Enping Ding Li Acoustics Technological UB3 Wireless Microphone User Manual
Enping Ding Li Acoustics Technological Co., Ltd. Wireless Microphone
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![41. Rackmounting the ReceiverThere are 2 options available for rackmounting the UHF-3 receiver: singly or side-by-side with another UHF-3 Series receiver.a. Single mounting: Remove the receiver SIDE MOUNT CLIP (1) from each side ofthe receiver (as shown) and slide in the optional ERM-3 RACK EARS (2).b. Side-by-side double mounting: After removing the SIDE MOUNT CLIPS (1) fromboth UHF-3 receivers, join the two receivers with the EJC-3 JOINING CLIP(3) and attach the ERM-33 RACK EARS (4) as shown. (Note: Do not mountthe receiver in a rack directly above an amplifier or other source of high heat –this could degrade the performance of the UHF-3. Always ensure adequateairflow and heat dissipation in any rack configuration.)2. Powering the ReceiverPlug the 12V AC/DC ADAPTER (5) provided into the DC INPUT JACK (9) on the backof the receiver. Then plug the power supply into an AC outlet. (Note: Any 12V DCsource with 400mA capability can also be used.) Press the POWER SWITCH (11)once to turn on the receiver. The POWER ON LED (12) will now light and the receiveris operational.3. AntennasThe UHF-3 receiver is supplied with TELESCOPIC ANTENNAS (15). These should beextended fully to obtain maximum range. Optimal antenna position is 45 degreesfrom the receiver (at 90 degrees from each other). For maximum range, it is alwaysbest to maintain a line of sight (no obstructions) between the receiver antennas andthe transmitter at all times whenever possible.4. Mute (Squelch) AdjustmentIn normal operation, the SQUELCH CONTROL (6) should be set fully clockwise to thefactory preset RF level (Max. Sens.). However, in areas of high RF activity, the squelch(or mute, as it is sometimes called) may need to be adjusted to compensate for theadverse conditions in a particular location. If, with the transmitter off, the receiver’s Aand/or B DIVERSITY LED INDICATORS (13) flicker or stay on, the squelch controlshould be turned counterclockwise until the A and/or B LEDs extinguish. When thesquelch is properly adjusted, the A and/or B LEDs will only light when the systemtransmitter is turned on. Turning the squelch control too far counterclockwise willreduce the range, but yield a quieter squelch (mute) function. During operation,especially at ranges greater than 75 feet, one or the other of the A or B LEDs mayextinguish briefly. This is normal–the unit’s DigiTRU Diversity™ reception ensures thatthe received audio will not be interrupted. When both LEDs extinguish, the transmitteris out of range for that given location, and the user should move closer to the receiverto re-establish the radio link.UHF-3 RECEIVER9(Note: Scratchy noises can sometimes occur when some electric guitars with dirty potsor connections are used with any wireless system. There fore, the suppliedINSTRUMENT CORD (34) has a factory installed capacitor inside the 1/4" plug. Thiscapacitor provides first order filtering of the RF signal from the cord into the guitarand eliminates virtually all scratchy noises. Should your equipment still give youscratchy noises, we suggest these steps to eliminate them:1) Make sure all guitar volume and tone pots are clean and all contacts are solid–thisis very important.2) A 47pf capacitor soldered across the hot to ground terminals of the guitar’svolume and tone pots will provide extra filtering.)6. Microphone Use (with either a lavalier or headworn microphone)Secure the connection from the LAVALIER (36) or HEADWORN MIC CORD (35) byturning the slip ring on the plug into the transmitter clockwise to thread it on to thejack. To unplug, reverse the process. To use the lavalier mic, attach it at chest level.Do not place it too close to the mouth–a distance of about six inches usually worksbest. To use the headworn mic, place it on the head and adjust the boom so that themic is about one inch to the side of the front of the mouth. As the microphone cordalso serves as the antenna, be sure to extend it fully. Rolling up or shortening the cordmay reduce the effective operating range–keep it as straight as possible. When readyto speak, slide the audio MUTE SWITCH (27) to the ON position. Adjust the volume ofthe receiver as per the Audio Output Microphone Connection section of the aboveUHF-3 receiver instruction[Note: Observe care in selecting P.A. volume, transmitter location and speakerplacement so that acoustic feedback (howling and screeching) will be avoided. Pleasealso note the pickup pattern characteristics of the microphone selected.Omnidirectional mics pick up sound equally from all directions, and are prone tofeedback if not used carefully. Unidirectional mics are more resistant to feedback, butpick up sound sources best that are directly in front of the mic. Also, mics that arefarther from the sound source, such as lavaliers, require more acoustic gain and thusare also more prone to feedback than close-source mics such as handheld orheadworn models that are used close to the mouth].For optimum performance, an INPUT LEVEL CONTROL (25) is provided. Adjust thegain by turning the control with a small screw driver. For lavalier mic use, it isrecommended that the level be set at about 2/3 maximum. For headworn mic use, itmay be advisable to turn the gain down somewhat, depending on the volume levelsexpected. In either application, experiment and set for maximum possible gainwithout audible distortion on the high level peaks. (Note: Turning down the gain toomuch can compromise the signal-to-noise and is not recommended.)The UHF-3 receiver is equipped with a 5 segment LED AF LEVEL DISPLAY (14).Occasional flickering of the top AF Peak LED indicator on loud inputs to thetransmitter is normal. If this LED lights continuously, but if the LED stays litcontinuously, turn down the INPUT LEVEL CONTROL (25) on the UB-3 transmitter, ornoticeable distortion may result.](https://usermanual.wiki/Enping-Ding-Li-Acoustics-Technological/UB3/User-Guide-461784-Page-4.png)
![7Unscrew the BATTERY COMPARTMENT COVER (16) and remove, exposing theBATTERY HOLDER (17). Insert 2 fresh AA ALKALINE BATTERIES (18), observing thecorrect polarity as marked, and screw the cover back on to the microphone. Makesure the cover is screwed on completely. Fresh alkaline batteries can last up to 10hours in use, but in order to ensure optimum performance, it is recommended thatyou replace the batteries after every 7-8 hours of use.Turn on the UH-3 by sliding the audio MUTE SWITCH (19) to the OFF position first.Then slide the POWER SWITCH (21) to the ON position. The TX LED indicator (22)will stay on. The battery indicator LED (20) will give a single quick flash, indicatingusable battery strength. In the case of a dead or low battery, the LED will either notgo on at all or will stay on continuously, indicating that the batteries should bereplaced with fresh ones. To preserve battery life, turn the transmitter off when not inuse.The microphone is now ready to use. The A and/or B DIVERSITY LED INDICATORS(13) on the UHF-3 receiver should now be lit, indicating a received signal from thetransmitter. When ready to speak, slide the audio MUTE SWITCH (19) to the ONposition. Adjust the volume of the receiver as per the Audio Output MicrophoneConnection section of the above UHF-3 receiver instructions.[Note: Observe care in selecting P.A. volume, transmitter location and speakerplacement so that acoustic feedback (howling or screeching) will be avoided.]UH-3 HANDHELD MICROPHONE TRANSMITTER16171819 20 2221612111513 141510 98 6 572124314](https://usermanual.wiki/Enping-Ding-Li-Acoustics-Technological/UB3/User-Guide-461784-Page-6.png)