B5DB116Wireless Microphone Transmitter

Preliminary Users Manual, Telex FMR-500 System, Electro-Voice RE-2 System. Telex Model FMR-500 Wireless Microphone Receiver, Electro-Voice RE-2 Receiver. Telex Model WT-500 Wireless Beltpack Transmitter, Electro-Voice BPU-2 Beltpack Transmitter. Telex Model HT-500 Wireless Handheld Transmitter, Electro-Voice HTU-2 Handheld Transmitter. The components above form the Telex or Electro-Voice Wireless Microphone System. Each system is designed to be used in Live Sound Reinforcement applications where Sound Quality and Reliability are of prime importance. Simplicity of operation is assured along with flexibility for varying venues. Operating features and cosmetics are slightly different Between Telex and Electro-Voice (Ev) models but are electrically identical. Features: Receiver.... • Phase Locked Frequencies for stable Operation. • 950 Radio Channels, user programmable or factory installed. • LCD Display for ease of viewing. • Adjustable Line Level ¼ inch output jack. • Fixed Microphone Level XLR output jack. • Adjustable Microphone to Line Level XLR output level. • Front Panel Power ON/OFF Switch. • Input RF Filters cover 24 MHz Bandwidth (4 TV Channels). • SAW Filter 1 st I.F for out of band rejection. • Triple ceramic filters in 2 nd I.F for adjacent channel rejection. • Front panel Voice/Guitar selection. • Auto-selects voice/Guitar audio frequency characteristics. • Permanent Memory for frequency/system storage. • Front Panel Software Control of Squelch settings and channel monitor. • Double Squelch. Amplitude and Tone Squelch system prevents false squelch opening. • Auto-Select “Clear-Scan” of frequencies speeds set-up time.Telex FMR-500/RE-2 System Page 2 Handheld Transmitter...... • 950 Radio Channels, user programmable or factory installed. • Phase Locked Frequencies for Stable Operation. • Efficient current drain vs. power system. • Patented Internal Dipole antenna eliminates wires or “rubber duck” antennas. • Specially shaped Handle with “softpaint” for comfort and low handling noise. • 9 Volt Alkaline “rattle-proof” battery area. • Low Profile Audio Mute and Power Switch. • LCD Display for ease of viewing. • On-board frequency program and menu switch. • Permanent Memory for frequency/system storage. • Transmit Tone for squelch control. • Microphone Gain control for talent set-up. • Low Battery Gauge. Beltpack Transmitter..... • 950 Radio Channels, user programmable or factory installed. • Phase Locked Frequencies for Stable Operation. • Efficient current drain vs. power system. • Flexible wire rope replaceable antenna. • Microphone/Instrument input connector for personal selection of microphones/instruments. • Small Case Footprint for ease of wear. • Non detachable battery door with dual latches. • 9 Volt Alkaline battery operation. • Low Profile Power Switch. • LCD Display for ease of viewing. • On-board frequency program and menu switch. • Permanent “Memory” for frequency/system storage. • Transmit Tone for squelch control. • Microphone Gain control for talent set-up. • Low Battery Gauge. FMR-500/RE-2 System Page 3 General System Specifications: Operating Frequency Range.................614-746 MHz, in 24 MHz wide bands. Frequency Stability........................... 50 PPM. (18 PPM Euro). Channels.......................................950 (25 KHz steps). RF Power Output..............................30 mW conducted, 0.18W ERP. Modulation Type..............................FM, 40 KHz Deviation. Audio Frequency Range......................50-15000 Hz, +/- 2 db. (50-15000 Hz instruments) (100-15000 Hz microphones). (actual frequency response depends on capsules/instrument). Audio Frequency Distortion..................0.5 % THD @ 1000 Hz typical. Audio Frequency Dynamic Range...........100 db. Audio Frequency Signal/Noise Ratio........100 db. Temperature Range.............................-18 deg.C to 54 deg. C. Receiver: Sensitivity......................................1.0 uV for 12 db SINAD typical. Image Rejection...............................60 db typical. Spurious Rejection............................60 db typical. Selectivity......................................230 KHz at –6 db points. Modulation Acceptance.......................40 KHz nominal deviation. Squelch Type...................................Tone with Amplitude Backup. Squelch Adjustment Range...................0 to 100 uV typical. Squelch Quieting...............................100 db typical. Audio Output, Fixed mic level...............300 mV RMS/100K load typical. (XLR Connector, balanced output) Audio Output, line level.......................775 mV RMS/100K load typical. (Quarter Inch Connector, unbalanced output) Audio Output, Adjustable, 10mV to 1.55 V RMS/100K load typical. (XLR Connector, balanced output) Audio Signal to Noise ratio....................94 db A Weighted. Audio Distortion (system).....................0.5 % THD typical. Audio Frequency Response, instruments.....50-15000 Hz, +/- 2 db (system). Audio Frequency Response, microphones...100-15000 Hz, +/- 2 db (system). (actual voice response depends on the microphone/instrument.) FMR-500/RE-2 System Page 4 Beltpack Transmitter. RF Power Output................................ 30 mW typical, Terminated. Antenna............................................1/4 Wave flexible. Modulation, FM........................................40 KHz Deviation. Modulation Limiter..............................Limiter/Compressor. Audio Input.......................................7.75 mV for 40 KHz Deviation. (77.5 mV for instruments). Power...............................................9.0 VDC (Alkaline). Handheld Transmitter. RF Power Output................................ 30 mW typical, Terminated. Antenna............................................Internal ½ Wave Dipole. Modulation, FM........................................40 KHz Deviation. Modulation Limiter..............................Limiter/Compressor. Audio Input.......................................395 mV for 40 K…

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Telex Communications, Inc. 8601 E. Cornhusker Hwy Lincoln, NE 68507 USA Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: B5DB116 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Block Diagram Schematics Parts List Operation Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Charles E. Conner

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ID LABEL LOCATION INFO

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WT-500 ALIGNMENT PROCEDURE 1. Solder coaxial cable from TP11 to ground to feed frequency counter, deviation meter and spectrum analyzer. 2. Connect audio source of 8mv at 1kHz to TP2 (hot) and TP1 (ground). 3. Connect 9VDC to battery contacts (because of autopolarity circuit + can be connected to either contact). 4. Adjust user gain control maximum clockwise and actuate user power switch. 5. If frequency is not displayed, press set and down simultaneously until frequency appears. 6. Adjust VC1 for this frequency. 7. Adjust VR3 for 40kHz deviation. 8. Remove audio input and adjust VR2 so that the 31.25kHz sidebands are at –30dBc.

APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc TABLE OF CONTENTS APPLICANT: Telex Communication Inc. FCC ID: B5DB116 TABLE OF CONTENTS LIST TEST REPORT CONTAINING: PAGE 1........ GENERAL INFORMATION & TECHNICAL DESCRIPTION PAGE 2.........TECHNICAL DESCRIPTION CONT. & RF POWER TEST PROCEDURE PAGE 3.........AUDIO FREQUENCY RESPONSE GRAPH MODULATION LIMITING PLOT – 300 Hz PAGE 4.........MODULATION LIMITING PLOT – 2500 Hz MODULATION LIMITING PLOT – 15000 Hz AUDIO LOW PASS FILTER PAGE 5.........OCCUPIED BANDWIDTH PAGE 6-7.......RADIATED EMISSIONS TEST DATA PAGE 8.........METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 9.........FREQUENCY STABILITY TEST DATA PAGE 10-12.....EQUIPMENT LIST EXHIBITS CONTAINING: EXHIBIT 1.......LABEL SAMPLE EXHIBIT 2.......LABEL LOCATION EXHIBIT 3.......BLOCK DIAGRAM EXHIBIT 4.......SCHEMATICS EXHIBIT 5.......ALIGNMENT PROCEDURE EXHIBIT 6.......OPERATIONAL DESCRIPTION EXHIBIT 7.......PARTS LIST EXHIBIT 8.......USER'S MANUAL EXHIBIT 9.......TEST SET UP PHOTOGRAPH EXHIBIT 10......EXTERNAL PHOTOGRAPHS EXHIBIT 11......INTERNAL PHOTOGRAPHS APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc Page 1 of 12 GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE 2.1033(c)(1) Telex Communication Inc. will manufacture the B116 in 2.1033(c)(2) quantity, for use under FCC RULES PART 74.801, LOW POWER AUXILIARY STATIONS. Telex Communication Inc. 8601 E. Cornhusker Highway PO Box 5579 Lincoln, Nebraska 68505-5579 USA 2.1033 TECHNICAL DESCRIPTION (c)(3) Instruction book. The instruction manual is in- cluded as Exhibit 8. (c)(4) Type of Emission: 130K0F3E Bn = 2M + 2DK M = 20000 D = 45kHz(Peak Deviation) K = 1 Bn = 2(15k) + 2(45k)(1) = 120k ALLOWED AUTHORIZED BANDWIDTH = 200kHz. 74.861(e)(5) (c)(5) Frequency Range: Part 74: 614-746 MHz TEST FREQ = 698.1 MHz. 721.9 MHz. (c)(6) Power Range and Controls:UNIT has no controls. (c)(7) Maximum Output Power Rating: 0.03 Watts into 50 ohms resistive load. (c)(8) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY 9.0V BATTERY Vce = 9.0 Volts Ice = 28 mA. (c)(9) Tune-up procedure. The tune-up procedure is given in page 5. (c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT # 4. The block diagram is included as EXHIBIT #3. APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc Page 2 of 12 2.1033(c)11) Photo or Drawing of Label and sketch of location: See EXHIBIT # 1 & 2. 2.1033(c)12) Photos of Equipment: See EXHIBIT #'S 10-11. (c)(13) Description of all circuitry and devices provided for determining and stabilizing frequency. Description of any circuits or devices employed for suppression of spurious radiation, for limit- ing modulation, and for limiting power. This circuitry is described on page 6. Limiting Modulation: The transmitter audio circuitry is contained in IC101, IC102 and IC103. Limiting Power: There is no provision for limiting power. (13) Digital modulation. This unit does not use digital modulation. 2.1033(c)(14) The data required by 2.1046 through 2.1057 is sub- mitted below. 2.1046 RF power output. RF power measured is: OUTPUT POWER: 0.03 WATTS CONDUCTED 0.018 WATTS ERP R.F. POWER OUTPUT TEST PROCEDURE Transmitter 50 ohm under test Watt Meter Audio Oscillator APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc Page 3 of 12 2.1047(a)(b) Modulation characteristics: AUDIO FREQUENCY RESPONSE The audio frequency response was measured in accordance with TIA/EIA Specification 603. The audio frequency response curve is shown on below. Audio Frequency Response -25 -20 -15 -10 -5 0 5 100100010000100000 Frequency (Hz) Level in dB Modulation Limiting 300Hz 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 -100-80-60-40-200 dBm Deviation APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc Page 4 of 12 Modulation Limiting 2500Hz 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 -100-80-60-40-200 dBm Deviation Modulation Limiting 15kHz 0 5 10 15 20 25 30 35 40 45 -100-80-60-40-200 dBm Deviation AUDIO LOW PASS FILTER The audio low pass filter is not required in this unit. APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc Page 5 of 12 2.1049(c) Occupied Bandwidth: Data in the plots show that all sidebands between 50 & 100% for the authorized bandwidth are attenuated by at least 25dB. From 100 to 250% of the authorize3d band- width they are attenuated by at least 35dB and beyond 250% 43 log(Po) dB. The plot shows the transmitter modulated with 15000 Hz(the highest modulation frequen- cy), adjusted for 50% modulation plus 16 dB. The spectrum analyzer was set with the unmodulated carrier at the top of the screen. The test procedure diagram and occupied bandwidth plot follows. Wireless Microphone transmitter: Test procedure diagram OCCUPIED BANDWIDTH MEASUREMENT Transmitter Coupler 50 ohm under test Resistive Load Audio Spectrum Oscillator Analyzer REQUIREMENT: PART 74: 200kHz EMISSION BANDWIDTH. APPLICANT: Telex Communication Inc. FCCID: B5DB116 REPORT #: T\TELEX\642AUT3\642AUT3TestReport.doc Page 6 of 12 2.1051 Spurious emissions at antenna terminals(conducted): Not Applicable no antenna connector. 2.1053(a)(b) Field strength of spurious emissions: NAME OF TEST: RADIATED SPURIOUS EMISSIONS REQUIREMENTS: Emissions must be 43 +10log(Po) dB below the mean power output of the transmitter. 43 + 10 log(0.03) = 27.77 dB TEST DATA: Emission Frequency (MHz) Polarity Antenna Corrected EUT Signal Reading (dBm) Coax Loss Sub. Ant. dB Below Carrier (dBc) 698.10 V 12.50 0 0 0.00 1396.20 H -25.20 1 3.17 35.53 2094.30 H -18.40 1.2 5.24 26.86 2792.40 H -31.20 1.3 6.74 38.26 3490.50 H -30.40 1.35 7.2 37.05 4188.60 V -47.90 1.45 7.45 54.40 4886.70 V -47.90 1.5 8.29 53.61 5584.80 H -47.50 1.7 8.61 53.09 6282.90 H -46.90 1.9 9.12 52.1…

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