Lectrosonics UT700 WIRELESS MICROPHONE TRANSMITTER User Manual ut700man pmd

Lectrosonics Inc WIRELESS MICROPHONE TRANSMITTER ut700man pmd

USERS MANUAL

UT700ENCRYPTED DIGITALUHF HANDHELD TRANSMITTERLECTROSONICS, INC.Rio Rancho, NMwww.lectrosonics.comOPERATING INSTRUCTIONSand trouble-shooting guide
2UT700LECTROSONICS, INC.INTRODUCTIONThe 700 Series wireless system provides a combination of outstanding audio qualityand secure encryption. This unique combination makes the 700 Series equallysuitable for high-end studio and stage applications, and for corporate and govern-ment applications where security is a concern.Several advantages are provided by a digital wireless system:• A digital radio system provides outstanding signal to noise ratio.• The signal to noise ratio of a digital radio system stays constant all the way out tothe end of the usable range of RF signal strength.• A DSP controlled analog limiter provides superior level control.• Eavesdropping is extremely difficult due to the secure encryption.The UT700 is an integral microphone/transmitter with an internal antenna. Theantenna is a dipole type utilizing the two printed circuit boards as the elements. Thehousing is composed of durable PVC, machined to a natural, comfortable shape.Internal mechanical parts are machined aluminum and brass.Only the UT700 transmitters are covered in this manual. Companion receivers arecovered in separate manuals.TABLE OF CONTENTSThe UT700 transmitter is FCC type accepted under Part 74: 470-608MHz and 614-802MHzINTRODUCTION ................................................................................................... 2GENERAL TECHNICAL DESCRIPTION ............................................................. 3CONTROLS AND FUNCTIONS ........................................................................... 6VARIMIC CONTROLS ........................................................................................... 8BATTERY INSTALLATION .................................................................................. 10OPERATING INSTRUCTIONS ........................................................................... 11OPERATING NOTES........................................................................................... 11ADJUSTING THE TRANSMITTER FREQUENCY ............................................ 11TROUBLESHOOTING......................................................................................... 12SPECIFICATIONS AND FEATURES ................................................................. 14SERVICE AND REPAIR ...................................................................................... 15RETURNING UNITS FOR REPAIR.................................................................... 15WARRANTY ........................................................................................... Back cover
3Digital Frequency Agile UHF Hand-held TransmitterRio Rancho, NM – USAGENERAL TECHNICAL DESCRIPTIONGENERALThe 700 series encrypted digital wireless microphones use an all-digital communications link for excellent soundquality and data security.In the transmitter, the audio first passes through a DSP-controlled dual envelope analog limiter. The signal is thendigitized and fed to a DSP (digital signal processor). The DSP uses a proprietary audio encoding scheme to lowerthe bit rate and provide the high entropy required for secure encryption. The bit stream is then encrypted, appor-tioned into packets, and sent over the air using a proprietary digital modulation scheme.In the receiver, the digital baseband signal is demodulated to recover the original bit clock and data stream. TheDSP separates out the packet headers and decrypts the audio data. The audio data is then decoded to recover theoriginal audio signal.DSP-CONTROLLED DUAL ENVELOPE ANALOG LIMITERIn order to make the very best use of the high quality A/D converter, microphone audio is limited in the analogdomain first before being sampled. The DSP controls this process, but because the limiting is done in analog, levelsnear the converter’s maximum may be used without fear of clipping.The limiter has a fast attack, but different release characteristics, depending on the nature of the signal that drovethe input into limiting. Brief transients result in a fast decay, to avoid “pumping” effects, while sustained loud signalsresult in a slower decay, to keep distortion to a minimum. The result is a transparent-sounding limiter with excellentlow distortion characteristics.DIGITAL SIGNAL PROCESSING AND MODULATIONThe preamplified and limited audio signal is converted to digital using a 24-bit A/D converter and fed to the DSP.Within the DSP, the audio is encoded to reduce the bit rate and increase entropy in the data stream prior to encryp-tion. The data stream is then encrypted and apportioned into packets, delimited by packet headers. The completebit stream is modulated onto the carrier using a modified pi/4 DQPSK (differential quadrature phase shift keying)method. This modulation method makes efficient use of the RF spectrum and is easy to demodulate reliably.PhaseLockedLoopFreqSwitches11001001A-DConverterDigital Signal ProcessorShuntLimiterBicolorModulationLEDsMicroprocessor9VBatterySwitchingPowerSupply+3.3v+1.8v+9v-3v50IsolatorAudioBicolorPowerLEDAudioLevelInputAmpLFRolloffDigital ModulatorRFAmpDualEnvelopeLimiterEncode EncryptVoltageControlledOscillatorEncryptionKey LinkPreampMicElementPreampLevelTone
4UT700LECTROSONICS, INC.RF 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 multichannel wireless systems when an IM signal fallson the carriers, IF frequencies, local oscillator and image frequencies of the systems being operated. To eliminatethis problem in the UT700, the modulated radio signal passes through a circular isolator before entering the antenna.The circular isolator functions like a “one-way check valve” to allow the RF signal to pass through to the antenna, butnot to pass backwards into the amplifier stage. RF signals from other nearby transmitters cannot reach the outputamplifier in the UT700. This provides 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 UT700 transmitter section uses a synthesized, frequency selectable main oscillator The frequency is extremelystable over a wide temperature range and over time.ENCRYPTION SYSTEMThe 700 Series employs state-of-the-art 128-bit encryption for exceptional data security. (128-bit encryption meansthere are 300 trillion, trillion, *trillion* possible keys, assigned with equal probability.) The system offers three levelsof security, trading off ease of use for immunity to attack.LEVEL 1 offers the most intuitive operation. Once the key has been set, the equipment may be operated exactly thesame as a traditional analog system. The transmitter and receiver may be powered on in any sequence, and thetransmitter may move in and out of range without consequence (except normal squelching). Security in this mode isexcellent, but the scrambling sequence repeats approximately every 20,000 bits, theoretically exposing the user todifferential attacks. Due to its ease of use and quite effective security, level 1 is the default security level.LEVEL 2 offers much greater encryption strength, at the cost of slightly less intuitive operation. In level 2, thescrambling sequence never repeats (i.e. the PRNG is free-running), so the receiver must be on and ready to receivewhen the transmitter is first switched on. Some signal loss is tolerated but if the transmitter should wander out ofrange for more than ten seconds, it will be necessary to switch it off and on again to restart the sequence,resynchronizing with the receiver. Security in this mode is a great deal stronger than level 1, since the scramblingsequence never repeats. Only if the sequence is deliberately reused (i.e. by cycling transmitter power after prolongedsignal loss, or by reusing the same key session after session) is a differential attack possible even in theory.LEVEL 3 offers the strongest encryption of all, again at the cost of some convenience. Level 3 is much like level 2,except that the equipment itself enforces a policy that NO PORTION OF ANY SCRAMBLING SEQUENCE SHALLEVER BE USED MORE THAN ONCE. This is a fundamental tenet of cryptography: key reuse leads to vulnerability.Thus, level 3 security is about as close to the holy grail of the one-time pad as any wireless vendor is likely to offer ata reasonable price. Operation is a little different in level 3:•The transmitter starts sending immediately after receiving a key ONLY. It does not send when first powered on.•Only one transmitter may receive each key.•If the transmitter is out of range of the receiver for more than ten seconds, it will be necessary to generate anew key in order to continue using the system.All three levels offer strong encryption, so each user may make a policy decision based on an assessment of risk.Those requiring ease of use may relax, knowing that eavesdropping is extremely difficult even in level 1. Many usersmay find level 2 to be just as convenient, allowing them to use greater encryption strength. Those users willing tofollow stricter security procedures can use level 3, the strongest encryption available today from a wireless micro-phone.
5Digital Frequency Agile UHF Hand-held TransmitterRio Rancho, NM – USAMICROPHONE ELEMENTThe UT400 includes the Lectrosonics VariMic mic element. The VariMic is a cardioid condenser back electretmicrophone that is adapted for the unique circumstances of wireless microphones. The problems it solves aredynamic range, handling noise and low frequency noise (rumble or wind).In the VariMic, an unusual pumped source FET circuit increases the usable dynamic range 12dB and greatly reducesdistortion, just as if the FET were being supplied with 48 Volts. In addition, a unique 16 position sensitivity control atthe element itself can adjust the sensitivity in 15 steps over a 15 dB range. This is in addition to the normal gaincontrol in the wireless microphone. The result is the widest dynamic range of any condenser mic in a wirelessmicrophone.The VariMic has a three point damped rubber suspension to reduce high frequency handling noise and a generoussized windscreen to keep wind noise and breath pops away from the microphone.
6UT700LECTROSONICS, INC.Encryption Key LinkPower SwitchPower LEDCONTROLS AND FUNCTIONS“P” SWITCH – POWER ON/OFFA slide switch (located on the outside bottom of the unit)which turns battery power on and off.The Power LED glows green when the battery is good andthe ON/OFF switch is ON. The lamp will glow red as thebattery voltage drops and finally flashes when there isabout 30 minutes of operation left with the recommendedalkaline battery. A NiMh battery will give little or no warningwhen it is depleted. If you wish to use NiMh batteries in theunit, we recommend trying fully charged batteries, notingthe length of time that the batteries will run the unit and inthe future use somewhat less than that time to determinewhen the battery needs to be replaced. A weak battery willsometimes light the POWER LED to the “good” greenindication immediately after being put in the unit, but willsoon discharge to the point where the LED will go red orshut down, just like a flashlight with “dead” batteries. If thelamp fails to light, the battery should be replaced.ENCRYPTION KEY LINKThis jack is used to connect the transmitter to the receiverto generate an encryption key. Since this handheld transmitter doesn’t have a mic connector, this jack is provided tointerconnect with the receiver using a special cable for keygeneration. Please refer to the receiver manual for furtherdetails.LED POWERUP SEQUENCEThe UT700 is unique among 700 series transmitters in thatits audio LEDs are located under a cover and often aren’tvisible. Because of this, the blink code indicating thecurrent operating mode is issued using the power LEDinstead of the audio LEDs.LOCKED MODEThe UT700 can be placed in a locked mode where neitherthe power switch nor the frequency switches have anyfurther effect on operation. This protects the unit fromaccidental poweroff or misadjustment after it has beenprepared for use.To enter locked mode, toggle the power switch off and on again rapidly three times. (Each toggle must take no longerthan two seconds and no more than ten seconds may elapse between successive toggles.) During the first twotoggles, the power LED will behave normally, blinking slowly red while the switch is in the off position to warn that thepower will go off, then returning to normal battery status indication when the switch is on again. After the third toggle,the power LED will go out briefly, then blink the code that indicates the current mode (in red, indicating locked mode),just as it does when the unit is first powered on. This blink code reprise (in red) serves as a confirmation that theswitches are now locked.Locked mode can be cleared by removing the battery. Note that removing the battery bypasses the normal delayedpoweroff circuit, so it may cause noise at the receiver.Audio Level LEDs-20 -10Frequency SwitchesCoarse FineAudio Level
7Digital Frequency Agile UHF Hand-held TransmitterRio Rancho, NM – USAHIDING THE POWER LEDThis unit has no provision for disabling the LEDs. The audio LEDs are coveredduring normal use but the power LED is exposed. If the light is objectionable, werecommend covering the LED with a piece of tape.FREQUENCY ADJUSTTwo rotary switches (located under the battery door) adjust the center frequencyof the carrier. The Coarse adjustment adjusts the frequency in 1.6 MHz stepsand the fine in 100 kHz steps. Each transmitter is factory aligned at the center ofits operating range for uniform operation across the entire band. The defaultposition of the frequency select switches is in the center of the transmitter range.MOD LEVEL LEDsThese LEDs (located under the battery door) indicate the proper setting of the MIC LEVEL control. There are twobicolor modulation LEDs that can light either red or green. “-20dB level” One modulation LED glows green and the transmitter is 20 dB below full modulation.“-10 dB level” Both modulation LEDs glow green and the transmitter is close to full modulation.“+0 dB level” The -20 LED glows red and the -10 LED glows green. The transmitter is in slight limiting and isfully modulated. This is probably desirable. See the discussion below under Input Limiter.“+10 dB level” Both LEDs are red. The transmitter is in limiting and you may want to reduce the transmitter audiogain. See the discussion below under Input Limiter.INPUT LIMITERThe 700 series transmitters employ a digitally-controlled analog audio limiter just before the analog-to-digital con-verter. The limiter has a range of more than 30dB for excellent overload protection. A dual release envelope makesthe limiter acoustically transparent while maintaining low distortion. It can be thought of as two limiters in series,connected as a fast attack and release limiter followed by a slow attack and release limiter. The limiter recoversquickly from brief transients, so that its action is hidden from the listener, but recovers slowly from sustained highlevels, to both keep audio distortion low and preserve short term dynamic changes.The audio level LEDs indicate limiter activity. The first red LED indicates that the limiter is active and that the trans-mitter is fully modulated (audio level is between +0 and +10 dB). The second red LED indicates that the level is10dB or more into limiting. Occasional forays into the red are desirable for most applications, since the distortionintroduced by the limiter is so minimal, and full modulation is thus assured. We strongly recommend setting the gainof the transmitter high enough so that the first red LED occasionally lights. Generally speaking, some limiting is desirable in normal operation to improve the signal to noise ratio of the system.The limiting action is not audible and does not create distortion. A highly trained ear would hear only the compres-sion of the peaks in the audio signal, which is desirable with most recorders and many sound reinforcement systems.AUDIO LEVELThis knob (located under the battery door) is operated while speaking or singing into the transmitter to adjust theaudio gain of the transmitter for the correct amount of modulation. The LEDs located next to it indicate the modula-tion level as the gain is adjusted. See the Operating Instructions section for details on this very importantadjustment.Coarse Fine89ABCDEF0123456789ABCDEF01234567
8UT700LECTROSONICS, INC.VARIMIC CONTROLSCaution - Due to the high RF levels surrounding thetransmitter, the sound of the Varimic capsule may betemporarily affected if the metal windscreen is not inplace. Always make the final decision about soundbalance and quality with the windscreen in place.Preamp Level ControlBass (LO) Mid (MID) Treble(HI)+100dB-10 10Hz 100Hz 1KHz 10KHz+5-5UT200 Bass/Midrange/Treble Boost/CutThe VariMic head includes adjustments for Bass,Midrange and Treble response. There is also an attenua-tion adjustment to provide up to 15dB of additional head-room if needed.BASS / MID / TREBLE (LO / MID / HI)The bass and treble controls will boost/cut by up toapproximately 8dB while the Mid control will boost/cut upto about 6dB. These controls operate as standard tonecontrols. Counter-clockwise will reduce the response inthat band and clockwise will provide a true boost. Thesecontrols can be accessed by removing the windscreen.To remove the windscreen, grasp the body of the trans-mitter in one hand and the windscreen in the other hand.Carefully unscrew the wind-screen counter-clockwise untilit comes off then carefully slide the windscreen past themic element.• Set flat, the mic capsule is very wide range and soundsa lot like a large competitor’s top line condenser mic.• Bass cut gives a dry but highly intelligible sound. Crisp.• Bass boost “fattens” the sound but is very listenable.Does not get midbass boomy.• Midrange cut sounds very smooth. Almost a “crooner”quality. A sweet sound.• Midrange boost is likely to be useful in a system that ismidrange shy.• Treble cut has a “mellow” sound. The capsule has asolid high end so a little cut does not ruin the response.• Treble boost might be fine on some sound systems. Thesound doesn’t get harsh (showing that the response wassmooth) but sibilants are a little too much. Should beused in moderation.PREAMP LEVEL CONTROLThe VariMic head includes an attenuator to provide anadditional 15dB of headroom when needed. The attenua-tor should only be used when the normal Mic Level pot isalready turned down as far as it will go and the signalthrough the mic is still too hot. The attenuator control is a16-position switch marked 0 through F. “F” is minimumattenuation or the highest signal level. “0” is maximumattenuation or the lowest signal level. For the maximumamount of headroom, set the switch to “0.”
9Digital Frequency Agile UHF Hand-held TransmitterRio Rancho, NM – USANote: The attenuator should not be used as a level control. The Audio Level control inside the batterycompartment is the main level control. Adjust the attenuator only when the Audio Level control is turnedcompletely down and more headroom is still needed. Be sure to set the attenuator back to its original setting fornormal operation.BASS FILTERIn addition to the tone controls, the UT700 also has a built in bass filter. This filter is fixed and cannot be adjusted ordefeated. Low frequency noise is much more of a problem with wireless microphones than with conventional micro-phones. With a regular mic, low frequency wind noise, breath thumps or handling rumble can be filtered out at thecontrol board before the noise causes problems with the following electronics or speaker systems. But with awireless microphone, the electronics that will be overdriven are right in the wireless microphone. Filtering at thecontrol board is much too late. To solve this problem, the VariMic has a low frequency filter that is so sharp that itcan remove low frequency noise without affecting any wanted vocals. It consists of a 36 dB per octave filter circuit tosharply remove low frequency noise below 75 Hz without affecting vocal fundamentals. The lowest operatic bassvoice fundamental is 82 Hz.200dB-20-40-6010Hz 100Hz 1KHz 10KHzVariMic Low Frequency Roll-off Filter-3dB @ 71Hz-20dB @ 50Hz
10UT700LECTROSONICS, INC.BATTERY 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.PP+–+–Pull RingOutwardRotate Ring1/8 TurnRemoveCoverInsertBatteryRotate Ring ToLock ClosedReplaceCoverRing will sit flush in theclosed position.Depress the plunger with the corner of the battery and slide the battery into the compartment. Note that the locking ring is in the closed position for this procedure.Alternate MethodSTEP 1STEP 2STEP 3STEP 4STEP 5STEP 6
11Digital Frequency Agile UHF Hand-held TransmitterRio Rancho, NM – USAOPERATING INSTRUCTIONSADJUSTING THE GAIN1) Install a fresh battery. Leave the battery cover off for further adjustment.2) On the bottom panel, move the “P” (power) switch to ON, toward the LED. Observe that the battery status LED isglowing green indicating a good battery. If the LED is glowing red, replace the battery.Note: If the security level is set to “2”, the receiver must be powered on before the transmitter.If the security level is set to “3”, communications do not begin until a fresh key is transfered.3) Hold the microphone in the same position that it will be used in actual operation.4) 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. At too low a setting neither LED will light asyou speak. Gradually, turn the gain up until the –20 dB LED lights green and then the -10 dB lights green. Westrongly recommend setting the gain of the transmitter even higher so that the first red LED occasionally lights.If you find that the AUDIO LEVEL control is set to minimum and the LIMIT LED is still on often, then adjust thepreamp level control. This control is located under the windscreen. Unscrew the windscreen and carefully lift itoff the top of the unit. See the VERIMIC CONTROLS section for these adjustments. If you need to change thesecontrols, be sure to repeat the gain adjustment procedure beginning at step 3.5) Once the gain has been adjusted, the audio system audio can be turned on to make level adjustments in themain audio system.SETTING THE ENCRYPTION KEYPlease refer to the receiver manual for instruction on setting the encryption key.OPERATING 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 red LEDs will light frequently or stay lit. This condition may reduce the dynamicrange of the audio signal.If the audio level is too low — neither LED will light, or only the -20 LED will light green. This condition may causehiss and noise in the audio.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, youmay want to change the operating frequency of your system. The left switchchanges the operating frequency by 1.6 MHz per step and the right switchchanges it 100 kHz per step. If you are experiencing interference, change theoperating frequency in 100 kHz steps to find a clear channel. If it is not possibleto find a clear channel using the 100 kHz switch, return it to its original positionand 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 finger-nail.The UDR700 receiver front panel will indicate the correct switch settings to match the receiver frequency.Coarse Fine89ABCDEF0123456789ABCDEF01234567
12UT700LECTROSONICS, INC.TROUBLESHOOTINGBefore 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, or too low to be used.NO TRANSMITTER MOD LEVEL LEDs 1) Gain control turned all the way down.2) Battery is in backwards. Check power LED.3) Mic capsule is damaged or malfunctioning. Contact thefactory for repair.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. Check labelson transmitter and receiver and the frequency switch settings.5) Operating range is too great.NO SOUND BUT RECEIVER AUDIO LEVELMETER INDICATES 1) Receiver audio is muted or set too low.2) Receiver audio output is disconnected or cabledefective or mis-wired.3) Sound system or recorder input is turned down.DISTORTED SOUND AND/ORMOTORBOATING 1) Transmitter gain (audio level) is too high. Speak or sing intothe transmitter and check mod level lamps on transmitter andreceiver.2) Receiver output level may be too high for the soundsystem or recorder input.3) Excessive wind noise or breath “pops.” Microphonemay require an additional wind screen.4) Transmitter frequency switches mis-set.5) RF feedback getting into VariMic mic capsule. Ensure that thewindscreen is present and screwed down snugly.HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) too low.2) Receiver antenna missing or obstructed.3) Operating range too great.4) Transmitter frequency switches mis-set.EXCESSIVE FEEDBACK 1) Transmitter gain (audio level) too high. Check gain adjustmentand/or reduce receiver output level.2) Microphone too close to speaker system.3) Move microphone closer to the user’s mouth, and lower thesound system volume.
13Digital Frequency Agile UHF Hand-held TransmitterRio Rancho, NM – USAMICROPHONE HAS A “WHINE” NOISE IN 1) Install bypass capacitors at both ends of the mic cableTHE BACKGROUND WHICH VARIES AS THE use the factory supplied microphone.MIC CABLE IS MOVEDRECEIVER OUTPUTS AN EXTREMELY LOUD, 1) Encryption keys in transmitter and receiver do not match.HISSY, SWISHY SOUND Refer to receiver manual to choose a new key and send itto the transmitter.NO AUDIO OUTPUT, AUDIO LEDS BLINK IN 1) System is in security level 3 and is not synchronized.SEQUENCE, LED DISPLAY SHOWS to correct this in security level 2, turn the transmitter off“POWER TX OFF+ON” OR “NEW KEY REQUIRED”then on again. In level 3, a new key must be generated.SECURITY FEATURES DIFFERENT FROM 1) This manual applies only to UDR700 version 3.0/3.0 andTHE DOCUMENTATION higher.
14UT700LECTROSONICS, INC.SPECIFICATIONS AND FEATURESOperating principle: Proprietary digital modulation with encryptionModulation type: Modified pi/4 DQPSKSample rate: 44.1 kspsAudio coder: Proprietary sub-band ADPCMEncryption key length: 128 bit (300 trillion trillion trillion keys)Bit rate: 220,500 bps including packet overheadOperating frequencies: 537.600 to 793.500 MHz depending upon local regulationsFrequency selection: 256 frequencies in 100kHz stepsRF Power output: 50 mW (nominal)Frequency stability: ± 0.001%Equivalent input noise: –119 dBV, A-WeightedSpurious radiation: 70 dB below carrierInput Level: Nominal 2 mV to 300 mV before limitingGreater than 1V maximum with limitingInput compressor: Dual-envelope limiter; 30 dB rangeGain control range: 43 dB; semi-log rotary controlModulation indicators: Dual multi-color LEDs indicate modulation level in 4 steps at-20, -10, 0, +10 dB with green and red indicationsLow frequency roll-offadjustment: –18dB/octave; 35Hz to 150HzControls: 2 position “ON-OFF” slide switch. Knob in battery compartment adjusts audio gain.Rotary switches in battery compartment adjust transmitter frequency.Battery: Precision compartment auto-adjusts to accept any known alkaline 9 Voltbattery. (We’ve tried 246 different ones!)Battery Life: 3.5 hours (alkaline); 6.5 hours (lithium)Weight: 12.4 ozs. with VeriMic capsule and lithium batteryDimensions: 9” long, x 2.05” diameter at largest point with VeriMic capsuleEmission Designator: 180KQ2ESystem SpecificationsAudio frequency response: 40Hz to 20kHz, +/- 1dBAudio dynamic range: >100 dB before limitingAudio Distortion: 0.05% THD + noise at 1kHzSpecifications subject to change without notice.
15Digital Frequency Agile UHF Hand-held 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. 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
LECTROSONICS, INC.581 LASER ROADRIO RANCHO, NM 87124 USAwww.lectrosonics.comFebruary 12, 2004LIMITED 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.LIMITED ONE YEAR WARRANTY

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