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 MANUAL M-216 Wireless Microphone Transmitter 357 West 2700 South • Salt Lake City, Utah 84115 • Phone: (800) 496-3463 • Fax: (801) 484-6906 • http://www.comtek.com INTRODUCTION M-216 Wireless Microphone Transmitter he M-216 wireless microphone transmitter offers the ultimate performance and versatility for assistive listening, language interpretation, tour guide presentations, personal cueing, and for other personal remote transmission situations. The M-216 incorporates the latest digital and analog technologies to produce low residual noise, wide dynamic range, and extended frequency response rendering the most natural sound possible from a wireless microphone. The transmitter’s microcontroller automatically sets the modulation deviation, companding or non-companding audio processing, and the EQ when corresponding channels are selected. Because of this comprehensive feature, this versatile transmitter can transmit on 19 high fidelity channels and 38 standard channels insuring compatibility with receivers conforming to regulations regarding Low Power Radio Service (LRPS) transmissions in the 216-217 MHz band under Part 95 of the F.C.C. regulations. Page 1 M-216 OPERATING INSTRUCTIONS Setup a. Check to insure that the M-216 transmitter’s radio frequency channel is the same as the associated COMTEK receiver’s channel. (Channels are indicated by the 99 position rotary channel selector switches on the back of the transmitter: see page 3.) b. Open the battery door cover on the transmitter (see page 4) and insert a new nine volt alkaline battery (Eveready E522 or equivalent). This type of battery will offer up to 40 hours of operation. Replace the battery before every use if the demand for fail-safe operation outweighs battery cost. The use of carbon batteries is not recommended. NOTE: If a rechargeable battery is to be used, insure that it has been allowed to charge at least twelve hours to bring it to full charge (see page 7 for battery charger instructions). c. Connect the microphone to the transmitter by inserting the microphone plug into the receptacle on the top of the transmitter. The transmitter is operating when the transmitter power switch is turned on and the battery status/on indicator illuminates. NOTE: The 36-inch microphone cord also functions as part of the transmitter’s antenna system. For optimum performance, this cord should be fully extended. Coiling or bunching the microphone cord may reduce the range of the transmitter. The transmitter should be carried by the snap-on belt clip (included) or in a pocket or belt clip pouch. d. In a situation where an extremely loud voice or a very soft voice is used, it is necessary to adjust the audio input gain control while observing the audio “voice” level modulation indicator. A full bright LED indicates full audio compression at 100% modulation. For best performance, the audio input gain should be adjusted for some low level LED luminescence during normal audio levels with occasional full bright peaks indicating 100% modulation. Page 2 M-216 OPERATING INSTRUCTIONS Frequency Selection (216-217 MHz) The M-216 transmitter can operate on one of 57 available channels between 216 MHz and 217 MHz. COMTEK’s channel designations indicate both standard narrow-band channels and high fidelity wide-band companded channels. Channels 1-40 are narrow-band channels (5 kHz deviation) offering compatibility with other manufacturers’ receivers such as the Phonak MicroEar. Channels 41-60 are high fidelity wide-band companded channels (10 kHz deviation) for use with COMTEK transmitters. COMTEK transmitters automatically transmit the proper modulation when set to channels 1-40 for narrow-band or 41-60 for wide-band companded channels. After you have determined the channel on which you are going to operate, position the two rotary switches to indicate the channel. The left rotary switch is for tens and the right rotary switch is for 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 Operation When multiple transmitters are broadcasting in the same immediate area (within 100 feet), the RF signals will “mix” together generating additional signals. If these product frequencies are too close to a frequency which you are using, you will experience intermodulation interference. This condition is common to all radio receivers to some extent. Simultaneous operation of more than three channels requires frequency coordination to avoid intermodulation interference, which could result in poor or unusable performance. To avoid this type of interference, you should select frequencies from one of the standard groups (see frequency group charts on page 10), or use COMTEK’s frequency selection software (www.comtek.com/software.htm) to determine appropriate frequencies or contact COMTEK to obtain a free copy. Page 3 M-216 OPERATING INSTRUCTIONS Low Battery Indicator The LED on the top of the transmitter indicates the status of the battery as well as indicating that the unit is turned on. When turned on, the LED illuminates. If the battery is low the green LED will blink rapidly to warn you that the battery will soon be dead. Replace a low battery immediately. Battery indicator LED Battery Removal / Replacement Pull back battery door latch and allow battery cover door to spring open. To remove battery, simply manipulate the bottom of battery out of the compartment and remove. To insert battery, face battery with negative terminal in line with large hole in battery compartment, press battery into compartment and close battery door until it snaps shut. Note: It is not possible to put battery in backwards. Page 4 M-216 OPERATING INSTRUCTIONS Auxiliary Audio Input Operation The M-216 transmitter may transmit from a variety of audio sources such as tape and C.D. players, TV and VCR’s, or any audio device having an auxiliary or line level audio output. The auxiliary input cable supplied with the M-216 transmitter (CB-36 ST) will operate with any device having a mini 3.5 mm jack, stereo or mono, and with line level or earphone level output. To accommodate a variety of specialty applications, auxiliary input cables with RCA phono plug, 1/4” audio phone plug, and XLR connectors are available from COMTEK. Setup a. Plug the micro-mini screw lock whip antenna into the top center jack (mic/ant.) of the M-216 transmitter. The whip antenna should be in a vertical position away from any metallic objects to insure maximum range performance. b. Connect the proper auxiliary input cable to the audio source. Connect the right-angle mini plug end of the auxiliary 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 5 M-216 OPERATING INSTRUCTIONS c. Turn on the transmitter with program from the audio source being fed to the transmitter. Observe the audio “voice” level modulation indicator. A full bright LED indicates full audio compression at 100% modulation. For best performance, the audio input gain should be adjusted for some low level LED luminescence during normal audio levels with occasional full bright peaks indicating 100% modulation. d. When using the auxiliary audio input with the microphone plugged into the transmitter, priority should be given to the microphone gain adjustment. The mixing balance between the auxiliary audio and the microphone should be 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 SNAP-ON BELT CLIP (Included) Belt clip installation Belt clip removal Page 6 M-216 OPERATING INSTRUCTIONS Battery Charge To charge the M-216 with the NBC 9-2C charger: TANT IMPOR 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. Page 7 M-216 CONTROLS n COMPAND AUTO / OFF SWITCH: This switch overrides the automatic selection of the companded channels to non-companded operation. o CHANNEL SWITCHES: These rotary switches are set to the same channel as the transmitter. Actual frequency of operation must agree with the transmitter. (See page 10 for frequency selection chart.) p BATTERY COMPARTMENT: The battery compartment features a hinged battery cover and an alignment system that insures proper battery polarity. Battery installation and removal is facilitated by simply manipulating the bottom of the battery. q AUXILIARY AUDIO INPUT JACK: Allows transmitter to use line level, earphone level, or fixed AUX as an audio source. r AUDIO “VOICE” MODULATION INDICATOR: This indicator is used in making adjustment with the Audio Input Gain Control. s MIC / ANTENNA JACK: This jack accepts an electret type microphone having a 36” long cord with a micro-mini 2.5mm mono plug. This jack is also used for the R.F. output for the screw-in whip antenna when the auxiliary audio input is used. t POWER / BATTERY STATUS INDICATOR: This LED indicator will illuminate continuously when the unit is on, indicating normal operation. When the battery voltage drops 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 without turning off the transmitter carrier. v AUDIO INPUT GAIN CONTROL: This is a microphone and AUX level input gain control. This control is used with the “Voice” modulation indicator. w ON / OFF SWITCH: This switch turns the transmitter on and off. Page 8 M-216 FREQUENCY CHART CHANNEL FREQUENCY NARROW-BAND CHANNELS For use with COMTEK PR-216 Receiver or with Phonak microEar 5 kHz DEVIATION CHANNEL FREQUENCY 31 216.7625 MHz 32 216.7875 MHz 216.0125 MHz 33 216.8125 MHz 216.0375 MHz 34 216.8375 MHz 216.0625 MHz 35 216.8625 MHz 216.0875 MHz 36 216.8875 MHz 216.1125 MHz 37 216.9125 MHz 216.1375 MHz 38 216.9375 MHz 216.1625 MHz 39 216.9625 MHz 216.1875 MHz 40 216.9875 MHz WIDE-BAND CHANNELS For use with COMTEK PR-216 receivers 216.2125 MHz 10 216.2375 MHz 41 216.0250 MHz 11 216.2625 MHz 42 216.0750 MHz 12 216.2875 MHz 43 216.1250 MHz 13 216.3125 MHz 44 216.1750 MHz 14 216.3375 MHz 45 216.2250 MHz 15 216.3625 MHz 46 216.2750 MHz 16 216.3875 MHz 47 216.3250 MHz 17 216.4125 MHz 48 216.3750 MHz 18 216.4375 MHz 49 216.4250 MHz 21 216.5125 MHz 51 216.5250 MHz 22 216.5375 MHz 52 216.5750 MHz 23 216.5625 MHz 53 216.6250 MHz 24 216.5875 MHz 54 216.6750 MHz 25 216.6125 MHz 55 216.7250 MHz 26 216.6375 MHz 56 216.7750 MHz 27 216.6625 MHz 57 216.8250 MHz 28 216.6875 MHz 58 216.8750 MHz 29 216.7125 MHz 59 216.9250 MHz 30 216.7375 MHz 60 216.9750 MHz Page 9 M-216 M-216 216 MHz NARROW-BAND FREQUENCY GROUPS 216 MHz WIDE-BAND FREQUENCY GROUPS For use with COMTEK PR-216 receiver or with Phonak microEar 5 kHz deviation For COMTEK PR-216 10 kHz deviation GROUP A GROUP 1 CHANNEL FREQUENCY CHANNEL FREQUENCY 12 26 34 216.0125 MHz 216.1875 MHz 216.2875 MHz 216.6375 MHz 216.8375 MHz 41 44 46 53 57 216.0250 MHz 216.1750 MHz 216.2750 MHz 216.6250 MHz 216.8250 MHz GROUP B GROUP 2 CHANNEL FREQUENCY CHANNEL FREQUENCY 10 14 28 36 216.0875 MHz 216.2375 MHz 216.3375 MHz 216.6875 MHz 216.8875 MHz 42 45 47 54 58 216.0750 MHz 216.2250 MHz 216.3250 MHz 216.6750 MHz 216.8750 MHz GROUP C CHANNEL GROUP 3 FREQUENCY CHANNEL 216.1375 MHz 216.2875 MHz 216.3875 MHz 216.7375 MHz 216.9375 MHz 12 16 30 38 216.1250 MHz 216.2750 MHz 216.3750 MHz 216.7250 MHz 216.9250 MHz 43 46 48 55 59 GROUP D FREQUENCY GROUP 4 CHANNEL FREQUENCY CHANNEL FREQUENCY 14 18 32 40 216.1875 MHz 216.3375 MHz 216.4375 MHz 216.7875 MHz 216.9875 MHz 44 47 49 56 60 216.1750 MHz 216.3250 MHz 216.4250 MHz 216.7750 MHz 216.9750 MHz Page 10 M-216 OPTIONAL ACCESSORIES Optional Accessories 1. NBC 9-2C Battery charger 2. NH9-150 Rechargeable batteries 3. P1 Universal pouch 4. BC-216 Snap-on belt clip (supplied with M-216) 5. LW-216 Whip antenna (supplied with M-216) 6. PSC-HM Head worn unidirectional electret microphone 7. SM-185 Unidirectional electret condenser microphone Auxiliary Audio Input Cords 8. 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) Page 11 M-216 SPECIFICATIONS Audio Input: • Microphone input impedance for electret type microphone - 3000 ohm • Aux/Line input impedance - 10 k ohm at 0 dB nominal Connectors: Microphone - Micro-mini mono 2.5mm Auxiliary - Mini stereo 3.5mm Audio: Tip and sleeve Battery Charging: Tip and sleeve Controls 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 switch Frequency Response: 80 Hz to 10 kHz Audio Distortion: Less than 1% at 80% modulation Modulation Limiter: Soft compressor with 30 dB linear overload protection, attack time - less than 1 ms, recovery time - 10 ms Modulation: • 5 kHz deviation Ch. 1-40 (non-companded) • 10 kHz deviation Ch. 41-60 (companded) Out of Band Emissions: Better than 45 dB below carrier R.F. Stability: 20 ppm XTL controlled Digitally synthesized RF Power Output: 10 mW to antenna system Antenna System: Body worn microphone cord, or loaded whip plugged directly into microphone connector when auxiliary input is used Current Drain: 13 mA constant current Battery: • 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 operation Dimensions: 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 95 Operating Radio Frequency: ity: 57 synthesized channels in the 216-217 MHz LPRS band under F.C.C. part 95 NOTE: Specifications subject to change without notice or obligation Page 12 M-216 WARRANTY AND SERVICE Warranty COMTEK warrants this product to be free from defects in workmanship and material under normal use and conditions for a period of one year from date of original purchase. Items such as batteries, neckloops, and cords are not covered by the warranty. Damage due to misuse, ill treatment and unauthorized modification and repairs are not covered by this warranty. COMTEK is not liable for consequential damages arising out of any failure of the equipment to perform as intended. COMTEK shall bear no responsibility or obligation with respect to the manner of use of any equipment sold by it. COMTEK SPECIFICALLY DISCLAIMS AND NEGATES ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF SUCH EQUIPMENT INCLUDING, WITHOUT LIMITATION, ANY WARRANTY THAT THE USE OF SUCH EQUIPMENT FOR ANY PURPOSE WILL COMPLY WITH APPLICABLE LAWS AND REGULATIONS. Service Policies Warranty repairs must be done by COMTEK. Only factory technicians are authorized to perform warranty service on the M-216 transmitter. Before returning the M-216 for service, a Return Authorization Number should be obtained from the service department by calling 1-800-496-3463 or 1-801-466-3463. 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 States for all warranty service. 357 West 2700 South • Salt Lake City, Utah 84115 Phone: (800) 496-3463 • Fax: (801) 484-6906 Web Page: http://www.comtek.com 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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