.78 60.80 -31.02 2601.578 36.73 28.88 -31.18 34.43 -3.28 31.15 60.80 -29.65 3304.924 43.20 30.00 -29.73 43.47 -3.28 40.19 60.80 -20.61 3471.064 45.11 31.20 -31.09 45.22 -3.28 41.94 60.80 -18.86 *3904.707 43.27 32.50 -30.35 45.42 -3.28 42.14 54.00 -11.86 4338.810 42.58 32.45 -29.91 45.12 -3.28 41.84 60.80 -18.96 Test Report No.: 14011260 001 Date: 14.11.2005 Page 11 of 13

www.tuv.com Polarization: Horizontal Frequency Reading Antenna System Field Average Field Limit Delta Factor Factor strength Factor strength at 3m to at 3m at 3m Limit (PK) (PK) (AV) (MHz) (dBuV/m) (dBuV/m) (dB) (dBuV/m) (dB) (dBuV/m) (dBuV/m) (dB) 867.726 9.63 22.20 2.67 34.50 -3.28 31.22 60.80 -29.58 *1301.589 40.88 24.90 -33.70 32.08 -3.28 28.80 54.00 -25.20 1735.232 39.11 26.50 -33.30 32.31 -3.28 29.03 60.80 -31.77 2169.175 38.09 27.80 -32.56 33.33 -3.28 30.05 60.80 -30.75 2603.439 37.37 28.88 -31.18 35.07 -3.28 31.79 60.80 -29.01 3037.241 44.35 30.00 -29.73 44.62 -3.28 41.34 60.80 -19.46 3470.984 50.13 31.20 -31.09 50.24 -3.28 46.96 60.80 -13.84 *3904.787 45.06 32.50 -30.35 47.21 -3.28 43.93 54.00 -10.07 4338.750 44.90 32.45 -29.91 47.44 -3.28 44.16 60.80 -16.64 Remark: ‘ * ‘ indicates the frequency of the emissions fall into the restricted band. There is no spurious emission found between lowest oscillating frequency to 30 MHz. Limit Section 15.231(b3) Frequency (MHz) Field strength Field strength Measurement distance (microvolt/meter) (dBµV/m) (meters) 433.86 1,099 20*log(1099) = 60.8 3 Section 15.209 Radiated emissions, which fall in the restricted bands, as defined in Section 15.205(a), was also comply with the radiated emission limits specified in Section 15.209. Limit for Radiated Emission under Section 15.209: Frequency (MHz) Field strength Field strength Measurement distance (microvolt/meter) (dBµV/m) (meters) 30-88 100 20*log(100) = 40.0 3 88-216 150 20*log(150) = 43.5 3 216-960 200 20*log(200) = 46.0 3 960-2500 500 20*log(500) = 54.0 3 The emission limits shown in the above table are based on measurements employing a CISPR quasi-peak detector and above 1000 MHz are based on the measurements employing an average detector. Test Report No.: 14011260 001 Date: 14.11.2005 Page 12 of 13

www.tuv.com Bandwidth Measurement Section 15.231(c) RESULT: Pass Test Specification : FCC Part 15 section 15.231(c) Port of Testing : Coupling Detector Function : Peak Supply Voltage : DC 3.0V Refer to the data graph, the 20dB points at lower edge and at higher edge are 9.2KHz and 7.4KHz respectively apart from the centre modulated carrier, the bandwidth of the emission is 0.004 % of the centre frequency. Therefore, the EUT meets the requirement of section 15.231(c). For test results refer to Appendix 1, page 2. Limit Section 15.231(c) The bandwidth of the emission shall be no wider than 0.25% if the center frequency for devices operating above 70MHz and below 900MHz. Test Report No.: 14011260 001 Date: 14.11.2005 Page 13 of 13


Document Created: 2005-11-28 13:36:55
Document Modified: 2005-11-28 13:36:55
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