VocoPro UHF-8900 Operating instructions
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VocoPro UHF-8900 is a high-quality wireless microphone system that provides reliable audio transmission for vocal performances, presentations, and more. With its UHF frequency range, the system offers clear and stable sound, minimizing interference and dropouts. The UHF-8900 features easy setup and synchronization, allowing you to get started quickly and effortlessly. It includes two handheld microphones, a receiver, and all the necessary accessories for hassle-free operation.
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UHF-8900
UHF PLL WIRELESS MIC SYSTEM WITH FREQUENCY SCAN
o w n e r ' s m a n u a l
Table of Contents
Safety Instructions . . . . . . . . . . . . . . 3
FCC Information . . . . . . . . . . . . . . . . 4
Welcome . . . . . . . . . . . . . . . . . . . . . 5
Listening for a Lifetime . . . . . . . . . . . 6
Features . . . . . . . . . . . . . . . . . . . . . 7
Getting Connected . . . . . . . . . . . . . . 8
Descriptions and Functions . . . . . . . 10
Setting up the Microphones . . . . . . . 13
Re-syncing the Microphones . . . . . . . 16
Using the Wireless Mics . . . . . . . . . 17
Basic Operations . . . . . . . . . . . . . . 18
Advanced Operations . . . . . . . . . . . . 19
Frequency Reference . . . . . . . . . . . . 20
Troubleshooting . . . . . . . . . . . . . . . 23
Safety Instructions
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 symbol, within an equilateral triangle, 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.
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.
heat sources such as radiators, heat registers,
stoves, or other appliances (including amplifiers)
that produce heat.
connected to a power supply only of the type
described in the operating instructions or as marked
on the appliance.
taken so that the grounding or polarization means of
an appliance is not defeated.
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.
before cleaning. Do not use liquid cleaners or
aerosol cleaners. Use a damp cloth for cleaning.
1. Read Instructions - 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.
should be unplugged from the outlet when left unused
for a long period of time.
that objects do not fall and liquids are not spilled into
the enclosure through openings.
A. The power supply cord or plug has been damaged; or
B. Objects have fallen into the appliance; or
C. The appliance has been exposed to rain; or
D. The appliance does not appear to operate normally
or exhibits a marked change in performance; or
E. The appliance has been dropped, or the enclosure
damaged.
the appliance beyond that described in the operating
instructions. All other servicing should be referred to
qualified service personnel.
To CATV system installer's (U.S.A.): This reminder is provided to call the CATV system installer's attention to
Article 820-40 of the NEC that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected as close to the point of cable entry as practical.
3
FCC Information
1. IMPORTANT NOTICE: DO NOT MODIFY THIS
UNIT!: This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by
Vocopro may void your authority, granted by the FCC, to use this product.
2. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable(s) supplied with this product MUST be used. Follow all installation instructions. Failure to follow instructions could void your
FCC authorization to use this product in the U.S.A.
3. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations,
Part 15 for Class "B" digital devices. Compliance with these requirements provides a reasonable level of assurances that your use of this product in a residential environment will not result in harmful interference with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the owner's manual, may cause interference harmful to the operation of other electronic devices. Compliance with
FCC regulations does not guarantee that interference will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit "Off" and "On", please try to eliminate the problem by using one of the following measures:
Relocate either this product or the device that is being affected by the interference.
Use power outlets that are on different branch (circuit breaker or fuse) circuits or install AC line filter(s).
In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300-ohm ribbon lead, change the lead-in to coaxial type cable.
If these corrective measures do not produce satisfactory results, please contact your local retailer authorized to distribute Vocopro products. If you can not locate the appropriate retailer, please contact Vocopro, 1728
Curtiss Court, La Verne, CA 91750.
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 ensure that the apparatus is indeed fully void of residual power, leave unit disconnected from the AC outlet for at least fifteen seconds.
CAUTION:
READ THIS BEFORE OPERATING YOUR UNIT
1. To ensure the finest performance, please read this
manual carefully. Keep it in a safe place for future
reference.
2. 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.
3. Do not operate the unit upside-down.
4. Never open the cabinet. If a foreign object drops into
the set, contact your dealer.
5. 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.
6. 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.
7. Do not attempt to clean the unit with chemical solvents:
this might damage the finish. Use a clean, dry cloth.
8. Be sure to read the "Troubleshooting" section on
common operating errors before concluding that your
unit is faulty.
9. 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.
10. To prevent lightning damage, pull out the power cord
and remove the antenna cable during an electrical
storm.
11. 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.
NOTE:
Please check the copyright laws in your country before recording from records, compact discs, radio, etc. Recording of copyrighted material may infringe copyright laws.
Voltage Selector (General Model Only)
Be sure to position the voltage selector to match the voltage of your local power lines before installing the unit.
110V
4
Welcome
And thank you for purchasing the UHF-8900 from VocoPro, your ultimate choice in vocal entertainment! With years of experience in the music entertainment business,
VocoPro is a leading manufacturer of vocal 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 reliability, and to reinforce 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 & General Information [email protected]
Tech Support [email protected]
Remember Our Website
Be sure to visit the VocoPro website www.vocopro.com for the latest information on new products, packages and promos. 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 KJ Service directory!
We look forward to hearing you sound like a PRO, with VocoPro, the singer’s ultimate choice.
FOR YOUR RECORDS
Model Number
Serial Number
Date of Purchase
Place of Purchase
5
Listening for a Lifetime
Some common decibel ranges:
Level Example
The following noises can be dangerous under constant exposure:
Level Example
-Information courtesy of the Deafness Research Foundation
6
Features
Features
• 8 UHF PLL wireless microphones
• Frequency scan feature finds interference-free channels
• More than 150 wireless frequencies available
• LCD display shows frequency and other info
• 19” rack mountable chassis, uses just 2 rack spaces
• Independent power knob and volume control per channel
• 8 balanced XLR outputs
• (2) ¼” unblanced mixed outputs
• Includes (2) ¼” unbalanced microphone cables and metal carrying case
(2)
7
Getting Connected
Connecting Power
1. Ensure the main power switch on the rear panel is set to OFF.
2. Connect the power adapter to the power input on the rear panel.
3. Plug the power adapter into a power outlet, or a surge protector.
Note: A surge protector is recommended to protect your equipment from power surges.
Connecting Audio
Using the XLR outputs
The XLR outputs allow you to connect each channel to the mixer independently. This gives you more control over the individual microphone channels when connected to a mixer.
You will need:
• UHF-8900
• 8 XLR patch cables (not included)
• An input device, such as a mixer or amplifier (not included)
To Connect the XLR outputs:
1 . Ensure the main power switch on the rear panel is turned off .
2 . Connect one end of an XLR cable to the
CH.1 output of the UHF-8900.
3 . Connect the other end of the XLR cable to the desired input on your mixer.
4 3 2
Note: To avoid confusion, it’s recommended that the XLR jacks are attached correspondingly (e.g. CH.1 to CH. 1,
CH. 2 to CH. 2, etc. The illustrated setup is for clarity only.)
4. Repeat steps 2 and 3 until all the XLR outputs are connected.
1
4 3 2
Mixer
1
UHF-8900 rear panel
Using the ¼” mixed output
The ¼” mixed output is useful if you do not have a mixer or if you have limited inputs available on your mixer. All 4 microphone signals are mixed together in this output .
You will need:
• UHF-8900
• (2) ¼” patch cables (included)
• An input device, such as a mixer or amplifier (not included)
UHF-8900 rear panel
Mixer
To Connect the ¼” output:
1. Ensure the main power switch on the rear panel is turned off .
2. Connect one end of a ¼” cable to one of the ¼” mixed output on the rear panel of the UHF-8900.
3. Connect the other end of the ¼” cable to the desired input on your mixer or amplifier.
4. Repeat steps 2 and 3 for the second ¼” mixed output jack.
8
Getting Connected
Connecting Antennas
The Antennas receive the UHF wireless signals from the microphones.
1. Attach the antennas to the connectors on the front panel by twisting them clockwise until firmly attached.
2. To disconnect the antennas, twist counter-clockwise.
Note: Please be sure to attach the 900MHz antennas to the top 2 antenna posts and attach the 600MHz antennas to the bottom 2 posts.
Attaching the Rack Brackets
The UHF-8900 comes with detachable rack brackets which allows the unit to be installed in a standard 19 inch rack.
1. Use the included screws to fasten the rack brackets to the sides of the UHF-8900 as shown in the illustration below.
Mounting the UHF-8900 in a Rack
The UHF-8900 will fit in a standard 19” rack (not included).
1. Align the UHF-8900 with the desired space in rack and slowly slide in, rear panel first.
Note: Depending on your rack case design, it may be necessary to allow for sufficient space for the antennas.
2. While aligned, use rack case screws (not included) in the order shown below to stabilize the UHF-8900 in its space, using the “X” rotation (numbered below) will ensure even tension and flush alignment.
Note: Do not tighten screws firmly until all screws are in place.
1
2
3
4
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Descriptions and Functions
1
3 4
5
2 8 7 6
Front Panel
1. Antenna Connector - Connect the antennas to these connectors to receive the wireless signals from the microphones.
2. Main Power Switch - This switch turns the power on and off for the whole unit.
3. Power/Volume Knob - Turn clockwise, until it clicks, to toggle OFF/ON.
- Turn clockwise past the click, to turn up the microphone volume for that channel..
4. Module Display Window - This LCD screen displays information about this module. See the Module Display Window descriptions and functions for more details .
5. Up/Set Button - Used to scroll up menu selections. When in IR Mode, it is used to confirm the desired frequency when choosing manually .
6. Menu Button - Used to cycle through menu screens .
Press once (1x) to toggle into the Group (GR) Selection menu.
Press twice (2x) to toggle into the Automatic Scan.
Press three times (3x) to toggle into the Channel (CH) Selection menu.
Press four times (4x) to toggle into IR Mode.
Note: Module menus have a 4 second timeout period. If the menu button wasn’t pressed within that time, the display will revert to the frequency information screen.
7. Down Button - Used to scroll down menu selections.
8. IR Sensor - Used to sync the desired microphone to the desired module .
Note: IR communication range is approximately 7 inches.
10
Descriptions and Functions
1 2 3 4
5
6 7
Module Display Window
1. MUTE Indicator - Displays when corresponding mic is off or disconnected. The Mute Mode is an automatic function.
2. Group and Channel - Displays the group and channel that the module is set to . *See Displaying the Group & Frequency page for details .
3. IR (infrared) Mode Indicator - Indicates when the module is in IR Mode, which is used to assign a microphone to a module.
4. Squelch* - Displays the current Squelch level for this module .
5. SCAN Mode Indicator - Shows when this module is in SCAN mode, which is used to search for an interference free frequency .
6. Lock - Setting alterations are disabled for that module when displayed.
Note: Press Menu+Set buttons simultaneously to toggle the Lock
6. AF/RF Level Bars - The RF bar displays signal strength of the synced microphone . The AF bar displays the strength of the audio signal being received from the microphone .
7. Channel Frequency - Displays what frequency this module is currently set to.
1
Rear Panel 1 2 3
1. Independent XLR Channel Outputs - These 8 balanced jacks output audio from each module independently.
2. Mixed Audio Output - These unbalanced jacks output the audio of all the modules in their respective rows.
3. Power Adapter Plug* - Attach the power adapter here to provide power to the receiver.
* See commonly asked questions for definition
11
Descriptions and Functions
Microphones
1. IR (infrared) Sensor - This sensor receives the infrared signal that is used to set the frequency that the wireless mic will use. This sensor is only used to set the microphone frequency, it does not send or receive audio signal .
2. Power LED - This LED indicator will turn green when the microphone is turned on. It will turn red when the batteries need to be replaced.
3. ON/OFF Switch - This switch turns the microphone on or off.
Installing the Batteries
To install the wireless mic batteries:
1 . Remove the battery cover .
2. Insert two fresh AA batteries. Make sure they are facing the correct direction.
3 . Replace the battery cover .
12
Setting up the Microphones
Overview
The goal is for each of the UHF-8900’s wireless channels to be operating on a frequency free of interference. This can be accomplished two ways 1) automatic frequency selection, and 2) manual frequency selection. We recommend using the automatic method first, as this method will work well for most areas. However, if you live in a metropolitan area where RF activity is dense, manual frequency selection may work better for you. If you choose the manual method, we recommend first obtaining information on your proximity to TV towers.
Frequencies and Groups
The UHF-8900 has a total of 177 available frequencies. These frequencies are broken down into groups. The two channels on the left are assigned GROUPS GR1-1 through GR1-C, while the two channels on the right are assigned GROUPS GR2-1 through GR2-C .
The top Module row - The groups are listed sequentially starting from GR 01 through GR 05.
The bottom Module row (Left 2 Modules) - The Groups are listed as GR 1-1 through G 1-A.
The bottom Module row (Right 2 Modules) - The Groups are listed as GR 2-1 through GR 2-A.
Pressing Buttons: 4 Second Default
When cycling through the selection modes and parameters using the MENU, UP, & DOWN buttons, if a selection is not made within 4 seconds, the system will automatically revert to the Frequency Information Screen. So, let’s say you are trying to change to a channel in a different group. After pressing MENU, you have only 5 seconds to press the UP/DOWN arrows to browse through the available groups. This applies to every step of the frequency setup procedure, so keep this in mind. If this happens, simply wait for it to finish and resume where you left off.
Other Devices
90°
Be sure to power on any other devices that may potentially interfere with the UHF-8900 (other wireless systems) BEFORE you begin the frequency selection process. This way, you will not have any surprises when they are powered on.
Antenna Positioning
For the best reception, position the receiver antennas at 90 degrees from each other. (see illustration).
WARNING: Please be sure to attach the 900MHz antennas to the top 2 antenna posts and attach the 600MHz antennas to the bottom 2 posts.
13
Setting up the Microphones
Setting the Frequencies Automatically
The microphones will be ready to use right out of the box. The below instructions are intended if interference is experienced at the venue being performed at. The Automatic instructions should be tried first and if problems persist, try the Manual settings .
Note: Please read through the steps before attempting to sync the microphones. The module menus have a 4 second timeout period where if a button is not pressed within that time the module will revert back to the frequency information screen.
AUTOMATIC SETUP
wireless microphone
Setting up the microphones using the frequency scan function.
1. Prepare the System: Ensure the receiver base, the desired module to be paired, and the desired microphone to be paired, are all powered on.
3
2. Identify the IR Sensors: Locate the IR Sensor on both microphone and module .
A.) Microphone - The IR Sensor is located just above the
ON/OFF switch.
B.) Module - The IR Sensor is located directly below the module volume knob.
VOL
SCAN
UP
DOWN
SET
MENU
3. Align the IR Sensors: Position the microphone so that the 2
IR sensors are level and within 3-5 inches of one another.
4. Select Scan: Press the MENU button on the desired module twice (2x). This will display the symbol “Scan” on the LCD. The
Scan Mode will last approximately 4 seconds.
5. Sync the Mic: The “Scan” symbol will be replaced with the “IR” symbol. With the IR symbol displayed, press the SET button to communicate the desired frequency to the microphone . This will display waves emanating from the “IR” symbol, when the waves disappear the screen will display the chosen frequency, as well as the AF and RF reception bars for that channel.
IR
SCAN
UHF-8900
VOL
IR PROGRAM MODE
IR
UHF-8900
5
SET
MENU
UHF PLL WIRELESS SYSTEM
WITH FREQUENCY SCAN
6. Test the Mic: Speak into the microphone to ensure sound in being produced and transmitted . The AF bars on the LCD should register as the microphone is spoken into.
VOL
SET
MENU Note: Once the microphone and module are synced, there will be a 5 second delay in audio each time the microphone is powered on. This is normal.
6
IR 7. Repeat the Process: Repeat steps 3-6 for each of the remaining microphones and modules .
UHF-8900 UHF PLL WIRELESS SYSTEM
WITH FREQUENCY SCAN
4
14
Setting up the Microphones
Setting the Frequencies Manually
If the UHF-8900 is used in an area with heavy RF interference, it may be beneficial to set the frequencies manually.
Please refer to the Advance Operation page to determine which frequencies to use for that area.
Note: Please read through the steps before attempting to sync the microphones. The module menus have a 4 second timeout period where if a button is not pressed within that time the module will revert back to the frequency information page.
MANUAL SETUP
wireless microphone
Setting up the frequencies manually
1 . Prepare the System: Ensure the receiver base, the desired module to be paired, and the desired microphone to be paired, are all powered on.
2 . Identify the IR Sensors: Locate the IR sensor on both the microphone and module .
A.) Microphone - The IR sensor is located just above the
ON/OFF switch.
B.) Module - The IR sensor is located directly below the module volume knob.
3 . Align the IR Sensors: Position the microphone so that the 2 IR sensors are level and within 3-5 inches of one another.
4 . Select a Group (GR): Press the Menu button on the desired module once (1x). This will display the symbol “GR” on the
LCD. With the “GR” symbol displayed, use the UP/DOWN buttons to select the desired group .
5 . Select a Channel (CH): Press the MENU button on the desired module twice (2x). This will cycle the menu past the “SCAN” screen and enter the Channel (CH) selection screen; this will display the symbol “CH” on the LCD. With the CH symbol displayed, use the UP/DOWN buttons to select the desired channel .
IR
IR
3
UHF-8900
VOL
CHANNEL SYMBOL
UHF-8900
UP
DOWN
UHF PLL WIRELESS SYSTEM
WITH FREQUENCY SCAN
UP
DOWN
SET
MENU
SET
MENU
6 . Sync Microphone: Press the MENU button once (1x) to enter
IR mode; this will display the symbol “IR” on the LCD. With the
IR symbol displayed, press the SET button to communicate the desired frequency to the microphone. This will display waves emanating from the “IR” symbol, when the waves disappear the screen will display the chosen frequency, as well as the AF and RF reception bars for that channel .
VOL
IR PROGRAM MODE
IR
SET
UHF-8900 UHF PLL WIRELESS SYSTEM
WITH FREQUENCY SCAN 7 . Test the Mic: Speak into the microphone to ensure sound is being produced and transmitted . The AF bars on the LCD should register as the microphone is spoken into.
SET
MENU
VOL
Note: Once the microphone and module are synced, there will be a
5 second delay in audio when the microphone is powered on. This is normal.
8 . Repeat the Process: Repeat steps 3-7 for each of the remaining microphone and modules .
SET
MENU
IR
7
UHF-8900 UHF PLL WIRELESS SYSTEM
WITH FREQUENCY SCAN
6
4
5
15
Re-syncing the Wireless Mics
Occasionally the microphone will need to be re-synced with the respective module. The frequency is the same but the connection between mic and module is lost.
Note: Please read through the steps before attempting to sync the microphones. The module menus have a 4 second timeout period where if a button is not pressed within that time the module will revert back to the frequency information page.
1 . Prepare the system: Ensure the receiver base, the desired module to be paired, and the desired microphone to be paired, are all powered on.
wireless microphone
2 . Identify the IR Sensors: Locate the IR Sensor on both microphone and module .
A.) Microphone - The IR Sensor is located just above the
ON/OFF switch.
B.) Module - The IR Sensor is located directly below the module volume knob.
3
3 . Align the IR Sensors: Position the microphone so that the
2 IR Sensors are level within 3-5 inches of one another.
VOL
UP
SET
MENU
4 . Re-sync Microphone: Press the MENU button on the desired module for time (4x) to cycle the menu to IR mode; this will display the IR symbol. With the IR symbol displayed, press the SET button to communicate the existing frequency to the microphone. This will display waves emanating from the IR symbol, when the waves disappear, the screen will display the existing frequency, as well as the AF and RF reception bars for that channel.
IR
IR MODE
SCAN
UHF-8900
DOWN
VOL
5 . Test the Mic: Speak into the microphone to ensure sound is being produced and transmitted . The AF bars on the
LCD should register as the microphone is spoken into.
SET
MENU
5
Note: Once the microphone and module are synced, there will be a
5 second delay in audio when the microphone is powered on. This is normal.
IR
UHF-8900 UHF PLL WIRELESS SYSTEM
WITH FREQUENCY SCAN
4
16
Using the Wireless Mics
Microphone Position
The UHF-8900 is ideal for close-up vocals and can be held in the hand or mounted on a mic stand. Keep in mind that microphone technique is largely a matter of personal taste, and there is no one “correct” microphone position.
Feedback
Feedback occurs when the amplified sound from any loudspeaker reenters the sound system through any open microphone and is repeatedly amplified.
Most commonly, feedback is caused by the following conditions:
• Placing loudspeakers too close to microphones.
• Having too many open active microphones.
• Boosting tone controls indiscriminately (mainly treble).
• Performing in areas with high ratios of room surfaces that have hard and reflective surfaces such as glass, marble and wood.
What to do if feedback occurs before the sound system is loud enough:
• Request that the talker speak louder into the microphone.
• Reduce the distance from the talker to the microphone. Each time this distance is halved, the sound system output will increase by 6dB.
• Reduce the number of open microphones .
• Move the loudspeaker farther away from the microphone. Each time this distance is doubled, the sound system output can be increased by 6dB .
• Move the loudspeaker closer to the listener.
• Use an equalizer/feedback reducer to cut the frequency bands in which the feedback occurs.
Microphone Placement & Tone Quality
Lead & 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.
Using the Squelch control
The Squelch control is used to mute unwanted noise interference from a microphone channel when the associated transmitter is turned off. Each channel has its own squelch control and should be set independently as necessary. Squelch can be set from 0 to 15, with 10-15 being represented by A-F.
To adjust squelch:
• For each channel, start with the squelch control set at ‘0’. If not at ‘0’, press and hold the DOWN ARROW until the display reads ‘SQ 0’.
• Press and hold the UP ARROW to increase the squelch
• Press and hold the DOWN ARROW to decrease the squelch.
• You may need to turn the mic on/off to test if the squelch is at a sufficient level.
NOTE: The higher the squelch is set for a particular channel, the shorter the range will be for that mic. At the maximum SQ level, the operational range is approximately 40ft.
17
Basic Operations
Setting Up with Stage Monitors/P.A. System
If you will be using the UHF-8900 with stage monitors and/or a P.A. system, try the following:
• Place the stage monitor directly in front of the microphone .
• 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).
• Always check the stage setup before a performance to ensure optimum placement of microphone and monitors .
PA Speakers Facing Away
From Rear of Microphone
Monitor Directly in
Front of Microphone
NOTE: Every wireless microphone installation is a unique situation, and can present a variety of problems. Never attempt a live performance without first conducting a “walkthrough” 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 .
Avoiding Interference
As with all RF devices, interference can be a problem. While some causes of interference are unavoidable, others can be avoided by taking certain precautions. Below are some helpful hints to avoid unwanted interference.
• Make sure that the operating frequencies used with you wireless system do not coincide with local TV station broadcast frequencies .
• If using multiple systems, or within range of other systems, check all wireless frequencies in use to make sure that no two frequencies are being used at the same time.
• For all operating frequencies, make sure there is at least 1 MHz between each frequency.
• Before using a system in a new location or another city, perform a walk-though to check for new problems.
• Check the squelch control setting on the receiver. A higher squelch setting provides better protection against interference. However, since a high setting also can cause a reduction in operating range, set the control to the lowest position that reliably mutes the interference.
• Make certain that all batteries are fresh and new. Weak batteries make a system more susceptible to interference.
• If not in use, power down electronic equipment such as computers, CD players, and other digital devices, as they are a common source of wireless interference; especially if they are in close proximity to the receiver.
• As much as feasible, keep computers and other digital devices at least 3 feet away from the wireless receiver and/ or its antennas .
Improving Range
To get the most usable range out of your wireless microphone system, follow the helpful hints below.
• Always try to keep an unobstructed line of site between the wireless receiver’s antennas and the wireless transmitters. Metal objects between the wireless transmitters and receiver commonly reduce the operating range.
• When mounting the wireless receiver, avoid mounting it behind other electronic equipment, low to the ground, or in remote equipment/sound rooms.
• As far as feasible, minimize the amount of squelch applied to channels; the higher the squelch setting, the lesser the operating range .
• When operating the wireless system, keep all wireless transmitters at least 10 feet away from the receiver and its antennas. Wireless transmitters in close proximity can overload the receiver and reduce its overall sensitivity, as well as possibly cause interference with other channels on the system.
• Use only high-quality alkaline batteries in the wireless transmitters. Other types of batteries might not provide sufficient voltage and capacity for full power transmission.
• Position the receiver antennas so they do not touch each other.
18
Advanced Operation
Testing a Channel for Outside Interference
Once a microphone and module have been successfully paired, turn the microphone OFF (leave the module ON). With the microphone off, if the RF indicator still has bars showing, there exists interference. Note that RF interference can ebb and flow. Sometimes it may appear as 4 steady bars on the RF indicator, other times, it may weakly occupy a single bar or two.
Generally, we recommend looking for another channel if ANY bars register.
Using the Frequency Scan
In some areas the scan feature may not select an interference-free channel . This is not because the system is malfunctioning, but rather there are no interference-free channels available to choose from in that subgroup. If setting up in this kind, and do not want to use manual frequency selection, we recommend you do the following:
1. Start a Scan (see Setting the Frequencies Automatically for instructions) on the left module (1) using the first group. If there is no open channel in that group, repeat the Scan in the next group. Continue this process until an open channel is selected. (see above for how to test a channel for interference)
2. Begin the Scan process on the second module, but this time start with next available subgroup.
3. Repeat this process with the rest of the modules.
Obtaining Local TV Tower Information
The most common source of RF interference to the UHF-8900 is TV broadcast towers. If the UHF-8900 is experiencing dropouts, static, or other strange noises, it is likely RF interference at fault if within the threshold distance of 30 miles.
Follow the instructions below to obtain the information on your proximity to broadcasting TV towers.
(Applicable to the United States only)
1. Visit www.antennaweb.org (see note below)
2. Select “Click Here to Start”
3. Enter the Zip Code in which the UHF-8900 will be used and hit Submit.
4. The search results page that comes up will contain all the TV broadcasting stations within a 50 mile range.
A.) The information provided for each channel is:
I. Station Name
II . RF Channel - This is the information to be interested in
III. Distance and Heading
5. Write down all of the RF Channel numbers for each of the search results.
Note: Only TV stations within 30 miles would cause issues with the microphones.
6. Refer to the TV Channel Frequency List (page 20) to determine which frequencies not to use.
7. Use the UHF-8900 Frequency List to determine which group and channels that are NOT being interfered with.
Please Note: antennaweb.org is a third party website and is not maintained by nor affiliated with Vocopro.
For example, let’s say you did a search in your area (this example shows zip code 05456) and received the following information:
The only relevant channel is 43, therefore you would jot it down to cross-reference with TV frequency list (page 20)
After cross-referencing, you find that channel 43 uses the frequency range of 644 to 650 MHz. You would NOT choose a frequency that falls in that range .
19
Displaying the Group & Frequency
The module LCD displays all the information regarding the microphone Group (GR) and
Channel (CH). It is important to understand what each icon represents.
• Frequency: This is the frequency that the microphone is currently using . It is easier to refer to this as a combination of both Group and Channel numbers .
For example: 655.MHz would be GR 2-1 & CH 01.
• Group: The Group number is the subset of frequencies to choose from in each module .
The UHF-8900 displays the module in a few different ways
The top Module row - The groups are listed sequentially starting from GR 01 through
GR 05 .
The bottom Module row (Left 2 Modules) - The Groups are listed as GR 1-1 through
G 1-A
The bottom Module row (Right 2 Modules) - The Groups are listed as GR 2-1 through
GR 2-A .
• Channel: This is the number of frequencies in each Group. These are listed the same way in all modules, CH 01 and up.
Please refer to pg. for a complete list of Groups and Frequencies to choose from.
UHF-8900 Frequency List
CH 01
CH 02
CH 03
CH 04
CH 05
CH 06
CH 07
CH 08
GR 01
902.60
906.90
908.05
912.80
914.25
915.95
917.25
925.30
Used by the top 4 modules
GR 02
906.00
904.40
914.90
917.50
919.10
921.85
924.80
926.80
GR 03
903.75
907.60
909.40
916.00
919.50
921.10
923.55
925.60
GR 04
902.70
904.60
908.20
911.95
914.90
922.75
925.40
927.55
20
GR 05
905.00
907.75
909.20
911.05
916.15
922.75
923.85
927.70
UHF-8900 Frequency List
CH 01
CH 02
CH 03
CH 04
CH 05
CH 06
CH 07
CH 08
CH 09
CH 10
CH 11
CH 12
CH 13
CH 01
CH 02
CH 03
CH 04
CH 05
CH 06
GR 1-1
614.000
617.100
621.200
622.200
627.100
628.800
632.100
634.400
638.400
642.200
644.200
644.800
651.900
GR 1-7
632.000
632.500
633.200
634.100
635.500
637.300
GR 1-2
615.000
617.700
623.300
627.400
633.900
641.600
648.600
650.300
GR 1-3
616.300
621.000
627.000
633.300
639.000
646.000
652.600
GR 1-4
614.000
614.500
625.200
616.100
617.500
619.300
GR 1-8
638.000
638.500
639.200
640.100
641.500
643.300
GR 1-9
644.000
644.500
645.200
646.100
647.500
649.300
GR 1-A
650.000
650.500
651.200
652.100
653.500
GR 05
620.000
620.500
621.200
622.100
623.500
625.300
GR 1-6
626.000
626.500
627.200
628.100
629.500
631.300
CH 01
CH 02
CH 03
CH 04
CH 05
CH 06
CH 07
CH 08
CH 09
CH 10
CH 11
CH 12
CH 13
CH 01
CH 02
CH 03
CH 04
CH 05
CH 06
GR 2-1
655.000
658.100
659.300
663.000
664.100
669.100
670.400
675.000
676.600
687.100
688.500
692.500
694.000
GR 2-7
674.000
374.500
675.200
676.100
677.500
679.300
GR 2-2
658.700
660.900
662.400
668.900
677.300
679.200
680.800
684.700
688.300
692.800
GR 2-3
657.600
665.600
672.900
675.000
683.900
686.400
692.300
GR 2-4
656.000
656.500
657.200
658.100
659.500
661.300
GR 2-5
662.000
662.500
663.200
664.100
665.500
667.300
GR 2-6
668.000
668.500
669.200
670.100
671.500
673.300
GR 2-8
680.000
680.500
681.200
682.100
683.500
685.300
GR 2-9
686.000
686.500
687.200
688.100
689.500
691.300
GR 2-A
692.000
692.500
694.400
21
TV Channel Frequencies (USA)
38 614-620 MHz
39 620-626 MHz
40 626-632 MHz
41 632-638 MHz
42 638-644 MHz
43 644-650 MHz
44 650-656 MHz
45 656-662 MHz
46 662-668 MHz
47 668-674 MHz
48 674-680 MHz
49 680-686 MHz
50 686-692 MHz
51 692-698 MHz
Troubleshooting
There is no power
• Make sure the power adapter cord is firmly connected to the back of the UHF-8900 and to the power outlet.
• If using a power strip/surge-protector, make sure that it is plugged in and switched on.
• Make sure the rear panel power switch and the front panel module power switches are turned on.
There is no sound
• Make sure everything is connected firmly and properly.
• Make sure there are no defective cables.
• Make sure all of your components are turned on.
• Make sure all of the components (amp, mixer, TV, etc.) are set to the proper inputs.
• Make sure the microphones are set to the correct channels.
• Make sure the module volume is turned up.
The sound cuts out, is unclear, or has static
• Make sure everything is connected firmly and properly.
• Position the antennas 90º from each other.
• Make sure there are no defective cables.
• Make sure the microphone batteries are fresh and fully charged.
• Increase the squelch on the affected channel.
• Make sure each module is set to a different frequency. Do not assign more than one mic to a module.
• Try a different wireless frequency channel.
Burst of static when turning off a microphone
• Increase the squelch on the affected channel.
• Make sure microphones are at least 1ft from each other.
• Make sure the microphones are at least 5ft from the receiver.
Can’t find an interference free frequency
• Refer to obtaining information on your proximity to TV broadcast towers.
The microphone will not set to the desired frequency
• Make sure the microphone has charged batteries.
• Make sure nothing is blocking the the infrared sensors.
• Hold the microphone closer to the module with the IR sensors facing each other.
• Try a different wireless frequency channel.
Audio from one microphone bleeds into another channel
• Make sure the microphone is at least 10 feet from the receiver.
• Make sure that the mic frequency is at least 1MHz away from the frequencies of the other mics.
Module is stuck in scan mode
• Reset the module by turning it off and on.
Buttons are not responsive
• Make sure the buttons are not stuck.
• Reset the module by turning it off and on.
Commonly Asked Questions
What is Squelch (SQ)?
The Squelch is intended for use against minor signal interference. It should be the first step at troubleshooting a frequency problem. See “Setting the Squelch”.
I turned the mic on but get no AF/RF lights, what’s the deal?
The microphone likely needs to be re-synced with its respective module. See “Re-syncing the Microphones” .
Why is there AF/RF bars showing up when the microphones are turned off?
The LCD display should be clear of both AF/RF bars when the microphones are off. If they’re still there when the mics are off then that would be indicative of an unclear frequency channel. See “Setting the Frequencies Automatically”
(page 14) to find a clear channel, or if being used in a RF-heavy area, see “Setting he Frequencies Manually”.
23
UHF-8900 Owner’s Manual
© VocoPro 2014 v1 .0 .0812
www.vocopro.com
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Table of contents
- 3 Safety Instructions
- 4 FCC Information
- 5 Welcome
- 6 Listening for a Lifetime
- 7 Features
- 8 Getting Connected
- 10 Descriptions and Functions
- 13 Setting up the Microphones
- 16 Re-syncing the Microphones
- 17 Using the Wireless Mics
- 18 Basic Operations
- 19 Advanced Operations
- 20 Frequency Reference
- 23 Troubleshooting