NTMWT-808TWireless Microphone

Oscillation modeCarrier frequency rangeFrequencyMax deviationDynamic rangeT.H.DPre/De-EmphasisPower supply PLL synthesizedpre-programmed 16 switchable frequencies+/-65 KHz ,with level limiting>80 dB<1%<50 s m 1.2V*2AAtypeNi-MHrechargeablebattery or DC IN 5VGroup 1. 744~752 MHz Mike condenser microphone Antenna in side Loop ant. R F output 10 mW (according to regulation) C/N Ratio >110 dB Spurious <-60 dBc Battery 1.2V*2AAtypeNi-MHrechargeablebatteryorDCIN5V Dimensions (L*W*H) 98*66*27 mm Weight 80g (less battery) S peci f ications /S pecial Features O verall system -4- Transmitter Group 2. 794~806 MHz User's Guide UHF-PLL 16-CH Switchable Tour Guilde & Wireless Mic. Systems WT-808T F unc ti on 6. 3.5mm MIC. Input jack Using condenser MIC., when AUX with inpout,3.5mm MIC off. 3.Power switch & MIC. Volume (1)Turn clockwise for Turn-ON and MIC. Volume control , Min MAX. (2)Turn anti-clockwise for Turn-off and MIC. Volume control , MAX Min . 5.Built-In MIC (1)When MIC or AUX with input, built-in microphone off.(2)When MIC and AUX without input, built-in microphone on. 1.Channel Selection (1) with16 ch. Selectable. 2.Tx LED Indicator (1)When turn on,LED light up GREEN indicates transmission normally. (2)After using a period of time,LED light RED indicated low battery, and still with transmission could stayfor about 30 minutes. 4.PL LED Indicator (1)When indicate Red light and stop working, battery need to recharging or change New batteries. 7. 3.5mm Aux Input jack For connecting MP3 , CD play audio source , and sendaudio source to receiver. 8.DC Input & Recharging jack Could connect +5V switching adapter to provide poweror slow recharging internal rechargeable batteries. PL TX OFF CH. MIC. 1 2 16 -2- -3- 12.Battery cover11.Rechaging bottom jack Could connecting to charger HDC-808 for fast charging internal batteries. please use 2 pcs AA size Ni-MH. rechargeablebattery . 10.Battery box (1)This system also could use AA type dry cell battery , but please do not put themon charging stand for recharging. (2)When recharging the transmitter , 9 .Belt clip 3.Applicable Occasion : Tour Guide , Museum and Factory visit, Oral multi-languages translating system , Journalist V8 voice recording , audio-visual language teaching , assist wireless amplification system etc, 1. WT-808T transmitter, with built-in microphone, and also could work for with lapel microphone or headset microphone. Features:2. WT-808T could use DC +5V switching adapter to provide power or recharging the internal battery, and could use charger (HDC-808)for recharging internal battery.

1 Mike Kuo From: iris [[email protected]] Sent: Tuesday, July 12, 2005 8:32 PM To: Michael Heckrotte Cc: Mike Kuo; Helen Zhao Subject: Fw: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: AN05T4852, Notice#1 Attachments: WT-808T Transmitter Principle.pdf; Exhibit-C-Test_Report-revised.pdf WT-808T ransmitter Principle. Exhibit-C-Test_Rep ort-revised.... From: "ssliou" <[email protected]> To: <[email protected]> Cc: "Helen Zhao" <[email protected]>; "R00/林慧君" <[email protected]>; "Mike Kuo" <[email protected]> Sent: Thursday, July 07, 2005 7:17 PM Subject: Re: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: AN05T4852, Notice#1 > Dear Sir, > > #1 Please see attached file WT-808T Transmitter Principle.pdf > #2 We are sorry for the typo misleading you. Please find attached > revised test report. > #3 The antenna is permanently mount on the PCB board. The antenna gain > is 0 > dBi. > > Best regards, > > S. S. Liou > Engineer / EMC Dept. II > Electronics Testing Center, Taiwan > > > ----- Original Message ----- > From: "iris" <[email protected]> > To: "R00/???" <[email protected]> > Sent: Wednesday, July 06, 2005 10:11 AM > Subject: Fw: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: > AN05T4852, Notice#1 > > > > > > ----- Original Message ----- > > From: "Compliance Certification Services" <[email protected]> > > To: <[email protected]> > > Cc: <[email protected], [email protected], > > [email protected], [email protected]> > > Sent: Tuesday, July 05, 2005 5:16 PM > > Subject: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: > > AN05T4852, Notice#1 > > > > > > 1. Per 2.1033(c) 10 of the Rules please submit a circuit 2 > > description to accompany the schematic and block diagram already > > submitted > > > > 2. Test report shows unmodulated carrier at 0.70 mW and modulated > > erp at > > 0.354 mW. Please explain this apparent discrepancy > > > > 3. Please provide product antenna description and gain > > > > > > The items indicated above must be submitted before processing can continue > > on the above referenced application. Failure to provide the > > requested information within 30 days of the original e-mail date may > > result in application dismissal and forfeiture of the filing fee. > > Also, please note > > that partial responses increase processing time and should not be > submitted. > > Any questions about the content of this correspondence should be directed > to > > the e-mail address listed below the name of the sender. > > > > >

Mike Kuo From: Helen Zhao Sent: Tuesday, August 30, 2005 10:26 AM To: Mike Kuo Subject: FW: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: AN05T4852, Notice#3 Attachments: Exhibit-C-Test_Report-revised-2.pdf 8/31/2005 -----Original Message----- From: ssliou [mailto:[email protected]] Sent: Sunday, August 28, 2005 7:38 PM To: Helen Zhao Cc: iris Subject: Re: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: AN05T4852, Notice#3 Dear Helen, Please find attached revised test report. The modulation limiting data has been retested. Best regards, S. S. Liou Engineer / EMC Dept. II Electronics Testing Center, Taiwan ----- Original Message ----- From: iris To: R00/??? Sent: Wednesday, July 27, 2005 11:06 AM Subject: Fw: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: AN05T4852, Notice#3 ----- Original Message ----- From: Helen Zhao To: Iris Lin (E-mail) Sent: Wednesday, July 27, 2005 8:17 AM Subject: E-J ELECTRONICS CO., LTD., FCC ID: NTMWT-808T, Assessment NO.: AN05T4852, Notice#3 Hello Iris, I don't know if you have received the following question: Upon further review it appears that there is a discrepancy between the declared FM deviation of 65 kHz and the modulation limiting at 26 kHz. Occupied bandwidth appears to be consistent with 65 kHz. Please indicate correct FM deviation level and submit modulation limiting data consistent with the actual FM deviation used with this product. The items indicated above must be submitted before processing can continue on the above referenced application. Failure to provide the requested information within 30 days of the original e-mail date may result in application dismissal and forfeiture of the filing fee. Also, please note that partial responses increase processing time and should not be submitted. Any questions about the content of this correspondence should be directed to the e-mail address listed below the name of the sender.

ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT A. 744-752MHz Rear View of EUT Bottom View of EUT ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Side View of EUT SideView of EUT ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT B. 794-806MHz Front View of EUT Rear View of EUT ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Side View of EUT SideView of EUT ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT C. Adaptor Top View of Adaptor Bottom View of Adaptor ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Side View of Adaptor Side View of Adaptor

This device complies with part 74 of the FCC Rules FCC ID : NTMWT-808T This device complies withpart 74 of the FCC RulesFCC ID : NTMWT-808T

ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Internal View of EUT ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Component View of PCB Solder View of PCB ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Component View of PCB Solder View of PCB ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Internal View of EUT ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Component View of PCB Solder View of PCB ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Component View of PCB Solder View of PCB ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 CONSTRUCTED PHOTOS of EUT Component View of Adaptor’s PCB Solder View of Adaptor’s PCB

WT-808T transmission principle Inside mike input the audio signal. Pass to U5 make the ALC (AUTO level control) for The audio signal. If used the CD and mp3 please use the Line in. The control sequence is MIC MIC IN Line IN. After ALC amplifier come to Pre-emphasis R20,21,C31,32 . Then signal pass to U10 compandor system. The compandor combine Tone Key to VCO (Voltage control oscillator) modulation. By changed RF signal will come to the Buffer U6 and pass Q9 for RF amplifier. Lastly pass to Q8 (RF amplifier) and Low pass filter. VCO Module principle: channel switch set the channel. The programmer (U9) will control (U7) PLL system. PLL system will send the controlled voltage for VCO. Then VCO will send frequency to U7 contrast. If OK fixed voltage. Booster and Lamp principle: Power on delay 100mS for the Q1,Q2,D2. Then pass to DC/DC convertor and send +3.6V to AF system. The VCO and RF amplifier use +3.3V for constant voltage regulator. The LED green are +3.3V. If changed Red the voltage are +2.2V. If LED2 changed Red the power and Tone will auto off.

WT-808T Tune-up Procedure VCO 1. The modulation level can adjust by VR4. 2. The pilot tone level can adjust by VR3. 3. The audio frequency is modulated which can get RF signal via modulator VCO. 4. Adjust VC2 and VC1 to correct the reference frequency. 5. The antenna efficiency can adjust by VC3. 6. The Osc. Signal coupled to drive amplifier Q9 and power amplifier Q8 to getbetter RF level.

Rev. 2.0 FCC Part 74 Subpart H EMI TEST REPORT of E.U.T. : Wireless Microphone (Transmitter) MODEL : WT-808T FCC ID. : NTMWT-808T Working Frequency : 740-806MHz for APPLICANT : E-J Electronics Co., Ltd. ADDRESS : 4F, NO.11, Lane 125, Sec 1, Kuo Kwang Rd., Ta Li City,Taichung Hsien,Taiwan. Test Performed by ELECTRONICS TESTING CENTER, TAIWAN NO. 34, LIN 5, DING FU TSUN, LINKOU HSIANG TAIPEI HSIEN, TAIWAN, R.O.C. Tel:(02) 26023052 Fax:(02)26010910 http://www.etc.org.tw ; e-mail : [email protected] Report Number : ET94R-05-043-01 ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 TEST REPORT CERTIFICATION Applicant : E-J Electronics Co., Ltd. 4F, NO.11, Lane 125, Sec 1, Kuo Kwang Rd., Ta Li City,Taichung Hsien,Taiwan. Manufacturer : E-J Electronics Co., Ltd. 4F, NO.11, Lane 125, Sec 1, Kuo Kwang Rd., Ta Li City,Taichung Hsien,Taiwan. Description of EUT a) Type of EUT : Wireless Microphone (Transmitter) b) Trade Name : E-J c) Model No. : WT-808T d) Power Supply : Power Adaptor I/P: AC 100-240V(47-63Hz), 0.15A, Max O/P: DC5V, 1A, 5W, Max; Battery 1.5Vx2 e) Frequency Range : 740MHz-806MHz Regulation Applied : FCC Rules and Regulations Part 74 Subpart H (2003) I HEREBY CERTIFY THAT; The data shown in this report were made in accordance with the procedures given in ANSI C63.4 and the energy emitted by the device was founded to be within the limits applicable. I assume full responsibility for accuracy and completeness of these data. Note: 1. The result of the testing report relate only to the item tested. 2. The testing report shall not be reproduced expect in full, without the written approval of ETC. Issued Date : May 24, 2005 Test Engineer : (Vicent Chang) Approve & Authorized Signer : Will Yauo, Manager EMC Dept. II of ELECTRONICS TESTING CENTER, TAIWAN ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 Table of Contents Page 1 GENERAL INFORMATION...................................................................................................1 1.1 Product Description...................................................................................................................1 1.2 Characteristics of Device:...........................................................................................................1 1.3 Test Methodology......................................................................................................................1 1.4 Test Facility...............................................................................................................................1 2 REQUIREMENTS OF PROVISIONS.....................................................................................2 2.1 Definition...................................................................................................................................2 2.2 Frequencies Available................................................................................................................2 2.3 Requirements for Radio Equipment on Certification.....................................................................2 2.4 Labeling Requirement.................................................................................................................3 3 OUTPUT POWER MEASUREMENT.....................................................................................4 3.1 Provision Applicable..................................................................................................................4 3.2 Measurement Procedure............................................................................................................4 3.3 Test Data...................................................................................................................................6 3.4 Result Calculation.......................................................................................................................8 3.5 Test Equipment..........................................................................................................................8 4 MODULATION CHARACTERISTICS..................................................................................9 4.1 Provisions Applicable.................................................................................................................9 4.2 Measurement Method................................................................................................................9 4.3 Measurement Instrument..........................................................................................................10 4.4 Measurement Result.................................................................................................................10 5 OCCUPIED BANDWIDTH OF EMISSION.........................................................................14 5.1 Provisions Applicable...............................................................................................................14 5.2 Measurement Method..............................................................................................................14 5.3 Occupied Bandwidth Test Equipment.......................................................................................14 5.4 Bandwidth Measured...............................................................................................................15 6 FIELD STRENGTH OF EMISSION.....................................................................................17 6.1 Provisions Applicable...............................................................................................................17 6.2 Measurement Procedure..........................................................................................................17 6.3 Measuring Instrument...............................................................................................................18 6.4 Measuring Data...............................................................................................................…

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ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 Radiated Measurement Photos Mode: Tx ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 Mode: Charge Tx ETC Report No.:ET94R-05-043-01 FCC ID.: NTMWT-808T Rev. 2.0 Photos of Conduction Measuring Setup Mode : Charge Tx