Lectrosonics MM400 Wireless Microphone Transmitter User Manual mm400man

Lectrosonics Inc Wireless Microphone Transmitter mm400man

users manual

MM200/MM400FREQUENCY-AGILE UHF MINIATUREBELT-PACK TRANSMITTERLECTROSONICS, INC.Rio Rancho, NMwww.lectrosonics.comOPERATING INSTRUCTIONSand trouble-shooting guide
2The MM400 transmitter is FCC type accepted under Part 74: 536-608 MHz and 614-806 MHzWARNING! TO PREVENT INTERNAL CORROSION!If the transmitter is wet (either due to immersion or high levels of perspiration),BEFORE opening any covers or connectors, carefully blot the transmitter dry witha clean paper towel or cloth. Remove all moisture. After opening any connector orcover, carefully blot up any remaining moisture that may have remained around theseal. THIS IS IMPORTANT! DO NOT CLOSE ANY COVER OR CONNECTORBEFORE MAKING CERTAIN THERE IS NO MOISTURE IN OR NEAR THEOPENING. After use, it is important to store the transmitter in a dry place with allaccess doors and connectors opened to allow any internal humidity to evaporate.Specifically, open the battery door, the frequency cover plate and fully unscrew andremove the microphone connector before storing. Do NOT store wet and do NOTstore sealed. If moisture is sealed inside the unit it has nowhere to go other than tochemically react with and destroy components and the printed circuit board.TABLE OF CONTENTSWARNING! TO PREVENT INTERNAL CORROSION! ................................ 2INTRODUCTION ................................................................................................... 3GENERAL TECHNICAL DESCRIPTION .............................................................. 3Temporary Placeholder ......................................................................................... 4CONTROLS AND FUNCTIONS ............................................................................ 6BATTERY INSTALLATION .................................................................................... 7OPERATING INSTRUCTIONS .............................................................................. 8OPERATING NOTES ............................................................................................ 8ADJUSTING THE TRANSMITTER FREQUENCY ............................................... 8MICROPHONE RF Bypassing ............................................................................. 9TROUBLESHOOTING........................................................................................... 9SPECIFICATIONS AND FEATURES ................................................................. 10SERVICE AND REPAIR...................................................................................... 11RETURNING UNITS FOR REPAIR .................................................................... 12WARRANTY ..........................................................................................Back cover
3Frequency Agile UHF Miniature Belt-Pack TransmitterRio Rancho, NM – USAINTRODUCTIONThank you for selecting the Lectrosonics MM400 frequency agile UHF miniaturetransmitter. The MM400 combines over 80 years of engineering experience with thevery latest components, in a design that addresses the most demanding professionalapplications.The design of the MM400 was the direct result of numerous conversations with users,staging and touring companies and dealers across the US. The specific concerns andneeds brought up in these conversations led directly to the development of theoperational features offered on the MM400. Two hundred fifty six frequencies are userselectable in 100kHz steps to alleviate interference problems in traveling venues.The MM400 is a rugged, machined stainless steel package with a removable, springloaded belt clip. 3.3 Volts of bias voltage is available to power electret mics. Levelindicating LEDs are provided on the control panel to make level settings quick andaccurate, without having to view the receiver. The battery compartment accepts AAalkaline or lithium batteries. The antenna is a detachable, locking ¼ wavelengthflexible bronze cable that connects to a 50 Ohm SMA port on the transmitter.Only the MM400 transmitter is covered in this manual. Companion receivers arecovered in separate manuals. The transmitter will operate with any 400 SeriesLectrosonics receiver in the same frequency group.If you have a miniature transmitter marked as a MM200 transmitter, this is a factoryprogrammed variant of the MM400 that uses the Digital Signal Processor in theMM400 to model the dual band compander used in the 200 series with the appropriatecompander time constants and frequency division. Since the signals are convertedfrom analog to digital, processed and then converted back to analog, there is a delayas with all digital audio systems. This delay is 1.6 mS or an equivalent audio pathlength delay of 18 inches. With the exception of the audio processing, all othercomments and instructions in this manual can be applied to either the MM400 orMM200.GENERAL TECHNICAL DESCRIPTIONIf the unit will be used in a wet environment (possible immersion, perspiration, rain scenes, etc.) – be certain allconnectors have intact gaskets and that a properly sealed Lectrosonics’ waterproof mic connector is installed andused with the microphone.GENERALThe 400 system uses 75kHz wide deviation for an extremely high signal to noise ratio. The switching power suppliesprovide constant voltages to the transmitter circuits from the beginning (1.5 Volts) to the end (0.85 Volts) of battery life.The input amplifier uses an ultra low noise op amp for quiet operation. It is gain controlled with a wide range dualenvelope input compressor which cleanly limits input signal peaks over 30dB above full modulation.
4MM400 Block DiagramDIGITAL HYBRID TECHNOLOGYAll wireless links suffer from channel noise to some degree, and all wireless microphone systems seek to minimizethe impact of that noise on the desired signal. Conventional analog systems use compandors for enhanced dynamicrange, at the cost of subtle artifacts (known as “pumping” and “breathing”). Wholly digital systems defeat the noise bysending the audio information in digital form, at the cost of some combination of power, bandwidth and resistance tointerference.The Lectrosonics Digital Hybrid system overcomes channel noise in a dramatically new way, digitally encoding theaudio in the transmitter and decoding it in the receiver, yet still sending the encoded information via an analog FMwireless link. This proprietary algorithm is not a digital implementation of an analog compandor but a technique whichcan be accomplished only in the digital domain, even though the inputs and outputs are analog signals. (As of thiswriting, the patent is still pending, so we cannot reveal detailed information about the algorithm at this time.)Channel noise still has an impact on received signal quality and will eventually overwhelm the receiver. The DigitalHybrid simply encodes the signal to use a noisy channel as efficiently and robustly as possible, yielding audio perfor-mance that rivals that of wholly digital systems, without the power and bandwidth problems inherent in digital transmis-sion. As always, these advantages come at a cost. The Digital Hybrid system requires fairly intensive digitalprocessing in both the transmitter and the receiver. These processors cost money, take up space and consume power.The Digital Hybrid system also requires that the underlying RF link be of excellent quality, with better frequencyresponse and distortion characteristics than that required by conventional systems.Because it uses an analog FM link, the Digital Hybrid enjoys all the benefits of conventional FM wireless systems,such as excellent range, efficient use of RF spectrum, and resistance to interference. However, unlike conventionalFM systems, the Digital Hybrid has done away with the analog compandor and its artifacts.DUAL BAND COMPANDOR MODELING in the MM200Traditionally, compandors have been a source of distortion in wireless microphone systems. The basic problem withconventional systems is that the attack and decay times are always a compromise. If the time constants are fast, highfrequency transients will not be distorted, but this will cause low frequency distortion. If the time constants are slower,low frequency audio distortion will be low, but high frequency transients will then be distorted. The 200 system intro-duces an entirely new approach to solving this basic problem, called “dual-band companding.”TransmitterPhase Locked LoopVoltageControlledOscillatorFreqSwitches(Fits Switchcraftplug #850.)11001001A-DConverterDigital Signal Processor11001001D-AConverterShuntLimiterBicolorModulationLEDsMicroprocessor1.5VAALithiumSwitchingPowerSupply+3.3v+3v+1.8v+6v-3v50 IsolatorHi/LoPassFilterAudioEncodedAudio +Pilot Tone4MHzReferenceBicolorPowerLEDMicJack+3V BiasSupplyAudioLevelInputAmp
5Frequency Agile UHF Miniature Belt-Pack TransmitterRio Rancho, NM – USAThere are actually two separate compandors in the 200 system, one for high frequencies and one for low frequencies.A crossover network separates the frequency bands at 1kHz with a 6dB per octave slope, followed by separate highand low frequency compandors. The attack and release times in the high frequency compandor are fast enough to keephigh frequency transient distortion at a low level, and the low frequency compandor uses slower time constants,reducing low frequency distortion to well below that of a conventional compandor.NO PRE-EMPHASIS/DE-EMPHASISThe signal to noise ratio of the 400 and 200 systems is high enough to preclude the need for conventional pre-empha-sis (HF boost) in the transmitter and de-emphasis (HF roll off) in the receiver. Pre-emphasis and de-emphasis in anFM radio system usually provides about a 10dB improvement in the signal to noise ratio of the system, but the highfrequency boost in the transmitter must be removed in a purely complementary manner or else the frequency responseof the original audio signal will be altered.Pre-emphasis can also cause distortion in the receiver. As this signal is passed through the IF filters in the receiver,distortion can be produced, most noticeable at full modulation. De-emphasis cannot be applied until the signal isconverted into audio, so there is no way around this problem short of eliminating pre-emphasis altogether. Neither ofthese problems occur in the 400 system. The dual-band compandor in the modeled 200 Series system essentiallyprovides a dynamic pre-emphasis/de-emphasis function with low distortion.LOW FREQUENCY ROLL-OFFA 12 dB per octave low frequency roll-off is provided in the audio section, with the -3dB point at 70 Hz. The actual roll-off frequency will vary somewhat according to the low frequency response of the mic capsule being used.The low frequency roll-off is used to remove subsonic (or very low frequency) audio, often produced by air conditioningsystems, automobile traffic and other sources from the audio signal. Excessive low frequency content in the audioinput can cause a variety of audio problems including driving the transmitter into limiting. In sound reinforcementsystems, as one instance, excessive low frequency content can cause excessive power amplifier drain or evendamage to loudspeaker systems.PILOT TONE SQUELCHThe 400 system utilizes one of 256 different ultrasonic tones between 25 and 32 kHz, that modulate the carrier tooperate the receiver squelch. The “pilot tone” frequency is chosen according to which of the 256 channels has beenselected by the frequency switch setting. The MM200, however, has only a single tone at 32.765 kHz. The basicbenefit of the pilot tone squelch system is that the receiver will remain muted until it receives the pilot tone from thematching transmitter, even if a strong RF signal is present on the carrier frequency of the system. The MM400 extendsthis concept even farther by insuring that all transmitters in a system have different pilot tone frequencies so that evenspurious RF from the wrong transmitters can’t open the receiver squelch.WIDE-BAND DEVIATION±75kHz deviation improves the capture ratio, signal to noise ratio and AM rejection of a wireless system dramatically,compared to the more commonly used ±15kHz deviation.BATTERY LIFESwitching power supplies throughout the design allow about 4.5 hours of operation using a single AA lithium battery.(An alkaline or NiMh AA battery will provide about 2 hours of operation.) The battery contacts are spring loaded toprevent “rattle” as the unit is handled.FREQUENCY AGILITYThe transmitter section uses a synthesized, frequency selectable main oscillator. The frequency is extremely stableover a wide temperature range and over time. Two rotary switches, located on the side panel of the unit, provide 256frequencies in 100kHz steps over a 25.5MHz range. This alleviates carrier interference problems in mobile or travelingapplications.CIRCULATORThe RF output circuit includes a one way circulator/isolator using a magnetically polarized ferrite. This device greatlyreduces RF intermodulation produced when multiple transmitters are used at separations of less than five feet. It alsoprovides additional RF output stage protection but is rarely seen in a wireless microphone transmitter due to its highcost.
6CONTROLS AND FUNCTIONSMIC JACKThe Microplug (2.5 mm) input on the transmitter accommodates 2 wire positive bias lavalieres. A waterproof micconnector is available from Lectrosonics as an assembly kit. A Switchcraft 850 connector can be used in an emer-gency though it is not waterproof. See the separate sheet titled “Waterproof Microplug Wiring” regarding thecorrect connections for various microphones, and other sources.ON/OFF SWITCHThere is no on/off switch for this unit. Simply remove the battery to turn the unit off. There will be a thump in thereceiver when the transmitter battery is removed, so turning the received audio off in the main sound system may benecessary.“POWER” LAMPGlows green when the battery is good. When the lamp glows red, there is about 30 minutes of operation left with therecommended lithium battery. An alkaline battery will have about 20 minutes of life left. The lamp will flash red whenthere are only a few minutes of life. A NiMh battery will give little or no warning when it is depleted. If you wish to useNiMh batteries in the MM400, we recommend trying fully charged batteries in the unit, noting the length of time that thebatteries will run the unit and in the future use somewhat less than that time to determine when the battery needs to bereplaced. A weak battery will sometimes light the POWER LED to the “good” green indication immediately after beingput in the unit, but will soon discharge to the point where the LED will go red or shut down, just like a flashlight with“dead” batteries.FREQUENCY ADJUSTThese two rotary switches adjust the center frequency of the carrier. The 1.6M isa coarse adjustment and the 100K is the fine adjustment.Unscrew the knurled knob a few turns to loosen the water tight cap to gain accessto the two frequency switches.0123456789ABCDEF0123456789ABCDEF1.6M 100KANTENNA MIC–10–20POWERLECTRODigital Hybrid WirelessMM400AUDIOLEVELAA BATTERYSN: XXXXU.S. Patent PendingFCCID:DBZMM400Lectrosonics, Inc.Made in U.S.AMIC JACKPOWER LAMPFREQUENCYADJUSTMODULATIONLEDsAUDIOLEVELANTENNABATTERYCOMPARTMENT
7Frequency Agile UHF Miniature Belt-Pack TransmitterRio Rancho, NM – USAMODULATION LEDSIndicate the proper setting of the MIC LEVEL control. There are two bicolor modulation LEDs that can light either red orgreen.“-20dB level”One modulation LED glows green and the transmitter is 20 dB below full modulation.“-10 dB level”Both modulation LEDs glow green and the transmitter is close to full modulation.“+0 dB level”One Led is red and the other is green. The transmitter is in slight limiting and is fully modulated.This is probably desirable. See the discussion below.“+10 dB level”Both LEDs are red.. The transmitter is in limiting and you may want to reduce the transmitter audiogain. See the discussion below.The 400 series transmitters employ a digitally-controlled analog audio limiter just before the analog-to-digitalconverter. The limiter has a range of more than 30dB for excellent overload protection. A dual release envelopemakes the limiter acoustically transparent while maintaining low distortion. It can be thought of as two limiters inseries, connected as a fast attack and release limiter followed by a slow attack and release limiter. The limiterrecovers quickly from brief transients, so that its action is hidden from the listener, but recovers slowly fromsustained high levels, to both keep audio distortion low and preserve short term dynamic changes.The audio level LEDs indicate limiter activity. The first red LED indicates that the limiter is active and that thetransmitter is fully modulated (audio level is between +0 and +10 dB). The second red LED indicates that thelevel is 10dB or more into limiting. Occasional forays into the red are desirable for most applications, since thedistortion introduced by the limiter is so minimal, and full modulation is thus assured. We strongly recommendsetting the gain of the transmitter high enough so that the first red LED occasionally lights.Generally speaking, some limiting is desirable in normal operation to improve the signal to noise ratio of thesystem. The limiting action is not audible and does not create distortion. A highly trained ear would hear only thecompression of the peaks in the audio signal, which is desirable with most recorders and many sound reinforce-ment systems.AUDIO LEVELUsed to adjust the audio input level for the proper modulation.ANTENNAThe flexible bronze cable antenna supplied with the transmitter is cut to ¼ wavelength of the center of the frequencyblock (the frequency range) of the transmitter. It is removable via an SMA connector. The SMA connector is a50 Ohm RF port which can also be connected directly to test equipment. Replacement antennas are available in pre-cut lengths for specific frequency blocks, or as a kit with instructions to cut the antenna for any frequency block.THE BELT CLIPThe belt clip may be removed for special applications by gently spreading the spring wire clip and pulling the ends outof the holes in the case. The clip can be installed in two positions so that when worn, the antenna can be pointing upor down.
8BATTERY INSTALLATIONThe transmitter is powered by a standard lithium, NiMh or alkaline AA 1.5 Volt battery. Standard zinc-carbon batteriesmarked “heavy-duty” or “long-lasting” will not work. NiMh rechargeable batteries will only provide 2 hours ofoperation but will run down quite abruptly. Alkaline batteries provide over 2 hours of operation with some warning.Lithium batteries can be used to provide up to 4.5 hours. The battery status circuitry is designed for the voltage dropover the life of lithium batteries.To open the battery compartment, unscrew the battery door. Remove the door and take note of the polarity marked onthe case showing the location of the positive (+) and negative (-) terminals. You can see the small contact hole insidethe battery compartment with the door open.Insert the battery correctly and close the cover by screwing the door shut. If the battery is inserted incorrectly, thedoor will not screw in easily and the unit will not work.OPERATING INSTRUCTIONS1) Insert the microphone plug into the input jack, aligning the pins; be sure that the connector locks in.2) Attach the antenna to the SMA connector on the top of the transmitter.3) Mute the sound system.4) Install a fresh battery according to the instructions above.5) Position the microphone in the location you will use in actual operation.6) While speaking or singing at the same voice level that will actually be used, observe the MODULATION LEDs.Adjust the AUDIO LEVEL control until the LEDs begin to light. Start at a low setting where neither LED lights asyou speak. Gradually, turn the gain up until the –20 dB LED lights green and then the -10 dB lights green. Westrongly recommend setting the gain of the transmitter even higher so that the first red LED occasionally lights.7) Once the gain has been adjusted, the audio system audio can be turned on to make level adjustments in the mainaudio system.OPERATING NOTESThe AUDIO LEVEL control should not be used to control the volume of your sound system or recorder levels. Thisgain adjustment matches the transmitter gain with the user’s voice level and microphone positioning.If the audio level is too high — both red LEDs will light frequently or stay lit. This condition may reduce the dynamicrange of the audio signal.If the audio level is too low — neither LED will light, or the -20 LED will light green. This condition may cause hiss andnoise in the audio. Different voices will usually require different settings of the AUDIO LEVEL control, so check thisadjustment as each new person uses the system. If several different people will be using the transmitter and there isnot time to make the adjustment for each individual, adjust it for the loudest voice.
9Frequency Agile UHF Miniature Belt-Pack TransmitterRio Rancho, NM – USAADJUSTING THE TRANSMITTER FREQUENCYIf you are experiencing interference from another signal on your frequency,you may want to change the operating frequency of your system. The leftswitch changes the operating frequency by 1.6 MHz per step and the rightswitch changes it 100 kHz per step. If you are experiencing interference,change the operating frequency in 100 kHz steps to find a clear channel. If itis not possible to find a clear channel using the 100 kHz switch, return it toits original position and change the 1.6 MHz switch by one click then try the100 kHz switch again.To gain access to these switches, unscrew the retaining bolt that holds theaccess door to the case. It is not necessary to remove the bolt from the case since it is retained by the case withenough room to still remove the access door. Pull the access door away from the case and swing the door to the sideto gain access to the frequency switches.0123456789ABCDEF0123456789ABCDEF1.6M 100KMICROPHONE RF BYPASSING3 WIRE MIC2 WIRE MICCAPSULE CAPSULESHIELDAUDIOSHIELDAUDIOBIASMICCONNECTORMICCONNECTORPreferred locations for bypass capacitorsAlternate locations for bypass capacitorsSome mics require RF protection to keep the radio signalfrom affecting the capsule, even though the transmitterinput circuitry is already RF bypassed.If the mic is wired as directed, and you are havingdifficulty with squealing, high noise, or poor frequencyresponse; RF is likely to be the cause.The best RF protection is accomplished by installing RFbypass capacitors at the mic capsule. If this is notpossible, or if you are still having problems, capacitorscan be installed on the mic wires inside the TA5F connec-tor housing.Install the capacitors as follows: Use 330 pF capacitors.Capacitors are available from Lectrosonics. Pleasespecify the part number for the desired lead style.Leaded capacitors: P/N 15117Leadless capacitors: P/N SCC330PAll Lectrosonics lavalier mics are already bypassed anddo not need any additional capacitors installed for properoperation.
10TROUBLESHOOTINGBefore going through the following chart, be sure that you have a good battery in the transmitter. It is important thatyou follow these steps in the sequence listed.SYMPTOM POSSIBLE CAUSETRANSMITTER BATTERY LED OFF 1) Battery is inserted backwards.2) Battery is dead.NO TRANSMITTER MODULATION LEDs 1) Gain control turned all the way down.2) Battery is in backwards. Check power LED.3) Mic capsule is damaged or malfunctioning.4) Mic cable damaged or mis-wired.RECEIVER INDICATES NO RF 1) Transmitter not turned on.2) Transmitter battery is dead.3) Receiver antenna missing or improperly positioned.4) Transmitter and receiver not on same frequency. Checkswitches/display on transmitter and receiver.5) Operating range is too great.6) Transmitter antenna not connectedNO SOUND (OR LOW SOUND LEVEL), 1) Receiver output level set too low.RECEIVER INDICATES PROPER AUDIO 2) Receiver output is disconnected; cable is defectiveMODULATION or mis-wired.3) Sound system or recorder input is turned down.DISTORTED SOUND 1) Transmitter gain (audio level) is far too high. Check modlevel lamps on transmitter and receiver as it is being used.(refer to “Operating Instructions” section for details on gainadjustment)2) Receiver output may be mis-matched with the soundsystem or recorder input. Adjust output level on receiverto the correct level for the recorder, mixer or soundsystem.3) Excessive wind noise or breath “pops.” Repositionmicrophone and/or use a larger windscreen.4) Transmitter is not set to same frequency as receiver.Check that frequency select switches on receiver andtransmitter match.HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) far too low.2) Receiver antenna missing or obstructed.3) Transmitter antenna missing.4) Operating range too great.EXCESSIVE FEEDBACK 1) Transmitter gain (audio level) too high causing limiting.Check gain adjustment and/or reduce receiver output level.2) Transmitter too close to speaker system.3) Mic is too far from user’s mouth.
11Frequency Agile UHF Miniature Belt-Pack TransmitterRio Rancho, NM – USASPECIFICATIONS AND FEATURESOperating frequencies: 537.600 to 607.900 MHz614.100 to 793.500 MHzFrequency selection: 256 frequencies in 100kHz stepsRF Power output: 100 mW (nominal)Pilot tone: 25 to 32 kHz (32.765 kHz on MM200); 5kHz deviationFrequency stability: ± 0.002%Deviation: ± 75 kHz (max)Spurious radiation: 90 dB below carrierEquivalent input noise: –123 dBVInput level: Nominal 2 mV to 300 mV, before limiting.Greater than 1.5V maximum, with limiting.Input impedance: 2 kOhmInput compressor: Soft compressor, >30 dB rangeGain control range: 43 dB; semi-log rotary controlModulation indicators: Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referencedto full modulation.Low frequency roll-off: –12dB/octave; 70 HzControls: Front panel knob adjusts audio gain. Rotary switches on bottom panel adjusttransmitter frequency.Audio Input Jack: 2.5 mm Microjack (matches Switchcraft 850 Microplug)Antenna: Detachable, flexible bronze wire supplied. 50 Ohm port allowsconnection to test equipment.Battery: 1.5 Volt AA lithium recommendedBattery Life: 1.5 hours (alkaline); 4 hours (lithium)Weight: 7.3 ozs. including batteryOverall Dimensions: 3.03 x 2 x 0.69 inches (not including microphone or antenna)Emission Designator: 180KF3ESpecifications subject to change without notice.The FCC requires that the following statement be included in this manual:FCC RF Exposure StatementThis device complies with FCC radiation exposure limits as setforth for an uncontrolled environment. This device should beinstalled and operated so that its antenna(s) are not co-located oroperating in conjunction with any other antenna or transmitter.
12SERVICE AND REPAIRIf your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipmentneeds repair. Make sure you have followed the setup procedure and operating instructions. Check out the intercon-necting cords and then go through the TROUBLESHOOTING section in the manualWe strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shopattempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose connec-tion, send the unit to the factory for repair and service. Don’t attempt to adjust any controls inside the units. Once setat the factory, the various controls and trimmers do not drift with age or vibration and never require readjustment.There are no adjustments inside that will make a malfunctioning unit start working.LECTROSONICS service department is equipped and staffed to quickly repair your equipment. In-warranty repairs aremade at no charge in accordance with the terms of the warranty. Out of warranty repairs are charged at a modest flatrate plus parts and shipping. Since it takes almost as much time and effort to determine what is wrong as it does tomake the repair, there is a charge for an exact quotation. We will be happy to quote approximate charges by phone forout of warranty repairs.RETURNING UNITS FOR REPAIRYou will save yourself time and trouble if you will follow the steps below:A. DO NOT return equipment to the factory for repair without first contacting us by letter or by phone. We need to knowthe nature of the problem, the model number and the serial number of the equipment. We also need a phone numberwhere you can be reached 8 am to 4 pm (Mountain Standard Time).B. After receiving your request, we will issue you a return authorization number (R.A.). This number will help speedyour repair through our receiving and repair departments. The return authorization number must be clearly shown onthe outside of the shipping container.C. Pack the equipment carefully and ship to us, shipping costs prepaid. If necessary, we can provide you with theproper packing materials. UPS is usually the best way to ship the units. Heavy units should be “double-boxed” forsafe transport.D. We also strongly recommend that you insure the equipment, since we cannot be responsible for loss of or damageto equipment that you ship. Of course, we insure the equipment when we ship it back to you.Mailing address: Shipping address: Telephones:Lectrosonics, Inc. Lectrosonics, Inc. Regular: (505) 892-4501PO Box 15900 581 Laser Rd. Toll Free (800) 821-1121Rio Rancho, NM 87174 Rio Rancho, NM 87124 FAX: (505) 892-6243USA USAWorld Wide Web: http://www.lectrosonics.com Email: sales@lectrosonics.com
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LIMITED ONE YEAR WARRANTYThe equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warranty does not apply to used or demonstrator equipment.Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot correct the defect in your equipment, it will be replaced at no charge with a similar new item. Lectrosonics, Inc. will pay for the cost of returning your equipment to you.This warranty applies only to items returned to Lectrosonics, Inc. or an authorized dealer, shipping costs prepaid, within one year from the date of purchase.This Limited Warranty is governed by the laws of the State of New Mexico. It states the entire liablility of Lectrosonics Inc. and the entire remedy of the purchaser for any breach of warranty as outlined above. NEITHER LECTROSONICS, INC. NOR ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT SHALL BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL, OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS EQUIPMENT EVEN IF LECTROSONICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF LECTROSONICS, INC. EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE EQUIPMENT.This warranty gives you specific legal rights. You may have additional legal rights which vary from state to state.LECTROSONICS, INC.581 LASER ROADRIO RANCHO, NM 87124 USAwww.lectrosonics.comJune 3, 2002LIMITED ONE YEAR WARRANTY

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