DLAWM-3210-3220VHF-FM Wireless Microphone

9 Please follow the instructions in this manual to obtain the optimum results from this unit. We also recommend that you keep this manual handy for future reference. WM-3210 WM-3220 UHF WIRELESSMICROPHONE 8. OPERATING INSTRUCTIONS •To prevent the electromagnetic wave from badly influencing medical equipment, make sure to switch off the unit's power when placing it in close proximity to the medical equipment. •When the unit is not in use for 10 days or more, be sure to take the battery out of the unit because battery leakage may cause personal injury or contamination of environment. •Make sure to observe the following handling precautions so that a fire or personal injury does not result from leakage or explosion of the battery. ·Do not short, disassemble, heat nor put the battery into a fire. ·Never charge batteries of the type which are not rechargeable. ·Do not solder a battery directly. ·Be sure to use the specified type of battery. ·Note correct polarity (positive and negative orientation)when inserting a battery in the unit. ·Avoid locations exposed to the direct sunlight, high temperature and high humidity when storing batteries. WARNING WM-3210 WM-3220 UHF WIRELESSMICROPHONE TING INSTRUCTIONS •To prevent the electromagnetic wave from badly influencing medical equipment, make sure to switch off the unit's power when placing it in close proximity to the medical equipment. •When the unit is not in use for 10 days or more, be sure to take the battery out of the unit because battery leakage may cause personal injury or contamination of environment. •Make sure to observe the following handling precautions so that a fire or personal injury does not result from leakage or explosion of the battery. ·Do not short, disassemble, heat nor put the battery into a fire. ·Never charge batteries of the type which are not rechargeable. ·Do not solder a battery directly. ·Be sure to use the specified type of battery. ·Note correct polarity (positive and negative orientation)when inserting a battery in the unit. ·Avoid locations exposed to the direct sunlight, high temperature and high humidity when storing batteries. WARNING WM-3210 WM-3220 UHF WIRELESSMICROPHONE TING INSTRUCTIONS •To prevent the electromagnetic wave from badly influencing medical equipment, make sure to switch off the unit's power when placing it in close proximity to the medical equipment. •When the unit is not in use for 10 days or more, be sure to take the battery out of the unit because battery leakage may cause personal injury or contamination of environment. •Make sure to observe the following handling precautions so that a fire or personal injury does not result from leakage or explosion of the battery. ·Do not short, disassemble, heat nor put the battery into a fire. ·Never charge batteries of the type which are not rechargeable. ·Do not solder a battery directly. ·Be sure to use the specified type of battery. ·Note correct polarity (positive and negative orientation)when inserting a battery in the unit. ·Avoid locations exposed to the direct sunlight, high temperature and high humidity when storing batteries. WARNING WM-3210 WM-3220 UHF WIRELESSMICROPHONE TING INSTRUCTIONS •To prevent the electromagnetic wave from badly influencing medical equipment, make sure to switch off the unit's power when placing it in close proximity to the medical equipment. •When the unit is not in use for 10 days or more, be sure to take the battery out of the unit because battery leakage may cause personal injury or contamination of environment. •Make sure to observe the following handling precautions so that a fire or personal injury does not result from leakage or explosion of the battery. ·Do not short, disassemble, heat nor put the battery into a fire. ·Never charge batteries of the type which are not rechargeable. ·Do not solder a battery directly. ·Be sure to use the specified type of battery. ·Note correct polarity (positive and negative orientation)when inserting a battery in the unit. ·Avoid locations exposed to the direct sunlight, high temperature and high humidity when storing batteries. WARNING 1. SAFETY PRECAUTIONS •Be sure to read the instructions in this section carefully before use. •Make sure to observe the instructions in this manual as the conventions of safety symbols and messages regarded as very important precautions are included. •We also recommend you keep this instruction manual handy for future reference. Safety Symbol and Message Conventions Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards. Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury. Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage. WARNING 1. SAFETY PRECAUTIONS •Be sure to read the instructions in this section carefully before use. •Make sure to observe the instructions in this manual as the conventions of safety symbols and messages regarded as very important precautions are included. •We also recommend you keep this instruction manual handy for future reference. Safety Symbol and Message Conventions Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards. Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury. Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or propert…

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6 6. BLOCK DIAGRAM +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN BIAS SW. CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 16 11 10 19 17 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 11 10 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 11 10 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 11 10 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 11 10 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 11 10 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM102: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 11 10 +B: DC 5V LOOPFIL. CHANNELSET VOLTAGEDETECTORM10: S-80842ANNP SW OFF DETECT MUTE SW. BIAS SW. BAT CHECKER X1:32.768KHz X2: 6.000MHz RESET FREQ. SET DATA POWER ON / OFF SW BATT.6LR61DC9V RFLPF RF AMP. Q7:2SC3356 VCOM7:TB31214FN MIC AMP.M2,: SA575DK TONE OSC.M3: TC4SU69F FREQUENCYSYNTHESIZERM7: TB31214FN Q6:2SA1622 CPUM9: PD750004GB BAT. CHECKERQ2: 2SC4211D2: LED MIC CPU CPU REG. CONT./SW OFF DETECTQ1,3,4: 2SC4211 RF P.A.Q8:2SC3356 VOLTAGE DETECTM13: S-80855ANNP VR2DEV. ADJ. PRE EMPHASISM2: SA575DK COMPRESSERM2:SA575DK L.P.F.Q9:2SC3326 TONE BUFFERM4: TC4SU69F MUTE SW.M101:TC7S66FU PLL LOOP VCO SW.Q5:2SA1622 CPU REGULATORM5: TK11250MTL CPU LOW VOLTAGE DETECT REFERENCE CLOCK OSC EEPROMM11: 24C16 FREQ. DATAWRITE VCO. SW. 2 3 1 45 6 9 13 14 15 11 10 26 24 20 21 22 23 18 2…

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RE: TOA Corp. FCC ID: DLAWM-3210-3220 DLAWM-3310 1.) I disagree with your conclusions about Categorical Exclusion on this Application. All equipment must submit information on RF exposure before a Grant of Equipment Authorization can be issued (see Public Notice DA 00-1950). Providing RF exposure information is critical for complying with Section T of this same document. For additional information I direct you to Kwok Chan or Ray LaForge of the FCC’s Office of Engineering and Technology. Response: I have uploaded a RF safety statement example that will be included in the user manual. FYI: I agree that RF exposure is to be address at all times, but our previous submissions to FCC, they did not request for us to provide a warning statement. I know that FCC wants ALL TCB to follow the same procedure, so we will provide this for consistency. 2.) Radiated power output cannot be performed using a radiated calculation from the measured field strength. The only recognized method is the substitution method as described in TIA/EIA 603. This should be performed for all harmonics and the carrier radiated power. For additional direction on this mater I direct you to Frank Coperich of the FCC’s Office of Engineering and Technology. Response: We did performed substitution method for the Output Power and for harmonics emissions that were not 20-dB below the Radiated limit at 3 meters, the test method is mention on the test report. Below is a response from Frank Coperich, regarding the substitution method, which we have followed: To date we have perform and submitted Harmonic emission compliance using a converted -13 dBm to a field strength limit @ 3 meters (82.2 dBuV/m for EIRP or 84.2 dBuV/m for ERP). Again, is this still the acceptable method or is the substitution now the only preferred test method? Frank Response: FOR CONSISTENCY, WE WANT EVERYONE TO USE THE SUBSTITUTION METHOD. HOWEVER, WHEN THE INITIAL MEASURED FIELD STRENGTH LEVELS OF THE SPURIOUS EMISSIONS ARE MORE THAN 20 DB BELOW THE ABOVE CITED LEVELS, THEN CONTINUATION WITH THE SUBSTITUTION METHOD IS NOT NECESSARY. In regards to power output measurements, due to high power license devices (like 2 watts and higher) some signal generators cannot generate those types of field strength, for a substitution test. This is were we use the field strength, which is then converted to a power level. Is this an acceptable alternative test method? Frank Response: NO, IF YOU ARE ATTEMPTING TO DUPLICATE A FIELD STRENGTH REFERENCE READING THAT IS HIGHER THAN POSSIBLE WITH THE SIGNAL GENERATOR (AND A DIPOLE ANTENNA), THEN YOU MAY RUN THE SIGNAL GENERATOR AT A LOWER LEVEL AND THEN ADD THE DIFFERENCE DB TO THE OUTPUT. FOR EXAMPLE, TO SIMULATE A XX dBuV/M FIELD STRENGTH REFERENCE READING YOU MAY GENERATE A DUPLICATE FIELD STRENGTH OF XX-10 dBuV/M AND THEN ADD 10 DB TO THE SIGNAL GENERATOR OUTPUT TO DETERMINE THE PROPER REPLACEMENT (SUBSTITUTION) LEVEL SIMILARLY, IF THE REPLACEMENT ANTENNA USED WITH THE SIGNAL GENERATOR IS NOT A DIPOLE BUT HAS GAIN, THEN YOU SHOULD ADD THE DB GAIN OF THE ANTENNA (REFERENCED TO A DIPOLE) TO OBTAIN THE PROPER REPLACEMENT (SUBSTITUTION) SIGNAL GENERATOR OUTPUT . 3.) The specification sheet for this equipment indicates a maximum frequency response of 12KHz and a maximum input level of 125 to 130dB SPL (depending on model). Additionally the audio low pass filter as described in the Circuit Explanation indicates a low pass filter with a roll off that begins at 15KHz. It is unusual to see equipment of this type limit it’s peak modulating frequency below 10KHz. Please show that a modulating tone of 12KHz at 125 (or 130) dB SPL the EUT will continue to meet the bandwidth limitations of 90.265(b), 74.861(e)(3) and 74.861(e)(5). Response: Uploaded as requested. 4.) Please show that the sum of all variables; [i.e. max modulating frequency, max input level, max variance across frequency stability] the total emission bandwidth falls within the limit of 90.266(b)(3). Response: Uploaded as requested. 5.) This equipment uses a 32KHz tone to open and close the squelch at the receiver. I will have to check with the Commission to find out if it will affect the emission designator. Response: This information had been submitted to FCC before and they did not have any question or concerns in regards to the squelch receiver input bandwidth. Please refer to FCC ID: DLAWM-4210-4220, DLAWM-4200, and DLAWM-4300- 4310. 6.) The tune up specification does not provide any information for how to set the deviation. Please submit. Response: The deviation is controlled internally by the chip (M/N: PD75004G) pin 14, location M9. Below is the Deviation specification of the chip. Range Designed Figure FCC ----------------------------------------------- 169-174 MHz +/- 15 KHz Part 90 174-216 MHz +/- 40 KHz part 74

Microphone External Microphone Assembly

Microphone Board Top w/o Shield Microphone Board Top with Shield Microphone Boards Bottom Microphone Board Assembled

7 7. CIRCUIT EXPLANATION HOW EACH SECTION WORKS We will explain operations of each section based on block diagrams. (1) MICROPHONE (Block diagram No. 1) An internal microphone is of unidirectional dynamic type. Impedance: 600  Sensitivity: -52 dB (1kHz, 0 dB = 1 V/1 pa) (2) MICROPHONE AMPLIFIER (2) The microphone amplifier uses an OP amp (M2) and amplifies the signal from the microphone capsule to the level necessary for the compressor circuit. (3) COMPRESSOR (3) The compander IC is SA575DK (M2), and has a compressor circuitry and 2 OP amps. The compression ratio is 1/2 (logarithmic compression). (4) PRE-EMPHASIS (4) Pre-emphasis is carried out to improve the system's S/N ratio. Amplifier (M2) is used as an OP amp. A time constant if 50 μsec. (5) LPF (5) The third Butterworth type low-pass filter is constructed using the transistor Q9 to attenuate the audio signal components of over 15 kHz. Also, the harmonic components of the tone signal to be superimposed in the LPF circuit are attenuated by the-pass filter.. (6) MUTE SW (6) Using the analog switch (M14), this circuit mutes both the audio and tone signals during the periods of from the power switch-on to the commencement of signal transmission and from power switch-off to transmission termination to operate the receiver tone squelch. (7) TONE OSC(7, 8) Consists of a quarts oscillator (X1) and an inverter (M3) and oscillates a signal for tone squelch (tone signal). The oscillation frequency is 32.768 kHz, and the output signal is taken out through a buffer (M4). (8) PLL FREQUENCY SYNTHESIZER (9, 10, 11) VCO , PLL IC (M7) and LOOP FILTER make up a phase locked loop. The VCO oscillates the transmission frequency directly and divides the output. It then compares the frequency phase by means of the 25 kHz comparison frequency, and outputs a pulse corresponding to the phase difference. The pulse is applied to the VCO as a control voltage after integrated at a loop filter, and then is locked to the set transmission frequency. Both the audio and tone signals are input from the VCO's modulation circuit, and then are frequency-modulated. The modulation method is a reactance modulation system using a variable capacitance diode. And crystal-controlled reference oscillator is 6.0 MHz in frequency,and is oscillated by the PLL IC's internal inverter to operate the PLL as a clock. At the same time, the 6 MHz signal is supplied to the CPU as the CPU reference oscillation frequency. (9) RF AMP, RF POWER AMP (13, 14) By amplifying the VCO's oscillation output with a transistor, these amplifiers not only make up for losses in a pad or RF LPF, but also gain the antenna power. The two-stage construction method is employed for the amplifiers to obtain sufficient buffer effects for the VCO, and a 6 dB pad is installed in the amplifier input. The output is less than 50 mW. (10) BIAS REGULATOR, BIAS SWITCH (15) When the VCO's transmission frequency becomes stable after PLL lockup completion, the switch (Q6) turns on and the bias is applied for radio signal transmission. (11) RF LPF (12,16)  Low-pass filters are used for the RF section's band limiting filter to suppress the spurious- 8 radiated signals with frequencies much different from the transmission frequency. (12) CPU and its peripheral parts (17,18,19) This section is comprised of the CPU (M9), voltage detector (M10) . After its power switch is set to the ON position, the CPU controls the transmission frequency setting, the start of transmission, actions till voice transmission, and actions when the system is switched off. The operating procedures are stored in the CPU's mask ROM, and the control contents are as follows: (A) The CPU reads transmission frequency setting data from both theChannel setting switches, and transmits data to PLL IC for the division ratio setting. (B) The CPU controls the bias circuitry and Q6 so that the radio signal is not transmitted until the transmission frequency becomes stable. (C) The CPU controls MUTE SW, VCO SW, BIAS SW, and BATT.CHECKER. When the circuit voltage drops below 4.2 V, the voltage detector transmits a reset signal to the CPU to stop the CPU's operation so that no radio signal is transmitted. (13) REG.CONT/SW OFF DETECT (20,21,26) Setting the power switch to the ON position turns on Q3, and adds the control voltage to a regulator (M5) for its operation. As a result, the voltage of 5 VDC is supplied to each circuit all circuits begin to operate. If the power switch is set to the OFF position, both Q1 and Q4 transmit the SW OFF DETECT signal to the CPU and the tone signal is muted (M14) to enable the receiver's tone squelch. Both Q5 and Q6 then turn off, and the radio signal transmission stops. During this process, M5 continues to operate according to time constants of both C30 and R31. One second after the signal transmission stops, when R31's terminal voltage becomes lower than M5's operating voltage, M5 and all other circuits stop their operations. (14) BATT.CHECKER (22,23,24) Informs the battery consumption by means of a lamp (D2). Although the lamp lights bright when the battery is new, it becomes darker as the battery voltage drops. When the voltage drops below 6 V, M13 transmits a signal to the CPU and causes the lamp to flash bright, indicating the battery needs to be replaced. (15) Frequency registration (25) Transmission frequencies and their channels are written in the EEPROM (M11), and the contents can be changed as required.

TOA RADIO MICROPHONE model WM-3210 Preliminary Information Take care when handling this document. Please do not show this document to any third party. CONTENTS 1.GENERAL DESCRIPTION............................................................................2 2.FEATURES.........................................................................................................2 3.SPECIFICATIONS............................................................................................2 4.TEST CONDITIONS.........................................................................................2 5.APPEARANCE ..................................................................................................5 6.BLOCK DIAGRAM...........................................................................................6 7.CIRCUIT EXPLANATION...............................................................................7 8. OPERATING INSTRUCTIONS .................................................................... 9 2 1. GENERAL DESCRIPTION The TOA wireless microphone WM-3210 is of hand-held type and is designed to conform with the regulations. It employs an optimized PLL-synthesizer and a compander noise reduction circuit to minimize the influence of ambient RF noise. 2. FEATURES (1) Up to 6 operating frequencies are made available for selection. (2) An optimized PLL-synthesizer minimizes the oscillation frequency drift resulting from the ambient temperature or voltage fluctuation. (3) Battery lamp indicates battery consumption to prevent the unit from malfunctioning when the battery level remarkably decreases. (4) The compressor and low-pass filter on the audio circuit protect the unit against out-of-band energy produced by overload. (5) Chip components make the unit smaller in size yet more reliable. (6) 6 frequencies of 169 - 216 MHz 3. SPECIFICATIONS Model No.WM-3210 OscillatorCrystal-contorolled PLL-synthesizer Nominal Frequency6 frequencies of 169 - 216 MHz RF Power OutputLess than 50mW Modulation Frequency Modulation Nominal Supply Voltage9.0V Usable Battery6LR61(9.0V Alkaline) Marginal Battery Voltage LevelApprox. 6 V (When the battery voltage falls below this level, the battery lamp begins to flash.) Antenna 4. TEST CONDITIONS (1) Modulation and Non-modulation [Modulation] First remove the windscreen and then the microphone capsule having a 3-pin connector. Connect the same 3- pin connector from the jig (shown below) attached to the microphone sample to the resultant connector inside the microphone. Then, connect the jig output to an AF oscillator using the shielded or coaxial cable. For connection, refer to the figure below. NOTE. Pin #1: Ground, Pin #2: Ground, Pin #3: Input (HOT) 2 1. GENERAL DESCRIPTION The TOA wireless microphone WM-3210 is of hand-held type and is designed to conform with the regulations. It employs an optimized PLL-synthesizer and a compander noise reduction circuit to minimize the influence of ambient RF noise. 2. FEATURES (1) Up to 6 operating frequencies are made available for selection. (2) An optimized PLL-synthesizer minimizes the oscillation frequency drift resulting from the ambient temperature or voltage fluctuation. (3) Battery lamp indicates battery consumption to prevent the unit from malfunctioning when the battery level remarkably decreases. (4) The compressor and low-pass filter on the audio circuit protect the unit against out-of-band energy produced by overload. (5) Chip components make the unit smaller in size yet more reliable. (6) 6 frequencies of 169 - 216 MHz 3. SPECIFICATIONS Model No.WM-3210 OscillatorCrystal-contorolled PLL-synthesizer Nominal Frequency6 frequencies of 169 - 216 MHz RF Power OutputLess than 50mW Modulation Frequency Modulation Nominal Supply Voltage9.0V Usable Battery6LR61(9.0V Alkaline) Marginal Battery Voltage LevelApprox. 6 V (When the battery voltage falls below this level, the battery lamp begins to flash.) Antenna 4. TEST CONDITIONS (1) Modulation and Non-modulation [Modulation] First remove the windscreen and then the microphone capsule having a 3-pin connector. Connect the same 3- pin connector from the jig (shown below) attached to the microphone sample to the resultant connector inside the microphone. Then, connect the jig output to an AF oscillator using the shielded or coaxial cable. For connection, refer to the figure below. NOTE. Pin #1: Ground, Pin #2: Ground, Pin #3: Input (HOT) 2 1. GENERAL DESCRIPTION The TOA wireless microphone WM-3210 is of hand-held type and is designed to conform with the regulations. It employs an optimized PLL-synthesizer and a compander noise reduction circuit to minimize the influence of ambient RF noise. 2. FEATURES (1) Up to 6 operating frequencies are made available for selection. (2) An optimized PLL-synthesizer minimizes the oscillation frequency drift resulting from the ambient temperature or voltage fluctuation. (3) Battery lamp indicates battery consumption to prevent the unit from malfunctioning when the battery level remarkably decreases. (4) The compressor and low-pass filter on the audio circuit protect the unit against out-of-band energy produced by overload. (5) Chip components make the unit smaller in size yet more reliable. (6) 6 frequencies of 169 - 216 MHz 3. SPECIFICATIONS Model No.WM-3210 OscillatorCrystal-contorolled PLL-synthesizer Nominal Frequency6 frequencies of 169 - 216 MHz RF Power OutputLess than 50mW Modulation Frequency Modulation Nominal Supply Voltage9.0V Usable Battery6LR61(9.0V Alkaline) Marginal Battery Voltage LevelApprox. 6 V (When the battery voltage falls below this level, the battery lamp begins to flash.) Antenna 4. TEST CONDITIONS (1) Modulation and Non-modulation [Modulation] First remove the windscreen and then the microphone capsule having a 3-pin connector. Connect the same 3- pin connector from the jig (shown below) attached to the microphone sample to the resultant connector inside the microphone. Then, connect the jig output to an AF os…

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TOA RADIO MICROPHONE model WM-3210 Preliminary Information Take care when handling this document. Please do not show this document to any third party. CONTENTS 1.GENERAL DESCRIPTION............................................................................2 2.FEATURES.........................................................................................................2 3.SPECIFICATIONS............................................................................................2 4.TEST CONDITIONS.........................................................................................2 5.APPEARANCE ..................................................................................................5 6.BLOCK DIAGRAM...........................................................................................6 7.CIRCUIT EXPLANATION...............................................................................7 8. OPERATING INSTRUCTIONS .................................................................... 9 2 1. GENERAL DESCRIPTION The TOA wireless microphone WM-3210 is of hand-held type and is designed to conform with the regulations. It employs an optimized PLL-synthesizer and a compander noise reduction circuit to minimize the influence of ambient RF noise. 2. FEATURES (1) Up to 6 operating frequencies are made available for selection. (2) An optimized PLL-synthesizer minimizes the oscillation frequency drift resulting from the ambient temperature or voltage fluctuation. (3) Battery lamp indicates battery consumption to prevent the un…

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