NTMEJ8LT-WT480TTransmitter of Wireless Microphone

Test Report ------------------------------------------------------------------------------ 1/2 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 FCC ID : NTMEJ8LT-WT480T Explain of Q2 of Correspondence Reference Number 20823 1. Unmodulation Tone Frequency 38 KHz Tone Frequency 38 KHz Firstly, the page 31 of report is actually for 15 KHz. Because, the EUT is including tone frequency 38kHz when unmodulation then input 15 kHz signal by signal generator.. Finally, The EUT produced harmonics of 15 kHz (For example 15 kHz, 30 kHz, 45kHz and so on) and harmonics of tone frequency 38 kHz (For example 38 kHz, 76 kHz, 114kHz and so on). See next page. Above status produced wrong messaged to sidebands spaced at 10 kHz If you not accept this explanation. I can do 10kHz modulation provable next page corrected. P.S. Regarding this status , Mr. George Tannahill had good experience. Test Report ------------------------------------------------------------------------------ 2/2 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 15KHz modulation The sidebands spaced is including the 15kHz and all harmonic frequency with 38 kHz tone frequency

LABEL Format: This device complies with Part 74 of the FCC Rules FCC ID:NTMEJ8LT-WT480T LABEL Size: 43 X 24 mm LABEL Position of microphone transmitter: LABEL Size: 45 X 35 mm LABEL Position of charger:

12345678 A B C D 87654321 D C B A Title NumberRevisionSize A2 Date:7-Aug-2001 Sheet of File:F:\layout\..\480t-745.s01Drawn By: L8 22uH R45 470 1234 CN3 TONE R44 68K C62 10uF R43 220 R42 220 R41 20 R40 220 R29 27K L1 39nH L2 39nH C61 104P L7 5T Q9 2SA1037R R39 2K2 R38 22K R37 47K Q10 2SC2411K MOD 3VB 3VA LK CV C53 2P L4 6n8H C56 101P C54 2P C52 102P R34 100 L3 10nH R33 22K Q7 BFR505 C41 10uF C42 102P R30 150K Q5 2SC2411K C50 104P R19 100K R7 10K C16 301P SW R15 4K7 C27 2u2F C26 2u2F C24 301P R12 2K2 C14 10uF R11 10K R10 10K C13 101P 5 6 7 U1B BA15218F R9 10K C12 222P C11 103P R8 22K C6 101P 3 2 1 8 4 U1A BA15218F C17 2u2F C18 2u2F R13 4K7 GCin 3 RectIn 2 THDtr 8 VCC 13 -IN 5 GND 4 ReCap 1 OUT 7 U2A NE571D GCin 14 RectIn 15 THDtr 9 -IN 12 RES 11 ReCap 16 OUT 10 U2B SA571D R16 100K Q3 2SC2412K R6 1K C29 1uF R17 10K C30 1uF C33 103P Q1 2SA1797 R21 100K R22 220 C35 103P Q2 2SC2412K R23 33K C36 10uF C8 102P C23 102P C32 102P C9 151P C22 1uF C7 1uF C5 1uF C25 1uF C19 1uF VR2 50K C15 2u2F D2 RLS4148 D3 RLS4148 C34 2u2F C37 103P R20 18K +3V 3 GND 1 VIN 2 Q6 3002PR C10 2u2F C31 102P R18 30K C28 1uF 12345 CN2 DC/DC C2 1uF R2 1K C4 101P 1 2 CN1 DC 3VIN ANT R4 10K C1 4u7FR3 10K C3 1uF MIC IN VR1 B10K C21 1uF OUT 1 VSS 2 VDD 3 Q4 XC61AN6002 R14 1K C20 22uF LED RED R31 47 VP 3 FIN 8 XFIN 7 LE 11 DATA 10 CLOCK 9 GND 6 DO 5 OSCOUT 2 VCC 4 OSCIN 1 12 U3 MB15E03L C44 102P C47 1uF C48 4u7F C49 103P R32 47 XL 4MHz C45 27P C46 39P VC1 20P R28 1K8 VCC 1 7 6 2 3 5 GND 8 4 U4 PIC12C508 4 2 1 C 8 CS CH.SW R27 1K C40 4u7F R26 0 R25 0 C38 101P C51 101P C55 102P R35 10 L5 10nH R36 22K Q8 BFR520 C57 3P L6 6n8H C59 2P C58 4P C60 4P C43 47P R24 2K C39 473P R5 1K R1 330K 862-T (Option for EJ-8LT) UHF-PLL Switchable Wireless Mic. System VCO 3V RFAMP PLL LPF 6.5V 865-P WT-480T/EJ-8LT L K MIC E-J ELECTRONICS. C.L.Shen (480T-VCO) 1234 A B C D 4321 D C B A Title NumberRevisionSize A4 Date:7-Aug-2001 Sheet of File:F:\layout\RD01\SCH\MWM862\862-p.s01Drawn By: 12345 DC/DC D1 RB160L-40 C1 10uf/16V C2 47uf LX 3 VSS 1 VOUT 2 U1 XC6383A651 L1 100uH 862-P (DC/DC) 6.5V OUT3V IN WT-480T / EJ-8LT C.L.Shen E-J ELECTRONICS. 1234 A B C D 4321 D C B A Title NumberRevisionSize A4 Date:7-Aug-2001 Sheet of File:F:\layout\RD01\SCH\MWM862\862-t.s01Drawn By: 1234 CN1 TONE L1 2u2H C4 102P R5 10K R6 680K Q2 C2412 Q1 C2412 R4 4K7 R7 390K C3 102P C5 102P R8 1K R1 47KC2 102P R3 10K R2 33K C1 151P XL 32.768KhzR9 100K 862-T (TONE KEY) 6.5V WT-480T / EJ-8LT C.L.Shen 1234 A B C D 4321 D C B A Title NumberRevisionSize A4 Date:8-Aug-2001 Sheet of File:F:\layout\RD01\SCH\WR201\Hdc201.s01Drawn By: R24 (0) FUSE 750mA DCJACK DC12V D1 IN4002 1 2 CN1 PO SW R1 22K R2 47K Q1 A1015 R21 5K6 1 2 3 CN2 HDC C4 561 C3 2200/25V D2 IN4148 L1 160uH R5 470 R7 0.5/0.5W Vin 1 GND 2 Vout 3 U1 78L05 R14 56K C6 104 Q2 B772 Q3 C1815 D3 IN5819 D4 IN4002 C5 100uf C2 47uf C1 47uf R13 12K R9 47K R15 5K6 R10 390 R6 1K R12 3K9 1 2 CN3 DC/OUT R8 5K6 R4 1K L2 22uH L3 22uH R11 5K6 1 2 3 4 5 6 7 8 11 13 12 14 15 16 10 9 U2 HDC9101 1 2 CN4 DC/OUT R22 3K9 R17 1K R20 390 R19 47K R23 12K C8 100uf D7 IN4002 D6 IN5819 Q5 C1815 Q4 B772 C9 104 R18 0.5/0.5W R16 470 L4 160uH D5 IN4148 C7 561 LED5 CHG/A LED4 FULL/A LED3 CHG/B LED2 FULL/B R3 1K LED1 POWER BAT-A BAT+A HDC-202 BAT+B BAT-B C.L.Shen Charging Stand E-J ELECTRONICES.

Test Report ------------------------------------------------------------------------------ 2/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Contents Chapter 0Application for Certification...................................................... 4 Chapter 1General 1.1 Introduction.................................................................................................................. 5 1.2 Description of Support Equipment............................................................................... 5 1.3 Configuration of System Under Test............................................................................ 6 1.4 Location of the Measurement Site................................................................................ 7 1.5 General Test Condition................................................................................................. 7 1.6 Conducted Emission Test............................................................................................. 8 1.7 Conducted Emission Test Result................................................................................. 10 1.8 Radiated Emission Test............................................................................................... 11 1.9 Radiated Emission Test Result.................................................................................... 13 Chapter 2Power Output Measurement 2.1 Rules and Specification Limits.................................................................................... 15 2.2 Measurement Condition and Setup............................................................................. 15 2.3 List of Measurement Instrument................................................................................. 16 2.4 Measurement Configuration........................................................................................ 17 2.5 Measurement Result.................................................................................................... 18 Chapter 3Modulation Characteristics Measurement 3.1 Rules and Specification Limits.................................................................................... 21 3.2 Test Configuration & List of Test Instruments........................................................... 21 3.3 Frequency Response of Audio Low Pass Filter Measurement Condition & Setup.... 22 3.4 Modulation Limiting Measurement Condition & Setup............................................. 24 Chapter 4Occupied Bandwidth Measurement & Calculation 4.1 Rules and Specification Limits.................................................................................... 27 4.2 Test Condition & Test Instruments............................................................................. 27 4.3 Measurement Procedure.............................................................................................. 28 4.4 Measurement Result.................................................................................................... 28 Test Report ------------------------------------------------------------------------------ 3/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Chapter 5Field Strength of Spurious Radiation Measurement 5.1 Rules and Specification Limits.................................................................................... 32 5.2 Measurement Condition & Setup................................................................................ 32 5.3 List of Measurement Instruments................................................................................ 34 5.4 Measurement Configuration........................................................................................ 35 5.5 Measurement Result.................................................................................................... 37 Chapter 6Frequency Stability Tolerance Measurement 6.1 Rules and Specification limits..................................................................................... 43 6.2 Measurement Condition & Setup with Temperature Variation.................................. 43 6.3 List of Measurement Instruments with Temperature Variation.................................. 43 6.4 Measurement Configuration with Temperature Variation.......................................... 44 6.5 Measurement Result with Temperature Variation...................................................... 45 6.6 Measurement Condition & Setup with Voltage Variation.......................................... 47 6.7 List of Measurement Instruments with Voltage Variation.......................................... 47 6.8 Measurement Configuration with Voltage Variation.................................................. 47 6.9 Measurement Result with Voltage Variation.............................................................. 48 Test Report ------------------------------------------------------------------------------ 4/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Chapter 0 Application for Certification 74.861 ( e )( 2 ) : Transmitters may be either crystal controlled or frequency synthesized. crystal controlled frequency synthesized 2.1033 ( c )( 1 ):E-J Electronics Co., Ltd. ; 4F , No.11 , Lane 125 , Sec 1 , Kuo Kwang Road Ta Li City , Taichung Hsien Taiwan Taiwan R .O .C – applicant and manufacturer 2.1033 ( c )( 2 ):The equipment is a transmitter, wireless microphone Model No.: EJ-8LT, WT-480T 2.1033 ( c )( 3 ):Quantity production is planned. See Exhibit C 2.1033 ( c )( 4 ):Type of emission – F3E- FM Modulation 2.1033 ( c )( 5 ):100Hz ~ 15KHz 2.1033 ( c )( 6 ):2.000 mW 2.1033 ( c )( 7 ):Specification of 250 mW is met by the equipment in the applicable Part 74.861 (e)(1)(ii) 2.1033 ( c )( 8 ):Final RF amplifier stage current : 10 mA 2.1033 ( c )( 9 ):Description follows 2.1033 ( c )( 10 ):Complete circuit diagrams are included. No modification …

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Test Report ------------------------------------------------------------------------------ 25/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Test Report ------------------------------------------------------------------------------ 26/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440

Test Report ------------------------------------------------------------------------------ 46/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Temperatuer Variation Vs. Frequency Chart -30-25-20-15-10-505101520253035404550 Frequency (MHz) Test Report ------------------------------------------------------------------------------ 47/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 6.6 Measurement Condition & Setup with Voltage Variation 1. Attached the power line of the power supply to the battery position of the EUT. 2. Tuned the output power level to battery end point, 85 %, 100%, 115% of the normal operation power of EUT. 3. Recorded the frequency with a frequency counter. 6.7 List of Test Instrument : Instrument Name Model No. Brand Remark Spectrum Analyzer 8591AH P 1.8GHz Temperature ChamberTHS-MV2King Son Near field Probe7405-901 EMCO Power SupplyGPR-6030Good Will Auto Transformer Powerstat Supprior Elec. Co. 6.8 Configuration of Voltage Variation Test : EUT Wooden Table 110Vac Spectrum Power Supply (DC) Auto Transformer (AC) Test Report ------------------------------------------------------------------------------ 48/48 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 6.9 Measurement Result with Voltage Variation Frequency Stability of Voltage Variation Measurement Table Supply Voltage ( Volt ) Frequency ( MHz ) Tolerance ( MHz ) 2.55( 85% )744.200609744.166789 ~ 744.241210 3( 100% )744.200569744.166789 ~ 744.241210 3.45( 115% )744.200596744.166789 ~ 744.241210 Endpoint-Voltage: 1.50V Voltage Variation Vs. Frequency Chart 744.150000 744.155000 744.160000 744.165000 744.170000 744.175000 744.180000 744.185000 744.190000 744.195000 744.200000 744.205000 744.210000 744.215000 744.220000 744.225000 744.230000 744.235000 744.240000 744.245000 744.250000 Voltate Frequency(MHz)

Test Report ------------------------------------------------------------------------------ 1/6 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Power Output Measurement ARules and Specification Limits 2.1046(a), ANSI/ TIA/ EIA-603-1992, Paragraph 2.2.1. 74.861 ( e )( 1 ) : The power of the measured unmodulated carrier power at output of the transmitter power amplifier ( antenna input power ) may not exceed the following: 1. 54 – 72, 76 – 88 and 174 – 216 MHz band 50 mW. 2. 470 – 608 and 614 – 806 MHz band 250 mW. BTest condition and setup 1. Measurement was made on anechoic chamber. The EUT system was placed on non- conductive turntable which is 0.8 meters height, top surface 1.0 X 1.5 meter. The EUT was placed in three direction of the space in order to obtain maximum emission. 2. Connect the equipment as illustrated. Place the transmitter to be tested on the turntable in the standard test site. 3. Raise and lower the test antenna from 1m to 4m with the transmitter facing the antenna and record the highest received signal. 4. Repeat step (3) for seven additional readings at 45 interval positions of the turn-table. TRANSMITTER UNDER TEST Transmitter antenna Test antenna SPECTRUM ANALYZER Standard Test Site Test Report ------------------------------------------------------------------------------ 2/6 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 5. Replace the transmitter under test with a half-wave vertically polarized antenna. The center of the antenna should be at the same location as the transmitter under test. Connect the antenna to a signal generator with a known output and record the value. 6. FI a (dBm) = FI r (dBm) – Corrected (dB) Corrected (dB) = AF(dB) + [CL(dB) – Amplitude Gain] FI a : Actual Field Intensity FI r : Reading of the Field Intensity AF : Antenna Factor CL : Cable Loss RF SIGNAL GENERATOR Half-wave vertical antenna Test antenna SPECTRUM ANALYZER Standard Test Site Test Report ------------------------------------------------------------------------------ 3/6 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 7. The field intensity in Watt can then be determined by the following equation: P (watt ) = FI 2 ( Volt ) X d 2 (meter) / 49.2 P : Power in Watt D : Measurement Distance ( 3 m ) C. List of test Instrument Calibration Date Instrument Name Model No. Brand Serial No. Last time Next time EMI Receiver 8546AH P 3520A0024206/29/0106/29/02 RF Filter Section 85460AH P 3448A0021706/29/0106/29/02 Bi-log AntennaCBL6141ASchaffner 4206 03/09/0103/09/02 Switch/Control Unit3488AHPN/A11/20/0011/20/01 (> 30MHz) Auto Switch BoxASB-01TRC9904-0111/20/0011/20/01 (> 30MHz) Spectrum Analyzer8564EHPUS3643300208/01/0108/01/02 Microwave Preamplifier83051AHP3232A0034708/01/0108/01/02 Horn Antenna 3115 EMCO9704 – 517808/01/0108/01/02 Anechoic Chamber (cable calibrated together) 05/20/0105/20/02 The level of confidence of 95%, the uncertainty of measurement of radiated emission is ± 4.96 dB. Test Report ------------------------------------------------------------------------------ 4/6 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 D. Measurement Result (1)Frequency: 700.704 MHz The maximum field measured is 3.015 dBm FI ( Volt ) = 10 100.392/20 X 10 -6 = 0.104616 V FI ( mW ) = (0.104616 X 3 ) 2 / 49.2 = 2.002 mW Angle of Turn Table ( °) Spectrum Reading (dBm) Corrected (dB) Actually Value (dBm) E. R. P. (mW) Average (mW) 0° 0.709 45° 2.660 90° 0.564 135° 1.479 180° 1.807 225° 0.444 270° 0.362 315° 0.025 1.0063 Test Report ------------------------------------------------------------------------------ 5/6 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 (2)Frequency: 744.204 MHz The maximum field measured is 2.70dBm FI ( Volt ) = 10 100.077/20 X 10 -6 = 0.100890 V FI ( mW ) = (0.100890 X 3 ) 2 / 49.2 = 1.8619 mW Angle of Turn Table ( °) Spectrum Reading (dBm) Corrected (dB) Actually Value (dBm) E. R. P. (mW) Average (mW) 0° 0.672 45° 1.210 90° 0.411 135° 0.309 180° 0.690 225° 0.864 270° 0.033 315° 0.460 0.581 Test Report ------------------------------------------------------------------------------ 6/6 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 (3)Frequency: 785.704 MHz The maximum field measured is –4.78 dBm FI ( Volt ) = 10 92.597/20 X 10 -6 = 0.042643V FI ( mW ) = (0.042643 X 3 ) 2 / 49.2 = 0.0332638 mW Angle of Turn Table ( °) Spectrum Reading (dBm) Corrected (dB) Actually Value (dBV/m) E. R. P. (mW) Average (mW) 0° 0.142 45° 0.221 90° 0.023 135° 0.299 180° 0.232 225° 0.186 270° 0.129 315° 0.049 0.160

Test Report ------------------------------------------------------------------------------ 1/1 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 FCC ID : NTMEJ8LT-WT480T Explanation of Q1 of Correspondence Reference Number 21296 The 2.660 mW was due to spike noise when testing. So I re-do it again. (1)Frequency: 700.704 MHz The maximum field measured is 3.015 dBm FI ( Volt ) = 10 100.392/20 X 10 -6 = 0.104616 V FI ( mW ) = (0.104616 X 3 ) 2 / 49.2 = 2.002 mW Angle of Turn Table ( °) Spectrum Reading (dBm) Corrected (dB) Actually Value (dBm) E. R. P. (mW) Average (mW) 0° 0.711 45° 0.817 90° 0.566 135° 1.482 180° 1.811 225° 0.445 270° 0.361 315° 0.025 0.7773

Test Report ------------------------------------------------------------------------------ 1/1 Report No.: E1474219 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 FCC ID : NTMEJ8LT-WT480T Q2 of Correspondence Reference Number 21296 15KHz modulation without 38 kHz tone frequency