Lectrosonics UH400A user manual June 2004
Contents
1. NS P S i 2 y Bicolor pw Microprocessor Power LED Bicolor Modulation LEDs Freq Switches Phase Locked Loop Le Val so Isolator lt 0 Controlled Oscillator Transmitter UH400 Block Diagram INTRODUCTION The 400 system uses 75 kHz wide deviation for an ex tremely high signal to noise ratio The switching power supplies provide constant voltages to the transmitter cir cuits from the beginning 9 3 volts to the end 5 5 volts of battery life The input amplifier uses an ultra low noise op amp for guiet operation It is gain controlled with a wide range dual envelope input compressor which cleanly limits input signal peaks over 30 dB above full modulation DIGITAL HYBRID TECHNOLOGY All wireless links suffer from channel noise to some degree and all wireless microphone systems seek to minimize the impact of that noise on the desired signal Conventional analog systems use compandors for enhanced dynamic range at the cost of subtle artifacts known as pumping and breathing Wholly digital systems defeat the noise by sending the audio information in digital form at the cost of some combination of power bandwidth and resistance to interference The Lectrosonics Digital Hybrid Wireless system hereaf ter called Digital Hybrid overcomes channel noise in a dramatically new way digitally encoding the audio in the transmitter and decoding it in the receiver yet still sending2. 20 and 10 LEDs will blink e Once for 100 Series mode e Two times for 200 Series mode e Three times for mode 3 Contact Factory for Details e Four times for 400 Series mode The Compatibility Mode will remain set until changed with the above procedure ADJUSTING THE TRANSMITTER FREGUENCY If you are experiencing interference from another signal on your freguency you may want to change the operating freguency of your system This is done with the Freguency Switches The left switch changes the operating freguency by 1 6 MHZ per step and the right switch changes it 100 kHz per step If you are experiencing interference change the Freguency Agile Plug on UHF Transmitter operating freguency in 100 kHz steps to find a clear chan nel If it is not possible to find a clear channel using the 100 kHz switch return it to its original position and change the 1 6 MHz switch by one click then try the 100 kHz switch again BATTERY REPLACEMENT The UH400A transmitter is powered by a standard alkaline 9 volt battery It is important that you use ONLY ALKALINE OR LITHIUM batteries for longest life Standard zinc carbon batteries marked heavy duty or long lasting are not adeguate They will provide only about five minutes of operation Similarly ni cad rechargeable batteries only give one hour of operation and will also run down guite abruptly Alkaline batteries provide about 4 5 hours of operation while lithium batteries
3. Receiver output is disconnected cable is defective or mis wired Sound system input is turned down Transmitter gain audio level set too low Faulty microphone Phantom power not enabled for mic that requires it Transmitter gain audio level is far too high Check mod level lamps on transmitter and receiver as it is being used Refer to the Operating Instructions section for details on gain adjustment Receiver output may be mismatched with the sound system or recorder input Adjust output level on receiver to the correct level for the recorder mixer or sound system Excessive wind noise or breath pops Reposition microphone and or use a larger windscreen Transmitter is not set to same frequency as receiver Check that frequency select switches on receiver and transmitter match Transmitter gain audio level far too low Receiver antenna missing or obstructed Operating range too great Transmitter gain audio level too high causing the limiter to reduce the dynamic range which in turn causes feedback Check gain adjustment and or reduce receiver output level Refer to the Operating Instructions section for details on gain adjustment Transmitter too close to speaker system Mic is too far from user s mouth LECTROSONICS INC Operating freguencies Freguency selection RF Power output Pilot tone Freguency stability Deviation Spurious radiation Eguivalent in
4. The UH400A will operate with any 100 200 or 400 Series Lectrosonics receiver in the same freguency group TABLE OF CONTENTS GENERAL TECHNICAL DESCRIPTION lee onen naa naa naa n aa naa naa n aa naa naa 4 INTRODUCTION La os MEIGAN A tenes ONR ADRA EKA Sos K THE ATON Adn OR AAA iya sauku a saq asada sau SBA NNDR temi 4 DIGITAL HYBRID TECHNOLOGY ua GWYR nt p WYR Y aM ASE Du p 4 INPUT EIMITE N EF S REY a 4 NO PRE EMPHASIS DE EMPHASIS 5 PILOT TONE SOUELOCH iei e ina taken beni Ek OD FAN MERA AUETA OY E en 5 WIDE BAND DEVIATION PE B a fa mA 5 LONG BATTERY LIFE SMS KANA ONE NN yny FUN OM 5 FREQUENCY AGILITY aaa NC Ad ien vena DWFYR nakee a Bar saa aq kawsasha MY nnd FFA 5 POWER ORK EEN 6 POWER Seil elo eg CR EE 6 CONTROLS AND FUNCTIONS u u cee naa naa nana kaa ELLYLL a aa 6 PHANTOM POWER VOLTAGE SELECT SWITGH 6 FREQUENCY SELECT SWITCHES 7 INPUT JACK avata BEI a EA 7 MODULATION LEDS iiu ETWY mee kasaa RANNU RNA HRN agrada EB i a 7 COMPATIBILITY MODE INDICATORS uuu nannaa anna na annan naa eaa naan n aa Kaa Ln 8 MIG LEVEL mimiss cua de RT tossun tai EN ER a FN NEF Sa YE ATSA ANAKIN S
5. the encoded information via an analog FM wireless link This proprietary algorithm is not a digital implementation of an analog compandor but a technigue which can be ac complished only in the digital domain even though the inputs and outputs are analog signals As of this writing the patent is still pending so we cannot reveal detailed information about the algorithm at this time Channel noise still has an impact on received signal guality and will eventually overwhelm the receiver The Digital Hybrid simply encodes the signal to use a noisy channel as efficiently and robustly as possible yielding audio perfor mance that rivals that of wholly digital systems without the power and bandwidth problems inherent in digital transmis sion As always these advantages come at a cost The Digital Hybrid system reguires fairly intensive digital pro cessing in both the transmitter and the receiver These processors cost money take up space and consume power The Digital Hybrid system also reguires that the underlying RF link be of excellent guality with better freguency re sponse and distortion characteristics than that reguired by conventional systems Because it uses an analog FM link the Digital Hybrid enjoys all the benefits of conventional FM wireless sys tems such as excellent range efficient use of RF spectrum and long battery life However unlike conventional FM systems the Digital Hybrid has done away with the analog comp
6. for SNR without limiting by 4 5 dB 0 2 typical 400 Series mode Built in 9V alkaline or lithium 4 5 Hours with alkaline 9 Volt 12 hrs with lithium Battery life will vary with battery brand phantom power voltage setting and mic current drain 6 5 ozs with lithium battery no mic 1 5 x 1 5 x 4 2 inches Not including microphone 190KF3E Specifications subject to change without notice The FCC reguires that the following statement be included in this manual This device complies with FCC radiation exposure limits as set forth for an uncontrolled environment This device should be installed and operated so that its antenna s are not co located or operating in conjunction with any other antenna or transmitter Rio Rancho NM USA 13 UHaoo SERVICE AND REPAIR If your system malfunctions you should attempt to correct or isolate the trouble before concluding that the eguipment needs repair Make sure you have followed the setup procedure and operating instructions Check out the interconnect ing cords and then go through the TROUBLESHOOTING section in the manual We strongly recommend that you do not try to repair the eguipment yourself and do not have the local repair shop attempt anything other than the simplest repair If the repair is more complicated than a broken wire or loose connection send the unit to the factory for repair and service Don t attempt to adjust any controls inside the units Once set at the facto
7. freguency is chosen according to which of the 256 channels has been selected by the freguency switch setting The basic benefit of the pilot tone sguelch system is that the receiver will remain muted until it receives the pilot tone from the match ing transmitter even if a strong RF signal is present on the carrier freguency of the system The UH400 extends this concept even further by insuring that all transmitters in a system have different pilot tone freguencies so that even spurious RF from the wrong transmitters can t open the receiver sguelch WIDE BAND DEVIATION A 75 kHz deviation improves the capture ratio signal to noise ratio and AM rejection of a wireless system dramati cally compared to the more commonly used 15 kHz deviation LONG BATTERY LIFE Switching power supplies throughout the design allow over 4 5 hours of operation using a single 9 volt alkaline battery A 9 volt lithium battery will provide over 12 hours of operation The battery contacts are spring loaded to prevent rattle as the unit is handled FREGUENCY AGILITY The transmitter section uses a synthesized freguency se lectable main oscillator The freguency is extremely stable over a wide temperature range and over time Two rotary switches located on the side panel of the unit provide 256 freguencies in 100 kHz steps over a 25 5 MHz range This alleviates carrier interference problems in mobile or traveling applications UHaoo CONTRO
8. life remaining in either type of battery Note A NiMH battery will give little or no warning when it is depleted If you wish to use NiMH batteries in this unit we recommend installing a fully charged batteries noting the length of time that the batteries will run the unit and in the future use somewhat less than that time to determine when the battery needs to be replaced PWR OFF 15 Control Panel INPUT JACK 1 6MHz 100kHz POWER a a SWITCH wa Z FREQUENCY SWITCHES BEHIND DOOR PHANTOM POWER VOLTAGE SELECT RECESSED Side View A weak battery will sometimes light the POWER LED to the good green indication immediately after being put in the unit but will soon discharge to the point where the LED will go red or shut down just like a flashlight with dead batteries If the Power LED fails to light when power is applied replace the battery PHANTOM POWER VOLTAGE SELECT SWITCH This switch selects from three phantom voltages when the PWR switch is in the mid position The voltages are e 5 volts for lavaliere microphones 15 volts for some professional mics reguiring high current and for many common stage mics that will operate over a wide phantom voltage range of 12 to 48 volts With the proper adapter this position can also be used with T power microphones See our web site for details on finding or making the proper adapter 42 volts for microphones that do in fact reguire a
9. 0 se ries digital hybrid receivers or 200 and 100 Series analog receivers It is also capable of working with analog wire less receivers from other manufacturers contact the factory for details The transmitter can be easily set to the com patibility mode of the matching receiver using only the supplied screwdriver and a battery NOTE The UH400A is supplied from the factory as a 400 series transmitter 1 Ensure the battery is good If the Power LED lights up when the Power Switch is set to PHTM or NO PHTM the battery is good and correctly installed 2 Turn off the transmitter LECTROSONICS INC 3 With a small screwdriver included with your unit set the freguency change switches to CC for Change Change To gain access to these switches slide the access door open with a fingernail Left Switch 1 6 MHz Freguency Select switches Right Switch 100 kHz 4 Set the Power Switch to NO PHTM briefly just a couple of seconds for the front panel LED s to light up then immediately turn the unit off 5 Change the Freguency Select switches to one of the following settings MODE SWITCH SETTINGS 100 Series 1 1 200 Series 2 2 Mode 3 3 3 Contact factory for details 400 Series Digital Hybrid 4 4 6 Turn the transmitter on when the front panel LEDs light up immediately turn the unit off 7 Change the switches to 0 0 8 Energize the transmitter and verify the new compatibility mode The front panel
10. IAM TAKEN NF FFF CW SN RAI N 8 FREQUENCY BLOCKS AND RANGES iii ieor ne ne LL ELF FL kaman NNDR FELT vaa N YA LG NF adra 9 OPERATING INSTRUCTIONS AAA 10 ATTACHING THE MICROPHONE u FYDDWN on CANLYN denver 10 MIC LEVEL OPERATING ua nn inan naa 10 SELECTING THE COMPATIBILITY MODE sasan aan aa i 10 ADJUSTING THE TRANSMITTER FREQUENCY naa eaa ann K aa naan nana 11 BATTERY REPLACEMENT yri ea naita aak maan ivan eb nama Y HYFED Tng WYN TF 11 TROUBLESHOOTING EEN 12 SPECIFICATIONS AND FEATURES uei aanta FR vana EY YF annan A H 13 SERVICE AND REPAIR oni uu u pasayusqa asuaan Taika suma Tan Dob m L TK a evita aN sen aysa assqa 14 RETURNING UNITS FOR REPAIR uuu dk ap EF 14 LIMITED ONE YEAR WARRANTY u Back Cover The UH400 transmitter is FCC type accepted under Part 74 470 608MHz and 614 SO6MHz Rio Rancho NM USA 3 UHaoo GENERAL TECHNICAL DESCRIPTION 5V 15V 48V BIAS SUPPLY lt See Input Jack under Controls and Functions for details x es v es Pilot Tone 11001001 11001001 Shunt 4 mikit Digital Signal Processor oo gu o T 3 3V 3 2v gt 1 8v kb 6 3v Switching Power Supply
11. LS AND FUNCTIONS MODULATION LEDs 10 L 20 a AN POWER 3 K B NO PHTM Org PHTM LEVEL Top View This transmitter may be used with a wide variety of micro phones The 3 pin XLR connector allows the transmitter to be used with any dynamic microphone as well as many two wire positive bias lavaliere systems such as those systems supplied by Lectrosonics POWER SWITCH The three position OFF PHTM NO PHTM Power Switch turns the unit on or off and selects either phantom power or no phantom power Regardless of which position the switch is set the pilot tone muting system effectively pre vents thumps or transients from occurring during power up or power down The PHTM center position of the power switch turns on the phantom power value selected by the Phantom Power Voltage Select switch while the NO PHTM fully on posi tion disables phantom power Note In order to minimize accidents be careful to use the center PHTM position only when necessary and keep the Phantom Power Voltage Select switch in the 5 V position See Phantom Power Voltage Select switch POWER ON OFF LED This LED glows green when the battery is good When the lamp glows red there are about 30 minutes of operation left with the recommended lithium battery and about 20 minutes of battery life left with an alkaline battery The lamp will flash red when there are only a few minutes of
12. UH400A FREQUENCY AGILE PLUG ON UHF TRANSMITTER Featuring Digital Hybrid Wireless Technology U S Patent Pending OPERATING INSTRUCTIONS LECTROSONICS ING Rio Rancho NM www lectrosonics com UHaoo 2 LECTROSONICS ING Freguency Agile Plug on UHF Transmitter Thank you for selecting the Lectrosonics UH400A freguency agile plug on transmitter The UH400 combines over 80 years of engineering experience with the very latest components in a design that addresses the most demanding professional applications The design of the UH400A was the direct result of numerous conversations with users staging and touring companies and dealers across the US The specific concerns and needs brought up in these conversations led directly to the development of the operational features offered on the UH400A Two hundred fifty six frequencies are user selectable in 100 kHz steps to alleviate interference problems in travelling venues The UH400A is a rugged machined aluminum package Selectable voltage phantom power is provided allowing the UH400 to be used with the widest variety of microphones LEDs located on the UH400A front panel make guick and accurate level settings without having to view the receiver The battery compartment accepts any 9 volt alkaline or lithium battery and makes a positive connection via self adjusting contacts Only the UH400A transmitter is covered in this manual Companion receivers are covered in separate manuals
13. andor and its artifacts INPUT LIMITER The 400 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 30 dB for excellent overload protection A dual release envelope makes the limiter acoustically transparent while maintain 4 LECTROSONICS INC ing low distortion It can be thought of as two limiters in series connected as a fast attack and release limiter fol lowed by a slow attack and release limiter The limiter recovers guickly from brief transients so that its action is hidden from the listener but recovers slowly from sus tained high levels to both keep audio distortion low and preserve short term dynamic changes The Modulation LEDs indicate limiter activity When the 20 LED glows red and the 10 LED glows green with occasional red flickers this indicates that the limiter is active and that the transmitter is fully modulated audio level is between 0 and 10 dB When the 10 LED glows solid red this indicates that the level is 10 dB or more into limiting Occasional forays by the 10 LED into the red are desirable for most applications since the distortion intro duced by the limiter is so minimal and full modulation is thus assured We strongly recommend setting the audio level of the transmitter high enough so that the 10 LED occasionally flickers red Generally speaking some limiting is desirable in normal oper
14. ation 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 com pression of the peaks in the audio signal which is desirable with most recorders and many sound reinforcement sys tems NO PRE EMPHASIS DE EMPHASIS The signal to noise ratio of the 400 system is high enough to preclude the need for conventional pre emphasis HF boost in the transmitter and de emphasis HF roll off in the receiver Pre emphasis and de emphasis in an FM radio system usually provides about a 10 dB improvement in the signal to noise ratio of the system but the high freguency boost in the transmitter must be removed in a purely complementary manner or else the freguency re sponse of the original audio signal will be altered Pre emphasis can also cause distortion in the receiver As this signal is passed through the IF filters in the receiver distortion can be produced most noticeably at full modula tion De emphasis cannot be applied until the signal is converted into audio so there is no way around this prob lem short of eliminating pre emphasis altogether Neither of these problems occur in the 400 system Rio Rancho NM USA Freguency Agile Plug on UHF Transmitter PILOT TONE SOUELCH The 400 system utilizes one of 256 different ultrasonic tones between 25 and 32 kHz that modulate the carrier to operate the receiver sguelch The pilot tone
15. e actually used during the program Start with the Mic LEVEL control at maximum counterclockwise then observe the front panel Modulation LEDs Slowly turning the Audio LEVEL control clockwise while talking into the mic at the TO REMOVE same level that will be used during the program Increase the Mic LEVEL control until the 20 LED glows red and the 10 dB glows green with occasionally red flickers This indicates full modulation 6 Once the gain has been adjusted the remainder of the audio sound system can be energized and adjusted MIC LEVEL OPERATING TIP The Mic LEVEL control should not be used to control the volume of your sound system or recorder levels The Mic LEVEL control matches the transmitter gain with the user s voice level and mic s position If the audio level is too high both red LEDs will glow solid red This condition may reduce the dynamic range of the audio signal If the audio level is too low neither LED will glow or only the 20 LED will glow green This condition may cause hiss and noise in the audio Different voices will usually reguire different settings of the Mic LEVEL control so check this adjustment as each new person uses the system If several different people will be using the transmitter and there is not time to make the adjustment for each individual adjust it for the loudest voice SELECTING THE COMPATIBILITY MODE This unit is capable of working with Lectrosonics 40
16. e supply current is accidentally shorted to ground and also keeps the microphone from being attenuated by the power supply The UH400A im proves on those functions and is able to use less power from the battery by using constant current sources and current limiters With this dynamic arrangement the UH400A can also supply more than twice the current of competing 48 volt plug on units and provide four times the current to some very high end 18 volt microphones The 5 volt setting is provided for lavaliere microphones made by us and others Do not power lavalieres from the 15 or 48 volt setting as the microphone will be most likely destroyed Lectrosonics makes an adapter MCA5X that will adapt our standard TA5F 5 pin microphones to the UH400A This adapter also provides protection against excessive phantom voltage If voltages higher than 5 volts are applied to the adapter a Zener diode will shunt excess voltage to ground The microphone won t work until the voltage is correctly reduced to 5 volts If you have an older lavaliere mic that was wired directly to an XLR for use with the earlier UH200 s we strongly recommend building our protection circuit into the XLR to prevent accidental de struction of the lavaliere FREGUENCY SELECT SWITCHES Two 16 position rotary switches adjust the center freguency of the carrier within the transmitter s freguency block The 1 6 MHz is a coarse adjustment and the 100 kHz is the fine adjustment Each tran
17. ess firmiv listen for click Depress collar fullv rotate the collar in the direction shown Do this over a soft surface as the microphone SS may pop off suddenly Pull on mic to insure locking ATTACHING THE MICROPHONE 1 10 Insert the UH400A into the XLR connector on the bottom of the selected microphone Listen for the click that indicates the transmitter assembly has locked on to the microphone Gently pull on the mic to insure proper locking has occurred If necessary set the phantom power voltage for the mic If the mic does not reguire phantom voltage set the Phantom Power Voltage Select switch to 5V to reduce the possibility of damage to the mic when the transmitter is powered up Set the MIC LEVEL control to minimum fully counterclockwise N sss D POWER SWITCH C NO GV GE e LeveL PWROFF 18V jl PHANTOM POWER VOLTAGE SELECT O B 8 v Control Panel Turn on the transmitter by setting the Power Switch to PHTM if the mic requires phantom power or to NO PHTM if the mic does not require phantom power Refer to the specifications for the mic you are using to determine if phantom power is required Hold the mic as you will when you will be using it or if the mic will be stationary such as attached to a lectern or mic stand and speak or sing into it at the same voice level that will b
18. h the proper packing materials UPS is usually the best way to ship the units Heavy units should be double boxed for safe transport D We also strongly recommend that you insure the equipment since we cannot be responsible for loss of or damage to 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 4501 PO Box 15900 581 Laser Rd Toll Free 800 821 1121 Rio Rancho NM 87174 Rio Rancho NM 87124 FAX 505 892 6243 USA USA World Wide Web http www lectrosonics com Email sales lectrosonics com 14 LECTROSONICS INC Freguency Agile Plug on UHF Transmitter Rio Rancho NM USA 15 LIMITED ONE YEAR WARRANTY The 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 eguipment which has been abused or damaged by careless handling or shipping This warranty does not apply to used or demonstrator eguipment 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 eguipment it will be replaced at no charge with a similar new item Lectrosonics Inc will pay for the cost of returning your eguipment to you This warran
19. he transmitter to indicate the selected operating mode tion Immediately after all LEDS will blink together red then green followed by the Modulation LEDs 20 and 10 blinking to indicate the operating mode Les N 10 LEDs will blink The 20 and 10 s will blin S e Once for 100 Series mode Two times for 200 Series mode Three times for mode 3 Contact Factory for Details Four times for 400 Series mode D d GEN D LEVEL PWROFF 15V MODULATION LEDs y 410 J Control Panel C 6 6 N N POWER ON OFF LED Top View 8 LECTROSONICS INC Freguency Agile Plug on UHF Transmitter FREOUENCY BLOCKS AND RANGES Each UH400 transmitter is built to cover a pre selected range of freguencies a block The transmitter will tune to any of 256 different freguencies within this factory assigned block See Operating Frequencies MHz The block number is determined by this formula 25 6 x Freq MHz Lowest freq MHz in the block To determine a block number from a frequency Freq MHz divided by 25 6 Block number It is handy to remember these formulas in case you do not have a copy of the table For example suppose you need to know which block covers 685 500 MHz without using the table 685 500 divided by 25 6 26 77734375 The first two digits left of the decimal are the block number In this case 685 500 MHz falls w
20. ile still inside the battery compartment they will be very difficult to remove Stuck lithium batteries can be avoided by removing the label wrapping around the battery before use This will allow the battery to swell but will still leave enough room in the compartment for the battery to fall out normally Rio Rancho NM USA 11 UHaoo TROUBLESHOOTING Before going through the following chart be sure that you have a good battery in the transmitter It is important that you follow these steps in the seguence listed SYMPTOM TRANSMITTER BATTERY LED OFF NO TRANSMITTER MODULATION LEDs RECEIVER RF LAMP OFF NO SOUND OR LOW SOUND LEVEL RECEIVER MOD LEVEL LEDs ARE ON NO SOUND OR LOW SOUND LEVEL RECEIVER MOD LEDs ARE OFF DISTORTED SOUND HISS AND NOISE AUDIBLE DROPOUTS EXCESSIVE FEEDBACK 12 01 P ON oi O N ON ON POSSIBLE CAUSE Battery is inserted backwards Battery is dead Gain control turned all the way down Battery is in backwards Check power LED Mic capsule is damaged or malfunctioning Mic cable damaged or mis wired Phantom power not enabled for mic that reguires it Transmitter not turned on Transmitter battery is dead Receiver antenna missing or improperly positioned Transmitter and receiver not on same frequency Check switches display on transmitter and receiver Operating range is too great Receiver output level set too low
21. ithin block 26 Part of block 23 is not used since it covers a 608 to 614 MHz band that is illegal for use with wireless microphones Operating Frequencies MHz Block 21 537 600 563 100 Block 22 563 200 588 700 Block 23 588 8 00 607 900 614 100 614 300 Block 24 614 400 639 900 Block 25 640 000 665 500 Block 26 665 600 691 100 Block 27 691 200 716 700 Block 28 716 800 742 300 Block 29 742 400 767 900 Block 30 768 000 793 500 export only Use the two Frequency Switches to set the transmitter s carrier frequency to match the associated receiver For example assume that the transmitter and receiver are both assigned Block 25 and the receivers switches are set to 658 400 MHz Subtract the lowest frequency for Block 25 from the as signed frequency to determine the switch settings for the transmitter 658 400 640 000 18 400 Divide the result by 1 6 and round down the nearest two digits to determine the coarse Frequency Switch setting 18 4 1 6 11 5 or 11 B on the switch dial Multiply the coarse Frequency Switch setting by 1 6 and subtract that number from the original result to determine the setting for the fine Frequency Switch 11x1 6 17 6 18 400 17 600 800 or 8 Therefore the Frequency Switch settings for this transmit ter would be B8 Rio Rancho NM USA 9 UHaoo OPERATING INSTRUCTIONS TO ATTACH L Hold the transmitter case and Pr
22. put noise Input level Input impedance Input limiter Gain control range Modulation indicators Low freguency roll off Controls Audio Freguency Response Signal to Noise Ratio dB Total Harmonic Distortion Antenna Battery Type Battery Life Weight Overall Dimensions Emission Designator Freguency Agile Plug on UHF Transmitter SPECIFICATIONS AND FEATURES 537 600 to 607 900 MHz 614 100 to 793 500 MHz 256 freguencies in 100 kHz steps 100 mW nominal 25 to 32 kHz 5 kHz deviation in 400 Series mode 0 002 75 kHz max in 400 Series mode 60 dB below carrier 118 dBV A weighted Nominal 2 mV to 300 mV before limiting Greater than 1 0 V maximum with limiting 1k Ohm Soft limiter gt 30 dB range 43 dB semi log rotary control Dual bicolor LEDs indicate modulation of 20 10 0 10 dB referenced to full modulation 12 dB octave 70 Hz Control panel knob adjusts audio gain Rotary switches on bottom panel adjust transmitter freguency 90 Hz to 20 kHz 1dB Note The audio is deliberately rolled off at 70Hz using a 12 dB octave filter This filter cannot be disabled SmartNR NoLimiting WI Limiting Note The dual envelope soft limiter provides exceptionally good handling of transients using variable attack and release time constants The gradual onset of limiting in the design begins below full modulation which reduces the measured figure
23. ry the various controls and trimmers do not drift with age or vibration and never reguire readjustment There are no adjustments inside that will make a malfunctioning unit start working The LECTROSONICS Service Department is equipped and staffed to quickly repair your equipment In warranty repairs are made at no charge in accordance with the terms of the warranty Out of warranty repairs are charged at a modest flat rate plus parts and shipping Since it takes almost as much time and effort to determine what is wrong as it does to make the repair there is a charge for an exact quotation We will be happy to quote approximate charges by phone for out of warranty repairs RETURNING UNITS FOR REPAIR You 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 to know the nature of the problem the model number and the serial number of the equipment We also need a phone number where you can be reached 8 a m to 4 p m U S Mountain Standard Time B After receiving your request we will issue you a return authorization number R A This number will help speed your repair through our receiving and repair departments The return authorization number must be clearly shown on the outside of the shipping container C Pack the equipment carefully and ship to us shipping costs prepaid If necessary we can provide you wit
24. smitter is factory aligned at the center of its operating range The default position of the Right Switch 100 kHz Left Switch 1 6 MHz Freguency Select Switches Rio Rancho NM USA Freguency Agile Plug on UHF Transmitter freguency select switches is in the center of the transmitter s range INPUT JACK Standard 3 pin Switchcraft XLR type Pin 2 is signal pin 3 is a floating signal ground and pin 1 is case ground see schematic below The UH400A is self locking onto a stan dard microphone To Mic Preamp 5V 18V 42V 1uh 1000 Input Jack Schematic Note If severe noise is experienced when the microphone is moved with respect to the UH400A the cause is an unbalanced condition between pins 2 and 3 of the microphone MODULATION LEDS The Modulation LEDs indicate the proper setting of the MIC LEVEL control There are two bicolor modulation LEDs that can light either red or green depending on the amount of gain applied The transmitter should be set so that both LEDs glow green with the 20 LED occassionally blinking red MODULATION LEDs y Top View Signal Level 20 LED 10 LED Less than 20 dB 20 dB to 10 dB BA 10 dB to 0 dB 0 dB to 10 dB Greater than 10 dB UH400 COMPATIBILITY MODE INDICATORS MIC LEVEL The Modulation LEDS will blink when power is first applied Used to adjust the audio input level for the proper modula to t
25. supply greater than 15 volts See below for a discussion of why 42 and not a true 48 volts For longest battery life use the minimum phantom voltage necessary for the microphone Many stage microphones regulate the 48 volts down to 10 volts internally anyway so you might as well use the 58 volt setting and save some battery power If you are not using a microphone for the input device or are using a microphone that does not reguire phantom power set the Power Switch to the No PHTM position No Phantom Power This is the fully up position of the Power Switch Phantom power should only be used with a fully floating balanced device such as most microphones with a 3 pin XLR connector If you use the phantom power with an unbalanced device or if pins 2 or 3 are DC connected to ground then you will draw maximum current from the power supply The UH400A is fully pro tected against such shorts but the 9 volt battery will be drained at twice its normal rate LECTROSONICS INC The transmitter can supply 4 mA at 42 volts 8 mA at 15 volts and 8 mA at 5 volts The 42 volts setting actually supplies the same voltage to a 48 volt microphone as the DIN standard arrangement due to a dynamic biasing scheme that does not have as much voltage drop as the DIN standard The 48 volt DIN standard arrangement pro tects against shorts and high fault current with high resistance in the power supply feeds to pins 2 and 3 This protects the supply if th
26. ty 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 EOUIPMENT SHALL BE LIABLE FOR ANY INDIRECT SPECIAL PUNITIVE CONSEOUENTIAL OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS EOUIPMENT 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 EOUIPMENT This warranty gives you specific legal rights You may have additional legal rights which vary from state to state LECTROSONICS ING 581 LASER ROAD RIO RANCHO NM 87124 USA www lectrosonics com June 24 2004
27. will run the unit for about 12 hours OBSERVE SWING OPEN POLARITY O 0 O eU OS J O RELEASE DOOR Battery Compartment Action To open the battery compartment press upward on the cover door in the direction of the arrow as shown in the drawing Only slight sliding pressure is needed to open and close the battery door Swing the door open and take note of the location of the positive and negative terminals Insert the new battery correctly and close the cover by reversing the opening procedure Note that the battery door will NOT close if the battery is inserted incorrectly since the termi nals will hit a protective polarity barrier Don t force the battery door closed If it is difficult to close the battery is in backwards The battery life will be affected by the amount of phantom power supplied to any microphones that reguire it A high drain 48 volt microphone can shorten battery life by 40 or more A light drain 18 volt microphone will make little or no difference in battery life The only way to be sure is to test the transmitter and microphone combination with a brand new battery Then will you be sure of the combination s battery life CAUTION Lithium batteries will expand and swell if allowed to go into a deep discharge Be sure to remove lithium batteries as soon as the battery is depleted If lithium batteries are allowed to fully discharge wh
Download Pdf Manuals
Related Search