Lectrosonics SM BODY WORN WIRELESS MICROPHONE TRANSMITTER User Manual mm400aman

Lectrosonics Inc BODY WORN WIRELESS MICROPHONE TRANSMITTER mm400aman

USERS MANUAL

1Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USADIGITAL HYBRID WIRELESSTMULTRA-MINIATUREUHF BELT-PACK TRANSMITTEROPERATING INSTRUCTIONSSMRio Rancho, NMwww.lectrosonics.comProfessional Audio Products Since 1971
2SMProfessional Audio Products Since 1971The SM transmitter is FCC type accepted under Part 74: 536-608 MHz and 614-806 MHz
3Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USATABLE OF CONTENTSGENERAL TECHNICAL DESCRIPTION ...................................................................................................... 4GENERAL ...................................................................................................................................................................... 4DIGITAL HYBRID WIRELESS™ TECHNOLOGY .......................................................................................................... 4NO PRE-EMPHASIS/DE-EMPHASIS ............................................................................................................................ 4LOW FREQUENCY ROLL-OFF ..................................................................................................................................... 5INPUT LIMITER .............................................................................................................................................................. 5DIGITAL SIGNAL PROCESSOR .................................................................................................................................... 5MICROPROCESSOR, PLL AND VCO CIRCUITS ........................................................................................................ 5COMPATIBILITY MODES ............................................................................................................................................... 5PILOT TONE SQUELCH ................................................................................................................................................ 5CONTROL PANEL .......................................................................................................................................................... 5WIDE-BAND DEVIATION ............................................................................................................................................... 5BATTERY LIFE ............................................................................................................................................................... 5FREQUENCY AGILITY .................................................................................................................................................. 5CIRCULATOR/ISOLATOR .............................................................................................................................................. 5CONTROLS AND FUNCTIONS .................................................................................................................... 6LCD SCREEN ................................................................................................................................................................ 6PWR LED ....................................................................................................................................................................... 6AUDIO INPUT JACK ...................................................................................................................................................... 6MODULATION LEDS ...................................................................................................................................................... 6AUDIO BUTTON ............................................................................................................................................................. 6FREQ BUTTON .............................................................................................................................................................. 6UP/DOWN ARROWS ..................................................................................................................................................... 7ANTENNA ...................................................................................................................................................................... 7BATTERY COMPARTMENT AND THUMB SCREW ..................................................................................................... 7SM SCREEN SELECTIONS .......................................................................................................................... 8FREQUENCY SCREEN ................................................................................................................................................. 8AUDIO SCREEN ............................................................................................................................................................ 8COMPATIBILITY MODE SCREEN ................................................................................................................................. 8LOCK/UNLOCK SCREEN .............................................................................................................................................. 8POWER OFF TIMER SCREEN ...................................................................................................................................... 8BATTERY INSTALLATION ............................................................................................................................ 9OPERATING INSTRUCTIONS .................................................................................................................... 10POWER UP AND BOOT SEQUENCE ......................................................................................................................... 10POWER DOWN ............................................................................................................................................................ 10SELECTING THE COMPATIBLITY MODE .................................................................................................................. 10SETTING TRANSMITTER OPERATING FREQUENCY ............................................................................................. 11ATTACHING A MICROPHONE AND ADJUSTING GAIN ............................................................................................ 11LOCKING OR UNLOCKING THE CONTROL PANEL ................................................................................................. 12OPERATING NOTES ................................................................................................................................... 125-PIN INPUT JACK WIRING ....................................................................................................................... 13MICROPHONE RF BYPASSING ................................................................................................................................. 13LINE LEVEL SIGNALS ............................................................................................................................................ 14WIRING HOOKUPS FOR DIFFERENT SOURCES .............................................................................................. 14TROUBLESHOOTING ................................................................................................................................. 15SPECIFICATIONS AND FEATURES .......................................................................................................... 16SERVICE AND REPAIR ............................................................................................................................... 17RETURNING UNITS FOR REPAIR ............................................................................................................. 18LIMITED ONE YEAR WARRANTY .............................................................................................................. 20Thank you for selecting the Lectrosonics SM ultra-miniature transmitter. The unique design provides several distinctfeatures for professional applications:• Outstanding RF operating range• Superb audio quality• Ultra-lightweight, corrosion resistant housing• Water resistant seals for use in damp environments• Programmable compatibility modes for maximum versatilityThe Digital Hybrid WirelessTM design (US Patent Pending) combines 24-bit digital audio with analog FM techniquesresulting a system that has the same operating range as analog systems (plus the graceful failure at the limits of thatrange), the same spectral efficiency as analog systems, the same long battery life as analog systems, with theexcellent audio found in digital systems.The SM uses a standard Lectrosonics 5-pin type input jack for use with electret lavaliere mic, dynamic mic, or linelevel signals. A water resistant control panel with LCD, membrane switches and multi-color LEDs make input gainadjustments and frequency and compatibility mode selection quick and accurate, without having to view the receiver.The battery compartment accepts an AA alkaline, lithium or NiMH battery. Plus, the SM is machined from a solidaluminum block to provide an extremely lightweight and rugged package. A special non-corrosive finish (the sameone used on NASA space vehicles) resists salt water exposure and perspiration in extreme environments.The DSP-based design offers backward compatibility with Lectrosonics 100 and 200 Series receivers, and someother brands of analog wireless receivers. Only the SM transmitter is covered in this manual. Companion receiversare covered in separate manuals.
4SMProfessional Audio Products Since 1971SMBlock DiagramPhase Locked LoopVoltageControlledOscillator11001001A-DConverterDigital Signal Processor11001001D-AConverterShuntLimiterBicolorModulationLEDsMicroprocessor1.5VBatterySwitchingPowerSupply+3.3v+1.8v+6v-3vServo BiasSupplyAudioEncodedAudio andPilot ToneReferenceCrystalBicolorPowerLEDMicJackBiasVoltage0, 2 or 4 VoltsAudioLevelInputAmp54321FinalAmplifier 50OhmsIsolatorControl PanelUp/DownSwitchesFreqSwitchAudioSwitchLCDHi/LoPassFilter+6vDigitalPot*US Patent PendingGENERALThe 400 system uses ±75 kHz wide deviation for anextremely high signal to noise ratio. Switching powersupplies provide constant voltages to the transmittercircuits from the beginning (1.5 Volts) to the end (0.85Volts) of battery life, and an ultra low noise op amp isused as the input amplifier for quiet operation. It is gainprotected with a wide range dual envelope input limiterwhich cleanly limits input signal peaks over 30 dB abovefull modulation.NoteThe terms 400 Series and Digital Hybrid Wireless™ describe thesame product line and are interchangeable.DIGITAL HYBRID WIRELESS™TECHNOLOGY*All wireless links suffer from channel noise to somedegree, and all wireless microphone systems seek tominimize the impact of that noise on the desired signal.Conventional analog systems use compandors forenhanced dynamic range, at the cost of subtle artifacts(known as “pumping” and “breathing”). Wholly digitalsystems defeat the noise by sending the audio informa-tion in digital form, at the cost of some combination ofpower, bandwidth and resistance to interference.Lectrosonics Digital Hybrid Wireless™ systems over-come channel noise in a dramatically new way, digitallyencoding the audio in the transmitter and decoding it inthe receiver, yet still sending the encoded information viaan analog FM wireless link. This proprietary algorithm isnot a digital implementation of an analog compandor butGENERAL TECHNICAL DESCRIPTIONa technique that can be accomplished only in the digitaldomain, even though the inputs and outputs are analog.Channel noise still impacts received signal quality andwill eventually overwhelm a receiver. Digital HybridWireless™ simply encodes the signal to use a noisychannel as efficiently and robustly as possible, yieldingaudio performance that rivals that of wholly digitalsystems, without the power and bandwidth problemsinherent in digital transmission.Because it uses an analog FM link, Digital HybridWireless™ enjoys all the benefits of conventional FMwireless systems, such as excellent range, efficient useof RF spectrum, and resistance to interference. How-ever, unlike conventional FM systems, it does away withthe analog compandor and its artifacts.NO PRE-EMPHASIS/DE-EMPHASISThe Digital Hybrid Wireless™ design results in a signal-to-noise ratio high enough to preclude the need forconventional pre-emphasis (HF boost) in the transmitterand de-emphasis (HF roll off) in the receiver.LOW FREQUENCY ROLL-OFFA 12 dB per octave low frequency roll-off is provided inthe audio section, with the -3 dB point at 70 Hz. Theactual roll-off frequency will vary somewhat according tothe low frequency response of the mic capsule beingused.The low frequency roll-off is used to remove subsonic (orvery low frequency) audio, often produced by air condi-tioning systems, automobile traffic and other sources
5Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USAfrom the audio signal. Excessive low frequency contentin the audio input can cause a variety of audio problemsincluding driving the transmitter into limiting.INPUT LIMITERA digitally-controlled analog audio limiter is employedjust before the analog-to-digital converter. The limiterhas a range of more than 30 dB for excellent overloadprotection. A dual release envelope makes the limiteracoustically transparent while maintaining low distortion.It can be thought of as two limiters in series, connectedas a fast attack and release limiter followed by a slowattack and release limiter. The limiter recovers quicklyfrom brief transients, so that its action is hidden from thelistener, but recovers slowly from sustained high levels,to both keep audio distortion low and preserve shortterm dynamic changes.Two bicolor LEDs indicate limiter activity. (See OperatingInstructions, Adjusting Audio Levels.)DIGITAL SIGNAL PROCESSORThe DSP encodes the digitized audio from the A-DConverter and adds an ultrasonic Pilot Tone to controlthe receiver's squelch (only in 400 Series, 200 Seriesand IFB Compatibility Modes with the Pilot Tone enabled– see Pilot Tone Squelch).MICROPROCESSOR, PLL AND VCOCIRCUITSAn 8-bit microprocessor monitors user command inputsfrom the Control Panel buttons and numerous otherinternal signals. It works intimately with the DSP toensure the audio is encoded according to the selectedCompatibility Mode and the correct pilot tone is added tothe endocded signal. (See Pilot Tone Squelch.) It alsodrives the LCD display, controls the Pilot Tone, operatesthe PLL/VCO circuits.COMPATIBILITY MODESThe SM transmitter was designed to be compatible withLectrosonics 400 Series receivers and will yield the bestperformance when doing so. However, due to theflexibility of digital signal processing, the SM is also ableto operate with Lectrosonics 200 Series, Lectrosonics100 Series, IFB and certain non-Lectrosonics receiversin special compatibility modes. (Contact theLectrosonics Sales Department for a complete list ofcompatible receivers.)PILOT TONE SQUELCHThe Digital Hybrid Wireless™ system uses one of 256different ultrasonic tones between 25 and 32 kHz, thatmodulate the carrier to operate the receiver squelch.The pilot tone frequency is chosen according to which ofthe 256 channels has been selected via the ControlPanel mounted FREQ switch. (See SM Screen Selec-tions.) The pilot tone squelch system ensures thereceiver will remain muted until it receives the pilot tonefrom the matching transmitter, even if a strong RF signalis present on the carrier frequency of the system. 400Series Compatibility Mode extends this concept evenfurther by insuring that all transmitters in a system havedifferent pilot tone frequencies so that even spurious RFfrom the wrong transmitters can’t open the receiversquelch.CONTROL PANELA waterproof control panel which includes four mem-brane switches and an LCD screen is used to changeand control the operational settings, and also provide avisual feedback of overall system operation. (SeeControls and Functions.)WIDE-BAND DEVIATIONA ±75 kHz deviation improves the capture ratio, signal tonoise ratio and AM rejection of a wireless systemdramatically, compared to other designs that use 30 kHzto 40 kHz deviation. This combined with a full 100 mWof power output makes a significant improvement insignal to noise ratio and maximum operating range.BATTERY LIFESwitching power supplies throughout the design allowabout 4.5 hours of operation using a single AA lithiumbattery. An alkaline AA battery provides about 2 hours,and a NiMH AA battery provides about 3.5 hours ofoperation. The battery contacts are spring loaded toprevent “rattle” as the unit is handled.FREQUENCY AGILITYThe transmitter section uses a synthesized, frequencyselectable main oscillator. The frequency is extremelystable over a wide temperature range and over time.Two membrane switches, located on the Control Panel,provide 256 frequencies in 100 kHz steps over a 25.5MHz range.CIRCULATOR/ISOLATORThe RF output circuit includes a one way circulator/isolator using a magnetically polarized ferrite. Thisdevice greatly reduces RF intermodulation producedwhen multiple transmitters are used at separations ofless than five feet. It also provides additional RF outputstage protection but is rarely seen in a wireless micro-phone transmitter due to its high cost.
6SMProfessional Audio Products Since 1971CONTROLS AND FUNCTIONSLCD SCREENThe LCD is a numeric-type Liquid Crystal Display usedin conjunction with the AUDIO and FREQ buttons, andthe UP and Down arrows, to configure the SM. (See SMSCREEN SELECTIONS.) It is also used with theModulation and PWR LEDs to monitor system operation.PWR LEDThe PWR LED glows green when the battery is good.The color changes to red when there is about 30 min-utes of operation left with the recommended lithiumbattery. (An alkaline battery will have about 20 minutesof life left.) When the LED begins to flicker red, there areonly a few minutes of life.NoteA NiMH battery will give little or no warning when it is depleted. Ifyou wish to use NiMH batteries in the SM, we recommend tryingfully charged batteries in the unit, noting the length of time that thebatteries will run the unit and then using the battery timer featureavailable on most 400 Series receivers.A weak battery will sometimes cause the PWR LED toglow green immediately after being put in the unit, butwill soon discharge to the point where the LED will gored or shut off completely.AUDIO INPUT JACKThe input on the SM accommodates virtually everylavaliere, hand-held or shotgun microphone available.Different line level signals can also be accommodated.(See LINE LEVEL SIGNALS and 5-PIN INPUT JACKWIRING.)MODULATION LEDSThe Modulation LEDs provide a visual indication of theinput audio signal level from the microphone. These twobicolor LEDs can glow either red or green to indicatemodulation levels.AUDIO BUTTONPressing the AUDIO button alone causes the LCD todisplay the audio level setting (0 dB to 44 dB). This levelis adjustable via the Up and Down arrows.Simultaneously pressing the AUDIO button and FREQbutton will power the transmitter on or off.FREQ BUTTONThe SM provides 256 individual frequencies, in 100 kHzincrements, across a 25.5 MHz frequency block. TheFREQ Button toggles the LCD between displaying theactual operating frequency in MHz or a two-digit hexa-decimal number that corresponds to the equivalentLectrosonics Frequency Switch Setting.Signal LevelLess than -20 dB-20 dB to -10 dB-10 dB to +0 dB+0 dB to +10 dBGreater than +10 dB-20 LED -10 LEDOffGreenGreenRedRedOffOffGreenGreenRedUp/Down ButtonsFreq ButtonAudio ButtonPWR LEDModulation LEDs-10-20LCDBattery CompartmentThumb ScrewBattery CompartmentCover PlateAudio Input JackAntenna
7Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USASimultaneously pressing the FREQ button and AUDIObutton will power the transmitter on and off.UP/DOWN ARROWSThe Up and Down arrows are used to select the operat-ing frequency, adjust the audio level, or set the Compat-ibility Mode.Pressing both arrows simultaneously locks the controlpanel buttons so they can only be used to displaycurrent settings. A capital “L” appears in the display toindicate the controls are locked.To unlock the control panel, press both arrows again.“unL” appears in the display to indicate that the controlpanel is unlocked.The lock status, locked or unlokced, is preserved even ifthe unit is shut off.ANTENNAThe fixed flexible cable antenna is supplied with thetransmitter. This antenna is cut to the 1/4 wavelength ofthe center of the frequency block (the frequency range)of the transmitter.BATTERY COMPARTMENT AND THUMBSCREWThe large knurled brass thumbscrew is used to releaseor secure the Battery Compartment Cover Plate, allow-ing access to the battery.
8SMProfessional Audio Products Since 1971SM SCREEN SELECTIONSFive screens are used to set up and operate the SM.These screens are used to set the operating frequency,adjust the audio modulation level, select the Compatibil-ity Mode, lock or unlock the control panel and powerdown the transmitterFREQUENCY SCREENThe Frequency Screen displaysthe operating frequency in MHzwhen the system is initiallyturned on. Pressing the FREQbutton displays the operatingfrequency as a two-digit hexa-decimal number that corre-sponds to the equivalent Lectrosonics Frequency SwitchSetting.AUDIO SCREENPressing the AUDIO buttonduring normal operation displaysthe current audio input levelsetting.COMPATIBILITY MODE SCREENHolding down the Up arrow button while powering up theSM opens the CompatibilityMode screen. By using the Upor Down arrow buttons, the usercan select one of five compatibil-ity modes:•400 - This is the factory default setting and workswith all Lectrosonics 400 Series Digital HybridWireless™ receivers. This mode offers the bestaudio quality.•200 - This mode works with all Lectrosonics 200Series compatible receivers.•100 - This mode works with all Lectrosonics 100Series compatible receivers.644.400CH 2CAud 12CP 400•3 - (Mode 3) This mode works with a number ofnon-Lectrosonics analog receivers. Contact thecompany for a list of compatible receivers.•IFB - This mode works with all Lectrosonics IFBcompatible receivers.Pressing either the AUDIO or FREQ button leaves thisscreen and accesses the screen associated with thebutton that was pushed.LOCK/UNLOCK SCREENSimultaneously pressing both theUp and Down arrow buttonsduring normal operation togglesbetween locking and unlockingthe front panel controls. (If thecontrol panel was locked whenthe buttons are pushed, it willtoggle to the unlocked condition.)The LCD will display the Locked/Unlocked conditionwhile the arrow buttons are pressed, then revert back tothe previous screen when either button is released.While the AUDIO and FREQ buttons can be used todisplay current settings, any attempt to change a settingby pressing either the Up or Down arrow button when theControl Panel is locked will temporarily display an “L” inthe LCD.POWER OFF TIMERSCREENSimultaneously holding theAUDIO and FREQ buttons whilethe unit is operating displays thePower Off Timer screen. Thescreen counts down from threeto zero. Releasing either buttonprior to the Power Off Timerscreen indicating zero returnsthe unit to normal operation anddisplays the previous screen.The unit turns off only when the Power Off Timerreaches zero and the AUDIO and FREQ buttons arereleased.LunLControl Panel LockedControl Panel UnlockedoFF . . .3Initial Power Off TimerScreenEnd Power Off TimerScreenoFF . . .0LCD
9Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USAThe transmitter is powered by a standard AA 1.5 voltbattery. We recommend using lithium battery for longestlife. Lithium batteries provide over 4.5 hours of operationat room temperature.NoteStandard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not adequate.The battery status circuitry is designed for the voltagedrop over the life of lithium batteries.To install a new battery:1. Turn the Battery Cover Plate Thumbscrewcounter-clockwise, open the batterycompartment and remove any old battery.2. Insert the new battery into the SM housing.Take note of the polarity marked on the caseshowing the location of the positive (+) andnegative (-) terminals. The positive (+) batteryterminal goes into the transmitter first.3. Replace the Battery Cover Plate and tightenthe Battery Cover Plate Thumbscrew.BATTERY INSTALLATIONAA BatteryBatteryCompartment BatteryCover PlateThumbscrewBatteryCover Plate
10SMProfessional Audio Products Since 1971with 200 Series, 100 Series and IFB analog receivers,plus some other analog wireless receivers (contact thefactory for details). Setting the Compatibility Mode of thetransmitter to match the receiver is easily done via theControl Panel.NoteThe unit comes from the factory configured as a 400 Seriestransmitter.1) Set the receiver’s audio controls to minimum.2) Power up the SM and observe the BootSequence. If the Compatibility Mode for theSM does not match the correspondingreceiver, then power off the SM transmitter.3) From a power off condition, hold down the Uparrow, then simultaneously press the AUDIOand FREQ buttons.4) The LCD will display the current CompatibilityMode. Use the Up or Downarrow buttons to reset theCompatibility Mode tomatch the correspondingreceiver.The following CompatibilityModes are available:• 100 Series mode: CP 100• 200 Series mode: CP 200• Mode 3 (Contact dealer for details): CP 3• 400 Series mode: CP 400• IFB Series mode: CP IFB5) Press the AUDIO or FREQ to exit this function.The Compatibility Mode selected in Step 4 willbe the current Compatibility Mode until resetusing this procedure.SETTING TRANSMITTER OPERATINGFREQUENCYThe Operating Frequency of the SM can be displayedeither in MHz or as a two-digit hexadecimal number.POWER UP AND BOOT SEQUENCE1) Ensure that a good battery is installed in theunit. (See Battery Installation.)2) Simultaneously press the AUDIO and FREQbuttons. As the unit turns on, the ModulationLEDs and PWR LED all glow red, then they allglow green. Then, they revert to normaloperation, i.e., the Modulation LEDs glowaccording to the AUDIO level setting and thePWR LED glows green (providing the batteryis in good condition).The LCD displays a bootup sequence whichconsists of four screens:Company Name: LectroFrequency Block (bXX) andFirmware Version (rX.X): b21r1.1 (typ)Compatibility Mode: CP 400 (typ)Frequency: 550.300 (typ)POWER DOWN1) Simultaneously press andhold the AUDIO and FREQbuttons while observingthat the word “Off” appearsin the LCD along with acounter.2) When the counter reaches“0”, release the AUDIO andFREQ buttons to turn offthe unit.NoteIf the AUDIO and FREQ buttons are released before the counterreaches “0,” the unit will not turn off. Instead, it will stay energizedand the display will return to the previous screen.SELECTING THE COMPATIBLITY MODEAll Digital Hybrid Wireless™ receivers are capable ofworking with the Lectrosonics SM transmitter. By select-ing the proper compatibility mode, the SM will also workOPERATING INSTRUCTIONSoFF . . .3Initial Power Off TimerScreenEnd Power Off TimerScreenoFF . . .0AUDIO ButtonLCDFREQ ButtonModulation LEDsPWR LEDControl PanelAUDIO ButtonLCDFREQ ButtonUP ArrowCP 400400 Series or DigitalHybrid Wireless™Compatibility Mode
11Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USA(See Controls and Functions, Frequency Screen.) Usethe following procedure to change the Operating Fre-quency of the SM transmitter:1) If the LCD is displaying something other thanthe Frequency Screen, press the FREQ buttonon the SM Control Panel to enter theFrequency Screen.NoteThe default is to display the operating frequency in MHZ. Pressingthe FREQ button again displays the operating frequency as a two-digit hexadecimal number that corresponds the equivalentLectrosonics Frequency Switch Setting.2) Use the Up or Down arrow buttons to movethe operating frequency up or down in 100kHz increments from the current setting.NoteThe operating frequency displayed on the LCD wraps as it reachesthe upper or lower end of its range. Thus, if you intend to move theoperating frequency from the lower end of the range to the upperend, it may be faster to do this by using the Down arrow until thefrequency wraps to the upper end.Most Lectrosonics receivers indicate theoperating frequency both in MHz and as a twodigit hexadecimal number.This conforms to theLectrosonics tradition ofsetting the operatingfrequency using two 16-position rotary switches.The SM offers the ability toset the operating frequencyin a smililar manner.Pressing the FREQ buttonwhile the LCD displays theoperating frequency in MHzwill change the display toshow the equivalent two-digit hexadecimalfrequency select switch setting. Simply usethe Up or Down arrow to increase or decreasethe operating frequency. Pressing the FREQbutton will toggle the display back to MHz.ATTACHING A MICROPHONE ANDADJUSTING GAINThe front panel Modulation LEDs indicate limiter activity.(See chart below.) Once set, the transmitter’s audiolevel setting should not be used to control the volume ofyour sound system or recorder levels. This gain adjust-ment matches the transmitter gain with the microphone’soutput level, the user’s voice level and the microphone’sposition.NoteDifferent voices will usually require different settings of the AUDIOcontrol, so check this adjustment as each new person uses thesystem. If several different people will be using the transmitter andthere is not time to make the adjustment for each individual, adjust itfor the loudest voice.1) Mute the main sound system, then insert themicrophone plug into the input jack, aligningthe pins and ensuring that the connectorlocks.2) Turn on the transmitter and press the AUDIObutton. (It is not necessary to wait until theBoot Sequence is complete before pressingthe AUDIO button.)3) Position the microphone in the location whereit will be used in actual operation.4) Observe the SM Modulation LEDs whilespeaking or singing into the microphone at thesame voice level that will be used during theprogram. Press the Up or Down arrow buttonsuntil the both the -20 and -10 LEDs glowgreen, with the -10 LED occassionallyflickering red. (-10 dB to +0 dB Signal LevelLCDFREQ ButtonUp and DownArrow ButtonsCH 2CFrequency displayed astwo-digit hexadecimalnumber644.400Frequency displayed inMHz AUDIO ButtonLCDUp and DownArrow ButtonsModulation LEDsAudio Input Jack
12SMProfessional Audio Products Since 1971as show in the chart below with onlyoccassional forays into the +0 dB to +10 dBrange.)Setting the audio level to high reduces the dynamicrange of if the audio signal. Setting the audio levelto low may cause hiss and noise in the audio.5) Once the SM’s audio gain has been set, theremaining components of the audio systemcan be energized and adjusted.LControl Panel LockedLOCKING OR UNLOCKING THE CONTROLPANELThe Lock/Unlock function insures against unwantedoperational changes to the SM during normal operation.NoteThe Locked/Unlocked status is non-volitile and is preserved even ifthe unit is turned off.1) Ensure the SM setup is complete (operatingfrequency, Compatibility Mode, audio level,etc.).2) Simultaneously press boththe Up and Down arrowbuttons. An “L” isdisplayed on the LCD.The LCD will return to theprevious display when these buttons arereleased.3) To Unlock the ControlPanel, repeat Step 4. A“unL” is displayed on theLCD.unLControl Panel UnlockedSignal LevelLess than -20 dB-20 dB to -10 dB-10 dB to +0 dB+0 dB to +10 dBGreater than +10 dB-20 LED -10 LEDOffGreenGreenRedRedOffOffGreenGreenRed
13Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USAelectret microphones provided the microphonehas its own built-in battery.PIN 4 Bias voltage selector for Pin 3. Pin 3 voltage (0,2 or 4 volts) depends on Pin 4 connection.Pin 4 tied to Pin 1: 0 VPin 4 Open: 2 VPin 4 to Pin 2: 4 VPIN 5 High impedance, line level input for tape decks,mixer outputs, musical instruments, etc.MICROPHONE RF BYPASSINGSome mics require RF protection to keep the radio signalfrom affecting the capsule, even though the transmitterinput circuitry is already RF bypassed (see schematicdiagram).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 pins 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 lavaliere mics are already bypassed anddo not need any additional capacitors installed for properoperation.LINE LEVEL SIGNALSThe normal hookup for line level signals is: Signal Hotto pin 5, Signal Gnd to pin 1 and pin 4 jumped to pin 1.This allows signal levels up to 3V RMS to be appliedwithout limiting.The wiring diagrams included in this section representthe basic wiring necessary for the most common typesof microphones and other audio inputs. Some micro-phones may require extra jumpers or a slight variationon the diagrams shown.It’s virtually impossible to keep completely up to date onchanges that other manufacturers make to their prod-ucts. It is possible that you may encounter a microphonethat differs from these instructions. If this occurs pleasecall our toll-free number listed under Service and Repairin this manual or visit our web site at:http://www.lectrosonics.comWhen used on a wireless transmitter, the microphoneelement is in the proximity of the RF coming from thetransmitter. The nature of electret microphones makesthem sensitive to RF, which can cause problems with themicrophone/transmitter compatibility. If the electretmicrophone is not designed properly for use with wire-less transmitters, it may be necessary to install a chipcapacitor in the mic capsule or connector to block the RFfrom entering the electret capsule. (See RF Bypassing.)The Audio Input Jack for the SM is wired as shownbelow:PIN 1 Shield (ground) for positive biased electretlavaliere microphones. Shield (ground) fordynamic microphones and line level inputs.PIN 2 Bias voltage source for positive biased electretlavaliere microphones.PIN 3 Low impedance microphone level input fordynamic microphones. Also accepts hand-held5-PIN INPUT JACK WIRING3 WIRE MIC2 WIRE MICCAPSULE CAPSULESHIELDAUDIOSHIELDAUDIOBIASAlternate locations for bypass capacitorsTA 5 FCONNECTORTA 5 FCONNECTORPreferred locations for bypass capacitorsSM Equivalent Input Circuit Wiring10k1k54321To Virtual GroundAudio AmplifierBIASMICSOURCE LOADLINE INGND+30uF+6 VDCServo BiasPin 4 to Pin 1 = 0 V Pin 4 Open = 2 VPin 4 to Pin 2 = 4 V+To Limiter Control30uF750 Ohm100 Ohm2.7K200 Ohm+3.3uFAudio Input Jack
14SMProfessional Audio Products Since 1971312DYNAMICMIC LEVEL12345321PIN PINSHIELDSHIELDTIPPIN54321SLEEVELINE LEVELRCA or 1/4 " PLUG12345PINPIN54321SHIELDAUDIOSHIELDAUDIOBIAS3 WIRE ELECTRET MICPOSITIVE BIAS4 V BIAS SHOWN12345TA5FPLUG2 WIRE ELECTRET MICPOSITIVE BIAS4 V BIAS SHOWNAUDIODynamic LO Z mic or electret withmanufacturer’s power supply.12345TA5FPLUG12345TA 5 FPLUG12345TA 5 FPLUG(DISCONNECT JUMPER BETWEEN PINS 2 AND 4FOR 2 V BIAS — COUNTRYMAN E6 and B6 MICS)(CONNECTING PIN 4 TO PIN 1 SHUTS OFF BIAS)PIN54321SHIELD (GND)AUDIOLine LevelNormal Hookup12345TA5FPLUGPIN54321AUDIOLine LevelMore Headroom 12345TA5FPLUG100kSHIELD (GND)If more headroom is needed, insert a 100k resistor inseries with pin 5. Put this resistor inside the TA5Fconnector to minimize noise pickup.WIRING HOOKUPS FOR DIFFERENT SOURCES
15Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USABefore 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 PWR LED OFF 1) Battery is inserted backwards.2) Battery is dead.3) Transmitter not powered up. (See Operating Instructions, PowerUP and Boot Sequence.)NO TRANSMITTER MODULATION LEDs1) Gain control set to minimum.2) Battery is in backwards. Check PWR LED.3) Mic capsule is damaged or malfunctioning.4) Mic cable damaged or mis-wired.RECEIVER RF INDICATOR OFF 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) Transmitter and receiver not on same frequency block.6) Operating range is too great.7) Defective transmitter antenna.NO SOUND (OR LOW SOUND LEVEL),RECEIVER INDICATES PROPER AUDIOMODULATION 1) Receiver output level set too low.2) Receiver output disconnected, or cable defective or mis-wired.3) Sound system or recorder input is turned down.DISTORTED SOUND 1) Transmitter gain (audio level) is far too high. Check SMModulation LEDs and receiver audio levels as SM is being used.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. (Use the receiver’s Tone function to check levelsettings.)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 operating frequency on receiver andtransmitter match.5) Receiver/Transmitter Compatibility Mode mismatched.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.5) Signal interference. Turn off transmitter. If receiver’s signalstrength indicator does not drop to nearly zero, this indicates aninterferring signal may be the problem. Try a different operatingfrequency.EXCESSIVE FEEDBACK 1) Transmitter gain (audio level) too high. Check gainadjustment and/or reduce receiver output level.2) Talent standing too close to speaker system.3) Mic is too far from user’s mouth.“L” APPEARS IN DISPLAY WHEN ANYBUTTON IS PRESSED 1) Control Panel is locked. (See Operating Instructions, Lockingand Unlocking the Control Panel.)TROUBLESHOOTING
16SMProfessional Audio Products Since 1971Operating frequencies:Block 21 537.600 - 563.100Block 22 563.200 - 588.700Block 23 588.800 - 607.900 and 614.100 - 614.300Block 24 614.400 - 639.900Block 25 640.000 - 665.500Block 26 665.600 - 691.100Block 27 691.200 - 716.700Block 28 716.800 - 742.300Block 29 742.400 - 767.900Frequency selection: 256 frequencies in 100 kHz steps per 25.5 MHz wide blockChannel Spacing:100 kHzFrequency adjustment: Control panel mounted membrane switchesRF Power output: 100 mW (nominal)Compatibility Modes:There are five- Digital Hybrid Wireless™ (400 Series), 200 Series, 100 Series, Mode 3 (other analog) and IFBPilot 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: –125 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: 40 dB; panel mounted membrane switchesModulation indicators:Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referencedto full modulation.Low frequency roll-off: –12 dB/octave; 70 HzControls:Control panel with LCD and four membrane switches.Audio Frequency Response: 70 Hz to 20 kHz, +/-1dB (The audio is deliberately rolled off at 70 Hz using a12 dB/octave filter. This filter cannot be disabled.)Signal to Noise Ratio (dB):(overall system, 400 Seriesmode)Total Harmonic Distortion: 0.2% typical (400 Series mode)Audio Input Jack: Switchcraft 5-pin locking (TA5F)Antenna: Fixed, flexible wire.Battery: 1.5 Volt AA lithium recommendedBattery Life: 2 hours (alkaline); 4.5 hours (lithium)Weight: 3.6 ozs. (102 grams) with lithium batteryOverall Dimensions:3.03 x 2 x 0.69 inches (not including microphone)Emission Designator: UNK AT THIS TIMESpecifications subject to change without notice.SPECIFICATIONS 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 deviceshould be installed and operated so that its antenna(s) are not co-located or operating in conjunction with anyother antenna or transmitter.SmartNR No Limiting W/ LimitingOFFNORMALFULL103.5107.0108.5108.5111.5113.0(Note: The dual envelope “soft” limiter providesexceptionally good handling of transients usingvariable attack and release time constants. Thegradual onset of limiting in the design begins belowfull modulation, which reduces the measured figurefor SNR without limiting by 4.5 dB)
17Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USASERVICE 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. Verify the integrity of theinterconnecting cords and then go through the TROUBLESHOOTING section in the manual.We 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 con-nection, 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 read-justment. 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 repairsare made at no charge in accordance with the terms of the warranty. Out-of-warranty repairs are charged at amodest flat rate plus parts and shipping. Since it takes almost as much time and effort to determine what is wrongas it does to make the repair, there is a charge for an exact quotation. We will be happy to quote approximatecharges by phone for out-of-warranty repairs. Our number is (505) 892-4501; Toll Free: (800) 821-1121.
18SMProfessional Audio Products Since 1971RETURNING 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 toknow the nature of the problem, the model number and the serial number of the equipment. We also need a phonenumber where 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 shownon 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 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.comEmail: sales@lectrosonics.com
19Frequency Agile UHF Ultra-Miniature Belt-Pack TransmitterRio Rancho, NM – USA
LIMITED ONE YEAR WARRANTY581 LASER ROADRIO RANCHO, NM 87124 USAwww.lectrosonics.com May 15, 2004Professional Audio Products Since 1971LIMITED 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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