JFZT211Portable Wireless Microphone

Audio-Technica Model ESW-R220/210 and T211/T214 UHF Wireless Microphone System User Information DRAFT Introduction Thank you for purchasing the ESW series wireless microphone system. It is our hope that the system will bring you years of trouble free pleasure and performance. Please follow the information contained in this manual closely as it will assist you in using your equipment effectively. Part 1. Regulatory Requeirements FCC PART 15 COMPLIANCE STATEMENT CANADA RSS-210 COMPLIANCE STATEMENT “This device complies with Part 15 of the FCC rules. Operation is subject to the condition that this device does not cause harmful interference.” “This device complies with INDUSTRY CANADA R.S.S.210, en conformite avec IC:RSS-210/CNR210. Operation is subject to the following conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference received, including interference which may cause undesired operation.” Please not that your ESW Series system operates in a frequency band and in a way which makes is use subject to certain FCC and other regulatory restrictions and licensing requirements. For further information, please contact your local office of the FCC as applicable. Part 2. Using the ESW-T211 Beltpack Transmitter The beltpack transmitter operates on 2 “AA” size batteries. Please make sure that your batteries are fresh. We recommend that you use Alkaline batteries and that you avoid using NiCad if possible. Insert batteries into the battery compartment and slide the battery compartment back into place. Open the rubber cover over the channels selector switch and set the group and channel to the corresponding channels as set on the receiver. Replaces the cover over the rotary switches. Connect your microphone or guitar cables to the connector on the top sides of the transmitter. If you want the low cut to be on, switch this in. Turn the transmitter switch to the on position. Confirm that the receiver is receiving RF and that the audio is passing through the receiver. You are now set to use the system. Part 3. Using the ESW-T214 Handheld Transmitter The handheld transmitter operates on 2 “AA” size batteries. Please make sure that your batteries are fresh. We recommend that you use Alkaline batteries and that you avoid using NiCad if possible. Insert the batteries into the battery compartment and slide the battery compartment cover back into place. To change the channel of operation, unscrew the battery compartment cover and pull the cover back. Locate the channel selector rotary switches. Set the group and channel to the corresponding channel as set on the receiver. Replace the cover over the rotary switches. Turn the transmitter switch to the on position. Confirm that the receiver is receiving RF. Speak directly into the microphone and confirm that audio is passing through the receiver. You are now set to use the system. Part 4. Using the ESW-R210/R220 Receiver The ESW-R210/R220 receivers operate on a 110 VAC plug. Plug the unit into an AC outlet. Push the on/off switch. Confirm that the LED comes on. Check the group and channel setting to confirm that they correspond to the settings of the transmitter. Connect the balanced or unbalanced audio output to your mixer PA system. Adjust the volume setting to the desired level. Speak into the microphone and listen to the audio out at the speaker. If satisfied with the audio quality, you can use the system. ESW Operation specification ESW-R210/R220 Operating Band:728.125-740.500MHz Type of Reception: F3E Frequency Response: 100Hz to 15kHz No. of Channels:100 Audio Output Power: Line level, Unbalanced Signal to Noise Ratio: >80 dBa Antenna Connector: BNC-R type Selectivity: > 50dB Spurious Rejection: > 50dB Receiver Sensitivity: </= uV for 60 dB S/N, (IEC weighted) ESW-T211 Beltpack Transmitter Operating Band:728.125-740.500MHz Type of Modulation:FM, F3E Frequency Response:100Hz to 15kHz No. of Channels:100 Transmitter Power:10 mW nominal Spurious Emissions:Under federal regulations Battery:2 x 1.5V AA size ESW-T214 Handheld Transmitter Operating Band:728.125-740.500MHz Type of Modulation:FM, F3E Frequency Response:100Hz to 15kHz No. of Channels:100 Transmitter Power:10mW nominal Spurious Emissions:Under federal regulations Battery:2 x 1.5V AA

Front View Front View Controls Back View Right Side View Left Side View Top View

Circuit Board – Component Side Circuit Board – Track Side Sub PCB – Component Side Sub PCB – Track Side Inside Cabinet Batter y Pac k

APPENDIX 3 CIRCUIT TO SUPPRESS SPURIOUS RADIATION AND CONTROL MODULATION AUDIO CIRCUIT The audio signal is injected via the HRS connector into the audio circuit composed of the op amp IC101, NJM2115 & compandor IC103, NE575. The signal is compressed via the compandor circuit at a 2:1 ratio and is pre-emphasized. The level of the output signal is controlled by the pot VR302 which is injected into the VCO, VCO501. MODULATOR CIRCUIT The modulator circuit is a direct FM type built around the VCO, VCO501. The modulated output from the VCO is sent to the RF pre-amp and RF final amplifier which boosts the output to a nominal level of 10mW. RF PRE- AMPLIFIER & FINAL AMPLIFIER The 3 transistor amplifier stages, using 2SC5226 type transistors, culminating with a normal transmitter output of 10mW. The output filter comprised of L605, L606, C610,C611, & C612 suppresses the output harmonics and matches the output to the antenna. CIRCUIT TO SUPPRESS SPURIOUS RADIATION & CONTROL MODULATION FCC ID: JFZT211 APPENDIX 3

Subsection 2.983(d)(9): Factory Tune-up Procedure Test Equipment 1. BNC-P Coaxial RF cableAudio Technica custom RF cable 2. DC Power SupplyLeader 836-1.2 3. Audio Signal GeneratorLeader LAG-126S 4. Modulation Meter (FM liner detector)Anritsu MS61A 5. Spectrum AnalyzerAdvantest R3365 6. RF Power MeterAnritsu MS 4803A 7. RF Power SensorAnritsu MA4701A 8. OscilloscopeLeader LS8050 9. DC Volt MeterYokogawa 732 10. PsophometerNational VP-9680A Adjustment of T211 circuit board 1. Install the circuit board A and B of ESW-T211 to connecting jig and to the PCB fixture. 2. Supply 3V from DC power supply to the power supply terminal of T211 3. Connect BNC-P coaxial RF cable with input connector of Spectrum analyzer. 4. Connect BNC-P coaxial RF cable to CN601 terminal of T211. 5. Set T211 to channel “49”. 6. Set the center frequency of Spectrum analyzer to oscillation frequency of T211, and set frequency span to 200KHz. 7. Turn the power switch of T211(SW1) on, and set the SW3 on T211 to “Hi” 8. Make sure that RF signal appears on Spectrum analyzer. 9. It is set as 49 channel, and "VC401" is regulated so that frequency may be set to 734.250MHz. 10. Set the RF signal on Spectrum analyzer to its maximum level by turning the VC601 on T211. 11. Set the RF signal on Spectrum analyzer to its maximum level by turning the VC602 on T211. 12. Remove the BNC-P coaxial RF cable from the input connector of Spectrum analyzer, and connect it to the RF power meter. 13. Make sure that the RF power sensor and RF power meter are connected together. 14. Set the SW1 on T211 to “Low”. 15. Adjust the RF output power to 5.5mW by turning the VR602 on T211. 16. Set the SW1 on T211 to “Hi”. 17. Adjust the RF output power to 10.5mW by turning VR601 on T211. 18. Make sure that on both channel “00” and “99”, the RF out put power stays over 10mW when SW3 of T211 is on “Hi” and that it stays 5mW when SW1 of T211 is on “Low” 19. Input the –36dBV at 1kHz signal from Audio signal generator to the Guitar input of T211 by checking the level of the signal on AC milli voltmeter. 20. Remove the BNC-P coaxial RF cable from RF power meter, then connect it with the input connector of Modulation Meter (FM linear detector). 21. Set T211 to channel “49” and set the frequency range of the Modulation meter (FM linear detector) to the oscillation frequency of T211 22. Make sure that Oscilloscope has no irregular wave. Then, adjust the indicator of Modulation meter (FM linear detector) to 5KHz by turning VR302 on T211. 23. Set T211 to channel “00” and “99”. Make sure that Deviation of the each cannel stays 5KHz/1kHz. 24. Input –56dBV at 1kHz signal from audio signal generator to Mic input of T211 by checking the level of the signal on AC millivolt meter. 25. Set T211 to channel “00” and “99”. Make sure that deviation on each channels stays 5kHz/1kHz. 26. Remove the BNC-P coaxial RF cable from Modulation meter (FM linear detector) then connect it with input connector of the Spectrum Analyzer. 27. Set T211 to channel “49” and make Guitar terminal and Mic terminal of AF input short circuit. 28. Set the Frequency span of Spectrum analyzer to 200KHz. 29. By turning the VR301 on T211, adjust the tone level on Spectrum analyzer 30dB lower than main RF signal. 30. Set the center frequency of Spectrum analyzer to “1.8GHz”. Set the frequency span to “3.5GHz”. 31. Make sure spurious level on Spectrum analyzer stays 30dB lower than main RF signal level.

ENGINEERING STATEMENT For Type Certification of AUDIO-TECHNICA CORPORATION Model: ESW-T211 FCC ID: JFZT211 I am an Electronics Engineer, a principal in the firm of Hyak Laboratories, Inc., Springfield, Virginia. My education and experience are a matter of record with the Federal Communications Commission. Hyak Laboratories, Inc. has been retained by Audio-Technica US, Inc., to make type certification measurements on the ESW-T211 transmitter. These tests made by me or under my supervision in our Springfield laboratory. Test data required by the FCC for type certification are included in this report. It is submitted that the above mentioned transmitter meets FCC requirements and type certification is requested. ______________________________ Rowland S. Johnson Dated: September 6, 2000 A. INTRODUCTION The following data are submitted in connection with this request for type certification of the ESW-T211 transmitter in accordance with Part 2, Subpart J of the FCC Rules. The ESW-T211 is a 6 milliwatt (ERP(d), UHF, frequency modulated, synthesized, transmitter configured as a portable belt- pack for wireless microphone applications under Part 74. Power supply consists of two 1.5V AA cells. B. GENERAL INFORMATION REQUIRED FOR TYPE CERTIFICATION (Paragraph 2.983 of the Rules) 1. Name of applicant: Audio Technica Corporation 2. Identification of equipment: FCC ID: JFZT211 a. The equipment identification label is included as a separate exhibit. b. Photographs of the equipment are included as a separate exhibit. 3. Quantity production is planned. 4. Technical description: a. Emission 81k6F3E b. Frequency range: 728 - 741 MHz. c. Operating power of transmitter is fixed at the factory at 6 mW. d. Maximum power permitted under Part 74.861(e) (1)(ii) of the rules is 250 milliwatts, and the ESW-T211 complied with those power limitations. e. Function of each active semiconductor device: See Appendix 1. f. Complete circuit diagram is included as a separate exhibit. g. A draft instruction book is included as a separate exhibit. h. The transmitter tune-up procedure is included as a separate exhibit. 2 B. GENERAL INFORMATION REQUIRED (Continued) i. A description of circuits for stabilizing frequency is included in Appendix 2. j. A description of circuits and devices employed for suppression of spurious radiation and for limiting modulation is included in Appendix 3. k. Not applicable. 5. Data for 2.985 through 2.997 follow this section. 6. RF_Power_Output (Paragraph 2.987(a) of the Rules) The device has an integral antenna. Effective radiated power (assuming an ideal dipole) was calculated, using the data of Table 1, as 6 mW. NOTE: All audio measurements were made hard-wired using the normal input connector. C. MODULATION CHARACTERISTICS 1. A curve showing frequency response of the transmitter is shown in Figure 1. Reference level was a 1 kHz au- dio signal at 10 kHz deviation. A Boonton 8220 modula- tion meter was used to measure deviation. Audio output was measured from an Audio Precision System One integrated measurement system. 2. Under Section 74.861 no modulation limiting is required. 3. Occupied_Bandwidth (Paragraphs 2.989(c), and 74.861(6) of the Rules) Figure 2 is a plot of the sideband envelope of the transmitter taken with a Tektronix 494P spectrum analyzer. Modulation consisted of a 16.8 kHz tone, the frequency of maximum response, at an input level 16 dB greater than that necessary to produce 50% modulation. NOTE: Audio bandwidth is 16.8 kHz, and maximum system deviation (0dBm input) is 24 kHz. Using 2D+2F = modulation factor. Where "D" is rated system deviation, and "F" is maximum modulation frequency, an emission designator of 81k6F3E was computed. 3 FIGURE 1 MODULATION FREQUENCY RESPONSE MODULATION FREQUENCY RESPONSE FCC ID: JFZT211 FIGURE 1 4 FIGURE 2 OCCUPIED BANDWIDTH OCCUPIED BANDWIDTH FCC ID: JFZT211 FIGURE 2 5 C. MODULATION CHARACTERISTICS (Continued) The plots are within the limits imposed by paragraph 74.861(6). The horizontal scale (frequency is 50 kHz per division) and the vertical scale (amplitude) is a logarithmic presentation equal to 10 dB per division. D. SPURIOUS EMISSIONS AT THE ANTENNA TERMINALS (Paragraph 2.991 of the Rules) NOT APPLICABLE, INTEGRAL ANTENNA. E. DESCRIPTION OF RADIATED SPURIOUS MEASUREMENT FACILITIES A description of the Hyak Laboratories’ radiation test facility is a matter of record with the FCC. The facility meets ANSI 63.4-1992 and was accepted for radiation measurements from 25 to 1000 MHz on October 1, 1976 and is currently listed as an accepted site. 6 F. FIELD STRENGTH MEASUREMENTS OF SPURIOUS RADIATION Field intensity measurements of radiated spurious emissions from the ESW-T211 were made with a Tektronix 494P spectrum ana- lyzer using Singer DM-105A calibrated dipole antennas below 1 GHz, and Polarad CA-L, and CA-S or EMCO 3115 from 1-8.0 GHz. The transmitter was located in an open field 3 meters from the test antenna. Supply was a set of fresh batteries. The transmitter and test antennas were arranged to maximize pickup. Both vertical and horizontal test antennae polarization were employed. Reference level for the spurious radiation was taken as the carrier level. The transmitter and test antennae were arranged to maximize pickup. Both vertical and horizontal test antenna polarization were employed. The measurement system was capable of detecting signals 95 dB or more below the reference level. Measurements were made from the lowest frequency generated within the unit to 10 times operating frequency. Data after application of antenna factors and line loss corrections are shown in Table 1. 7 TABLE 1 TRANSMITTER CABINET RADIATED SPURIOUS 734.375 MHz, 3 Vdc, 6 mW Spurious dB Below Frequency F.I.@3m Carrier ___MHz__ uV/m Reference 1 734.377 186209 0 1468.750 234 58V* 2203.131 224 58V* 2937.508 168 61H* 3671.885 65 69V* 4406.262 48 72H* 5140.639 71 68H* 5875.016 62 70V* 6609.393 97 66V* 7343.770 135 63H* Required: 43+10Log(P) 21 1 Worst-case polarizati…

Text truncated - open the document above for the full version.

FCC Inquiry Dated 11/7/00 FCC ID: JFZT211 731 Confirmation Number: TC99082 Frequency stability for temperatures down to –30 degrees C as required by Section 2.1055(a)(1): Data follows. 1. Measurement data for modulation limiting as required by Section 2.1047(b): Plot follows. 2. Please accept data based on XX uV/m pending revisions of our test procedures and equipment. Note all spurious were >30 dB below carrier. 3. Please accept data based on XX uV/m pending revisions of our test procedures and equipment. FIGURE 3 AUDIO LIMITER CHARACTERISTICS AUDIO LIMITER CHARACTERISTICS FCC ID: JFZT211 FIGURE 3 5a G. FREQUENCY STABILITY (Paragraph 2.995(2) and 74.861 of the Rules) Measurement of frequency stability versus temperature was made at temperatures from -0 o C to +50 o C. At each temperature, the unit was exposed to test chamber ambient a minimum of 60 minutes after indicated chamber temperature ambient had stabi- lized to within ±2° of the desired test temperature. Following the 1 hour soak at each temperature, the unit was turned on, keyed and frequency measured within 2 minutes. Test temperature was sequenced in the order shown in Table 2, starting with -0°C. A Thermotron S1.2 temperature chamber was used. Temperature was monitored with a Keithley 871 digital temperature probe. The transmitter output stage was terminated in a 50 ohm dummy load. Primary supply was 3 Vdc. Frequency was measured with a HP5385A digital frequency counter connected to the transmitter through a power attenuator. TABLE 3 FREQUENCY STABILITY AS A FUNCTION OF TEMPERATURE 734.375 MHz; 3 Vdc; 6 mW Temperature,_°C Output_Frequency,_MHz -29.2* 734.362776 -20.0* 734.366577 - 9.3* 734.370548 - 0.2 734.372965 9.8 734.374245 19.9 734.374686 29.9 734.374657 39.8 734.374621 50.6 734.375214 Maximum frequency error: 734.362776 734.375000 - 0.012224 MHz FCC Rule 74.861(e)(4) specifies .005% or a maximum of 0.036719 MHz, corresponding to: High Limit 734.411719 MHz Low Limit 734.338281 MHz *Gloves are provided to the user. Rev. 1 9