B5DH219Wireless Microphone Transmitter

Preliminary Users Manual, Electro-Voice Model HTU-2 Wireless Microphone Handheld Transmitter The component above is part of a Electro-Voice/Telex Wireless Microphone System. The transmitter 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 Electro-Voice (Ev) and Telex models but both are electrically identical. Features: 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 for comfort and low handling noise. • 9 Volt Alkaline battery operation. • Low Profile Power Switch. • LCD Display for ease of viewing. • On-board frequency program and menu “Set”switch. • Microphone Gain Control. • Loc-Out control to prevent tampering or accidental changes. • Permanent “Memory” for frequency/system storage. • Transmit Tone for squelch control. • Microphone Gain control for talent set-up. • Low Battery Gauge. (read at the receiver). Ev HTU-2/Telex HT-500 Page 2 Specifications: Operating Frequency Range.................518-608, 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 (terminated). Antenna............................................1/2 Wave internal. Modulation Type..............................FM, 40 KHz Deviation. Modulation Limiter..............................Limiter/Compressor. Audio Frequency Range......................100-15000 Hz, +/- 2 db. (actual frequency response depends on capsules/mic elements used). Audio Frequency Distortion..................0.5 % THD @ 1000 Hz typical. Audio Input.......................................7.75 mV for 40 KHz Deviation. Audio Frequency Dynamic Range...........100 db. Audio Frequency Signal/Noise Ratio........100 db. Temperature Range.............................-18 deg.C to 54 deg. C. Power...............................................9.0 VDC (Alkaline). Battery Life.....................8-10 hours typical (Alkaline). Ev HTU-2/Telex HT-500 Page 3 Handheld Transmitter set-up: 1. Before setting up the transmitter, please refer to the RE-2/FMR-500 Receiver manual . If the receiver has been set up, continue to step 2. 2. Install a fresh Alkaline Battery into the transmitter. 3. Insure that the Microphone Gain Control is set at about 50 % of rotation or less. 4. Place the Power Switch in the ON position. The Red Low Battery Light (“Batt”) near the display should “flash” one time if the battery is good. If the light remains on, the battery is weak and should be replaced. No flash at all indicates a dead battery or no battery installed. 5. The screen should display the GP (Group) and CH (Channel) screen. If the Group and Channel agree with the receiver Group and Channel, proceed to the next step. If the Group and Channel do not agree with the receiver, or you wish to change them for any reason, proceed with this step. Press the SET switch one time. The GP number will start flashing. Use the UP (arrow) switch to increase the Group or the Down (arrow) to decrease the Group number. Press Set when the Group desired is displayed. The Channel number will now be flashing. Use the Up or Down arrow to select the desired channel. Press Set when the Group and Channel is selected. 6. Monitor the RE-2/FMR-500 Receiver operating screen. Note that the RF (1-100) Bar Graph should indicate near the 100 bar if the transmitter is close to the receiver. The AF Bar Graph should show very little or no indication until you talk or sing into the microphone. Adjust the Gain Control (small screwdriver adjustment located in the hole between the display and the microphone element) if necessary, to cause the AF bar graph to peak near –3 but not over +3 for best performance. 7. If you are satisfied with the Group/Channel and AF screen displays, the mixer or sound system gain/volume can be increased to monitor the sound. The Handheld System is now ready for use. 8. Switch the Power off when use is complete. Ev HTU-2/Telex HT-500 Page 4 APPROVAL INFORMATION The Electro-Voice/Telex Transmitter is Type Accepted under United States Federal Communications Commission CFR 47, Part 74 and Industry Canada RSS123. Licensing of Electro-Voice/Telex equipment is the users responsibility and Licensability depends upon the users classification, users application and frequency selected. Electro-Voice/Telex strongly urges the user to contact the appropriate telecommunications authority for any desired clarification. CAUTION: Any changes or modifications made to the above equipment could void the users authority to operate the equipment. This device and its antenna must not be co-located or operated in conjunction with any other antenna or transmitter.

HT-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 39mv 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: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.doc TABLE OF CONTENTS LIST APPLICANT: Telex Communication Inc. FCC ID: B5DH219 TABLE OF CONTENTS LIST TEST REPORT CONTAINING: PAGE 1.........TECHNICAL DESCRIPTION PAGE 2.........TECHNICAL DESCRIPTION CONTINUED & RF POWER OUTPUT PAGE 3.........AUDIO FREQUENCY RESPONSE GRAPH AND MODULATION FREQUENCY 300 Hz PAGE 4.........MODULATION FREQUENCY PLOTS – 12.5 kHz, 15 kHz PAGE 5.........OCCUPIED BANDWIDTH PAGE 6.........RADIATED EMISSIONS TEST DATA PAGE 7.........METHOD OF MEASURING RADIATED EMISSIONS PAGE 8.........FREQUENCY STABILITY TEST DATA PAGE 9-12......EQUIPMENT LIST EXHIBITS CONTAINING: EXHIBIT 1.......FCC ID LABEL SAMPLE & ID LABEL LOCATION EXHIBIT 2.......BLOCK DIAGRAM EXHIBIT 3.......SCHEMATICS EXHIBIT 4.......TUNING PROCEDURE EXHIBIT 5.......CIRCUIT DESCRIPTION EXHIBIT 6.......USER'S MANUAL EXHIBIT 7.......PARTS LIST EXHIBIT 8.......TEST SET UP PHOTOGRAPH EXHIBIT 9.......EXTERNAL PHOTOGRAPHS EXHIBIT 10......INTERNAL PHOTOGRAPHS EXHIBIT 11......CONFIDENTIALTY LETTER APPLICANT: Telex Communication Inc. FCCID: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.doc Page 1 of 12 GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE 2.1033(c)(1) Telex Communication Inc. will manufacture the B5DH219 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 2.1033 TECHNICAL DESCRIPTION (c)(3) Instruction book. The instruction manual is in- cluded as Exhibit 6. (c)(4) Type of Emission: 120K0F3E Bn = 2M + 2DK M = 20000 D = 40kHz(Peak Deviation) K = 1 Bn = 2(20k) + 2(40k)(1) = 120k ALLOWED AUTHORIZED BANDWIDTH = 200kHz. 74.861(e)(5) (c)(5) Frequency Range: Part 74: 614-746 MHz TEST FREQ = 698.10 MHz and 721.90 MHz (c)(6) Power Range and Controls:UNIT has no controls. (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 4. (c)(10) Complete Circuit Diagrams: The circuit diagram is included as EXHIBIT # 3. The block diagram is included as EXHIBIT # 2. APPLICANT: Telex Communication Inc. FCCID: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.doc Page 2 of 12 2.1033(c)11) Photo or Drawing of Label and sketch of location: See EXHIBIT # 1. 2.1033(c)12) Photos of Equipment: See EXHIBIT #'S 9-10. (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 5. 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: .0033 WATTS ERP OUTPUT POWER: 0.03 WATTS CONDUCTED R.F. POWER OUTPUT TEST PROCEDURE Transmitter 50 ohm under test Watt Meter Audio Oscillator APPLICANT: Telex Communication Inc. FCCID: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.doc Page 3 of 12 2.1047(a)(b) Modulation characteristics: AUDIO LOW PASS FILTER The audio low pass filter is not required in this unit. AUDIO FREQUENCY RESPONSE The audio frequency response was measured in accordance with TIA/EIA Specification 603. The audio frequency response curve is shown below. Audio Frequency Response -10 -8 -6 -4 -2 0 2 4 100100010000100000 Frequency (Hz) Level in dB Modulation Limiting 300Hz 0 5 10 15 20 25 30 35 40 45 -80-70-60-50-40 Level in dBm Deviation APPLICANT: Telex Communication Inc. FCCID: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.doc Page 4 of 12 Modulation Limiting 2.5 KHz 0 5 10 15 20 25 30 35 40 45 -80-60-40 Level in dBm Deviation Modulation Limiting 15 kHz 0 5 10 15 20 25 30 35 40 45 -80-70-60-50-40 Level in dBm Deviation APPLICANT: Telex Communication Inc. FCCID: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.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 plots follow. WIRELESS MICROPHONE TRANSMITTER TEST PROCEDURE DIAGRAM Transmitter Coupler 50 ohm under test Resistive Load Audio Spectrum Oscillator Analyzer REQUIREMENT: PART 74: 200kHz EMISSION BANDWIDTH. APPLICANT: Telex Communication Inc. FCCID: B5DH219 REPORT #: T\TELEX\662AUT3\662AUT3TestReport.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) 698.10V 5.20 0 0 0.00 1396.20H -34.00 1 3.17 37.03 2094.30H -36.20 1.2 5.24 37.36 2792.40V -48.60 1.3 6.74 48.36 3490.50V -46.30 1.35 7.2 45.65 4188.60H -44.80 1.45 7.45 44.00 4886.70V -44.00 1.5 8.29 42.41 5584.80H -46.50 1.7 8.61 44.79 6282.90H -47.70 1.9 9.12 45.68 6981.00H -48.50 2 8.9 46.80 Emission Frequency (MHz) Polarity Antenna Corrected EUT Signal Reading (dBm) Coax Loss Sub. Ant. dB Below Carrier (dBc) 721.90V 5.00 0 0 0.00 1443.80H -33.40 1.00 3.17 36.23 2165.70H -33.60 1.2 5.24 34.56 2887.60V -48.00 1.30 6.74 47.56 3609.50H -45.60 1.4 7.5 …

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