JEBDX-837Wireless Microphone
Mascot Electric Co., Ltd.
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Application Details
- Equipment Class
- TBF - Licensed Broadcast Transmitter Held to Face
- Date of Grant
- Mar 05, 2002
- Application Purpose
- Original Equipment
- Date of Application
- Jan 06, 2002
- Equipment Note
- Wireless Microphone
- Frequency Range
- 790.37500000 - 805.37500000
- Company
- Mascot Electric Co., Ltd.
- Country
- Taiwan
Documents & Files
Document Text
Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.
Users Manual
DX-837 UHF BAND PLL SYNTHESIZED WIRELESS GOOSENECK MICROPHONE FEATURES β Operating on UHF band frequency range 790~806MHz with PLL synthesized control. β PLL (Phase Locked Loop) synthesized wireless microphone system with 16 switchable frequencies makes it easy to choose non-interference channels. β DX-837 wireless desktop microphone is well suitable for broadcasting, meetings & speech in public areas. β DX-837 is equipped with slim & flexible gooseneck, beautiful & rugged microphone with multi-function panel. β DX-837 equipped with professional uni-directional electret condenser unit to avoid sounds coming from the sides & rear of the microphone to perform high sensitivity, wide-range frequency response, bright & crisp sound reproduction. β The mic features Hi, Normal or Low audio frequency selector, on/off and volume control to control the microphone signal output. Special circuitry design to eliminate β popβ audio on/off switch. β Operation on UHF band equipped with high sensitivity, reliable receiver to ensure the high quality RF & AF reproduction. β The service area is about 50~100M. β Powered by 2 x UM-3 batteries. Over 7 hours continuous operation. With one LED to indicate battery strength. When the LED turns from green to red color, please replace a new battery. β This microphone has LINE IN audio jack to extend the service area and sensitivity by connecting various audio resources or another desktop microphone. SPECIFICATIONS Frequency Range.........................UHF 790~806MHz RF Power Output..........................30mW max. Oscillation Mode..........................PLL Synthesized, 16-CH Frequency Stability.......................Β±0.005% with quartz controlled Maximum Deviation....................... Β±15KHz with limiting compressor Suprious Emission........................Less than β43dB below carrier frequency T.H.D. ........................................Less than 0.5% (at 1KHz) Power Supply..............................UM-3(AA size)x2 Battery Life..................................about 7~8 hours continuous operation. Tone Key.....................................32KHz tone key control Mic Unit......................................Uni-directional condenser type LED Indicator...............................Power ON-OFF & Low battery & TALK indicator Dimensions(Gooseneck)................25Οx340mm Base(LxWxH)..............................151mmx125mmx40mm NAME OF COMPONENT FRONT PANEL UHF PLL SYNTHESIZED TRANSMITTER HI OFF LOW ON OFF PWR PUSH TO TALK/PUSH OFF SWITCH FILTER SELECTOR TO CHOOSE HI FREQUENCY POWER ON/OFF AND VOLUME CONTROL OR LOW FREQUENCY TALK INDICATOR POWER INDICATOR REAR PANEL 4P CONNECTOR CONNECTING DIAGRAM CHANNEL SELECTOR OPERATION 1. Push to open the battery cover under the base. 2. Insert two UM-3 batteries into the battery compartment according to polarity (+) and (-) indication marked on the battery housing. 3. Fit battery cover back. 4. Turn the volume with power-on-off switch to βONβ firstly, the Power indicator will be lighted in green to indicate the carrier frequency is sent out. Push TALK button to the second step, the TALK indicator will be lighted to indicate the microphone is operating. 5. Use the Volume control to set the output level and the Filter Selector to choose Hi, Low or Normal audio frequencies as you like. 6. When you do not want to talk, push the TALK button again and the TALK indicator will fade away. 7. Turn the power button to βOFFβ when mic is not used, and remove the battery if not used for a long time. This will prevent from the damage that a defective βleakingβ battery may cause. 8. Turn the power "ON", the power indicator lighted in green means that power supply is normal and the power indicator turned to red means that the battery is in need of replacement. CONNECTING DIAGRAM WIRELESS GOOSENECK MICROPHONE WITH WIRELESS RECEIVER DX-837 WIRELESS GOOSENECK MICROPHONE AND ED-337 DX-837 ED-337 CONDENSER GOOSENECK MICROPHONE WITH WIRELESS RECEIVER LINE IN AUDIO JACK TO CONNECT VARIOUS RESOURCES OR ANOTHER DESKTOP MIC SUCH AS ED-337 23 1 4 SHIELDED CABLE SIGNAL GROUND CH 1CH2CH 3 CH 4 CH5 CH6CH 7 CH 8 CH 9 CH 10CH11 CH 12 CH 13CH14CH15 CH 16 CH1CH2CH3CH4 790.375791.125792.125793.250 CH5CH6CH7CH8 794.250795.125796.250797.375 CH9CH10CH11CH12 798.375799.875800.875801.625 CH13CH14CH15CH16 802.750803.875804.750805.375 MHz
ID Label/Location Info
LABEL Format: This device complies with Part 74 of the FCC Rules FCC ID:JEBDX-837 LABEL Size: 45 x 11 mm LABEL Position:
Test Report
Test Report ------------------------------------------------------------------------------ 2/45 Report No.: M1274915 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Contents CHAPTER 0 APPLICATION FOR CERTIFICATION........................4 CHAPTER 1 GENERAL.........................................................................5 1.1INTRODUCTION..................................................................................5 1.2DESCRIPTION OF SUPPORT EQUIPMENT..............................................5 1.3CONFIGURATION OF TEST SETUP.......................................................6 1.4LOCATION OF THE MEASUREMENT SITE.............................................6 1.5GENERAL TEST CONDITION................................................................6 CHAPTER 2 CONDUCTED EMISSION TEST....................................7 2.1TEST CONDITION AND SETUP..............................................................7 2.2LIST OF TEST INSTRUMENT................................................................7 2.3CONDUCTED EMISSION TEST RESULT.................................................7 CHAPTER 3 POWER OUTPUT MEASUREMENT.............................8 3.1RULES AND SPECIFICATION LIMITS....................................................8 3.2TEST CONDITION AND SETUP..............................................................8 3.3LIST OF TEST INSTRUMENT..............................................................10 3.4MEASUREMENT RESULT..................................................................11 CHAPTER 4 MODULATION CHARACTERISTICS MEASUREMENT...........................................................14 4.1RULES AND SPECIFICATION LIMITS..................................................14 4.2TEST CONFIGURATION & LIST OF TEST INSTRUMENTS.....................14 4.3LIST OF TEST INSTRUMENT...............................................................15 4.4FREQUENCY RESPONSE OF AUDIO MODULATION CIRCUIT AND LOW PASS FILTER MEASUREMENT CONDITION & SETUP................15 4.5MODULATION LIMITING MEASUREMENT CONDITION & SETUP........18 Test Report ------------------------------------------------------------------------------ 3/45 Report No.: M1274915 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 CHAPTER 5 OCCUPIED BANDWIDTH MEASUREMENT.............21 5.1RULES AND SPECIFICATION LIMITS..................................................21 5.2TEST CONFIGURATION & LIST OF TEST INSTRUMENTS.....................21 5.3LIST OF TEST INSTRUMENT..............................................................21 5.4MEASUREMENT PROCEDURE............................................................22 5.5MEASUREMENT RESULT..................................................................22 CHAPTER 6 FIELD STRENGTH OF SPURIOUS RADIATION MEASUREMENT...........................................................29 6.1RULES AND SPECIFICATION LIMITS..................................................29 6.2MEASUREMENT CONDITION & SETUP..............................................29 6.3LIST OF MEASUREMENT INSTRUMENTS............................................32 6.4MEASUREMENT RESULT:..................................................................33 CHAPTER 7 FREQUENCY STABILITY TOLERANCE MEASUREMENT...........................................................39 7.1RULES AND SPECIFICATION LIMITS..................................................39 7.2MEASUREMENT CONDITION & SETUP WITH TEMPERATURE VARIATION.........................................39 7.3LIST OF MEASUREMENT INSTRUMENTS WITH TEMPERATURE VARIATION LIST OF TEST INSTRUMENT...................39 7.4MEASUREMENT CONFIGURATION OF TEMPERATURE VARIATION TEST:....................................................40 7.5MEASUREMENT RESULT WITH TEMPERATURE VARIATION..............41 7.6MEASUREMENT CONDITION & SETUP WITH VOLTAGE VARIATION..........................................................43 7.7CONFIGURATION OF VOLTAGE VARIATION TEST.............................43 7.8MEASUREMENT RESULT WITH VOLTAGE VARIATION......................44 Test Report ------------------------------------------------------------------------------ 4/45 Report No.: M1274915 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. o crystal controlled x frequency synthesized 2.1033( c )( 1 ):WA GOL INDUSTRIAL CO., LTD. β applicant and manufacturer 2.1033( c )( 2 ):The equipment is a transmitter, wireless microphone Model No.: DX-837 2.1033( c )( 3 ):Quantity production is planned. See users manual 2.1033 ( c )( 4 ):Type of emission β F3E- FM Modulation 2.1033( c )( 5 ):100Hz ~ 15kHz 2.1033( c )( 6 ):2.788 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 : 60mA 2.1033( c )( 9 ):Description follows 2.1033( c )( 10 ):Complete circuit diagrams are included. No modification was made 2.1033( c )( 11 ):See label, Instruction sheet to user included 2.1033( c )( 12 ):See photos. 2.1033( c )( 13 ):N/A 2.1033( c )( 14 ):Description follows. 2.1033( c )( 15 ) :N/A 2.1033( c )( 16 ):N/A 2.1033( c )( 17 ):N/A Test Report ------------------------------------------------------------------------------ 5/45 Report No.: M1274915 Training Research Co., Ltd., TEL: 886-2-26935155, Fax: 886-2-26934440 Chapter 1 GENERAL 1.1 Introduction The following measurement report is submitted on behalf of WA GOL INDUSTRIAL CO., LTD. In support of the wireless microphone certification in accordance with FCC Rules 2.1031, 2.1046, 2.1047, 2.1049, 2.1053, 2.1055, 74.801, and 74.861. Description of EUT: EUT:WIRELESS MICROPHONE Model No.:DX-837 Carrier Frequency Range:790.375MHz ~ 805.375MHz RF Power Output:2.788 mW Supply Voltage:DC 3V Supply Current:60 mA Frequency Response:100Hz ~ 15kHz Frequency Stability:0.005% Operating Temperature:β 30β¦
Text truncated - open the document above for the full version.
Contact Information
Applicant
Chia-Yu Chiang(President)
Technical Contact
TRAINING RESEARCH CO., LTD.JACK TSAI
[email protected]886-2-26935155
NO. 2, LANE 194, HUAN-HO STREET, Β· TAIPEI HSIEN, Β· Taiwan
Non-Technical Contact
TRAINING RESEARCH CO., LTD.JACK TSAI
[email protected]886-2-26935155
Technical Specifications
| # | Rule Parts | Frequency Range | Power Output | Emission | Tolerance |
|---|---|---|---|---|---|
| 1 | 74H | 790.375 MHz - 805.375 MHz | 2.78 mW | 155KF3E | 0.0050000000 % |
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