Comtek Communications Technology M216 Wireless Microphone Transmitter User Manual C 216rpt exhibitpages wpd

Comtek Communications Technology Inc Wireless Microphone Transmitter C 216rpt exhibitpages wpd

Operations Manual

M-216 OPERATOR’S MANUAL357 West 2700 South • Salt Lake City, Utah 84115 • Phone: (800) 496-3463 • Fax: (801) 484-6906 • http://www.comtek.comM-216WirelessMicrophoneTransmitter
INTRODUCTIONPage 1The M-216 wireless microphonetransmitter offers the ultimateperformance and versatility for assistivelistening, language interpretation,tour guide presentations, personalcueing, and for other personal remotetransmission situations.The M-216 incorporates the latest digitaland analog technologies to produce lowresidual noise, wide dynamic range,and extended frequency responserendering the most natural soundpossible from a wireless microphone.The transmitter’s microcontrollerautomatically sets the modulation deviation,companding or non-companding audioprocessing, and the EQ when correspondingchannels are selected. Because of thiscomprehensive feature, thisversatile transmitter can transmiton 19 high fidelity channels and38 standard channels insuringcompatibility with receiversconforming to regulationsregarding Low Power Radio Service(LRPS) transmissions in the 216-217 MHz bandunder Part 95 of the F.C.C. regulations.M-216WirelessMicrophoneTransmitter
Setupa. Check to insure that the M-216 transmitter’s radio frequency channel isthe same as the associated COMTEK receiver’s channel. (Channels areindicated by the 99 position rotary channel selector switches on the back ofthe transmitter: see page 3.)b. Open the battery door cover on the transmitter (see page 4) andinsert a new nine volt alkaline battery (Eveready E522 or equivalent). Thistype of battery will offer up to 40 hours of operation. Replace the battery beforeevery use if the demand for fail-safe operation outweighs battery cost. The use ofcarbon batteries is not recommended.NOTE: If a rechargeable battery is to be used, insure that it has beenallowed to charge at least twelve hours to bring it to full charge (see page 7for battery charger instructions).c. Connect the microphone to the transmitter by inserting the microphoneplug into the receptacle on the top of the transmitter. The transmitter isoperating when the transmitter power switch is turned on and the batterystatus/on indicator illuminates.NOTE: The 36-inch microphone cord also functions as part of thetransmitter’s antenna system. For optimum performance, this cordshould be fully extended. Coiling or bunching the microphonecord may reduce the range of the transmitter. The transmittershould be carried by the snap-on belt clip (included) or in a pocketor belt clip pouch.d. In a situation where an extremely loud voice or a very soft voice is used, itis necessary to adjust the audio input gain control while observing the audio“voice” level modulation indicator. A full bright LED indicates full audiocompression at 100% modulation. For best performance, the audio inputgain should be adjusted for some low level LED luminescence duringnormal audio levels with occasional full bright peaks indicating 100%modulation.M-216 OPERATING INSTRUCTIONSPage 2
Page 3Frequency Selection (216-217 MHz)The M-216 transmitter can operate on one of 57 available channels between216 MHz and 217 MHz. COMTEK’s channel designations indicate bothstandard narrow-band channels and high fidelity wide-band compandedchannels. Channels 1-40 are narrow-band channels (5 kHz deviation)offering compatibility with other manufacturers’ receivers such as thePhonak MicroEar. Channels 41-60 are high fidelity wide-band compandedchannels (10 kHz deviation) for use with COMTEK transmitters. COMTEKtransmitters automatically transmit the proper modulation when set tochannels 1-40 for narrow-band or 41-60 for wide-band companded channels.After you have determined the channel on whichyou are going to operate, position the two rotaryswitches to indicate the channel. The left rotaryswitch is for tens and the right rotary switch isfor ones. To select channel 41 (216.0250 MHz),position the left rotary switch to point to 4 (X10),and position the right rotary switch to point to 1 (X1).Refer to frequency charts on pages 9 and 10 for selectable frequencies.Multiple Channel OperationWhen multiple transmitters are broadcasting in the same immediate area(within 100 feet), the RF signals will “mix” together generating additionalsignals. If these product frequencies are too close to a frequency which you areusing, you will experience intermodulation interference. This condition iscommon to all radio receivers to some extent.Simultaneous operation of more than three channels requires frequencycoordination to avoid intermodulation interference, which could result inpoor or unusable performance.To avoid this type of interference, you should select frequencies from one of thestandard groups (see frequency group charts on page 10), or use COMTEK’sfrequency selection software (www.comtek.com/software.htm) to determineappropriate frequencies or contact COMTEK to obtain a free copy.M-216 OPERATING INSTRUCTIONS
Low Battery IndicatorThe LED on the top of the transmitterindicates the status of the battery aswell as indicating that the unit is turnedon. When turned on, the LED illuminates.If the battery is low the green LED willblink rapidly to warn you that the batterywill soon be dead. Replace a low batteryimmediately.Battery Removal / ReplacementM-216 OPERATING INSTRUCTIONSPage 4Pull back battery door latch and allowbattery cover door to spring open. Toremove battery, simply manipulate thebottom of battery out of the compartmentand remove.To insert battery, facebattery with negative terminalin line with large hole in batterycompartment, press battery intocompartment and close battery door untilit snaps shut. Note: It is not possible to putbattery in backwards.Battery indicator LED
Page 5M-216 OPERATING INSTRUCTIONSAuxiliary Audio Input OperationThe M-216 transmitter may transmit from avariety of audio sources such as tape and C.D.players, TV and VCR’s, or any audio devicehaving an auxiliary or line level audio output.The auxiliary input cable supplied with theM-216 transmitter (CB-36 ST) will operatewith any device having a mini 3.5 mmjack, stereo or mono, and with line level orearphone level output.To accommodate a variety of specialtyapplications, auxiliary input cableswith RCA phono plug, 1/4” audiophone plug, and XLR connectors areavailable from COMTEK.Setupa. Plug the micro-miniscrew lock whip antennainto the top center jack(mic/ant.) of the M-216transmitter. The whipantenna should be in avertical position away fromany metallic objects to insuremaximum range performance.b. Connect the proper auxiliary input cable to theaudio source. Connect the right-angle mini plug end of theauxiliary input cable in the “AUX” input jack of the M-216 transmitter.Note: Check to insure that the audio source is a line level, earphone level,or fixed AUX level output.(continued)
Page 6Belt clip installationM-216 SNAP-ON BELT CLIP (Included)Belt clip removalc. Turn on the transmitter with program from the audio source being fed tothe transmitter. Observe the audio “voice” level modulation indicator. A fullbright LED indicates full audio compression at 100% modulation. For bestperformance, the audio input gain should be adjusted for some low levelLED luminescence during normal audio levels with occasional full brightpeaks indicating 100% modulation.d. When using the auxiliary audio input with the microphone plugged intothe transmitter, priority should be given to the microphone gain adjustment.The mixing balance between the auxiliary audio and the microphone shouldbe made with the volume control of the auxiliary audio source.Note: The optional microphone mute switch only affects the microphone. It does not affect the auxiliary audio input.M-216 OPERATING INSTRUCTIONS
Page 7Battery Charge To charge the M-216 with the NBC 9-2C charger:1. Make sure that a Ni-MH rechargeable battery is used. (Alkaline batteries must not be charged with the NBC 9-2C charger.)2. Make sure the M-216 is turned OFF.3. Note that the red charging indicator on the NBC 9-2C should turn on when the charger output cord is plugged into the microphone input receptacle on the transmitter.4. Allow the battery to charge for 12 hours for 12 hours of operation when Ni-MH battery is used. Note that immediately after charging, the battery will be warm. This is normal and not cause for alarm.5. On stored COMTEK units periodically open the battery compartment to check for battery leakage. If a battery is leaking, it must be discarded, and the battery compartment must be cleaned or returned to COMTEK’s service department for repairs.IMPORTANTM-216 OPERATING INSTRUCTIONS
M-216 CONTROLSn COMPAND AUTO / OFF SWITCH: This switch overridesthe automatic selection of the companded channels tonon-companded operation.o CHANNEL SWITCHES: These rotary switchesare set to the same channel as the transmitter.Actual frequency of operation must agree withthe transmitter.(See page 10 for frequency selection chart.)p BATTERY COMPARTMENT: Thebattery compartment features a hingedbattery cover and an alignment system thatinsures proper battery polarity. Batteryinstallation and removal is facilitated by simplymanipulating the bottom of the battery.q AUXILIARY AUDIO INPUT JACK:Allows transmitter to use line level, earphonelevel, or fixed AUX as an audio source.r AUDIO “VOICE” MODULATION INDICATOR:This indicator is used in making adjustment with theAudio Input Gain Control.s MIC / ANTENNA JACK: This jack accepts anelectret type microphone having a 36” long cord witha micro-mini 2.5mm mono plug. This jack is also usedfor the R.F. output for the screw-in whip antenna whenthe auxiliary audio input is used.t POWER / BATTERY STATUS INDICATOR: This LED indicator will illuminatecontinuously when the unit is on, indicating normal operation. When the battery voltagedrops below 6 volts, the LED will flash rapidly, indicating that a new battery is needed.u OPTIONAL MIC MUTE SWITCH: This switch turns off the microphone withoutturning off the transmitter carrier.v AUDIO INPUT GAIN CONTROL: This is a microphone and AUX level input gaincontrol. This control is used with the “Voice” modulation indicator.w ON / OFF SWITCH: This switch turns the transmitter on and off.Page 8
216.0125 MHz216.0375 MHz216.0625 MHz216.0875 MHz216.1125 MHz216.1375 MHz216.1625 MHz216.1875 MHz216.2125 MHz216.2375 MHz216.2625 MHz216.2875 MHz216.3125 MHz216.3375 MHz216.3625 MHz216.3875 MHz216.4125 MHz216.4375 MHz216.5125 MHz216.5375 MHz216.5625 MHz216.5875 MHz216.6125 MHz216.6375 MHz216.6625 MHz216.6875 MHz216.7125 MHz216.7375 MHz12345678910111213141516171821222324252627282930216.7625 MHz216.7875 MHz216.8125 MHz216.8375 MHz216.8625 MHz216.8875 MHz216.9125 MHz216.9375 MHz216.9625 MHz216.9875 MHz216.0250 MHz216.0750 MHz216.1250 MHz216.1750 MHz216.2250 MHz216.2750 MHz216.3250 MHz216.3750 MHz216.4250 MHz216.5250 MHz216.5750 MHz216.6250 MHz216.6750 MHz216.7250 MHz216.7750 MHz216.8250 MHz216.8750 MHz216.9250 MHz216.9750 MHzPage 9M-216 FREQUENCY CHARTCHANNEL FREQUENCY3132333435363738394041424344454647484951525354555657585960CHANNEL FREQUENCYWIDE-BAND CHANNELSFor use with COMTEK PR-216 receiversNARROW-BAND CHANNELSFor use with COMTEK PR-216 Receiveror with Phonak microEar5 kHz DEVIATION
Page 10CHANNEL FREQUENCY18122634216.0125 MHz216.1875 MHz216.2875 MHz216.6375 MHz216.8375 MHzGROUP A216 MHzWIDE-BANDFREQUENCY GROUPSFor COMTEK PR-21610 kHz deviationM-216M-216216 MHzNARROW-BANDFREQUENCY GROUPSFor use with COMTEK PR-216 receiveror with Phonak microEar 5 kHz deviationCHANNEL FREQUENCY410142836216.0875 MHz216.2375 MHz216.3375 MHz216.6875 MHz216.8875 MHzGROUP BCHANNEL FREQUENCY612163038216.1375 MHz216.2875 MHz216.3875 MHz216.7375 MHz216.9375 MHzGROUP CCHANNEL FREQUENCY814183240216.1875 MHz216.3375 MHz216.4375 MHz216.7875 MHz216.9875 MHzGROUP DCHANNEL FREQUENCY4144465357216.0250 MHz216.1750 MHz216.2750 MHz216.6250 MHz216.8250 MHzGROUP 1CHANNEL FREQUENCY4245475458216.0750 MHz216.2250 MHz216.3250 MHz216.6750 MHz216.8750 MHzGROUP 2CHANNEL FREQUENCY4346485559216.1250 MHz216.2750 MHz216.3750 MHz216.7250 MHz216.9250 MHzGROUP 3CHANNEL FREQUENCY4447495660216.1750 MHz216.3250 MHz216.4250 MHz216.7750 MHz216.9750 MHzGROUP 4
Page 11Optional Accessories1. NBC 9-2C Battery charger2. NH9-150 Rechargeable batteries3. P1 Universal pouch4. BC-216 Snap-on belt clip(supplied with M-216)5. LW-216 Whip antenna(supplied with M-216)6. PSC-HM Head wornunidirectional electretmicrophone7. SM-185 Unidirectionalelectret condensermicrophoneAuxiliary Audio Input Cords8. CB-36 STM Stereo mini 3.5mm(supplied with M-216)9. CB-36 RCA Phono plug(optional)10. CB-36 ST1/4 Stereo 1/4”(optional)11. CB-36 XLR XLR-F 3 pin connector(optional)M-216 OPTIONAL ACCESSORIES
M-216 SPECIFICATIONSPage 12Audio Input:• Microphone input impedance for electret type microphone - 3000 ohm• Aux/Line input impedance - 10 k ohm at 0 dB nominalConnectors:Microphone - Micro-mini mono 2.5mmAuxiliary - Mini stereo 3.5mmAudio: Tip and sleeveBattery Charging: Tip and sleeveControls and Indicators:• Synthesized channel selection switches• Power On/Off switch• Optional microphone muting switch• Audio input gain control• Power/Battery status indicator• Audio (voice level) modulation indicator• Companded auto/off switchFrequency Response:80 Hz to 10 kHzAudio Distortion:Less than 1% at 80% modulationModulation Limiter:Soft compressor with 30 dB linear overloadprotection, attack time - less than 1 ms,recovery time - 10 msModulation:• 5 kHz deviation Ch. 1-40 (non-companded)• 10 kHz deviation Ch. 41-60 (companded)Operating Radio Frequency:ity: 57 synthesized channels in the 216-217 MHz LPRS band under F.C.C. part 95Out of Band Emissions:Better than 45 dB below carrierR.F. Stability:20 ppm XTL controlledDigitally synthesizedRF Power Output:10 mW to antenna systemAntenna System:Body worn microphone cord, orloaded whip plugged directlyinto microphone connector whenauxiliary input is usedCurrent Drain:13 mA constant currentBattery:• 9 volt alkaline Eveready 522 or equivalent for up to 40 hours of operation• 9 volt Nickel-Metal Hydride rechargeable battery for up to 12 hours of operationDimensions:1 1/16" x 2 1/4" x 3 1/2 "(27 mm x 57 mm x 89 mm)Weight:5 ounces (140 grams)F.C.C. Compliance:Certification under Part 95NOTE: Specifications subject to change without notice or obligation
357 West 2700 South • Salt Lake City, Utah 84115Phone: (800) 496-3463 • Fax: (801) 484-6906Web Page: http://www.comtek.comM-216 WARRANTY AND SERVICEWarrantyCOMTEK warrants this product to be free from defects in workmanship andmaterial under normal use and conditions for a period of one year from dateof original purchase. Items such as batteries, neckloops, and cords are notcovered by the warranty. Damage due to misuse, ill treatment andunauthorized modification and repairs are not covered by this warranty. COMTEK isnot liable for consequential damages arising out of any failureof the equipment to perform as intended. COMTEK shall bear no responsibility orobligation with respect to the manner of use of any equipment sold by it.COMTEK SPECIFICALLY DISCLAIMS AND NEGATES ANY WARRANTY OFMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSEOF SUCH EQUIPMENT INCLUDING, WITHOUT LIMITATION, ANYWARRANTY THAT THE USE OF SUCH EQUIPMENT FOR ANY PURPOSEWILL COMPLY WITH APPLICABLE LAWS AND REGULATIONS.Service PoliciesWarranty repairs must be done by COMTEK. Only factory technicians areauthorized to perform warranty service on the M-216 transmitter. Beforereturning the M-216 for service, a Return Authorization Number shouldbe obtained from the service department by calling 1-800-496-3463 or1-801-466-3463. Return the unit to the factory with the original or comparable packing.COMTEK will pay for insurance and ground return shipping costs in the United Statesfor all warranty service.
357 West 2700 South • Salt Lake City, Utah 84115 • Phone: (800) 496-3463 • Fax: (801) 484-6906 • http://www.comtek.com

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