Lectrosonics MM400E WIRELESS MICROPHONE TRANSMITTER User Manual USERS MANUAL

Lectrosonics Inc WIRELESS MICROPHONE TRANSMITTER USERS MANUAL

USERS MANUAL

MM400CWatertight Miniature UHF Belt-Pack TransmitterFeaturing Digital Hybrid Wireless® TechnologyINSTRUCTION MANUALRio Rancho, NM, USAwww.lectrosonics.comFill in for your records: Serial Number: Purchase Date:
MM400CLECTROSONICS, INC.2
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 3Thank you for selecting the Lectrosonics MM400C watertight miniature transmitter. The unique design provides several distinct features for professional ap-plications: • OutstandingRFoperatingrange • Superbaudioquality • Ultra-lightweight,corrosionresistanthousing • Watertightsealsforuseinwetenvironments • Programmableemulationmodesformaximum versatilityThepatentedDigitalHybridWireless® design combines 24-bit digital audio with analog FM techniques to pro-vide the operating range of the finest analog wireless systems and the audio quality of a pure digital system. The100mWRFoutputpowerextendsoperatingrange,and the DSP controlled, dual-envelope limiter cleanly handles input peaks to allow higher gain settings. This combinationmaximizesoperatingrangeandthesignalto noise ratio of the system.The input provides 6 VDC bias voltage for use with modern electret lavaliere microphones. Multi-color LEDs are provided to make input gain adjustments quick and accurate, without having to view the receiver. The battery compartment accepts AA alkaline, lithium or NiMH batteries, and a detachable antenna ¼ wave-lengthexiblecableconnectstoawatertight50OhmSMA port on the transmitter.The MM400C is machined from a solid aluminum block to provide the lightweight, rugged package needed in extremeenvironmentswithoutcompromisingfunctional-ity.InputjacksandcontrolsareO-ringsealedforwater-tight protection in wet environments. A special noncor-rosivenishresistssaltwaterexposureandperspirationinextremeenvironments.The DSP-based design offers backward compatibility with a handful of earlier analog designs, such as the Lectrosonics 100 and 200 Series receivers, and some other brands of analog wireless receivers. Compat-ibility Modes are easily selected with a sequence of frequency switch settings and cycling the unit’s power. OnlytheMM400Ctransmitteriscoveredinthismanual.Companion receivers are covered in separate manuals.
MM400CLECTROSONICS, INC.4
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 5Table of ContentsGeneral Technical Description ..............................................................................................................................................................6General .................................................................................................................................................................................................6DigitalHybridWireless® Technology* ....................................................................................................................................................6LowFrequencyRoll-Off ........................................................................................................................................................................6Input Limiter ..........................................................................................................................................................................................7Digital Signal Processor ........................................................................................................................................................................7Microprocessor,PLLandVCOCircuits.................................................................................................................................................7Compatibility Modes ..............................................................................................................................................................................7Pilot Tone Squelch ................................................................................................................................................................................7Wide-BandDeviation ............................................................................................................................................................................7MagneticPowerON/OFFSwitch ..........................................................................................................................................................7BatteryLife ............................................................................................................................................................................................7Frequency Agility...................................................................................................................................................................................7Circulator/Isolator ..................................................................................................................................................................................7Controls and Functions .........................................................................................................................................................................8Preventing Internal Corrosion ...............................................................................................................................................................8PowerON/OFFSwitch ..........................................................................................................................................................................8Power LED ............................................................................................................................................................................................8Mic Jack ................................................................................................................................................................................................9Audio Level ...........................................................................................................................................................................................9Modulation LEDs ...................................................................................................................................................................................9Frequency Select Switches ...................................................................................................................................................................9Antenna .................................................................................................................................................................................................9BeltClip .................................................................................................................................................................................................9BatteryInstallation ..............................................................................................................................................................................10OperatingInstructions .........................................................................................................................................................................11Selecting the Compatibility Mode ........................................................................................................................................................11Adjusting Transmitter Frequency .........................................................................................................................................................11Attaching a Microphone and Adjusting Audio Levels ..........................................................................................................................12Power Switch Function Selection ........................................................................................................................................................13Determine Power Switch Function Mode ........................................................................................................................................13Changing Power Switch Function ....................................................................................................................................................13Replacing the Power Switch Magnet Housing Assembly .................................................................................................................14Microphone RF Bypassing ..................................................................................................................................................................15Replacement Parts and Accessories ..................................................................................................................................................16UHF Transmitter Antenna Specifications ............................................................................................................................................16Troubleshooting ....................................................................................................................................................................................17Specifications and Features ................................................................................................................................................................18Service and Repair ...............................................................................................................................................................................19Returning Units for Repair ..................................................................................................................................................................19
MM400CLECTROSONICS, INC.6GeneralThe400Series(orDigitalHybridWireless®) system uses75kHzwidedeviationforanextremelyhighsignalto noise ratio. The switching power supplies provide constant voltages to the transmitter circuits from the be-ginning(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 dual envelope input compressor which cleanly limits inputsignalpeaksover30dBabovefullmodulation.Note: The terms 400 Series and Digital Hybrid Wireless® describe the same product line are interchangeable.Digital Hybrid Wireless® TechnologyAll wireless links suffer from channel noise to some degree, and all wireless microphone systems seek to minimizetheimpactofthatnoiseonthedesiredsignal.Conventional analog systems use compandors for enhanced dynamic range, at the cost of subtle artifacts (knownas“pumping”and“breathing”).Whollydigitalsystems defeat the noise by sending the audio informa-tion in digital form, at the cost of some combination of power, bandwidth and resistance to interference.TheLectrosonicsDigitalHybridWireless® system over-comes channel noise in a dramatically new way, digitally encoding the audio in the transmitter and decoding it in the receiver, yet still sending the encoded informa-General Technical Descriptiontion via an analog FM wireless link. This proprietary algorithm is not a digital implementation of an analog compandor but a technique which can be accomplished only in the digital domain, even though the inputs and outputs are analog signals.BecauseitusesananalogFMlink,DigitalHybridWire-less® enjoys all the benefits of conventional FM wireless systems,suchasexcellentrange,efcientuseofRFspectrum, and resistance to interference. However, unlike conventional FM systems, the Digital Hybrid has done away with the analog compandor and its artifacts.Low Frequency Roll-OffA12dBperoctavelowfrequencyroll-offisprovidedintheaudiosection,withthe-3dB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, such as that produced by air conditioning systems or automobile traffic from the audiosignal.Excessivelowfrequencycontentintheaudio input can cause a variety of audio problems in-cludingdrivingthetransmitterintolimiting.Forexam-ple, in sound reinforcement systems, as one instance, excessivelowfrequencycontentcancauseexcessivepower amplifier drain or even damage to loudspeaker systems.+5V Bias11.3 MHz
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 7Input LimiterThe MM400C transmitters employ a DSP-controlled an-alog audio limiter just before the analog-to-digital con-verter.Thelimiterhasarangeofmorethan30dBforexcellentoverloadprotection.Adualreleaseenvelopemakes the limiter acoustically transparent while main-taining low distortion. It can be thought of as two limit-ers in series, connected as a fast attack and release limiter followed by a slow attack and release limiter. The limiter recovers quickly from brief transients, so that its action is hidden from the listener, but recovers slowly from sustained high levels, to both keep audio distortion low and preserve short term dynamic changes.Two bicolor LEDs indicate limiter activity. (See Operat-ing Instructions, Adjusting Audio Levels.) Generally speaking, some limiting is desirable in normal operation to improve the signal to noise ratio of the system. The limiting action is not audible and does not create distor-tion.Digital Signal ProcessorTheDSPconstructstheoriginaldigitizedaudiofromtheA-D Converter, adds an ultrasonic Pilot Tone to con-trol the receiver’s squelch (only in 400 Series and 200 Series Compatibility Mode with the Pilot Tone enabled – see Pilot Tone Squelch), and implements the user defined Compatibility Mode.Microprocessor, PLL and VCO CircuitsAn 8-bit microprocessor monitors user command inputs and numerous other internal signals. It also drives the Modulation LEDs, controls the Pilot Tone and operates thePLL/VCOcircuits.Compatibility ModesThe MM400C transmitter was designed to compatible with Lectrosonics 400 Series receivers and will yield the best performance when doing so. However, due to the exibilityofdigitalsignalprocessing,theMM400Cisalso able to operate with Lectrosonics 200 Series, Lec-trosonics100Series,IFBandcertainnon-Lectrosonicsanalog receivers in special compatibility modes. (Con-tact the Lectrosonics Sales Department for a complete list of compatible transmitters.)Pilot Tone SquelchThe 400 Series wireless system uses an ultrasonic tone between25and32kHztooperatethereceiversquelch.The pilot tone squelch system keeps the receiver muted until it receives the pilot tone from the matching trans-mitter, even if a strong RF signal is present on the car-rier frequency of the system. The “pilot tone” frequency isdifferentforeachofthe256availablecarrierfrequen-cies to prevent the pilot tone from being transferred to the wrong receiver via an intermodulation product. Wide-Band DeviationA±75kHzdeviationimprovesthecaptureratio,signalto noise ratio and AM rejection of a wireless system dramatically, compared to other designs that use 30 kHzto40kHzdeviation.Thiscombinedwithafull100mWofpoweroutputmakesasignicantimprovementinsignaltonoiseratioandmaximumoperatingrange.Magnetic Power/Mute SwitchA magnetic switch is used to control the application of power to the MM400C circuits and as an audio mute switch. The function of this switch can be set by the user. (See Controls and Functions, Magnetic Power ON/OFF Switch.)Battery LifeSwitching power supplies throughout the design allow over 6 hours of operation using a single AA lithium battery.(AnalkalineAAbatterywillprovideabout1.75hours and a 2200 mAh NiMH AA battery will provide about 4 hours of operating time.) The battery contacts are spring loaded in order to prevent “rattle” as the unit is handled.Frequency AgilityThetransmittersectionusesasynthesized,frequencyselectablemainoscillator.Thefrequencyisextremelystable over a wide temperature range and over time.Two 16-position rotary switches, located on the under a waterproofcoveronthebottomoftheunit,provide256frequenciesin100kHzstepsovera25.5MHzrange.This alleviates carrier interference problems, a definite problem in mobile or traveling applications.Circulator/IsolatorTheRFoutputcircuitincludesaonewaycirculator/iso-latorusingamagneticallypolarizedferrite.Thisdevicegreatly reduces RF intermodulation produced when multiple transmitters are used within a few feet of each other by blocking RF from returning back into the output stage. It also provides additional RF output stage protection but is rarely seen in a wireless microphone transmitter due to its high cost.
MM400CLECTROSONICS, INC.8Controls and FunctionsPreventing Internal CorrosionIt is very important that you properly dry the transmitter when it becomes wet due to immersion or high levels of perspiration BEFORE opening any covers or connec-tors. Follow the procedure below for best results:1. Carefully blot the transmitter dry with a clean paper towel or cloth. Remove all moisture. After open-ing any connector or cover, carefully blot up any remaining moisture that may have remained around the seal. IMPORTANT!DONOTCLOSEANYCOVERORCONNECTORBEFOREMAKINGCERTAINTHEREISNOMOISTUREINORNEARTHEOPENING.2. After use, it is important to store the transmitter in a dry place with all access compartments and connectors opened to allow any internal humidity to evaporate.Specically,opentheBatteryCompart-ment, the Frequency Switch Cover Plate and fully unscrew and remove the microphone connector before storing. Do not store wet and do not store sealed. If moisture is sealed inside the unit it has nowhere to go other than to chemically react with and destroy components and the printed circuit board.3. LubricateallrubberO-ringswithpetroleumjelly(such as Vaseline) after each use (included with transmitterandO-ringreplacementkits).DO NOT USE ANYTHING OTHER THAN PURE PETRO-LEUM JELLY. Silicone-based lubricants will dis-solvetherubber.FailingtolubricatetheO-ringsafter each use will significantly shorten their life.Power ON/OFF SwitchAwaterproof,magneticPowerON/OFFswitchislocated on the unit’s side panel. The switch actually consists of two components. A magnetically actuated internal component and a magnet housing assembly. The switch is designed so that the unit will still operate if the Switch Magnet Housing Assembly is missing or removed.ThefunctionofthePowerON/OFFSwitchcanalsobechanged so it operates as an audio mute switch. (See Operating Instructions, Power Switch Function Selec-tion.) These functions are illustrated in the chart below: Power Switch PositionFunction ON OFFNormal,or AppliesPower TurnsUnitOff Power Mode to UnitAudioMute TurnsOnAudio MutesAudio Mode IftheMM400CPowerON/OFFSwitchhasbeencon-figured for Audio Mute Mode, it is still possible to turn off the transmitter without removing the battery. This isdonebyplacingtheswitchintheONposition,thentogglingtheswitchbetweentheONandOFFpositionthreetimesinlessthanveseconds,i.e.,ON(StartingPosition)-OFF-ON-OFF-ON-OFF.Theuser-selectedcongurationofthePowerON/OFFswitch is stored in memory and persists until reconfig-ured by the user.Power LEDThePWRLEDprovidesanindicationofthebattery’scondition.ThePWRLEDglowsgreenwhenthebatteryis good. The color changes to red when there is about 30 minutes of operation left with the recommended lithium battery. (An alkaline battery will have about 20 minutesoflifeleft.)WhentheLEDbeginstoblinkred,there are only a few minutes of life left in the battery. ThePWRLEDblinksredforashortperiodwhenthetransmitter is configured for Normal Mode and the PowerON/OFFswitchissettoOFF.Attheendofthepoweroffsequence,thenPWRLEDextinguishes.Note: A NiMH battery gives little or no warning when it is depleted. If you use NiMH batteries in the MM400C, we recommend trying fully charged batteries first, noting the length of time that the batteries will run the unit , then plan for somewhat less time to determine when the battery needs to be replaced. Some Lectrosonics receivers have timers for use with these batteries.AweakbatterywillsometimescausethePWRLEDtoglow green immediately after being put in the unit, but will soon discharge to the point where the LED will blink red or shut off completely.Microphone JackFrequency Select SwitchThumbscrewand Cover PlateModulation andPower LEDsAudio Level ControlAntennaBattery Compartment CapPower ON/OFF Switch (ExternalSwitchMagnetHousing Assembly Shown.)
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 9Mic JackTheMicJackisa2.5mmmicroplugthatiswiredtoac-commodatetwo-wirepositivebiaslavalieres.WhiletheM152-WP(waterproof)isspecicallydesignedfortheMM400C, other two-wire lavaliere microphones can be adaptedtotheMM440CusingtheWPMC-3orWPMC-10kits.ASwitchcraft850connector(LectrosonicsP/N21357)canbeusedinanemergencythoughitisnotwaterproof. (See Replacement Parts and Accessories.)The equivalent input circuit wiring for the Mic Jack is shown below:Audio LevelThe Audio Level Control is used to adjust the audio input level from the microphone for proper modulation of the output signal from the transmitter.Modulation LEDsThe two bicolor Modulation LEDs provide a visual indication of the audio signal level input from the mi-crophone. These LEDs can glow either red or green to indicate modulation levels as shown in the following chart.Signal Level -20 LED -10 LEDLessthan-20dB Off Off-20dBto-10dB Green Off-10dBto+0dB Green Green+0dBto+10dB Red GreenGreaterthan+10db Red RedWhenthePowerON/OFFSwitchisconguredforAudioMute Mode, the -10 Modulat ion LED is also used to indicate if the transmitter is in an audio muted, or an unmuted condition. In Audio Mute Mode, if the Power ON/OFFswitchissettoOFF,thetransmitterremainspowered up; however, the audio is muted and the -10 Modulation LED blinks green.IfthePowerON/OFFswitchissettoONandtheswitchis configured for Audio Mute Mode, -10 and -20 LEDs operate normally to indicate audio level.MicJack330pF 330pFFBFB1002k2k30uF6V Mic BiasTo Mic Amp2k2.2nFFrequency Select Switches1.6M 100K0123456789ABCDEF0123456789ABCDEFFrequency Select SwitchesTwo 16-position rotary Frequency Select Switches are used to select the operating frequency, for setting Com-patiblityModesandforconguringthePowerON/OFFswitch.The switches are accessed by loosening the retaining screw holding the cover plate, lifting the cover away fromthehousingandrotatingittoexposetheswitches.For setting the operating frequency, the left switch (1.6MHz)adjuststheoperatingfrequencyupordownin1.6MHzincrements.Therightswitch(100kHz)ad-juststhefrequencyupordownin100kHzincrements.(See Operating Instructions, Adjusting the Transmitter Frequency.)A sequence of Frequency Select Switch settings and PowerON/OFFtogglesareusedtosetCompatibilityModesandforconguringthePowerON/OFFswitch.(See Operating Instructions, Setting Compatibility Modes and Power Switch Function Selection.)AntennaThepermanently-mounted,exiblesteelcableantennaiscutto1/4wavelengthofthecenterofthefrequencyblock (the frequency range) of the transmitter. Belt ClipThe belt clip may be removed for special applications by gently spreading the spring wire clip and pulling the ends out of the holes in the case. The clip can be installed in either the up or down position so that when the transmitter is worn, the antenna can be pointing up or down. Replacement belt clips are available. (See Replacement Parts and Accessories.)
MM400CLECTROSONICS, INC.10WARNING: Do not open battery compartment if unit is wet. Read “Preventing Internal Corrosion” on page 8 before proceeding.The transmitter is powered by a standard lithium, NiMH oralkalineAA1.5voltbattery.Thebatterystatuscircuitry is designed for the voltage drop over the life of lithiumbatteries.WhileNiMHrechargeablebatterieswillwork,theyrundownquiteabruptly.Becauseofthis,usingthePWRLEDtoverifybatterystatusnotreliablewith NiMH batteries. It is possible to track battery status usingtheBatteryTimerfunctionavailableinanum-ber of Lectrosonics receivers. (Refer to your receiver manual to determine if this function is available. Alkalinebatteriesprovideabout1.75hoursofoperationwith some warning. Lithium batteries can be used to provide over 6 hours of operation and provide about 30 minutes of warning as the LED turns red.Note:Standardzinc-carbonbatteriesmarked“heavy-duty” or “long-lasting” are not adequate.To access the battery compartment, unscrew and removetheBatteryCompartmentCover.Takenoteofthe polarity marked on the battery case showing the locationofthepositive(+)andnegative(-)terminals.Thepositive(+)batteryterminalgoesintothetransmit-terrst.ScrewtheBatteryCompartmentCoverbackinto the transmitter body. If the battery is inserted incor-rectly, the cover will not screw in easily and the unit will not work.Battery InstallationBattery Compartment
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 11Modulation LEDsPOWER LEDPower ON/OFF SwitchthetransmitterOff.6) Change the Frequency Select Switch settings to one of the following positions: • 100Seriesmode: 1,1 •200Seriesmode: 2,2 •Mode3:  3,3 •400Seriesmode: 4,4 •IFBSeriesmode: 5,57) Power up the unit briefly – just long enough to watch the LED’s glow and then turn the transmitter Off.8) Set the Frequency Select Switches to 0,0.9) Turn on the transmitter and observe the Modulation LEDs to verify the compatibility mode for the unit has changed.NOTE:Eachtimethetransmitteristurnedon,theModulation LEDs will confirm the current operating mode with the number of blinks listed in Step 2. The mode setting will not change until reset with the procedure listed above.Adjusting Transmitter FrequencyIfyouareexperiencinginterferencefromanothersignalon your operating frequency, you may need to change the operating frequency of your system. This is done through two Frequency Select Switches located under the Frequency Switch Cover Plate on the bottom of the transmitter case.0123456789ABCDEF0123456789ABCDEFFrequency Select Switches1.6M 100KThe left switch is for coarse frequency adjustment, and itincrementstheoperatingfrequencyin1.6MHzsteps.The right switch is for fine frequency adjustment and it incrementstheoperatingfrequencyin100kHzsteps.If you are using a 200 Series or 400 Series receiver, it is suggested to use the built in frequency spectrum scanning function on the associated receiver to find a clear channel. Turn the transmitter off and leave the receiver turned on. Scan across the frequency band to find a frequency where little or no RF activity is dis-played. Set both the transmitter and the receiver to this new frequency. Turn on the transmitter to ensure the RF signal is strongly indicated at the receiver.Selecting the Compatibility ModeAll Digital Hybrid receivers are capable of working with Lectrosonics MM400C transmitter, and by setting the proper Compatibility Mode, the unit will also work with 200 Series and 100 Series analog receivers, plus some other brands (contact the factory for details). In order to operate properly, the transmitter must be set to the operating mode of the matching receiver, which is easily done using a small screwdriver and a battery.The following procedure assumes that the Power ON/OFFswitchisconguredforNormalMode.Ifithas been configured for Audio Mute Mode, see Power Switch Function Selection to change the configuration to Normal Mode.Note: The unit comes from the factory in the Digital Hybrid mode.1) Set the audio controls for the corresponding re-ceiver to minimum.2) Install a good battery in the transmitter. Move the PowerSwitchtoONandobservetheModulationLEDs to determine the current Compatibility Mode. The –20 and –10 LEDs will blink simultaneously: •Oncefor100Seriesmode •Twotimesfor200Seriesmode •Threetimesfor“Other”receivers • Fourtimesfor400Seriesmode •FivetimesforIFBSeriesmode 3) MovethePowerSwitchtotheOFFposition.4) Loosen the Frequency Switch Cover Plate Retaining Screen and rotate the cover to exposetheFrequencySelectSwitches.Withasmallscrewdriver(includedwith your unit), set the Frequency Select Switches to CC. (for Change, Change). 5) Power up the unit briefly – just long enough to watch the LED’s glow and then turn Operating Instructions
MM400CLECTROSONICS, INC.12POWER LEDModulation LEDsPower On/Off SwitchNOTE:All400Series(andanumberofearlierreceivers) offer a front panel LCDs that indicate the correct transmitter switch settings when locating clear channels. Use the scanning functions on these receivers to find a clear channel, then switch both the receiver and transmitter to the Frequency Select Switch settings indicated in the receiver’s display.If you are using a 100 Series receiver, turn off the trans-mitter and observe the RF LED on the front panel of the UCR100 receiver. If it flickers, or glows red, then adjust the UCR100’s Frequency Select Switches up or down in 100kHzincrementsuntiltheRFLEDextinguishes.Setthe MM400C transmitter’s Frequency Select Switches to the same settings. Turn on the transmitter and ob-serve that the RF LED on the receiver glows brightly.Attaching a Microphone and Adjusting Audio LevelsThe front panel Modulation LEDs indicate limiter activity. (See chart.) Since the distortion introduced by the lim-iter is minimal and full modulation is assured, occasional forays into the red by the -10 LED is acceptable.1) Install a fresh battery.2) Insert the watertight microphone plug into the Mic Jack and screw it in snugly. WARNING: Do not overtighten as this will distort the “O-ring” and allow moisture to enter the unit.3) Mute the main sound system and rotate the Audio LevelControlontheMM400Ctomaximumcounter-clockwise(Off).4) SetthePowerON/OFFswitchtotheONposition.5) Position the microphone in the location where it will be used during in actual operation.6) ObservetheMM400CModulationLEDSwhilespeaking or singing into the microphone at the same voice level that will be used during the program. Gradually rotate the Audio Level Control control clockwise until both LEDs glow greenwiththe-20dBoccasionalblinkingred. This indicates full modulation and is the optimum setting for the transmitter’s gain.Signal Level -20 LED -10 LEDLessthan-20dB Off Off-20dBto-10dB Green Off-10dBto+0dB Green Green+0dBto+10dB Red GreenGreaterthan+10db Red RedNOTE:Differentvoiceswillusuallyrequiredifferentsettings of the Audio Level Control, so check this adjustment as each new person uses the system. If several different people will be using the transmitter and there is not time to make the adjustment for each individual, adjust it for the loudest voice.7) OncetheMM400C’saudiogainhasbeenset,theremaining components of the audio system can be energizedandadjusted.WARNING: The AUDIO LEVEL control should not be used to control the volume of your sound system or recorder levels. This gain adjustment matches the transmitter gain with the user’s voice level and microphone positioning.Microphone JackAudio Level Control
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 13Power Switch Function SelectionThePowerON/OFFSwitchcanalsobeusedasanau-diomuteswitch.Whenusedasanaudiomuteswitch,the power switch causes the transmitter’s audio to be mutedwhenthePowerON/OFFswitchisplacedintheOFFposition.The-10ModulationLEDblinksgreentoindicate that the transmitter is in Audio Mute Mode. Power Switch PositionFunction ON OFFNormal,or AppliesPower TurnsUnitOff Power Mode to UnitAudioMute TurnsOnAudio MutesAudio ModeIn Audio Mute Mode, the transmitter can still be turned offbytogglingthePowerON/OFFswitchrapidly.TurnthePowerSwitchONthenOFFthreetimes(endingintheOFFposition)withinvesecondstoinitiatethepoweroffsequence.ThesequenceisON-OFF-ON-OFF-ON-OFF.Whenthetransmitterispoweredupagain,AudioMuteMode will persist until the power switch function is changed.Determine Power Switch Function Mode1) If the transmitter is turned off, set the Power Switch ONandobservetheModulationLEDs.2) After the power up sequence completes, place the POWERON/OFFswitchintheOFFpositionandobserve the -10 Modulation LED.3) IfthePWRLEDglowsandthe-10ModulationLEDblinks green, the Power Switch is in Audio Mute Mode.IftheLEDsextinguish,thePowerSwitchisin Normal or Power Mode.Changing Power Switch Function1) EnsurethePowerON/OFFswitchisintheOFFposition.2) Loosen the Frequency Switch Cover Plate Retain-ing Screw, pull it away from the transmitter body, thenrotateittoexposetheFrequencySelectSwitches.3) Withasmallscrewdriver(includedwithyourunit),set the Frequency Select Switches to F,F. 4) RapidlytogglethePowerON/OFFswitchtoONthenbacktoOFF.5) Change the Frequency Select Switch settings to the following position: Normal Mode: 1,1 Audio Mute Mode: 2,2.5) RapidlytogglethePowerON/OFFswitchtoONthenbacktoOFF.6) Set the Frequency Select Switches to 0,0.7) RapidlytogglethePowerON/OFFswitchtoONthenbacktoOFF.8) Turn on the transmitter. After the powerup se-quencehascompleted,setthePowerON/OFFSwitchtoOFFandobservethe-10ModulationLEDandthePWRLED. IfthePowerON/OFFswitchisconguredforNor-mal Mode, the -10 Modulation LED will go out and thePWRLEDwillblinkredforashortperiodthengo out indicating the transmitter has shut down. IfthePowerON/OFFswitchisconguredforAudioMuteMode,thePWRLEDcontinuesto monitor battery condition while the -10 Modulation LED blinks green.Frequency Select Switches1.6M 100K
MM400CLECTROSONICS, INC.14Although the Power Switch’s Magnet Housing Assembly is designed to provide years of rugged use it may be-come inadvertently damaged or lost. Use the following procedure to install a new Magnet Housing Assembly.1) If necessary, use a nonmetallic tool such as an “orange stick” to remove the damaged Magnet Housing Assembly and clean any debris from the Magnet Housing Assembly slot. Apply a small amount of petroleum jelly or white lithium grease to the area before inserting the new magnet assembly.Warning: If you use something metallic, as illustrated in the example, use extreme caution not to scratch the finish. Breaching the finish may cause corrosion of the metal housing.2) Notice that the Magnet Housing Assembly Slot has a wide spot in the middle. Place the new Magnet Housing Assembly in the slot so that one tab is in a small groove in one side of the slot.3) Use a nonmetallic implement to snap the other side of the Magnet Housing Assembly into the slot.4) Ensure a good battery is installed, then slide the newPowerON/OFFSwitchtoONtoverifythatitisworking properly.Replacing the Power Switch Magnet Housing AssemblyMagnet Housing AssemblyFirst, center the switch in the slot in the housing so that the tabs will release through the wider openings.
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 15Some mics require RF protection to keep the radio sig-nal from affecting the capsule, even though the trans-mitter input circuitry is already RF bypassed.If the mic is wired as directed, and you are having diffi-culty with level, high noise, or poor frequency response; RF is likely to be the cause.The best RF protection is accomplished by installing RF bypass capacitors at the mic capsule. If this is not pos-sible, or if you are still having problems, capacitors can beinstalledonthemicwiresinsidetheTA5Fconnectorhousing.Install the capacitors as follows: Use 330 pF capaci-tors. Capacitors are available from Lectrosonics. Please specify the part number for the desired lead style.Microphone RF BypassingLeaded capacitors: P/N 15117Leadless capacitors: P/N SCC330PAll Lectrosonics lavaliere mics are already bypassed and do not need any additional capacitors installed for proper operation.2 WIRE MICCAPSULESHIELDAUDIOAlternate location for bypass capacitorsMICROPHONECONNECTORPreferred location for bypass capacitors
MM400CLECTROSONICS, INC.16Part/Model # Description26486 Replacement wire belt clip21357 Non-watertight audio input plugWPMC-3 Watertightplugkit-3piecesWMPC-10 Watertightplugkit-10piecesP1201-1 Switch Magnet Housing AssemblyReplacement Parts and AccessoriesUHF Transmitter Antenna SpecificationsAll Lectrosonic UHF transmitter antennas follow the color code specifications in the chart below to identify operating frequency block range. The frequency block range is labeled on the ouside housing for each indi-vidual transmitter. FREQUENCY CAP ANTENNA BLOCK RANGE COLOR WHIP LENGTH  470 470.100-495.600 Black 5.37” 19 486.400-511.900 Black 5.16” 20 512.000-537.500 Black 4.98” 21 537.600-563.100 Brown 4.74” 22 563.200-588.700 Red 4.48” 23 588.800-614.300 Orange 4.24” 24 614.400-639.900 Yellow 4.01” 25 640.000-665.500 Green 3.81” 26 665.600-691.100 Blue 3.62” 27 691.200 - 716.700 Violet (Pink) 3.46” 28 716.800 - 742.300 Grey 3.31” 29 742.400-767.900 White 3.18”4701920212223242526272829Lay the transmitter on this template to determine the frequency block of the antenna. Remove the colored cap for accurate measurement.
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 17Beforegoingthroughthefollowingchart,besurethatyouhaveagoodbatteryinthetransmitter.Itisimportantthatyou follow these steps in the sequence listed.SYMPTOM POSSIBLE CAUSE 1) Batteryisinsertedbackwards.  2) Batteryisdead.  3) PowerON/OFFswitchconguredtoNormalModeandis    settoOFF.  1) VerifyTransmitterPWRLEDisglowing. 2) Gain control turned all the way down. 3) Mic capsule is damaged or malfunctioning. 4) Mic cable damaged or mis-wired.  1) PowerON/OFFSwitchisconguredforAudioMuteModeand    theswitchisintheOFF,ormuteposition.(SeeControls and Functions.) 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.    Checkswitches/displayontransmitterandreceiver.  5) Operatingrangeistoogreat. 1) Receiver output level set too low. 2) Receiver output is disconnected; cable is defective or connectors not wired correctly. 3) Sound system or recorder input is turned down.  4) Receiver/Transmittercompatibilitymodemismatched.  5) Transmitteraudiomuted. 1) Transmitter gain (audio level) is far too high. Check Modulation LEDs on transmitter and receiver as it is being used. (See Operating Instructions, Attaching a Microphone and Adjusting Audio Levels.) 2) Receiver output may be mismatched with the sound system or recorder input. Adjust output level on receiver to the correct level    fortherecorder,mixerorsoundsystem.  3) Excessivewindnoiseorbreath“pops.”Repositionmicrophone    and/orusealargerwindscreen. 4) Transmitter is not set to same frequency as receiver. Check that frequency select switches on receiver and transmitter match.  5) Receiver/Transmittercompatibilitymodemismatched. 1) Transmitter gain (audio level) far too low. 2) Receiver antenna missing or obstructed.  3) Operatingrangetoogreat.CheckRFlevelonreceiverindicator. 1) Transmitter gain (audio level) too high. 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.TroubleshootingTRANSMITTER PWR LED OFFNO TRANSMITTER MODULATION LEDs-10 MODULATION LED IS BLINKING GREEN AND RECEIVER HAS NO AUDIO RECEIVER INDICATES NO RF NO SOUND (OR LOW SOUND LEVEL), RECEIVER INDICATES PROPER AUDIO MODULATION DISTORTED SOUND HISS AND NOISE -- AUDIBLE DROPOUTS EXCESSIVE FEEDBACK
MM400CLECTROSONICS, INC.18Operating frequencies: Block 470 470.100 - 495.600 Block 19 486.400 - 511.900 Block 20 512.000 - 537.500 Block 21 537.600 - 563.100 Block 22 563.200 - 588.700 Block 23 588.800 - 607.900 and 614.100 - 614.300 Block 24 614.400 - 639.900 Block 25 640.000 - 665.500 Block 26 665.600 - 691.100 Block 27 691.200 - 716.700 Block 28 716.800 - 742.300 Block 29 742.400 - 767.900Frequency selection: 256 frequencies in 100 kHz steps RF Power output: 100 mW (nominal)Pilot tone: 25 to 32 kHz; 5 kHz deviation (in 400 Series Mode)Frequency stability: ± 0.002%Deviation: ± 75 kHz max. (in 400 Series Mode)Spurious radiation: 60 dB below carrierEquivalent input noise: –118 dBV, A-weightedInput level: Nominal 2 mV to 300 mV, before limiting. Greater than 1.5V maximum, with limiting.Input impedance: 2 kOhmInput limiter: Soft limiter, >30 dB rangeGain control range: 43 dB; semi-log rotary controlModulation indicators: Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referenced to full modulation.Low frequency roll-off: –12 dB/octave; 70 HzSpecifications and FeaturesThe FCC requires that the following statement be included in this manual:ThisdevicecomplieswithFCCradiationexposurelimitsassetforthforanuncontrolledenvironment. This device should be installed and operated so that its antenna(s) are not co-located or operating in conjunction with any other antenna or transmitter.Emission Designator: 180KF3ESpecifications subject to change without notice. Controls: Front panel knob adjusts audio gain. Rotary switches on bottom panel adjust transmitter frequency.Audio Frequency Response: 80 Hz to 20 kHz, +/-1dB, -3 dB @ 70 Hz (The audio is deliberately rolled off at 70 Hz using a 12 dB/octave filter. This filter cannot be disabled.)Signal to Noise Ratio (dB):(overall system, 400 Series mode) Total Harmonic Distortion: 0.2% typical (400 Series mode)Audio Input Jack: 2.5 mm Microjack (matches Switchcraft 850 Microplug)Antenna: Detachable, flexible galvanized steel with SMA connector. (50 Ohm antenna port also allows connection to test equipment.)Battery: 1.5 Volt AA lithium recommendedBattery Life: 1.75 hours (alkaline); over 6 hours (lithium); 3.5 hours (2200 mAhr) NiMHWeight: 3.6 ozs. (102 grams) with lithium battery, no antennaOverall Dimensions: 3.03 x 2 x 0.69 inches (not including microphone or antenna)(Note: the dual envelope “soft” limiterprovidesexceptionally good handling of transients using variable attack and release time constants. The gradual onset of limiting in the design begins below full modulation, which reduces the measured figure for SNR without limitingby4.5dB)SmartNR No Limiting w/LimitingOFF 103.5 108.0NORMAL 107.0 111.5FULL 108.5 113.0
Watertight Miniature UHF Belt-Pack TransmitterRio Rancho, NM 19Service and RepairIf your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check the interconnect-ing cables and then go through the Troubleshooting section in this manual.Westronglyrecommendthatyoudo not try to repair the equipment yourself and do not have the local repair shop attempt 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set at 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aremadeatnochargeinaccordancewiththetermsofthewarranty.Out-of-warrantyrepairsarechargedatamodestflat rate plus parts and shipping. Since it takes almost as much time and effort to determine what is wrong as it does tomaketherepair,thereisachargeforanexactquotation.Wewillbehappytoquoteapproximatechargesbyphonefor out-of-warranty repairs.Returning Units for RepairFor timely service, please follow the steps below:A. DONOTreturnequipmenttothefactoryforrepairwithoutrstcontactingusbyemailorbyphone.Weneedtoknowthenatureoftheproblem,themodelnumberandtheserialnumberoftheequipment.Wealsoneedaphone number where you can be reached 8 A.M. to 4 P.M. (U.S. Mountain Standard Time).B. Afterreceivingyourrequest,wewillissueyouareturnauthorizationnumber(R.A.).Thisnumberwillhelpspeedyourrepairthroughourreceivingandrepairdepartments.Thereturnauthorizationnumbermustbeclearlyshownon the outside of the shipping container.C. Pack the equipment carefully and ship to us, shipping costs prepaid. If necessary, we can provide you with the properpackingmaterials.UPSisusuallythebestwaytoshiptheunits.Heavyunitsshouldbe“double-boxed”forsafe transport.D. Wealsostronglyrecommendthatyouinsuretheequipment,sincewecannotberesponsibleforlossofordam-agetoequipmentthatyouship.Ofcourse,weinsuretheequipmentwhenweshipitbacktoyou.Lectrosonics USA:Mailing address: Shipping address: Telephone: Lectrosonics,Inc.  Lectrosonics,Inc.  (505)892-4501 POBox15900  581LaserRd.   (800)821-1121Toll-free RioRancho,NM87174 RioRancho,NM87124 (505)892-6243Fax USA USA Web: E-mail: www.lectrosonics.com sales@lectrosonics.comLectrosonics Canada:Mailing Address: Telephone: E-mail: 49SpadinaAvenue,  (416)596-2202  Sales: colinb@lectrosonics.com Suite303A   (877)753-2876Toll-free Service:joeb@lectrosonics.com Toronto,OntarioM5V2J1 (877-7LECTRO)     (416)596-6648Fax
8 April 2008581 Laser Road NE • Rio Rancho, NM 87124 USA • www.lectrosonics.com(505) 892-4501 • (800) 821-1121 • fax (505) 892-6243 • sales@lectrosonics.comLIMITED 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.

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