Lectrosonics M4T Digital Modulation Transmission System User Manual

Lectrosonics Inc Digital Modulation Transmission System

User Manual

Digital IEM SystemINSTRUCTION MANUALRio Rancho, NM, USAwww.lectrosonics.comFill in for your records: Serial Number: Purchase Date:
QUADRALECTROSONICS, INC.2Table of ContentsSafety Notes .......................................................................... 3System Overview .................................................................. 4Receiver Operation ............................................................... 5Receiver Menus .................................................................... 6Selecting 2-channel or 4-channel Operation ..................... 62-channel Operation ............................................................. 74-channel operation ............................................................. 8Split 4-channel operation ..................................................... 9Receiver: Body Placement ................................................ 12Receiver Accessories ........................................................ 12Transmitter Front Panel ..................................................... 14Transmitter Rear Panel ....................................................... 14Initial Setup ......................................................................... 15Powering the Unit ON and OFF ......................................... 15LCD ...................................................................................... 15Audio Signal Monitoring .................................................... 15Transmitter Menus .............................................................. 16Selecting 2-channel or 4-channel Operation ..................... 16Tuning ............................................................................... 16Input Type .......................................................................... 16Audio Trim ......................................................................... 16Lock Setup ........................................................................ 17Factory Default Reset ....................................................... 17Rack Mount Hardware ........................................................ 18Dual Rack-Mount Instructions ........................................... 18Single Rack-Mount InstructionsFirmware Updates ........ 21Transmitter Accessories .................................................... 22Specifications ..................................................................... 22
Digital IEM SystemRio Rancho, NM 3Excessive sound levels can cause permanent hearing damage.1. Always adjust the volume to the lowest level be-fore listening to unknown transmissions.2. Use the lowest reasonable level consistent with hearing safety.3. Don’t use high sound levels in the earphone to overcome high ambient sound levels. That is ab-solutely foolish! Demand and use high isolation earphones.4. Don’t expose your ears to sound levels that cause them to ring. If your ears do ring after exposure, think of it as a warning bell telling you not to do that again.OSHA (Occupational Safety Health Administration) guidelines on the maximum allowable time exposure to sound pressure levels that will cause hearing dam-age are as follows:8 hours at 90 dB SPL 4 hours at 95 dB SPL 2 hours at 100 db SPL 1 hour at 105 dB SPL 30 mins at 110 dB SPL 15 mins at 115 dB SPLNEVER expose your ears to 120 dB SPL or higher! Damage will occur.Safety NotesFCC NoticeNOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pur-suant to Part 15 of the FCC Rules. These limits are de-signed to provide reasonable protection against harmful interference in a residential installation. The equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encour-aged to try to correct the interference by one or more of the following measures:• Reorientorrelocatethereceivingantenna• Increasetheseparationbetweentheequipmentand receiver• Connecttheequipmentintoanoutletonacircuitdifferent from that which the receiver is connected• Consultthedealeroranexperiencedradio/TVtech-nician for helpChanges or modifications to this equipment not ex-pressly approved by Lectrosonics, Inc. could void the user’s authority to operate it.Industry Canada NoticesOperation of this device is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept interference, including interference that may cause undesired operation of the device.This device has been designed to operate with the antenna listed below, and having a maximum gain of 6 dB. Antennas not included in this list or having a gain greater than 6 dB are strictly prohibited for use with this device. The required antenna impedance is 50 ohms.• LectrosonicsM4TAntenna;P/N21422• LinxTechnologiesmodelANT-916-CW-HWR-RPSTo reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for successful communica-tion.
QUADRALECTROSONICS, INC.4System OverviewThe Quadra system provides an entirely new level of audio and RF performance in a wireless monitor system. The combination of analog or digital input capability, ultra-low latency 24 bit, 48 kHz audio, digital RF modulation and discrete four channel mixing capa-bility make the Quadra a truly unique IEM product for mission-critical, professional applications. The system is designed for line level analog audio signalsandAES/EBUdigitalaudioinputsignals.48kHz/24-bitaudio,ruler-at20Hzto20kHzfrequencyresponse, ultra-low distortion and high dynamic range assure excellent audio quality. Housings and panels are machined aluminum with electrostatic powder coated and anodized finishes and laser etched mark-ing for durability. An intuitive mixing interface and comprehensive LCD on the belt pack receiver provides performing artists and monitor engineers alike with a comfortable and confident user experience.M4 TransmitterThe half-rack transmitter can accept up to four inputs from digital or analog sources. The inputs can be con-figured as follows:• Fouranaloginputsusingallfourjacks• Twodigitalinputsusingjack1andtwobalancedanalog inputs using jacks 3 and 4• Fourdigitalchannelsusingjacks1and2The input connectors are full-size balanced XLR types forAES/EBUandbalancedlinelevelanalogsignals.Input preamp circuits use a special balanced amplifier with very high common mode rejection to minimize hum and noise.EitheranalogorAES/EBUdigitalinputsignalsareconverted to an internal 24-bit digital format which is then encoded, organized into packets, and passed to an RF modulator using spread spectrum techniques and error correction for robust reception. The modu-lated RF signal is filtered before and after amplification to suppress out-of-band noise and spurious signals, andacirculator/isolatorguardsagainstintermodulationinterference (IM).The transmitter can be free-standing or rack-mounted in single units (via an optional rack mounting kit) or in a dual configuration using supplied hardware.A USB port is provided for firmware updates.M4 ReceiverThe receiver employs advanced antenna switching diversity reception, switching between the antennas during packet headers in order to maintain a seamless audio signal. A configurable four-channel mixer on the top of the receiver housing allows the user to mix from four discrete audio channels according to the needs of the performance. The headphone jack is fed from a high-qualitystereoamplierwithgreaterthan100mWavailable to drive headphones or earbuds to sufficient levels for stage performance or other environments with significant background noise. A high-density, backlit LCD allows the user to make setup changes via the available menu options.A USB port is provided for firmware updates.Frequency RangeUsing the license free 902 - 928 MHz ISM band, this system is outside the normal broadcast frequencies thus providing both technical and operational advan-tages over standard analog systems.ORFreq 1 Freq 2 Freq 3 Freq 44 CHANNEL MODE2 CHANNEL MODEFreq1AFreq2AFreq2BFreq3AFreq3BFreq4AFreq4BOR OR ORFreq1BIn four-channel mode, the system occupies 4 MHz and is selectable between four available center frequen-cies: 907.776, 912.384, 916.992 and 923.904 MHz. In two-channel mode, Quadra occupies 2 MHz and is selectable between eight available center frequen-cies: 906.624, 908.928, 911.232, 913.536, 915.840, 918.144, 922.752 or 925.056 MHz.Multi-Channel CapabilityQuadra can be configured to provide either 2 or 4 audio channels. In the 2-channel mode, eight different frequencies are available, each with two audio chan-nels. In the 4-channel mode, four different frequency bands are available, each with four audio channels. Multiple Quadra systems can be operated in the same location to provide up to 16 audio channels.The performer can then use the on-board mixer to tai-lor the audio output to his or her tastes or the require-ments of the performance at hand.
Digital IEM SystemRio Rancho, NM 5Receiver OperationBattery InsertionThe receiver is powered by three AA batteries, either alkaline, lithium, or rechargeable types. Do not use “heavy duty” batteries from a drug store - they will not last long in the M4 receiver.Open the battery door by pressing on it while sliding it downward.Itshouldthenipopenallowingfullaccessto the battery compartment. Carefully note the battery orientation as indicated by the diagrams inside. The outer two batteries are positive (+) facing in, while the middle battery is positive (+) facing out.Once the three batteries are in place, close the door by swinging it shut then sliding it upwards while apply-ing slight pressure. It should snap shut and line up with the case.Powering the Unit ON and OFFPress the power button once to turn on the unit. Check to see that the LCD displays the single-screen Power Up Sequence:Lectrosonics M4R vX.XX (the current firmware version)Power ButtonAfterthePowerUpSequenceisdisplayedbriey,theMainWindowappearsandtheM4Risreadyforopera-tion.Note also that the BATT LED should be lit. Green indicates good power. Red indicates your batteriesare2/3depleted.Flashingredindicatesthat you should replace your batteries as soon as possible.To turn the receiver off, press and hold the power but-ton for three seconds. A countdown will be displayed until the power is turned off.Control Panel/KnobsThe four knobs on the top edge of the M4 receiver (two are in a dual concentric arrangement and two are separate) allow for a number of mixer configurations by using the Chan. Setup in the LCD menu. The first knob (the tall, skinny one) is usually set as a Master Volume, while the other three can be set up differently depending on the artist’s needs and preferences. See Selecting 2-channel or 4-channel Operation below for details.Theheadphonejackisastandard1/8”stereoTRS(tip,ring, sleeve) jack with standard headphone wiring (tip is left, ring is right, sleeve is ground). The headphone ampcandelivermorethan100mWintoa32Ohmloadso it is important to always start with the volume low before plugging in your headphones or earbuds.CAUTION: Hearing damage can result from listening too loudly with this receiver!
QUADRALECTROSONICS, INC.6LCDThebootsequencewillbrieydisplaythecompanylogo, model number and firmware revision.Following the boot-up sequence, the receiver will re-verttotheMainWindow,showingthefollowing:• Operatingfrequencyattheupperleft(Frq1,Frq2,etc. for 4-ch or Split 4-ch operation, Frq1a, Frq1b, Frq2a for 2-ch operation)• RFlevelmeter(alongthetopedgeoftheLCD)• Audiolevelmetersinthemiddleofthedisplay(either two or four, depending on operating mode)• Knobsetupalongthebottom(Mstr(1,2)+3,4;Mstr (1) + 2, 3, 4, etc.)Receiver MenusToaccessthesetupmenus,pressthe“MENU/SEL”button at the upper left of the membrane panel. To back up one level or return to the “home screen”, press the“BACK”button.TheUPandDOWNarrowbuttonsalong the right side of the control panel allow you to navigate between menu options and to adjust specific parameters within the setup screens.Battery status is indicated by a GREEN LED. The LED turns REDtoindicatethatyourbatteriesare2/3depleted. FLASHING RED indicates that you should replace your batteries as soon as possible.Selecting 2-channel or 4-channel OperationThe Chan. Setup screen allows you to select whether the receiver operates in 2 ch., 4-ch. or split 4-ch. modes, and then how the knobs on the top of the receiver are configured as a mixer.Each Chan. Setup screen allows setting of 2-channel and 4-channel modes, plus a second line for selection of the knob configurations.2/4 channel selectionknob configurationPress MENU/SEL to toggle the highlight between the Chans and KnoblinesandusetheUPandDOWNarrow keys to make selections.
Digital IEM SystemRio Rancho, NM 72-channel OperationNOTE: the transmitter must be also in 2 ch. mode for the receiver to operate in this manner.2-ch. mode allows for three different knob setups:• Master(1,2) This is the factory default and is equivalent to standard IEM systems where only a stereo signal is used. The tall, thin knob is the stereo master volume.• Master(1)+2 Feeds audio channel 1 to the master volume (tall, thin knob) and audio channel 2 to the middle knob for independent control.• 1+2 Gives you individual control over both audio channels. Audio channel 1 is fed to the tall thin knob, and audio channel two is fed to the middle individual knob. In this setup, there is no master volume knob. You can develop a stereo mix by panning each channel in the stereo field (see pan-ning, below).MASTER VOLUMEAUDIO CH.12NO FUNCTIONNO FUNCTION2 CHANNEL - Master (1,2) mode (factory default)MASTER VOLUME2 CHANNEL - Master (1) + 2 modeAUDIOCH. 1AUDIOCH. 2MASTER VOLUMENO FUNCTIONAUDIOCH. 1AUDIOCH. 22 CHANNEL - 1 + 2 modeNO FUNCTION
QUADRALECTROSONICS, INC.84-channel operationIn this mode, all four audio channels fed to the trans-mitter are available at the receiver. NOTE: the transmitter must be in 4 ch. mode for the receiver to work in this manner.Audio can be routed to the four audio control knobs in the following ways:• Master(1,2)+3,4 Feeds channels 1 & 2 to the master volume knob in a fixed stereo relationship, while audio chan-nels 3 & 4 are on the two smaller separate knobs. This gives you individual control over two of the channels in their relationship to the stereo mix. For instance, you may want to have drums and bass (in stereo) on 1 & 2, your guitar in ch. 3 (first small knob, in the middle) and your vocals in ch. 4 (second small knob, closest to the headphone jack). After choosing this mode, you would use the master knob to control your overall volume, and the other two knobs to change how those two individual channels are mixed into the master.• Master(1) +2, 3, 4 Places ch. 1 on the master knob, and then gives you individual control over channels 2, 3 and 4. Use this mode if you plan to have a mono mix as a starting point, and then add three additional chan-nels that you would like to adjust during perfor-mance. An example would be drums and bass (in mono) on 1, backing vocals on 2, your guitar on 3, and your vocals on 4.• 1+2+3+4 Gives you individual control over all four audio channels. In this setup, there is no master vol-ume knob. You can develop a stereo mix by pan-ning each channel in the stereo field (see panning, below).MASTER VOLUMEAUDIO CH.12NO FUNCTIONAUDIOCH. 3 AUDIOCH. 44 CHANNEL - Master (1,2) + 3,4 modeMASTER VOLUMEAUDIOCH. 14 CHANNEL - Master (1) + 2,3,4 modeAUDIOCH. 2AUDIOCH. 3 AUDIOCH. 4AUDIOCH. 1 AUDIOCH. 34 CHANNEL - 1+2+3+4 modeAUDIOCH. 2AUDIOCH. 4
Digital IEM SystemRio Rancho, NM 9Split 4-channel operationSplit 4-ch. mode allows you to use a single M4T transmitter to send two different stereo mixes to two different receivers or groups of receivers using a single radio frequency.NOTE: the transmitter must be in 4 ch. mode for the receiver to work in this manner.Split 4-ch. mode allows for four different knob setups:• Master(1,2) Equivalent to standard IEM systems where only stereo signal is used. The tall, thin knob is the ste-reo master volume and is fed from audio channels 1 & 2. Here, although there is audio on channels 3 & 4 in the transmission itself, they are muted and thus the two individual knobs do not function.• Master(3,4) Also equivalent to standard IEM systems where only stereo signal is used. The tall, thin knob is the stereo master volume and is fed from audio channels 3 & 4. Here, although there is audio on channels 1 & 2 in the transmission itself, they are muted and thus the two individual knobs do not function.• Master(1)+2 Feeds audio channel 1 to the master volume (tall, thin knob) and audio channel 2 to the middle knob for independent control.• Master(3)+4 Feeds audio channel 3 to the master volume (tall, thin knob) and audio channel 4 to the middle knob for independent control.SPLIT 4 CHANNEL - Master (1,2) modeAUDIO CH.12NO FUNCTIONNO FUNCTIONMASTER VOLUMESPLIT 4 CHANNEL - Master (3,4) modeAUDIO CH.34NO FUNCTIONNO FUNCTIONMASTER VOLUMEMASTER VOLUMEAUDIOCH. 1 AUDIOCH. 2SPLIT 4 CHANNEL - Master (1) + 2 modeNO FUNCTIONNO FUNCTIONMASTER VOLUMEAUDIOCH. 3 AUDIOCH. 4SPLIT 4 CHANNEL - Master (3) + 4 modeNO FUNCTIONNO FUNCTION
QUADRALECTROSONICS, INC.10TuneTo select your operating frequency, choose Tune in the menu list, and press the MENU/SEL button.Here, you can choose between four operating frequen-cies in the 4-ch mode or Split 4-ch mode, or eight operating frequencies the in 2-ch mode.You should first test your proposed frequency by first ensuring that your transmitter is turned off and then observing the RF level in the LCD on your receiver in the main window. RF signal strength is indicated by this status bar.If you see a large RF signal at the receiver and your transmitter is off, you may want to choose a different operating frequency to attain as much operating range as possible.Note: Frequency 1a at 906.624 MHz is the factory default setting.Once you have selected an operating frequency, press the BACK button to return to the main menu list. As soon as you turn on your transmitter (see transmit-ter section), place it in the correct mode (2 ch. vs. 4 ch.) and then tune it to the same frequency as your receiver/s,youshouldseetheblue“RF”LEDlightonyourreceiver/s.Thisindicatesyouhaveasignallock.PanTo select your overall stereo balance and stereo pan-ning for individual audio channels, use the arrow but-tons to highlight Pan in the menu list.Press the MENU/SEL button to enter the setup screen. The setup screen that appears will be determined by the 2 channel or 4 channel mode and the knob configuration you have selected. Continue pressing MENU/SEL to select the channel, then use the UP and DOWNarrowsbuttonstoadjustthebalance.Note: All channels panned center and stereo balance centered is the factory default setting.In a mode that defines a Master knob, the uppermost channel line is labled BAL.Use the MENU/SEL button to move between master balance and the available audio channels.Press MENU/SEL to select channel (highlight)For stereo balance (when available), use either the arrow keys or the lower concentric knob to adjust the desired L-R balance.Use UP and DOWN buttons or lower concentric knob to pan the highlighted channelFor individual channels (when available), use either the arrow keys or the lower concentric knob to pan the channel to the desired position in the stereo field. Once you have completed the necessary adjustments, pressthe“BACK”buttontoexitthisscreenandreturnto the main menu.
Digital IEM SystemRio Rancho, NM 11LimiterThis feature can be used in order to provide audio lim-iting at the receiver in order to prevent excessive levels at the headphones or earbuds. To set the amount of limiting, highlight “Limiter” in the menu list using the ar-rowkeys.Press“MENU/SEL”tochoosethisfunction.Use the arrow keys to select the limiter threshold in 3dB increments. Test it with a known signal to deter-mine the maximum sound level you are comfortable with. The pre-gain setting can then be used to boost the audio level before the limiter. Use this feature if you need to make up for a weaker signal at the transmitter. UsetheMENU/SELbuttontochoose“Pre-Gain”,thenuse the arrow buttons to adjust in 3 dB increments.BacklightThe backlight control page allows you to select the length of time before the backlight turns off on the re-ceiver. The factory default setting is 5 minutes, but you can also select 30 seconds or “Always on.”Treble ShelfIn this screen, you can choose a treble boost with a corner either at 5kHz or 7kHz, and a boost of up to 9dB in 3dB increments. This feature can be used to overcome a stereo mix without enough high frequency information, or earbuds that “roll off” too early in the high frequency area.This high-frequency boost should be used sparingly due to the fact that it can accelerate hearing loss with high volumes in the earphones or headphones. Note: the factory default setting is 5 kHz corner with 0dB boost.Lock SetupThis feature is used to lock the control panel so that no further changes can be made. Once “Locked” is se-lected, note that a small lock icon is at the upper right ofeachsetupmenuscreen.Withthereceiverlocked,you can view each menu screen but you are unable to make changes and the power can not be turned off.To return to the unlocked status, go back to the “Lock Setup” screen via the main menu, and select “Un-locked”. Also, note that the “Locked” status is main-tained even if the batteries are changed.Factory DefaultThis is used if you intend to reset the receiver to all the factory default settings.
QUADRALECTROSONICS, INC.12Receiver: Body PlacementPosition the receiver on a belt, guitar strap, wardrobe, etc. so that the antennas are oriented vertically and not touching a metallic surface. Make sure the antennas are on the outside of thick or metallic costuming so the antenna whips will be out in the open. It is also good practice to keep the antenna whips from contacting a person’s body directly for maximum receive sensitivity.Receiver Accessories• Replacementwirebeltclip.• CCM4RFoamlinedcarryingcase
Digital IEM SystemRio Rancho, NM 13
QUADRALECTROSONICS, INC.14Transmitter Front PanelTMDIGITAL IEMHeadphone Monitor Power SwitchChannel Select ButtonsTransmitter Rear PanelDIGITAL IEM TRANSMITTER AES INCH1/CH21234AES INCH3/CH4USBANT100-240 VAC, 50/60 Hz, 5W S/NUSB Port for Firmware UpdatesAntenna Output Analog Audio InputsPower Inlet 100-240 VAC, 50/60 Hz, 5 WDigital Audio Inputs
Digital IEM SystemRio Rancho, NM 15Initial SetupConnect AC power to the M4T transmitter using the provided power cable. To ensure that the power cable can not come loose, use the provided wire retainer. By placing the retainer above the cable and then pressing down, the retainer can not come loose.Attach the supplied antenna to the antenna port on the back of the M4T, and position it pointing upright while tightening the knurled nut at the base of the antenna. If you are rack-mounting one or more M4T transmit-ters, please see the section on installing rack mounting hardware (below).Connect your audio inputs via the XLR connectors. Note that like a mixing console, the inputs are oriented right to left, inputs 1-4. If you are feeding the transmit-ter with analog audio signals, connect your channel 1 to input 1, channel 2 to input 2 and so on. IfyouaresendingdigitalAES/EBUsignalstotheM4Ttransmitter,notethatAES/EBUlinescarrytwochan-nels on a single XLR connection. Therefore, channels 1 & 2 would be connected to input 1, and channels 3 & 4 are connected to input 2. Note also that in order to change between analog and digital inputs, use the front panel menus (see below).Powering the Unit ON and OFFOnce you have connected AC power, the antenna, and your audio lines, apply power to the M4T using the switch on the front panel. The LCD displays a brief logo and graphic, followed by the model number, de-scription and firmware version:AfterthePowerUpSequence,theMainWindowap-pears and the M4T is ready for operation.To turn the transmitter off, simply return the front panel power switch to the “off” position.LCDTheMainWindowshowsthefollowing:• Operating frequency (Frq1, Frq2, etc. for 4-ch or Split 4-ch operation (Frq1a, Frq1b, Frq2a, etc. for 2-ch operation - see Channel Setup below)• Audio level meters for either two or four channels (depending on how the M4T is set up - see Chan-nel Setup below)• Headphone monitoring channels as indicated by the small headphone icons next to the level meters for those channels.Audio Signal MonitoringThe signals at the inputs can be monitored in two ways: using the LCD bar-graph meters for levels and with headphones for listening to the actual signals. The LCD bar-graph meters show the audio level range from -60to0dB.Whenthesignalexceedstheavailableinput headroom, the bar graph indicates this with a bright “!” at the top of the bar on that channel. Because this is a digital system, overloads should be carefully avoided as to prevent signal distortion at the convert-ers. NOTE: Do not “drive” this transmitter as you might be tempted to do with an analog IEM system. Gener-ally, it is best to leave 3 dB of headroom above your strongest peaks to ensure that you are not clipping the signals. Clipping IndicatorTomonitortheaudiosignal/s,plugintotheheadphonejack with headphones or earbuds. Push the volume knob so that it “pops out” for level adjustment. To selectthechannel/sforlistening,pressthenumberedbutton/s1-4belowthosechannels.Eitheroneortwochannelsatatimecanbemonitored.Whenonechan-nel is chosen, it is panned center in the headphone stereoeld.Whentwochannelsarechosenbypress-ing both buttons at the same time, they are panned hard left & right in the headphones.CAUTION: Start with the monitor volume at a low setting before plugging in your headphones or earbuds - excessive volume can damage your hearing.
QUADRALECTROSONICS, INC.16Transmitter MenusToaccessthesetupmenus,pressthe“MENU/SEL”button at the upper left of the membrane panel. To back up one level or return to the “home screen”, press the“BACK”button.Thearrowkeysalongtherightsideof the control panel allow you to navigate between menu options and to adjust specific parameters within the menu windows.Whenthedesiredmenuitemishighlighted,presstheMENU/SELbuttontoenterthesetupscreen.Selecting 2-channel or 4-channel OperationThe Chan. Setup screen allows you to select whether the transmitter operates in 2-channel or 4-channel mode. This determines the width of the RF carrier, and thus how many frequencies can be used in one place at one time. In 2-channel mode, the RF carrier is 2 MHz wide, thus yielding 8 available operating frequen-cies. In 4-channel mode, the RF carrier is 4 MHz wide, thus yielding 4 operating frequencies. NOTE: for the system to operate, the transmitter and receiver must be in the same channel setup (2 ch. vs. 4 ch.) Furthermore, note that for the receiver to work in Split Mode (see p. 8), the transmitter must be in 4-channel mode.TuningOnce you have selected a Channel Setup, you can choose an RF operating frequency. Generally, it is best to use your receiver to determine the best operating frequency with the tuning method described on p. 9. To then select the matching operating frequency on your M4Ttransmitter,usetheup/downarrowstohighlight“Tuning”onthemenulist,thenpress“MENU/SEL”.Here, you can select from four operating frequencies (in 4-ch) or eight operating frequencies (in 2-ch mode).Once you have selected a matching operating fre-quency, the blue LED on the front of your IEM receiver should light up, indicating an RF signal lock.Input TypeThis allows you to choose between analog and digital inputs, depending on your source from the mixing console.Fromthemainmenu,usetheup/downarrowbuttonstohighlight“InputType”.PresstheMENU/SELto enter this page. Here, you have three choices: All Analog, 1&2 Digital, and All Digital. Because XLR inputs1and2alsodoubleasdual-channelAES/EBUdigital inputs, only these three choices are possible.NOTE: the M4T inputs are set to “All Analog” as a factory default. If you send digital signals to the input without changing the Input Type, the system will transmit a very loud white-noise signal to the receiver. Also, if the receiver inputs are set to “Digital”, and you are sending analog signals to the inputs, there will be no audio present.Audio TrimWhenusinganaloginputs,thisfeaturegivesyoutheopportunity to adjust the transmitter input gain in 1 dB increments, on a per-channel basis. For very “hot” analog signals from the console, you may need to attenuate the input gain to compensate, thus avoiding clipping and the resulting signal distortion. Toselectaudioinputtrimlevels,usetheup/downarrow buttons to highlight “Audio Trim”, then use the MENU/SELbuttontoenterthispage.Usethenum-bered buttons 1 through 4 to select the channel, then usetheup/downarrowstoincreaseorreducetheamount of attenuation on that channel.
Digital IEM SystemRio Rancho, NM 17NOTE: input channels that have been selected asAES/EBUdigitalinputsdonotallowinputleveltrim.In the case where the resulting volume at the receiver headphones or earphones is deemed insufficient, the receiver provides makeup gain (see receiver Dynamic Boost on p. 9)NOTE: Do not “drive” this transmitter as you might be tempted to do with an analog IEM system. Gener-ally, it is best to leave 3 dB of headroom above your strongest peaks to ensure that you are not clipping the signals.Lock SetupSo that the front panel buttons can be locked to pre-vent further changes, the Lock Setup feature is provid-ed.Usetheup/downarrowstohighlight“LockSetup”andpresstheMENU/SELbuttontoenterthatscreen.Usetheup/downarrowstoselecteitherLockedorUn-locked. Once Locked is selected, no further changes can be made to the transmitter settings until this same screen is entered and Unlocked is selected. NOTE: Features not affected by the Lock Setup include channel monitoring selection and headphone volume.NOTE: Features not affected by the Lock Setup include channel monitoring selection and headphone volume.Factory Default ResetTorestorefactorydefaultsettings,usetheup/downarrow buttons in the main menu to highlight “Defaults”, thenpresstheMENU/SELbutton.Usetheup/downarrows to select “Yes”. To activate the factory default reset,nowpresstheMENU/SELbutton.Thescreenwill show “Defaults Restored” thus indicating that the process is complete.NOTE: DO NOT restore factory defaults while someone is listening to the receiver with headphones or earbuds - the resulting change in levels or input type may cause a VERY LOUD signal to be transmitted to the receiver.
QUADRALECTROSONICS, INC.18Rack Mount HardwareThe M4T is delivered with a partial set of rack mount hardware,includingbolts,arackear,connectingang-es,antennacableandfront-panelhandles.WithtwoM4T units, there is enough hardware supplied in the delivery to connect the two units together, front-mount the antennas, and prepare the units as a complete as-sembly ready for mounting in a rack enclosure.If you need to rack-mount a single M4T transmitter, you will need to purchase the optional RMPM4T-1 rack kit. The kit provides a blank half-rack panel, a rear mounting brace and the additional hardware required for this setup.Dual Rack-Mount Instructions1. Remove the plastic end-caps from the front of the M4T and pry out the metal inserts on each side of the transmitters with a small screwdriver.Plastic guards snap out from corners. Pry out the aluminum inserts on the side panel with a small screwdriver.2. Attach the antenna cables to the rack ears with the supplied nuts and lock washers. Tighten with a small wrench - do not over-tighten the nuts but make sure they are snug enough not to work loose.3. Insert the rack ear and attach the handle to the front of the panel using the supplied hex-head bolts and hex wrench. The screws should go through the handle, through the front panel, and into the rack ear nuts. Tighten these bolts firmly.4. Remove the hex head bolts from the rear of both units right where they contact each other. Attach thetwounitsusingthetwometalanges,thenon-threaded one for the rear and the threaded one for the front. Secure them with the supplied hex head bolts. Tighten these bolts firmly.NOTE: The threads in the front adapter plate are a self-locking type. Tighten the screws until the headisushwiththefrontpanel.
Digital IEM SystemRio Rancho, NM 198. Attach the antenna wires to the antenna ports on the back of the transmitters.9. Attach the supplied antenna connector protectors to the sides of the transmitters right behind the rack ears. Secure them with the supplied screws. Note that this item will fit tightly and is meant to deform slightly during installation.The dual set of M4T transmitters is now ready for rack mounting.
QUADRALECTROSONICS, INC.20Single Rack-Mount Instructions (using optional RMPM4T-1 kit)1. Remove the plastic end-caps from the front of the M4T transmitter. Pry out the metal inserts on each side of the transmitter with a small screwdriverPlastic guards snap out from corners. Pry out the aluminum inserts on the side panel with a small screwdriver.2. Attach the antenna cable to the rack ear with the supplied nut and lock washer. Tighten with a small wrench - do not over-tighten the nuts but make sure they are snug enough not to work loose. In-sert the rack ear into the left side of the transmitter front panel.3. Insert the rack ear and attach the handle to the front of the panel using the supplied hex-head bolts and hex wrench. The screws should go through the handle, through the front panel, and into the rack ear nuts. Tighten these bolts firmly.4. Attach front bracket plate to right side of panel.Insert the screws partially, but do not tighten them yet.5. Attach the blank panel to the bracket and tighten all four screws.The threads in the front adapter plate are a self-locking type. Tighten the screws until the heads are flush with the front panel.6. Mount the steel brace with the supplied screws. Do not tighten the screws yet.7. Attach the steel brace to the blank panel using the supplied screws. Tighten all four screws that retain the brace. Install handle and bracket with supplied screws8. Attach the supplied antenna and antenna guard.
Digital IEM SystemRio Rancho, NM 21Firmware UpdatesAs new versions of the firmware become available, updates are accomplished with a software utility and simple procedure. In many cases, updates must be made to both transmitter and receiver to ensure com-patibility and provide the latest feature set.ThesoftwareinterfaceoperateswithWindows2000,XP and Vista operating systems.Configuring the USB Port1) Remove any previous LecNet2 installation from your computer.2) Install LecNet2 software. Use the CD supplied with the Quadra system or download the LecNet2 Software Installer or the CD contents from the web site: http://www.lectrosonics.com/lecnet2/lecnet2.htm3) On the same web page, scroll down to LecNet2 Firmware Updates. Download the latest firmware files and store them in a convenient directory on your local hard drive. The files are stored on the web site as .zip files. After they are extracted the filename extension is .rpd. There are separate files for the receiver and the transmitter.4) Install batteries or connect power to the unit.5) Plug the USB cable into the unit. If this is the first time this unit has been connected to this computer, Windowswillaskforadriverlocation.Thedefaultdirectory used by the LecNet2 installer is: c:\Program Files\Lectrosonics\drivers Oncethedriverislocated,Windowswillcompletethe installation and display a message stating that the USB device is now ready to be used.NOTE: If a message appears during installation stating that the driver is not signed by Microsoft, click on Continue to finish the installation.Installing the FirmwareMake certain that the USB port is configured to com-municate with the unit. If not, follow the procedure outlined above to install the USB driver.Launch the utility:Start>All Programs>LecNet2>Tools>D4/M4 Update Utility The Browse button is used to select the file to be loaded into the unit.The Write button initiates the installation process.The Verify button on the Utility program control panel is used to compare the version of the selected file with that of the firmware installed in the unit. Clicking the button will start the process. After a few seconds, an OK screen will appear if the versions are the same, or a mismatch screen will appear if the versions are different.NOTE: Verification takes place automatically during the installation process launched by clicking the Write button.Thermwareversionintheunitisdisplayedbrieyonthe LCD during the turn-on cycle. The version of the downloaded firmware file is indicated by its filename.1) Click on the Browse button and select the folder where the downloaded firmware files are stored. Select the correct file for either the receiver or transmitter, whichever is connected.2) Click the Write button to copy the new firmware into the unit. The progress bar will indicate as the firmware is being updated.3) After about 30 seconds an OK message will ap-pear if the installation was successful.4) Click the Exit button to close the software panel.If the wrong firmware is installed into a unit (such as the M4R receiver firmware being loaded into the M4T transmitter) the installation process will appear to work but the LCD on the unit will likely be blank and the unit will not operate. Installing the correct firmware will restore the unit to normal operation.The USB port is on the side panel of the receiver and on the rear panel of the transmitter.
QUADRALECTROSONICS, INC.22Transmitter AccessoriesRMPM4T-1SingleUnitRackMountKitP/N21499PowerCord,6ft.long,NEMA3-pinplugLectrosonicsM4TAntenna;P/N21422SpecificationsOverall SystemOperating Spectrum: 902 - 928 MHzCenter Frequencies (MHz): 4-channel Mode: 907.776, 912.384, 916.992, 923.904 Four 4-channel systems can operate simultaneously for a total of 16 audio channels.Center Frequencies: (MHz): 2-channel Mode: 906.624, 908.928, 911.232, 913.536, 915.840, 918.144, 922.752, 925.056 Eight 2-channel systems can operate simultaneously for a total of 16 audio channelsModulation Type: Differential QPSK with Forward Error Correction, spread spectrumOccupied Bandwidth: 4 MHz (4-channel mode), 2 MHz (2-channel mode)Audio Sampling: 48 kHz, 24-bitLatency (overall system): Digital: Less than 0.5 mS Analog: Less than 1.0 mSSelectable Audio Channels: • 4 digital • 2 digital, 2 analog • 4 analogAudio Performance (overall system): Frequency Response: 20 Hz - 20 kHz, +/– 0.5 dB THD+N: < 0.05% (1 kHz @ –10 dBFS) Dynamic Range: > 104 dB A-weighted Adjacent Channel Isolation: > 93 dBM4T TransmitterPower output: 200 mWAudio Input: Simulated transformer balanced inputs, clip level adjustable +0 to +20 dBu (or AES/EBU digital standard)Power requirements: 100 - 240 VACPower consumption: 5 WattsDimensions: Height: 1.750 in. / 44.45 mm. Width: 8.375 in. / 212.7 mm. Depth: 7.750 in. / 196.8 mm.Weight: 2.36 lbs.; 1068 gramsM4R ReceiverDiversity Type: Switched antennaAudio Output: Earphone: 100 mW at 32 Ohms –20 to +0 dBuPower requirements: 3 x AA batteries (4.5V)Power consumption: 230 mADimensions: Height: 4.725 in. / 120 mm. (with knobs) 3.735 in. / 94.87 mm. (housing) Width: 2.75 in. / 69.85 mm. Depth: .960 in. / 24.38 mm.Weight: 9.14 ounces / 259 grams (with alkaline batteries)Specifications subject to change without notice.
Digital IEM SystemRio Rancho, NM 23
13 December 2010581 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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