Lectrosonics UM700 Wireless Microphone Transmitter User Manual um700man p65

Lectrosonics Inc Wireless Microphone Transmitter um700man p65

users manual

UM700DIGITAL FREQUENCY-AGILEUHF BELT-PACK TRANSMITTERLECTROSONICS, INC.Rio Rancho, NMwww.lectrosonics.comOPERATING INSTRUCTIONSand trouble-shooting guide
2TABLE OF CONTENTSThe UM200C transmitter is FCC type accepted under Part 74: 470-608MHz and 614-802MHzINTRODUCTION .................................................................................................. 3GENERAL TECHNICAL DESCRIPTION ............................................................ 4CONTROLS AND FUNCTIONS .......................................................................... 6BATTERY INSTALLATION ................................................................................... 8OPERATING INSTRUCTIONS ............................................................................ 8OPERATING NOTES ........................................................................................... 9ADJUSTING THE TRANSMITTER FREQUENCY.............................................. 9MICROPHONE CORD TERMINATION ............................................................. 105-PIN INPUT JACK WIRING ............................................................................. 11A6U UHF ANTENNA.......................................................................................... 13TROUBLESHOOTING ....................................................................................... 14SPECIFICATIONS AND FEATURES................................................................. 15SERVICE AND REPAIR ..................................................................................... 16RETURNING UNITS FOR REPAIR ................................................................... 16WARRANTY ......................................................................................... Back cover
3Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USAINTRODUCTIONThe 700 Series wireless system was designed to take advantage of the superioraudio performance provided by DSP audio signal processing and the securityprovided by proprietary digital and encrypted digital radio operation.Several advantages are provided by a digital wireless system and DSP technology:• A digital radio system provides outstanding signal to noise ratio• The signal to noise ratio of a digital radio system does not vary with the RF signalstrength arriving at the receiver.• DSP audio signal processing provides a superior limiter• Eavesdropping is difficult and secure encryption techniques can be implementedThe UM700 is a rugged, machined aluminum package in a belt-pack configurationwith a removable, spring loaded belt clip. A 5-pin input jack provides taps for anymicrophone or line level signal. The unit is powered by a single 9 Volt alkaline orlithium battery, or from external DC using an optional battery eliminator. The an-tenna is a detachable, locking 1/4 wavelength flexible bronze alloy cable that con-nects to a 50 Ohm SMA port on the control panel.Only the UM700 transmitter is covered in this manual. Companion receivers arecovered in separate manuals. The UM700 will operate with any 700 Series Lec-trosonics receiver in the same frequency block.
4UM700Block Diagram54321FreqSwitchesShuntLimiterFromDSPLFRoll-OffPreamp andSupersonicFilter AudioGain+5V BiasSupplyMicJack Buffer andLo FreqFilterAnalog to DigitalConverterDigital SignalProcessorTo uPModulatorDriveAmp PowerAmp1231/4 WaveAntenna50AudioLevelOscillatorFilterSynthesizerTouPuPEEPromMulticolorAudio LevelLEDsMulticolorBattery StatusLEDSwitchingPwr SupplyDelay Controlfrom uP9VPolarityProtectionDiodePowerSwitch 4V MainPwr SupplyIsolatorGENERAL TECHNICAL DESCRIPTIONGENERALThe 700 Series wireless system uses digital modulation for an extremely high signal to noise ratio and freedom fromdistortion and compandor artifacts. The input preamplifier uses an ultra low noise op amp for an excellent signal tonoise ratio. A dual-envelope limiter is implemented by the DSP firmware to cleanly limit input signal peaks up to30dB above full modulation. The transmitter circuits are all regulated to allow full output power from the beginning (9Volts) to the end (5.5 Volts) of battery life.The UM700 transmitter is comprised of a number of functional sub-systems as shown in the block diagram below.DIGITAL MODULATIONDigital modulation is used to eliminate compandor artifacts and provide an extremely high signal to noise ratio. Aproprietary compression algorithm is used to contain the RF energy into a narrower bandwidth than other digitalsystems to allow the 700 Series system to utilize frequencies in FCC Part 74 for broadcast and motion pictureproduction. For applications that require secure operation that prevent eavesdropping, encryption can easily beimplemented.AUDIO PROCESSINGThe input circuitry includes an adjustable low frequency roll-off filter ahead of the limiter and gain stage to customizethe low frequency response for varying conditions. In controlled environments with minimal low frequency ambientnoise, such as a film production set, the frequency response can be extended to 30 Hz. For applications withexcessive low frequency energy, such as in a moving vehicle or rooms with HVAC noise, the low end can be rolledoff as high as 150 Hz to reduce the effects of the noise.A “dual-envelope” limiter with 30 dB of range is next in the signal chain. This special limiter is software controlled,being driven by the DSP to minimize “overshoot” and slow attack times that can occur in other types of limiter circuits.The compressor works with two different time constants to cleanly handle a wide variety of dynamics. A fast peaklimiter prevents overload distortion from sharp, infrequent transients in the audio signal, and an averaging limiter withlonger time constants prevents “pumping” (gain modulation) that can occur with repeated peaks that are closelyspaced. Supersonic filtering is provided to prevent excessive high frequency energy from entering the A/D converter.
5Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USAA/D CONVERTER AND DSP PROCESSORThe processed audio signal enters the A/D converter to generate a digital signal for the modulator. A proprietaryalgorithm is used for sampling and compression to minimize noise and distortion, and provide a wide, flat frequencyresponse. The signal then enters the modulator to generate a digitally modulated radio signal.OUTPUT SECTIONIntermodulation (IM) occurs in the final amplifier stages of conventional transmitters when the transmitters are withina few feet of each other. This can create serious problems in multi-channel wireless systems when an IM signal fallson the carriers, IF frequencies, etc. of the systems being operated. To eliminate this problem in the UM700, themodulated radio signal passes through a circular isolator before entering the antenna. The circular isolator functionslike a “one-way check valve” to allow the RF signal to pass through to the antenna, but not to pass backwards intothe amplifier stage. RF signals from other nearby transmitters cannot reach the output amplifier in the UM700. Thisprovides excellent stability and eliminates IM in the output stage of the transmitter.LONG BATTERY LIFEHigh efficiency circuits and switching power supplies throughout the design allow over 4.5 hours of operation using asingle 9 Volt alkaline battery. (A 9V lithium battery will provide over 14 hours of operation.) The battery compartmentis a unique mechanical design which automatically adjusts to fit any brand of battery. The battery contacts are springloaded to prevent “rattle” as the unit is handled.FREQUENCY AGILITY700 Series wireless systems are available on eight different “blocks” of 256 frequencies, from 537.600 to 767.900MHz. Each of these blocks provides 256 selectable frequencies in 100 kHz steps over a 25.6 MHz bandwidth. Thiswide variety of selectable frequencies alleviates carrier interference problems in mobile or traveling applications. Two16-position rotary switches on the side panel of the unit are used to select the frequency.The UM700 transmitter section uses a synthesized, frequency selectable main oscillator The frequency is extremelystable over a wide temperature range and over time.ANTENNAAt UHF frequencies, where wavelengths and antennas are shorter than at VHF frequencies, a resonant length wire ispreferred over using the microphone cable as the antenna. The antenna on the UM700 consists of a flexible 1/4wavelength bronze cable, detachable via an SMA connector. The impedance of this connector is 50 Ohms.
6FREQUENCY1.6MHz 100kHzBLK 20 (BK)512.0 - 537.5SN:XXXX35 15075 HzLF ROLL OFFFCCID:DBZUM700Lectrosonics, Inc.Made in U.S.A.LECTROSONICSUM700OFF ONLEVELAUDIOANTENNACONTROLS AND FUNCTIONSINPUT JACKThe input jack on the UM700 is a Switchcraft TA5M connector that accommodates virtually every lavalier, hand-heldor shotgun microphone available, with positive or negative bias. The input will also cleanly handle line level signalsup to 300 mV before limiting. Use a Switchcraft TA5F connector on the microphone cable or input adapter cord .See the separate sheet titled “Transmitter 5-Pin Input Jack Wiring” regarding the correct connections forvarious microphones, and other sources.ON/OFF SWITCHTurns the battery power on and off. Even when the switch is turned off or on abruptly, the digital muting prevents“thumps” or transients from occurring.“ON” LAMPGlows brightly when the battery is good and the ON/OFF switch is ON. This tri-color LED will indicate the conditionof the battery in the transmitter as follows: Green - battery good Yellow - battery getting low Red - battery very low - change nowBlinking Red - battery critical - failure imminentFREQUENCY ADJUST (located under the sliding door)These two rotary switches adjust the center frequency of the carrier. The 1.6M is a coarse adjustment and the 100Kis the fine adjustment. Each transmitter is factory aligned at the center of its operating range. The default position ofthe frequency select switches is in the center of the transmitter’s range.Since the internal circuits are all tightly regulated and the RF output stage is powered by a regulated supply, thetransmitter will continue to operate perfectly to a battery voltage of 5.5 Volts.Please note that a weak battery will sometimes light the POWER LEDimmediately after turn on, but will soon discharge to the point where theLED will indicate a weak battery, just like a flashlight with “dead” batteries.The combination of an accurate battery condition indicator and regulation of allinternal circuits provides much longer battery life, as well as consistent perfor-mance over the life of the battery.0123456789ABCDEF0123456789ABCDEF
7Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USAAUDIO LEVEL CONTROLUsed to adjust the audio input level for proper modulation.AUDIO LEVEL LEDSIndicate the proper setting of the MIC LEVEL control.The two audio level LED’s are bi-colored (red/.green) and indicate 5 levels -Off - Off no audio modulationGreen - Off low audioGreen - Green moderate audioYellow - Yellow full audioRed - Red limitingANTENNAThe flexible wire antenna supplied with the transmitter is cut to 1/4 wavelength of the center of the frequency block(the frequency range) of the transmitter. It is removable via an SMA connector. The SMA connector is a 50 Ohm RFport which can also be connected directly to test equipment. Replacement antennas are available in pre-cut lengthsfor specific frequency blocks, or as a kit with instructions to cut the antenna for any frequency block.ADJUSTABLE LOW FREQUENCY ROLL-OFFA 18dB per octave low frequency roll-off is provided in the audio section, with the -3dB point adjustable from 35Hz to150Hz. The actual roll-off frequency will vary somewhat according to the low frequency response of the mic capsulebeing used.The low frequency roll-off control is used to reduce the undesirable effects of very low frequency audio often pro-duced by air conditioning systems, automobile traffic and other sources. Excessive low frequency content in theaudio input can cause overload of the program audio in recording applications. In sound reinforcement systems,excessive low frequency content can cause excessive power amplifier drain or even damage to loudspeaker sys-tems. A common example is wind blowing across a microphone, causing very high levels of low frequency audio(“wind noise”). By rotating the roll-off control clockwise, the hinge point of the roll-off is increased to reduce the levelof low frequencies. In low noise situations, such as a motion picture production set indoors where environmentalnoise is minimal, the control can be rotated counter-clockwise to permit low frequency audio to be captured.THE BELT CLIPThe belt clip may be removed for special applications by removing one screw.USE ONLY THE SCREW THAT IS SUPPLIEDThe circuitry is tightly packed into this unit. A longer screw will permanently damage the transmitter! Use onlyLectrosonics PN:28528 which is a Phillips head, 4-40 x 3/16", FL100 screw.
8BATTERY INSTALLATIONThe transmitter is powered by a standard alkaline or lithium 9 Volt battery. It is important that you use ONLY anALKALINE or LITHIUM battery for longest life. Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not adequate. Ni-cad rechargeable batteries will only provide 1.5 hours of operation, or less, and willrun down quite abruptly. Unless it is cold, alkaline batteries provide over 4.5 hours of operation. Lithium batteriescan be used to provide up to 14 hours. Care should be taken not to leave a fully discharged lithium battery in thetransmitter, as swelling of the battery can make it difficult to remove from the compartment. The battery statuscircuitry is designed for the voltage drop over the life of alkaline batteries.To open the battery compartment, press outward on the cover door in the direction of the arrow as shown in thedrawing. Only firm, sliding pressure is needed to open and close the battery door. Swing the door open and takenote of the polarity marked inside showing the location of the positive (+) and negative (-) terminals. You can see thelarge and small contact holes inside the battery compartment with the door open.Insert the battery correctly and close the cover by pressing the door closed and across, reversing the openingprocedure illustrated above. If the battery is inserted incorrectly, the door will not close. Do not force the doorclosed.OPERATING INSTRUCTIONS1) Install a fresh battery according to the instructions above.2) Insert the microphone plug into the input jack, aligning the pins; be sure that the connector locks in.3) Attach the antenna to the SMA connector on the top of the transmitter.4) Mute the sound system.5) Turn the transmitter power switch to the “ON” position.6) Position the microphone in the location you will use in actual operation.7) While speaking or singing at the same voice level that will actually be used, observe the MODULATION LEDs.Adjust the AUDIO LEVEL control knob until the LEDs begin to light. Start at a low setting where neither LEDlights as you speak.Swing thedoor openPress outward on thebattery door in thisdirection
9Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USAOPERATING NOTESThe AUDIO LEVEL control knob 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.If the audio level is too high — both LEDs will be Red frequently or stay Red. This condition may reduce the dynamicrange of the audio signal.If the audio level is too low — neither LED will light, or only one LED will flicker Green. This condition will reduce thesignal to noise ratio of the system.The input limiter will handle peaks up to 30dB above full modulation. Occasional limiting is desirable, indicating thatthe gain is correctly set and the transmitter is fully modulated for optimum signal to noise ratio.Different voices will usually require different settings of the AUDIO LEVEL control, so check this adjustment as eachnew person uses the system. If several different people will be using the transmitter and there is not time to makethe adjustment for each individual, adjust it for the loudest voice.ADJUSTING THE TRANSMITTER FREQUENCYIf you are experiencing interference from another signal on your frequency, you may want to change the operatingfrequency of your system. The left switch changes the operating frequency by 1.6 MHz per step and the right switchchanges it 100 kHz per step. If you are experiencing interference, change the operating frequency in 100 kHz stepsto find a clear channel. If it is not possible to find a clear channel using the 100 kHz switch, return it to its originalposition and change the 1.6 MHz switch by one click then try the 100 kHz switch again.To gain access to these switches, slide the access door sideways with a fingerrnail.The UDR700 receiver front panel will indicate the correct switch settings to match the receiver frequency.0123456789ABCDEF0123456789ABCDEF
10MICROPHONE CORD TERMINATION12345VIEW FROM SOLDERSIDE OF PINS0.3"0.15" HeatshrinkTubingTA5F Connector AssemblyMic Cord Stripping InstructionsCaution!Do not allow the shield wire to touch any metal part of the connector shell.The shield wire is the antenna on VHF models and poor operating range will result.Shield WireCrimpTabsRubberInsulationCrimpTabsRubberInsulation
11Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USA5-PIN INPUT JACK WIRINGThe wiring diagrams shown on the next page represent the basic wiring necessary for the most common types ofmicrophones and other audio inputs. Some microphones may require extra jumpers or a slight variation on thediagrams shown.Caution - When wiring the connector, do not use the connector body for any electrical connections.A common mistake is to use the connector body as an audio ground. The connector body isalready used as an RF ground on VHF models and no other use is permitted.It’s virtually impossible to keep completely up to date on changes that other manufacturers make to their products. Itis possible that you may encounter a microphone that differs from these instructions. If this occurs please call ourtoll-free number listed in the back manual. Our service department can answer your questions regarding micro-phone compatibility.When used on a wireless transmitter, the microphone element is in the proximity of the RF coming from the transmit-ter. The nature of electret microphones makes them sensitive to RF, which can cause problems with the microphone/transmitter compatibility. If the electret microphone is not designed properly for use with wireless transmitters, it maybe necessary to install a chip capacitor in the mic capsule or connector to block the RF from entering the electretcapsule. This modification is shown on the next page.VHF transmitters use the shield of the microphone cord as the antenna. The UM700 uses a 1/4 wave flexible wire toradiate the RF signal. There is really not much difference between these two approaches, with respect to the effectof the RF on the microphone capsule. Even in transmitters that utilize a “dangling wire,” the microphone is still partof the “ground plane” and is therefore still in the antenna circuit.PIN 1 Shield (ground) for positive biased electret lavalier microphones. For the increasingly rare negative biasedelectret lavaliere microphones, it is the bias voltage source. It is also the shield (ground) for dynamic micro-phones and line level inputs.PIN 2 Shield (ground) for negative biased electret lavalier microphones. Bias voltage source for positive biasedelectret lavaliere microphones.PIN 3 Low impedance microphone level input for dynamic microphones. Also accepts hand-held electret micro-phones that have their own battery or power supply.PIN 4 1K Ohm source load for non-Lectrosonics electret microphones. Use in conjunction with other pins toprovide attenuation of high level input signals.PIN 5 10k high impedance, line level input for tape decks, mixer outputs, musical instruments, etc.TransmitterInput Jack43215LECTROSONICS1uH10K1K51004321330PF330PF+5V Mic Bias5mA maxTo Mic AmpPOS BIAS (OR GND)MICSOURCE LOADLINE INNEG GND (OR BIAS)UHF Transmitter Equivalent Input Circuit
12RF 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 wires inside the TA5F connector housing.Install the capacitors as follows: Use 330 pF capacitors. Capacitors are available from Lectrosonics. Please specifythe part number for the desired lead style.Leaded capacitors: P/N 15117 Leadless capacitors: P/N SCC330PAll Lectrosonics lavalier mics are already bypassed and do not need any additional capacitors installed for properoperation.BODY GROUNDCaution - When wiring the connector, do not use the connector body for any electrical connections. A commonmistake is to use the connector body as an audio ground. The connector body is already used as an RF ground onVHF models and no other use is permitted.LINE LEVEL SIGNALSThe normal hookup for line level signals is: Signal Hot to pin 5, Signal Gnd to pin 1, pin 4 jumped to pin 1, and pin 3jumped to pin 1. This gives a 40dB attenuator that allows signal levels much higher than 3V to be applied withoutlimiting.If more headroom is needed, insert a 100k resistor in series with pin 5. Put this resistor inside the TA5F connector tominimize noise pickup.If lower than normal line levels (less than 1V) are expected, use this hookup: Signal Hot to pin 5, Signal Gnd to pin1, and pin 4 jumpered to pin 1. This provides a 20dB attenuator allowing signals as high as 3V to be applied withoutlimiting.WIRING HOOKUPS FOR DIFFERENT SOURCES3 WIRE MIC2 WIRE MICCAPSULE CAPSULESHIELDAUDIOSHIELDAUDIOBIASTA5FCONNECTORTA5FCONNECTORPreferred locations for bypass capacitorsAlternate locations for bypass capacitorsPIN54321SHIELDAUDIOBIAS3 WIRE ELECTRET MICPOSITIVE BIAS12345TA5FPLUG12345PINSHIELDAUDIO2 WIRE ELECTRET MICPOSITIVE BIAS12345TA5FPLUG12345PINSHIELDBIASAUDIO3 WIRE ELECTRET MICNEGATIVE BIAS12345TA5FPLUG12345PINSHIELDAUDIO2 WIRE ELECTRET MICNEGATIVE BIAS12345TA5FPLUGSHIELDTIPPIN54321SLEEVELINE LEVELRCA or 1/4 " PLUGAUDIO 12345TA5FPLUG312DYNAMICMIC LEVEL12345321PIN PINSHIELDDynamic LO Z mic or electret withmanufacturers power supply.12345TA5FPLUG(See notes on ‘LINE LEVEL SIGNALS” above.)
13Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USAA6U UHF ANTENNAThis is a full size cutting template. Lay the actual antenna on top of this drawing and cut at themark for the desired frequency group.Kits are shipped from the factory with caps of the various colors plus a black cap. After cutting the antenna to thedesired block length, select the properly colored cap and cut off the closed end to make the colored sleeve. Slide thecolored sleeve onto the antenna as shown above then slide the black cap onto the cut end of the antenna.FREQUENCY ANT SLEEVE ANTENNABLOCK RANGE COLOR WHIP LENGTH21 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"30 768.000 - 793.500 Orange/Black 3.08"31 793.600 - 819.100 Orange/Brown 2.99”32 819.200 - 844.700 Orange/Red 2.92”33 844.800 - 865.000 Orange/Orange 2.87”The sleeve color follows the standard resistor color code for the secondnumeral in the group number.*IMPORTANTWhip LengthMeasure the length of the whip that protrudes outside of the SMA connector.3332 3121222324252627282930Install cap on end of antennaafter cutting to length.Frequency BlocksColored sleeveBlack cap
14TROUBLESHOOTINGBefore going through the following chart, be sure that you have a good battery in the transmitter. It is important thatyou follow these steps in the sequence listed.SYMPTOM POSSIBLE CAUSETRANSMITTER BATTERY LED OFF 1) Battery is inserted backwards.2) Battery is dead.NO TRANSMITTER MODULATION LEDs 1) Gain control turned all the way down.2) Battery is in backwards. Check power LED.3) Mic capsule is damaged or malfunctioning.4) Mic cable damaged or mis-wired.RECEIVER RF LAMP 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) Operating range is too great.6) Transmitter antenna not connectedNO SOUND (OR LOW SOUND LEVEL),RECEIVER MOD LEVEL LEDs ARE ON 1) Receiver output level set too low.2) Receiver output is disconnected; cable is defectiveor mis-wired.3) Sound system or recorder input is turned down.DISTORTED SOUND 1) Transmitter gain (audio level) is far too high. Check modlevel lamps on transmitter and receiver as it is being used.(refer to pages 8/9 for details on gain adjustment)2) Receiver output may be mis-matched with the soundsystem or recorder input. Adjust output level on receiverto the correct level for the recorder, mixer or soundsystem.3) Excessive wind noise or breath “pops.” Re-positionmicrophone and/or use a larger windscreen.4) Transmitter is not set to same frequency as receiver.Check that frequency select switches on receiver andtransmitter match.HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) far too low.2) Receiver antenna missing or obstructed.3) Transmitter antenna missing.4) Operating range too great.EXCESSIVE FEEDBACK 1) Transmitter gain (audio level) too high. Check gainadjustment and/or reduce receiver output level.2) Transmitter too close to speaker system.3) Mic is too far from user’s mouth.
15Frequency Agile UHF Belt-Pack TransmitterRio Rancho, NM – USASPECIFICATIONS AND FEATURESOperating Principle: Proprietary digital modulation with encryptionOperating frequencies: 525.000 to 870.000 MHz depending upon local regulationsFrequency selection: 256 frequencies in 100kHz stepsRF Power output: 50 mW (nominal)Frequency stability: ± 0.001%Equivalent input noise: –126 dBVInput level: Nominal 2 mV to 300 mV, before limiting.Spurious radiation: 70 dB below carrierInput Level: Nominal 2 mV to 300 mV before limitingGreater than 30 V maximum with limitingInput impedance: Taps provided for 100, 1k, 10k OhmInput compressor: Dual-envelope limiter; 30 dB rangeGain control range: 43 dB; semi-log rotary controlModulation indicators: Dual multi-color LEDs indicate modulation level in 5 steps at-20, -10, -5, 0, +5 dB with green, yellow and red indicationsLow frequency roll-offadjustment: –18dB/octave; 35Hz to 150HzControls: 2 position “OFF-ON” slide switch for noiseless turn on/turn off operation.Front panel knob adjusts audio gain. Recessed control on side paneladjusts low frequency rolloff. Rotary switches on side panel adjusttransmitter frequency.Audio Input Jack: Switchcraft 5 pin locking (TA5M)Antenna: Detachable, flexible 1/4 wave cable. 50 Ohm port allowsconnection to test equipment.Battery: Precision compartment auto-adjusts to accept any known alkaline 9 Voltbattery. (We’ve tried over 150 different ones!)Battery Life: 4.5 hours (alkaline); 14 hours (lithium)Weight: 6.3 ozs. including batteryDimensions: 3.1 x 2.4 x .75 inchesEmission Designator: 180KQ2E
16Specifications subject to change without notice.SERVICE AND REPAIRIf your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipmentneeds repair. Make sure you have followed the setup procedure and operating instructions. Check out the intercon-necting cords and then go through the TROUBLE SHOOTING section in the manualWe strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shopattempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose 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.RETURNING UNITS FOR REPAIRYou will save yourself time and trouble if you will follow the steps below:A. DO NOT return equipment to the factory for repair without first contacting us by letter or by phone. We need 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.com Email: sales@lectrosonics.com
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LIMITED ONE YEAR WARRANTYThe equipment is warranted for one year from date of purchase against defects inmaterials or workmanship provided it was purchased from an authorized dealer.This warranty does not cover equipment which has been abused or damaged bycareless handling or shipping. This warranty does not apply to used or demonstratorequipment.Should any defect develop, we will, at our option, repair or replace any defectiveparts without charge for either parts or labor. If we cannot correct the defect in yourequipment, we will replace it at no charge with a similar new item. We will pay forthe cost of returning your merchandise to you.This warranty applies only to items returned to us, shipping costs prepaid, within oneyear from the date of purchase.This warranty gives you specific legal rights. You may have additional legal rightswhich vary from state to state.LECTROSONICS, INC.581 LASER ROADRIO RANCHO, NM 87124 USAwww.lectrosonics.comMarch 26, 2001

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