VocoPro DA2277 User's Manual
Contents
1. TV Togo I Lao i VCD Player CD LD PLAYER a2 DS Player z fe oo Ch OS OE sees Understanding and Avoiding VHF Interference Recognizing Interference The ways of recognizing the type of interference present are observing the receiver LED indications and carefully listening to the audio A set of headphones can be a useful tool in isolating and analyzing interference problems With headphones it is easier to listen to one wireless channel at a time even when the system is in use Below are some interference descriptions Most likely there is one that matches the symptoms that you are experiencing e If there is interference when the microphones are off and noise distortion is present from the receiver output when the microphones are on try turning off all other wireless microphones If the interference problem is still present there might be a direct radio interference problem Direct interference is a serious problem that must be corrected in order for the wireless system to be fully usable e Interference in the form of low level audio tones whines whining sounds whose pitch changes rapidly or audible voices or music distorted or not is likely to be caused by intermodulation non wireless interfe2. distorted audio and interference Microphone Position The DA 2277 wireless microphones are ideal for close up vocals and can be held in the hand or mounted on a microphone stand The most common applications and placement techniques are listed below Keep in mind that microphone technique is largely a matter of personal taste there is no one correct microphone position Lead amp Backup Vocals Lips should be less than 3 from or even touching the windscreen on an axis to the microphone Doing this creates a robust sound emphasizes bass and provides maximum isolation from other sources Speech When giving a speech or simply speaking place the microphone 4 to 10 away from the mouth just above nose height for a natural sound with reduced bass You can also place the microphone 8 to 16 away from the mouth slightly off to one side for a more distant sound with highly reduced bass and minimal s sounds Proximity Effect When the sound source is less than 1 4 in from the microphone the microphone boosts bass frequencies by 6 to 10 dB at 100 Hz creating a warmer and richer bass sound than when farther away This effect known as proximity effect happens only in unidirectional dynamic microphones like those used with the DA 2277 Microphone Basics Avoiding Feedback Acoustic feedback can be a problem in any sound system Audio systems that include wireless microphones are somewhat more prone to feedback than those using only
3. AIL LIS TAI ULTIMATE CHOICE OF KARAOKE ENTERTAINMENT DA 2277 FEATURES Wireless Receiver Base Charges Wireless Microphones and Also Serves as a Microphone Docking Station 11 Step Digital Key Controller Professional Digital Echo with Repeat and Delay Controls Vocal Cancel and Vocal Partner Features to Remove Guide Vocals from Multiplex Karaoke Media Two Additional Mic Inputs for a Total of Four Microphone Channels w Individual Volume Controls Digital Echo On Off Switch on 3 Mic Channels Music Bass Treble and Volume Controls Microphone Master Bass and Treble Controls Four A V Inputs and Two A V Outputs for Maximum System Integration Professional Dynamic Microphone Capsules for Professional Sounding Vocals 110V 220V Switchable Digital Key Control Mixer with Dual Rechargeable Wireless Mic System usic o DIGITAL KEY CONTROLLER DA 22 77 Digital Key Control Mixer with Dual Rechargeable Wireless Microphone System v 1 DA 2277 Digital Key Control Mixer with Dual Rechargeable Wireless Microphone System Contents Cautions and WarningS 20 00 c cece eee Welcome iss ctdess cechse se oeset dere deeeeeeeronn Gestceeeeeeseeeees Listening for a LCtiMG ss0ccsae eect cd cd ediewde es Pa cdecesctieeees end Features and Specifications 0 ccc eee Before Getting Started 12 ces cece le ete wds deen ex be len Se ese see Microphone Basics lt lt gen ciecedeeeeewtesee
4. ae to read the Troubleshooting section on common operating errors before concluding that your unit is faulty This unit consumes a fair amount of power even when the power switch is turned off We recommend that you unplug the power cord from the wall outlet if the unit is not going to be used for a long time This will save electricity and help prevent fire hazards To disconnect the cord pull it out by grasping the plug Never pull the cord itself To prevent lightning damage pull out the power cord and remove the antenna cable during an electrical storm The general digital signals may interfere with other equipment such as tuners or receivers Move the system farther away from such equipment if interference is observed When positioning your equipment especially regarding speakers or other accessories avoid positioning them over areas where they can fall and cause Injury to yourself and others NAILL S ha ULTIMATE CHOICE OF KARAOKE ENTERTAINMENT Welcome Thank you for purchasing the DA 2277 from VocoPro your ultimate choice in Karaoke entertainment With years of experience in the music entertainment business VocoPro is a leading manufacturer of Karaoke equipment and has been providing patrons of bars churches schools clubs and individual consumers the opportunity to sound like a star with full scale club models in home systems and mobile units All our products offer solid performance and sound reliab
5. excess of high frequency energy The sound becomes hard and edgy Hard clipping is the most frequent cause of burned out tweeters Even a low powered amplifier or receiver driven into clipping can damage tweeters which would otherwise last virtually forever Recommended VocoPro Gear CDG 4000 PRO proression t C CP GRAPHIC PLAYER D BH ze HBB EE e S C m INS oE Professional CD CD Graphic Player e Pro CD Player W CD Graphics Decoder e Pitch Control To 12 Or e Scramble protection during pitch changes e Single Track Mode e Frame Search W Jog Dial e 4 Speed Fast Forward Rewind Shuttle e Pitch Slider Pitch Bend and Jog Dial e BPM Beat Per Minute Synchronization e Cue Detect Function e Professional 19 Rack Mount Chassis e Switchable 110 240V e NTSC PAL e Dimensions 19 W X 3 1 2 H X 10 D e Shipping Weight 9 35 Lbs 22 23 Recommended VocoPro Gear VP 600X O OREX oo 1 POWER AMP O O AL LIS IEI 2 Space 600W Professional Power Amplifier e 300W 300W RMS e 600W 600W Max e THD 0 05 e Frequency Response 20HZ 20KHZ Signal to Noise e 1 4 or XLR Inputs e Input Ratio Less than 100DB e Input Sensitivity 1 23V e Dimension W x D x H 19 x 13 x 1 5 e Shipping Weight 47 Lbs Recommended VocoPro Gear Professional 8 3 Way Vocal Speakers e 3 Way 8 Karaoke Vocal Speakers Sold in Pair
6. the operating instructions All other servicing should be referred to qualified service personnel CAUTION Read this before operating your unit 10 11 12 CAUTION The apparatus is not disconnected from the AC power source so long as it is connected to the wall outlet even if the apparatus itself is turned off To fully insure that the apparatus is indeed fully void if residual power leave unit disconnected from the AC outlet for at least fifteen seconds To ensure the finest performance please read this manual carefully Keep it in a safe place for future reference Install your unit in a cool dry clean place away from windows heat sources and too much vibration dust moisture or cold Avoid sources of hum transformers motors To prevent fire or electrical shock do not expose to rain and water Do not operate the unit upside down Never open the cabinet If a foreign object drops into the set contact your dealer Place the unit in a location with adequate air circulation Do not interfere with its proper ventilation this will cause the internal temperature to rise and may result in a failure Do not use force on switches knobs or cords When moving the unit first turn the unit off Then gently disconnect the power plug and the cords connecting to other equipment Never pull the cord itself ap nni aueinpt to clean the unit with chemical solvents this might damage the finish Use a clean ry cloth oe
7. wired microphones simply because the freedom of movement with wireless makes it more likely that the user will walk in front of the speakers Take steps to make it less likely that the wireless user will walk in front of the speakers These steps can include more rehearsal time markings on the floor relocation of the speakers and several other options More Tips to Avoid Interference e Lower the sound level of the speakers nearest the wireless user and increase the level of other speakers to compensate If possible rotate the nearest speakers to point them slightly away from the wireless user e Make certain that the transmitter gain is set appropriately for your application If the transmitter gain is set too high it may cause overloading of the wireless circuits and increase the chances of feedback e Most standard techniques for reducing feedback will also work with wireless microphones Because of the increased chance of feedback with wireless understanding and being able to apply these techniques will be helpful e Request that the talker speak louder into the microphone so microphone levels can be reduced e Reduce the distance from the talker to the microphone e Reduce the number of open microphones Each time this number is halved the sound system output can be increased by 3aB e Move the loudspeaker farther away from the microphone e Move the loudspeaker closer to the listener e Use an equalizer feedback reducer to cut t
8. 13 Replacing Recharging the Microphone Batteries Replacing Microphone Batteries e Unscrew the BATTERY COMPARTMENT cap by twisting it counter clockwise BATTERY COMPARTMENT a aid BATTERY LID Insert 2 new RECHARGEABLE AA batteries into the BATTERY COMPARTMENT with the polarities matched as shown in the diagram located in the compartment e Replace and retighten the BATTERY COMPARTMENT cap by twisting it clockwise BATTERY COMPARTMENT CLOSED 7 NOTE The microphones will operate on regular non rechargeable batteries however when using regular batteries DO NOT PLACE THE MICROPHONE IN THE RECHARGING TERMINAL as that could cause the batteries to explode lt Recharging Your Microphones Turn the MICROPHONE to the OFF position Insert the MICROPHONE into the RECHARGING TERMINAL and carefully turn it till you hear it lock in place At that time make sure the CHARGING LED indicator is illuminated When the microphone is fully recharged the CHARGING LED indicator will no longer be illuminated In case you need to end the recharging of a microphone manually carefully turn the microphone till the CHARGING LED indicator is no longer illuminated NOTE To maintain long life use from a rechargeable battery do not recharge for more than 8 hours or allow to recharge after the CHARGING LED indicator is no longer illuminated Getting Co
9. A Jack Outputs AUDIO OUT 1 0 75V 600 ohms RCA Jack Unbalanced AUDIO OUT 2 0 75V 600 ohms RCA Jack Unbalanced AUDIO OUT 3 0 75V 600 ohms XLR Jack Balanced MIC OUTPUT 56mV 1 4 Unbalanced MAXIMUM OUTPUT 20dBV 8 5Vrms OdBV 1V Tone Controls TREBLE 10KHz 15dB STEREO 2dB BASS 100Hz 15dB STEREO 2dB Signal to Noise Ratio MIC gt 91dB Below Max STEREO gt 97dB Below Max Total Harmonic Distortion 0 07 STEREO 0 1 MIC Frequency Response OHz 20KHz 3dB Echo up to 300mS Key 9 steps up amp down 1 octave Dimensions 19 W x 9 5 D x 3 5 H Net Weight 10 6 Lbs Power Consumption 10W RECHARGEABLE VHF WIRELESS MICROPHONE Frequency Range 0 VHF frequency 180 to 250MHz Frequency Precision 0 005 M controlled by quartz Modulation sccecessssenessssssseesessssseeeeesessesneesesenenaes FM type Maximum Deviation 0 00 00 eee eeeeeeeeeees 15KHz Frequency Response 100Hz to 18KHz Signal Noise Ratio cesseesssesssseesesseeneneeeeees over 80dB Operation Scope ssse Radius 166 in free space Muting Type TONE Squelch coding lock still sound design Receiving Sensitivity 0 0 00 eee 10dB uV De emphasis s i iscdicudiscdi iii alniciaadicenites 50uS Harmonic Interfering Ratio 0 0000 ee over 80dB Before Getting Started Things to Consider It is very important to read the following instruct
10. Hie eedees deeedeweewese cus Front Panel Descriptions i202csccesced 2eiebesedescaseendyecieadss Front Top Panel Descriptions 0000 cess ee eee eee ees Rear Panel Descriptions 22s ec esccd cs be eawstaceaes sees tv sewetexeniy Microphone Descriptions 2 4 csacic ce cigew dea deed dae eeeaw de eo duws Replacing Recharging the Microphone Batteries 00000eeeeee Getting Connected 24666352056 ewcdsusetecdedes tee sdsusaseedecesieus Understanding and Avoiding VHF Interference 200000eeees Troubleshooting 26 scnec dee de dicseeeres oe tere cGhceesenesee Seve ecies Glossary Of Tens xs cctucde tn dtestwecdesuedase dees base hwsdeee di Recommended VocoPro Gear 0000 eee eee e ee eee eee eee eee NGL LIS ULTIMATE CHOICE OF KARAOKE ENTERTAINMENT Safety Instructions TAN CAUTION RISK OF SHOCK CAUTION To reduce the risk of electric shock do not remove cover or back No user serviceable parts inside Only refer servicing to qualified service personnel Explanation of Graphical Symbols The lightning flash amp arrowhead symbol within an equilateral triangle is intended to alert you to the presence of danger The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and servicing instructions WARNING To reduce the risk of fire or electric shock do not expose this unit to rain or moisture 1 Read Instructi
11. Partner Vocal Partner is a feature that removes vocals from multiplex CD tracks much in the same way as Vocal Cancel but with an added auto pilot function The main difference is that Vocal Partner will only remove vocals as long as there is activity going through the microphone singing When you stop singing the vocals automatically return Vocal Reducer Vocal Reducer is a feature that removes vocals from standard non multiplex CD tracks To do this the unit compares the audio on the left and right channels and cancels out any signals that appear on both Most currently recorded CD s contain the vocal layer on both sides however some may not leading to varying results CD G or CDG A CD G is a specially formatted disc that has an additional line of sub code on the CD that is responsible for the lyrics that play on video screen for Karaoke systems CD G stands for Compact Disc Graphics Sub Code Sub code is specially coded area of data used by CD G manufacturers to produce lyrics for Karaoke video output Multiplex MPX Multiplex is a type of Karaoke software that has specially formatted left and right channels to make multiplex features available To be formatted for multiplex use a disc must have the vocals coded to the right channel and the music to the left channel When you select a multiplex mode the unit will remove the right channel vocals and split the left channel music to both sides Rack Mountable Rack Mou
12. UT jacks RCA These jacks route the VIDEO signals from the DA 2277 to your TV or display devices Connect an RCA patch cable from these jacks to the VIDEO IN jack on your TV or display device Up to 2 display devices can be connected to these jacks ANTENNA 2 jack Connect a RECEIVER ANTENNA to this jack before attempting to use this device Ensure the ANTENNA is fully extended for optimal signal reception VOLTAGE selector Selects between 115V and 230V power supply settings Select 110V for North American based power requirements and 230V for European based power requirements NOTE It is imperative that this setting is set correctly before powering on your DA 2277 Microphone Descriptions and Functions 3 CHARGE LED 1 POWER LED 5 WINDSCREEN CAPSULE KXXXXXXXX XX XXX RRR RRA OX KKMKKKKKMKK XXX XA gt PIISA WII ses SOK RRA AAAAAAAAAAAAAALY NRSO 4 BATTERY COMPARTMENT 2 POWER SWITCH 1 POWER LED indicator This LED lights up when the microphone is turned on and in use This switch turns the microphone ON OFF 2 POWER switch 3 CHARGE LED indicator This LED lights up when the microphone is being charged This is where you insert the microphone batteries 4 BATTERY compartment 5 WINDSCREEN CAPSULE The WINDSCREEN houses and protects the MICROPHONE CAPSULE Remove the windscreen by twisting it counter clockwise 12
13. al signal reception MIC OUT jack 1 4 This jack provides an AUDIO OUT connection of MICROPHONE OUTPUT only for vocal specific applications vocal effects No A V source music will output from this jack Connect a 1 4 audio patch cable from this jack to the AUDIO IN jacks on your external device AUDIO OUT jacks XLR These jacks are for connecting balanced AUDIO OUTPUT from the DA 2277 to external amplifiers mixers or recording devices Connect a pair of XLR cables from these jacks to the AUDIO IN jacks on your external amplifier mixer or recording device AUDIO OUT 1 AND 2 jacks RCA These jacks are for connecting unbalanced AUDIO OUTPUT from the DA 2277 to external amplifiers mixers or recording devices Connect a paired RCA patch cable from these jacks to the AUDIO IN jacks on your external amplifier mixer or recording device Up to 2 devices can be connected to these AUDIO OUT jacks A V AUDIO IN jacks RCA These jacks are for connecting AUDIO from your A V source players Connect a paired RCA patch cable from these jacks to the AUDIO OUT jacks on your A V source player Up to 4 A V source players can be connected VIDEO IN jacks RCA These jacks are for connecting VIDEO from your A V source players Connect an RCA patch cable from these jacks to the VIDEO OUT jacks on your A V source players Ensure that the VIDEO IN jacks correspond with the player connected to the AUDIO IN jacks VIDEO O
14. c Industries Association s Consumer Electronics Group want you to get the most out of your equipment by playing it at a safe level One that lets the sound come through loud and clear without annoying blaring or distortion and most importantly without affecting your sensitive hearing Sound can be deceiving Over time your hearing comfort level adapts to a higher volume of sound So what sounds normal can actually be loud and harmful to your hearing Guard against this by setting your equipment at a safe level BEFORE your hearing adapts To establish a safe level e Start your volume control at a low setting e Slowly increase the sound until you can hear it comfortably and clearly and without distortion Once you have established a comfortable sound level e Set the dial and leave it there e Pay attention to the different levels in various recordings Taking a minute to do this now will help to prevent hearing damage or loss in the future After all we want you listening for a lifetime Used wisely your new sound equipment will provide a lifetime of fun and enjoyment Since hearing damage from loud noise is often undetectable until it is too late this manufacturer and the Electronic Industries Association s Consumer Electronics Group recommend you avoid prolonged exposure to excessive noise This list of sound levels is included for your protection Some common decibel ranges Level Example 30 Quiet library Soft
15. e Design for Karaoke Studio or Singers Monitor e Power Rating 180 Watts Peak 90 Watts RMS e Metal Grill e Impedance 8 OHM e Sensitivity 92 DB e Frequency Response 20HZ 20KHZ e Dimensions H x W x D 19 x 12 x 11 25 each e Shipping Weight 50 Lbs pair e Dimensional Weight 60 Lbs Due to Oversize 24
16. ecting the 1 8 plug found on a key controllable microphone After plugging the in the microphone you can control the DIGITAL KEY CONTROLLER with the key controls located on the microphone MIC 1 2 3 AND 4 LEVEL controls These knobs control the MIC CHANNELS output levels individually This makes it possible to adjust just one Mic channel without affecting the other 3 channels This can be useful when one person or Mic channel might be overpowering others in a duo or trio Turn clockwise to increase output levels and counter clockwise to decrease output levels DIGITAL ECHO ON OFF button Microphone channels 1 3 and 4 have one of these buttons By pressing it you activate the DIGITAL ECHO for that channel By depressing it you remove the DIGITAL ECHO from that channel NOTE Microphone channel 2 does not have an ECHO ON OFF switch as that channel is used as a dry no echo microphone channel MICROPHONE CHARGING terminals These terminals are for charging the microphones when they are not in use Place microphone in the terminal and twist it clockwise till it clicks into position 10 11 Rear Panel Descriptions and Controls Y var ANTENNA 1 jack Connect a RECEIVER ANTENNA to this jack before attempting to use this device Ensure the ANTENNA is fully extended for optim
17. es interference problems have very basic causes To avoid wasting time on an easily correctable problem check the following items before proceeding e Make certain than no radio transmitters are allowed to come closer than approximately 10 to 15 feet of the wireless receiver antennas This can overload the receiver and increase the chances of interference e Make certain not to allow receiver antennas to touch each other when arranging them Be sure that the antennas from one receiver do not touch or come too close to those of another receiver Try to provide at least 10 inches of separation between the antennas of any two receivers e Make sure that all microphones have charged batteries The low output voltage of weak batteries can cause some microphones to generate harmful interference If there is any doubt install fresh batteries in all microphones e Make sure that the wireless frequencies are not on a local TV channel e Check the wireless frequencies in use to make sure that no two systems are on the same frequency e Check to make sure that no two wireless frequencies are too close together In general 1 MHz is the recommended minimum spacing between systems e If a considerable number of systems will be used operating conditions will be difficult or interference is likely if possible avoid these situations e Before using a system in a new location or another city double check for new problems Small changes in conditions can ca
18. es that are used to cancel out the guide vocals from multiplexed karaoke media During playback of a multiplexed track press the VOCAL CANCEL button once to remove the guide vocals Press the VOCAL CANCEL button a second time to have the guide vocals return to playback VOCAL PARTNER also cancels out the guide vocals from multiplexed karaoke media however the guide vocals are only removed as long as you are singing into the microphone When you stop singing into the microphone the guide vocals are reintroduced automatically Press the VOCAL PARTNER once to initialize the feature and press a second time to disable the feature NOTE Attempting to utilize this feature with a non multiplexed track will not work as this feature is designed to work with multiplexed tracks only 4 A V SOURCE button This button toggles input between devices that may be connected to the CDG and DVD A V channels For input from the CDG channel press the A V SOURCE button once For input from the DVD channel press the A V SOURCE button a second time 5 LEVEL meters These LED meters display the overall output level from both the A V SOURCE and MICROPHONE channels When there is red LED activity the output level is in or nearing a distorted level and should be monitored carefully if not reduced 6 MUSIC BASS TREBLE AND MASTER controls These controls adjust the BASS TREBLE and MASTER VOLUME levels for your source music The BASS and TREBLE controls adjust the l
19. he frequency bands in which the feedback occurs DA 2277 amp Stage Monitors P A System e Place the stage monitor directly behind the microphone e Locate the P A loudspeakers so that they point away from the rear of the microphone With the speakers located in these positions the possibility of feedback is greatly reduced e Always check the stage setup before a performance to ensure optimum placement of microphone and monitors IMPORTANT Every wireless microphone installation is a unique situation and can present a variety of problems Never attempt a live performance without first conducting a walk through test of the system in the performing area If major changes additional wireless systems or intercoms relocation of scenery etc have been made since the last walk through test check the wireless system again as close to performance time as possible Front Panel Descriptions and Controls 1 2 3 4 5 6 7 1 POWER button This button turns the DA 2277 s power ON OFF 2 DOWN NORMAL AND UP buttons These buttons adjusts how the DIGITAL KEY CONTROLLER transposes the musical key of your source music The DOWN button lowers the MUSICAL KEY a half step each time it is pressed The NORMAL key resets the MUSICAL KEY back to it s original key and the UP button raises the MUSICAL KEY a half step each time it is pressed 3 VOCAL CANCEL AND VOCAL PARTNER buttons These buttons activate the MULTIPLEX audio playback mod
20. ility and to further strengthen our commitment to customer satisfaction we have customer service and technical support professionals ready to assist you with your needs We have provided some contact information for you below VocoPro 1728 Curtiss Court La Verne CA 91750 Toll Free 800 678 5348 TEL 909 593 8893 FAX 909 593 8890 VocoPro Company Email Directory Customer Service amp General Information info vocopro com Tech Support techsupport vocopro com Remember Our Website Be sure to visit the VocoPro website www vocopro com for the latest information on new products packages and promo s And while you re there don t forget to check out our Club VocoPro for Karaoke news and events chat rooms club directories and even a Service directory We look forward to hearing you sound like a PRO with VocoPro your ultimate choice in Karaoke entertainment FOR YOUR RECORDS Please record the model number and serial number below for easy reference in case of loss or theft These numbers are located on the rear panel of the unit Space is also provided for other relevant information Model Number Serial Number Date of Purchase Place of Purchase Listening For A Lifetime Selecting fine audio equipment such as the unit you ve just purchased is only the start of your musical enjoyment Now it s time to consider how you can maximize the fun and excitement your equipment offers VocoPro and the Electroni
21. ions prior to starting any installation procedures Doing so will ensure a correct installation and may save you some time as well Protect Against Power Surges e Connect all external components before you plug any of their power cords into the wall outlet e Turn off the DA 2277 before you connect or disconnect any cables e Make sure all cables are properly grounded Protect Components from Overheating e Don t block ventilation holes Arrange any components so that air can circulate freely e Don t stack components e If you place the DA 2277 on a stand make sure you allow adequate ventilation Position Cables Properly to Avoid Audio Interference e Insert each cable firmly into the designated jack e If you place components above the DA 2277 route all cables down the side of the back of the DA 2277 instead of straight down the middle of the back of the DA 2277 Important Stand and Base Safety Information Choose the location for your DA 2277 carefully If the DA 2277 is placed on a stand or base ensure that it is of adequate size and strength to prevent it from being accidentally tipped over pushed off or pulled off This could cause personal injury and or damage to the DA 2277 Unpacking the DA 2277 YNY First carefully unpack all of the box contents You should have found the following items with your new DA 2277 1 DA 2277 Receiver 2 Wireless Microphone Transmitters 2 RCA A V Patch Cables uu 2 Mounting Brackets 7 Mo
22. jack on the DA 2277 MIC OUTPUT CONNECTION perrroresecneereers a7 TA Sm nerean XLR CONNECTION nessoassussssusneannaneanosseacsanaerg bree lesa 538 T Fy AM PLIFIER MIXER RECORDING DEVICE 14 15 Getting Connected Connecting Video to Display Devices e For each VIDEO OUT connection connect a single RCA patch cable from the VIDEO IN jack on your display device to the VIDEO OUT 1 or 2 jack on the DA 2277 If the TV does not have a VIDEO INPUT jack you may connect that end of the cable to the VIDEO INPUT of a VCR and connect the RF OUTPUT of the VCR to the TV ANTENNA INPUT jack e If there is no VCR present you will need to use an RF Modulator To obtain an RF Modulator check with your VocoPro dealer An RF Modulator can also be purchased from Radio Shack sch E TV MONITOR VCR CONNECTION l E TO VIDEO IN VCR hee Sinn gt gt gt Ld OOOcco Ld I System Connection Diagram External Effects Unit DVD Player o o Ol a m i n
23. nce 11 Grounding or Polarization Precautions should be taken so that the grounding or polarization means of an appliance is not defeated 12 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point where they exit from the appliance 13 Cleaning Unplug this unit from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning 14 Power lines An outdoor antenna should be located away from power lines 15 Nonuse Periods The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time 16 Object and Liquid Entry Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings 17 Damage Requiring Service The appliance should be serviced by qualified service personnel when The power supply cord or plug has been damaged or Objects have fallen into the appliance or The appliance has been exposed to rain or The appliance does not appear to operate normally or exhibits a marked change in performance or The appliance has been dropped or the enclosure damaged m OOWS 18 Servicing The user should not attempt to service the appliance beyond that described in
24. nnected Connecting A V Source Players to the DA 2277 For each A V source player you will need an A V patch cable red white and yellow plugs e Connect one set of red and white plugs to the AUDIO OUT jacks on your source player and the yellow plug to the VIDEO OUT jack on your source player e Connect the other set of red and white plugs to an AUDIO IN jacks of your choice VCD LD CDG DVD on the DA 2277 and connect the yellow plug to the VIDEO IN jack corresponding to the same channel you connected the audio to SOURCE PLAYER OR oaos o olo a TEF 9 O19 Connecting Audio Output to External Amplifiers Mixers or Recording Devices e For AUDIO OUTPUT connections there are 4 possible connections that can be made simultaneously unbalanced RCA x2 balanced XLR x1 and isolated microphone 1 4 x1 e For each unbalanced RCA AUDIO OUTPUT connection connect a paired RCA patch cable from the AUDIO IN LINE IN or CH A B jacks on your external devices to the AUDIO OUT jacks 1 or 2 on the DA 2277 For a balanced AUDIO OUTPUT connection connect XLR audio cables from the AUDIO IN LINE IN or CH A B jacks on your external device to the AUDIO OUT jacks 3 L 3 R on the DA 2277 e For an isolated MICROPHONE OUTPUT connection connect a 1 4 audio patch cable from the AUDIO IN or LINE IN jacks on your external device to the 4 MIC ONLY 56dBv
25. ntable refers to the ability to place unit into professional or travel rack cases Such cases are great for building complete systems and protect them during transportation The standard rack size for MOST cases is 19 VCD VCD is a disc formatted in MPEG 1 These discs are good candidates for Karaoke use as they have an audio and a video layer to them VCD stands for Video Compact Disc 20 21 Glossary of Terms A V A V is an abbreviation for Audio Visual Y Adapter Any type of connection that splits a signal into two parts An example would be a connector with one male RCA jack on one end and two female RCA jacks on the other end Woofer A speaker driver used for low frequency reproduction Usually larger and heavier than a midrange or tweeter Midrange A speaker driver used to reproduce the middle range of frequencies A midrange is combined with a woofer for low frequencies and a tweeter for high frequencies to form a complete full range system Tweeier A speaker driver used to reproduce the higher range of frequencies To form a full range system a tweeter needs to be combined with a woofer 2 way system or a woofer and midrange 3 way system Pre Amplifier Or Pre amp is a device that takes a source signal such as from a turntable tape deck or CD player and passes this signal on to a power amplifier s The pre amp may have a number of controls such as source selector switches balance volume and
26. ons All the safety and operating instructions should be read before the appliance is operated 2 Retain Instructions The safety and operating instructions should be retained for future reference 3 Heed Warnings All warnings on the appliance and in the operating instructions should be adhered to 4 Follow Instructions All operating and use instructions should be followed 5 Attachments Do not use attachments not recommended by the product manufacturer as they may cause hazards 6 Water and Moisture Do not use this unit near water For example near a bathtub or in a wet basement and the like 7 Carts and Stands The appliance should be used only with a cart or stand that is recommended by the manufacturer 7 A An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause an overturn 8 Ventilation The appliance should be situated so its location does not interfere with its proper ventilation For example the appliance should not be situated on a bed sofa rug or similar surface that may block the ventilation slots 9 Heat The appliance should be situated away from heat sources such as radiators heat registers stoves or other appliances including amplifiers that produce heat 10 Power Sources The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the applia
27. or Sub carrier Sound Sub carrier Number Range MHz Frequency MHz Frequency M Hz Frequency MHz 174 180 175 250 178 8295 179 750 8 180486 181 250 184 8295 185 750 o 186192 187250 190 8295 191750 _ NOTE The low VHF TV channels 2 through 6 are not used for wireless microphones and do not need to be considered 18 19 Troubleshooting PROBLEMS Battery is running low even when just charged No sound output Excessive noise in microphone output No music output No echo is being applied to the vocals CAUSE SOLUTIONS The microphone is not recharging Reinsert the microphone into the because it is not placed in the recharging terminal and gently turn it till recharging terminal correctly the CHARGING LED indicator is illuminated Battery is not fully recharged Replace with new rechargeable batteries after 8 hours of recharging due to it being too old Microphone output is low Turn up the output level for each microphone channel Adjust the output level selector for each microphone to high Master volume is turned to Turn up the master volume minimum External devices not functioning Inspect and replace external devices if they are not functioning correctly Red LED is lit on the microphone Place microphone in a recharging station till recharged Batteries charge are low Replace batteries batteries SS microphone batteries or replace with new batteries Antenna
28. ow and high frequency levels for your source music while the MASTER control adjusts the overall volume level of your source music NOTE Microphone output is not affected by adjustments made to these controls 7 MIC MASTER control The MIC MASTER control adjusts the overall volume of all microphone output NOTE If you need to adjust the volume level of just one MIC channel in particular use that MIC s individual volume level control instead of the MIC MASTER control Front Top Panel Descriptions and Controls TOP VIEW OF DA 2277 10 1 _ 12 13 14 MIC BASS AND TREBLE controls These controls adjust the low and high frequency levels for all microphone output turn clockwise to increase and counter clockwise to decrease DIGITAL ECHO REPEAT AND DELAY controls The DIGITAL ECHO REPEAT and DELAY controls adjust the DA 2277 s processing of DIGITAL ECHO The DIGITAL ECHO DELAY and REPEAT knobs will alter the levels of effects on all 3 Mic channels simultaneously The DIGITAL ECHO knob controls the overall echo applied to the 3 Mic channels the DELAY knob controls the interval time between each echo and the REPEAT knob controls the of times the echo will repeat For all 3 effects knobs turn clockwise to increase and counter clockwise to decrease MIC 3 AND 4 jacks These 1 4 inch input jacks are for connecting microphones or instruments REMOTE KEY CONTROL jack This jack is for conn
29. possibly tone controls Out of Phase When speakers are mounted in reverse polarity i e one speaker is wired and from the amp and the other is wired and Bass response will be very thin due to cancellation Line Level CD players VCRs Laser disc Players etc are connected in a system at line level usually with shielded RCA type interconnects Line level is before power amplification In a system with separate pre amp and power amp the pre amp output is line level Many surround sound decoders and receivers have line level outputs as well Frequency The range of human hearing is commonly given as 20 20 000Hz 20Hz 20kHz One hertz Hz represents one cycle per second 20Hz represents 20 cycles per second and so on Lower numbers are lower frequencies Gain To increase in level The function of a volume control Decibel dB Named after Alexander Graham Bell We perceive differences in volume level in a logarithmic manner Our ears become less sensitive to sound as its intensity increases Decibels are a logarithmic scale of relative loudness A difference of about 1 dB is the minimum perceptible change in volume 3 dB is a moderate change in volume and about 10 dB is an apparent doubling of volume 0 dB is the threshold of hearing and 130 dB is the threshold of pain Clipping Refers to a type of distortion that occurs when an amplifier is driven into an overload condition Usually the clipped waveform contains an
30. rence or direct interference e If there is interference when the receiver is turned on in the form of buzzy or raspy whines with a distinct cadence or rhythm that differs from time to time digital interference might be the problem Common sources include computers digital delays effects processors lighting controllers and other digital equipment using microprocessors and digital signal processors DSPs e If there is no interference when the receiver is turned off and irregular popping cracking or buzzing noises on the audio with the receiver on there may be electrical interference problems This kind of interference is usually caused by electric motors neon lights lighting equipment appliances and other types of electrical equipment Electrical interference will generally affect all wireless systems at a location not just one system e Certain types of buzzing sounds are actually due to interference from TV stations If the buzzing sound changes substantially at more or less random intervals and does not seem to be caused by electrical equipment the problem may be TV interference e Interference that takes the form of bursts of static or short bursts of noise is likely to be caused by lightning intermittent arcing or defective electrical machinery This type of random interference is pretty rare but can be among the most difficult to resolve 16 17 Understanding and Avoiding VHF Interference Avoiding Basic Problems Sometim
31. s are not receiving Extend the antennas to their outer most microphone signals optimally positions The microphones are out of the Move closer to the receiver till you are in DA 2277 s operating range operating range The A V source selector is set to Set the A V source selector to the current the wrong operating channel active A V source The master volume is set toa Turn up the master volume minimum The A V cables are not Reconnect A V cables correctly and firmly connected properly making good contact The echo on off button for the Set the echo on off buttons to ON microphone channels are set to off Glossary of Terms Digital Echo Digital echo is a synthetically processed sound effect that mimics natural echo Echo in general is the bouncing of waves back and forth between 2 surfaces This effect gives a spacious or ambient feeling that works great with vocals Repeat Repeat is facet of the echo process Repeat refers to the frequency of echoes within a period of time Delay Delay is also a facet of the echo process Delay refers to the amount of time that exists between echoes Vocal Cancel Vocal Cancel is a feature that removes vocals from multiplex CD tracks To be multiplexed a disc must have the vocals coded to the right channel and the music coded to the left channel When you select Vocal Cancel the unit will remove the right channel vocals and split the left channel music to both sides Vocal
32. unting Bracket Screws E 0 hr O 1 Four Pack of AA Rechargeable Batteries o0 O ey O O O O o Microphone Basics Wireless Microphones The Basics e Every wireless microphone system must operate on a specific frequency range e The government dictates the frequency ranges available for use with consumer wireless devices e Wireless frequencies are shared with TV stations communications equipment and a large number of wireless microphone systems e Because of frequency sharing there is always at least a small chance that someone else in the area might be using the same frequency as your wireless system e There must be one transmitter and one receiver to make a complete wireless system and they both must be on the same frequency If the frequencies of any two wireless systems are too close together interference is likely and one or both systems will probably be compromised The practical maximum operating range of a wireless system will vary from as little as 100 feet 30 m in heavily crowded indoor situations to 150 feet 40 m In low crowded situation e Wireless receivers must have either one or two external antennas and there should be a clear open air path between these antennas and the transmitter e Weak or worn out transmitter batteries are a common cause of wireless problems including complete failure poor range
33. use interference where none was present before e Turn off unnecessary electronic equipment especially computers and digital devices These are a relatively common cause of wireless interference If use of computers or digital devices is necessary keep them at least 18 inches 45 cm away from the microphones and receiver antennas Understanding and Avoiding VHF Interference Frequency Conflicts There are two primary ways that other wireless systems and TV channels cause interference The first is a direct frequency conflict If two wireless systems are on the same frequency usually neither system will be usable unless the other is turned off This problem is more common than might be expected especially when all the equipment is the same type This is because most systems have only a limited number of standard frequencies It should be remembered that the other systems could be some distance away in another house of worship down the street in another nearby studio or at another club in the vicinity TV transmitters can also be a powerful source of direct interference if the wireless frequency falls within the assigned channel of a local TV station This problem sometimes occurs because wireless frequencies are listed in MHz and it is not always obvious within which TV channel a particular frequency falls For reference below is TV frequency information TV Channel Frequency Data VHF TV Channels Channel Frequency Picture Carrier Col
34. whispers 40 Living room Refrigerator Bedroom away from traffic 50 Light traffic Normal Conversation 60 Air Conditioner at 20 ft Sewing machine 70 Vacuum cleaner Hair dryer Noisy Restaurant 80 Average city traffic Garbage disposals Alarm clock at 2 ft The following noises can be dangerous under constant exposure Level Example 90 Subway Motorcycle Truck traffic Lawn Mower 100 Garbage truck Chainsaw Pneumatics drill 120 Rock band concert in front of speakers 140 Gunshot blast Jet plane 180 Rocket launching pad Information courtesy of the Deafness Research Foundation The DA 2277 Features DA 2277 FEATURES e Wireless Receiver Base Charges Wireless Microphones and Also Serves as a Microphone Docking Station e 11 Step Digital Key Controller e Professional Digital Echo with Repeat and Delay Controls e Vocal Cancel and Vocal Partner Features to Remove Guide Vocals from Multiplex Karaoke Media e Two Additional Mic Inputs for a Total of Four Microphone Channels w Individual Volume Controls e Digital Echo On Off Switch on 3 Mic Channels e Music Bass Treble and Volume Controls e Microphone Master Bass and Treble Controls e Four A V Inputs and Two A V Outputs for Maximum System Integration e Professional Dynamic Microphone Capsules for Professional Sounding Vocals e 110V 220V Switchable Specifications Inputs Sensitivity MICS 3 4 Wired 1 5mV 1K ohms 1 4 Jack Unbalanced STEREO AUDIO INPUT 50mV 10K ohms RC
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