VocoPro Microphone UHF 5900 User Manual

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UHF-5900

UHF PLL WIRELESS MIC SYSTEM WITH FREQUENCY SCAN

o w n e r ' s

m a n u a l

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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.

CAUTION

RISK OF SHOCK

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.

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.

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 appliance.

Explanation of Graphical Symbols

The lightning flash & arrowhead

symbol, within an equilateral triangle,

is intended to alert you to the

presence of danger.

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.

The exclamation point within an

equilateral triangle is intended to alert

you to the presence of important

operating and servicing instructions.

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.

WARNING

To reduce the risk of fire or electric shock, do

not expose this unit to rain or moisture.

14. Power lines - An outdoor antenna should be

located away from power lines.

1. Read Instructions - All the safety and operating

instructions should be read before the appliance is

operated.

15. Nonuse Periods - The power cord of the appliance

should be unplugged from the outlet when left unused

for a long period of time.

2. Retain Instructions - The safety and operating

instructions should be retained for future reference.

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.

3. Heed Warnings - All warnings on the appliance and in

the operating instructions should be adhered to.

17. Damage Requiring Service - The appliance should

be serviced by qualified service personnel when:

4. Follow Instructions - All operating and use

instructions should be followed.

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.

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.

18. Servicing - The user should not attempt to service

the appliance beyond that described in the operating

instructions. All other servicing should be referred to

qualified service personnel.

7. Carts and Stands - The appliance should be used

only with a cart or stand that is recommended by the

manufacturer.

Note:

7 A. An appliance and cart combination

should be moved with care. Quick stops,

excessive force, and uneven surfaces may

cause an overturn.

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.

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FCC Information

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��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.

�� 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.

�� 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.

�� Do not operate the unit upside-down.

�� Never open the cabinet. If a foreign object drops into

�� 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

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.

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:

�� 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.

�� Do not attempt to clean the unit with chemical solvents:

this might damage the finish. Use a clean, dry cloth.

�� Be sure to read the "Troubleshooting" section on

common operating errors before concluding that your

unit is faulty.

Relocate either this product or the device that is being

affected by the interference.

�� 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.

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.

�� To prevent lightning damage, pull out the power cord

and remove the antenna cable during an electrical

storm.

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.

�� 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.

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Please�check the copyright laws in your country

before recording from records, compact discs,

radio, etc. Recording of copyrighted material may

infringe copyright laws.

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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.

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Be sure to position the voltage selector to match the

voltage of your local power lines before installing the

unit.

110V

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Welcome

And thank you for purchasing the UHF-5900 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

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

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Listening for a Lifetime

Selecting fine audio equipment such as the unit youʼve just purchased is only the start of your

musical enjoyment. Now itʼs time to consider how you can maximize the fun and excitement your

equipment offers. VocoPro and the Electronic Industries Associationʼs 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:

• Start your volume control at a low setting.

• Slowly increase the sound until you can hear it comfortably and clearly, and without

distortion.

Once you have established a comfortable sound level:

• Set the dial and leave it there.

• 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 Associationʼs 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

Quiet library, Soft whispers

Living room, Refrigerator, Bedroom away from traffic

Light traffic, Normal Conversation

Air Conditioner at 20 ft., Sewing machine

Vacuum cleaner, Hair dryer, Noisy Restaurant

Average city traffic, Garbage disposals, Alarm clock at 2 ft.

The following noises can be dangerous under constant exposure:

Level

Example

100

120

140

180

Subway, Motorcycle, Truck traffic, Lawn Mower

Garbage truck, Chainsaw, Pneumatics drill

Rock band concert in front of speakers

Gunshot blast, Jet plane

Rocket launching pad

-Information courtesy of the Deafness Research Foundation

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Features

• Operates In The FCC Compliant 600MHz Band

• Includes Four UHF Wireless Microphones

• Frequency Scan Feature Finds Frequencies With The Least Interference

• More Than 150 Wireless Frequencies To Choose From

• LCD Display Windows Show Frequency And Other Information

• 19” Rack Mount Compatible, Uses Only 1 Rack Space

• Independent Channel Power Switches And Volume Controls

• Four XLR Independent Channel Audio Outputs

• One 1/4” Mixed Audio Output

• Microphones Use AA Batteries

• Includes Handy Carrying Case

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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 microphone channel separately to a mixer. This gives you more control over the

sound of the individual channels when they are connected to your mixer.

You will need:

• UHF-5900

• 4 XLR patch cables (not included)

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SERIAL NO:

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• An input device, such as a mixer or ampliﬁer

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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

channel 1 output of the UHF-5900.

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3. Connect the other end of the XLR cable to

the desired input on your mixer.

NOTE: To avoid confusion, it’s recommended

that you plug channel 1 to input 1, channel

2 to input 2, and so forth. The illustrated

setup is for visual clarity only.

4. Repeat steps 2 and 3 until all the XLR

outputs are connected.

Using the 1/4” mixed output

The 1/4” mixed output is useful if you do not have a mixer, or if you have limited inputs available on your mixer. All four

microphone signals are mixed together in this output.

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You will need:

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• UHF-5900

SERIAL NO:

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• 1/4” patch cable

• An input device, such as a mixer or ampliﬁer

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To Connect the 1/4” output:

1. Ensure the main power switch on the rear

panel is turned off.

2. Connect one end of an 1/4” cable to the

1/4” mixed output on the rear panel of the

UHF-5900.

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3. Connect the other end of the 1/4” cable to

the desired input on your mixer or ampliﬁer.

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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.

Attaching the Rack Brackets

The UHF-5900 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-5900 as shown in the illustration below.

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Mounting the UHF-5900 in a Rack

The UHF-5900 will ﬁt in a standard 19” rack (not included).

1. Align the UHF-5900 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-5900 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.

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Descriptions and Functions

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Front Panel

1. Antenna Connector - Connect the antennas to these connectors to receive the wireless signals from the microphones.

2. Module Volume/On-Off Knob - This dual purpose knob controls the volume of this module. Turning the knob clockwise

will increase the volume, turning counter-clockwise will decrease it. Turning the knob counter-clockwise until it clicks will

switch the power off on this module. Turn it clockwise to switch the module on.

3. Module Display Window - This LCD screen displays information about this module. See the Module Display Window

descriptions and functions for more details.

4. Up/Set Button - While in menu mode, press this button to change or set the selected menu item. While not in menu

mode, press and hold this button to increase the squelch.

5. Menu Button - Press this button to toggle through the different menu modes.

6. Down Button - While in menu mode, press this button to change the selected menu item. While not in menu mode,

press and hold this button to decrease the squelch.

7. IR (infrared) Transmitter - This transmitter is used to communicate with the microphone while setting the frequency.

While in IR mode, it will transmit an IR (infrared) signal which tells the microphone which frequency to use.

NOTE: The IR transmitter is used only during microphone frequency setup. It does not transmit or receive audio signal.

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Descriptions and Functions

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Module Display Window

1. MUTE Indicator - Shows when this module is in MUTE mode. The module automatically switches to mute mode when its

paired microphone is turned OFF.

2. Group and Channel - Displays the group and channel that this module is currently set to.

3. IR (infrared) Mode Indicator - Shows when this module is in IR (infrared) mode, which is used assign a microphone to

this module’s frequency.

4. Squelch - Displays the current squelch level for this module. See Using the Squelch Control in the operations section.

5. SCAN Mode Indicator - Shows when this module is in SCAN mode, which is used to search for an interference free

frequency.

6. AF and RF Level Bars - The RF bar shows the strength of the wireless signal from the microphone. The AF bars show

when this module is receiving audio signals from the microphone.

7. Channel Frequency - Displays what frequency this module is currently set to.

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SERIAL NO:

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Rear Panel

1. Independent XLR Channel Outputs - These four balanced jacks output audio from each module independently.

2. Mixed Audio Output - This unbalanced jack outputs the audio of all the modules mixed together.

3. Power Adapter Plug - Attach the power adapter here to provide power to the unit.

4. Main Power Switch - This switch turns the power on and off for the whole unit.

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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

nstall 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.

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Setting up the Microphones

Overview

The goal is for each of the UHF-5900’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. (see page 18)

Frequencies and Groups

The UHF-5900 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 (see chart on page19).

Pressing Buttons: 5 Second Default

When cycling through the selection modes and parameters using the MENU, UP, & DOWN buttons, if a selection is not

made within 5 seconds, the system will automatically start the auto-scan sequence. 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

Be sure to power on any other devices that may potentially interfere with the UHF-5900 (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).

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Setting up the Microphones

Setting the Frequencies Automatically

The wireless mics can be set to a frequency automatically using the frequency scan function Automatic setup is easy, and

is recommended for most areas If you live in a metropolitain area, it might be necessary to use the manual setup process.

AUTOMATIC SETUP

Setting up the microphones using the frequency scan function.

1. Prepare the System: Ensure the main power switch on the

rear panel is turned ON. Ensure the module is turned ON.

Ensure the desired microphone is turned ON.

^��GROUP

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Note: The automatic process happens quickly, so it’s a good

idea to have the mic on and in hand during this process.

DOWN

2. Select a Group: Press the MENU button on the module until

“GR” is visible in the display window. Then press the up and

down buttons to select a group.

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After 5 seconds the unit will automatically scan for an available

frequency, and then switch to mic program mode. Have the

mic on and ready for the next step.

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Program the Mic: While the IR icon appears on the screen,

hold the microphone up to the module about 8 inches away so

that the two IR windows are facing each other.

Hold the mic there until the RF bars appear in the display

window

AUTO SCANNING

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Test the Mic: Check the microphone by speaking into it. The

AF bars in the display window should illuminate when you speak.

Note: After turning on a microphone, there is a 5 second delay

before audio transmission.

IR PR_�O_�G_�RAM MODE

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Turn off the microphone (not the module) to test for outside

interference. If the RF indicator still has bars showing,

interference may be occurring. If this happens, perform an

auto-scan on a different group.

After each channel is successfully paired, leave both the

microphone and module on. This will prevent the next module

from thinking that frequency is available. (Be sure to set the

mics behind the main unit so they don’t get re-programmed)

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5. Repeat the process for each remaining mic and module.

Once this process is complete, the microphones and modules

will remain assigned to these frequencies until you change

them.

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Troubleshooting this process:

The module continues to scan a group: That group probably

has too much interference. Switch the module off and on

again and try scanning a different group.

The RF bars didn’t show up and the mic has no audio:

The

mic probably didn’t get programmed. Make sure nothing is

blocking the IR windows, the microphone is switched on, and

repeat the process.

There is still RF intereference after auto scanning several

different groups: If you can’t seem to ﬁnd an interference

free frequency after scanning several groups, you might be

in an area with heavy RF interference. You may need to use

the manual frequency selection process. See page 15 for the

manual process.

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Setting up the Microphones

Setting the Frequencies Manually

If you are using the UHF-5900 in a area with heavy RF interference, you may have to set the frequencies manually. Before

you start selecting frequencies manually, we recommend that you obtain information on your proximity to TV broadcast

towers (see page 18).

MANUAL SETUP

Setting up the frequencies manually

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1. Ensure the main power switch on the rear panel is turned ON.

Ensure the module is turned ON. Ensure the microphone is

turned ON.

2. Press the MENU button on the module until group (GR) is

visible in the display window.

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3. Press the up and down buttons to select a group. ex: GR16 is

GROUP 1-6, GR2A is GROUP 2-A

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NOTE: The two left modules use GROUP 1 and the two right

modules use GROUP 2.

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4. Once a group is selected, press the MENU button until channel

(CH) is visible in the display window.

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5. When “CH” is visible, press the up and down buttons to select

a channel. The number of channels varies from group to group.

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6. Once a frequency channel has been selected, press the MENU

button until “IR” is visible in the display window.

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7. When only “IR” is visible in the display window, hold the

microphone up to the module so there is a clear line of sight

between the infrared (IR) sensors. Press the SET button to

program the microphone. Hold the microphone up to the

module until the RF bars show up in the display window.

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NOTE: If the RF bars do not show up, make sure the

microphone is turned on and that nothing is blocking the IR

sensor, and attempt this step again.

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8. Check the microphone by speaking into it. The AF bars in the

display window should illuminate when you speak.

NOTE: After turning on a microphone, there is a 5 second

delay before audio transmission.

9. Turn off the microphone (not the module) to test for outside

interference. With the microphone off, if the RF indicator still

has bars showing, there may be interference. If this happens,

you need to select another frequency.

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10. Repeat the process for the remaining modules and mics.

Once this process is complete, the microphones and modules will

remain assigned to these frequencies until you change them.

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Using the Wireless Mics

Microphone Position

The UHF-5900 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 until any noise interference has been successfully muted.

• You may need to turn the mic on/off to test if the squelch is at a sufficient level.

NOTE: Typically, as a channel’s squelch setting increases, its operating range decreases. It is therefore recommended to

set the squelch control only as high as necessary to mute any noise interference.

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Basic Operations

Setting Up with Stage Monitors/P.A. System

If you will be using the UHF-5900 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

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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.

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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.

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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 Automatic Frequency Selection

In some areas the auto-scan feature may not select an interference-free channel. This is not because the system is

malfunctioning; it is because there are no interference-free channels available in that subgroup. If you are setting up in this

kind of environment, and do not want to use manual frequency selection, we recommend you do the following:

1. Start an auto-scan on the left module (1) using GR11. If there is no open channel in that group, repeat an auto-scan on

GR12. Continue this process until an open channel is selected. (see above for how to test a channel for interference)

2. Begin the auto-scan process on the 2nd module, but this time start with next available subgroup. For example, if on the

1st module you found an open channel on GR16, you would start scanning on GR17 on the 2nd module.

3. Repeat this process with the 3rd and 4th modules, starting with GR21.

Obtaining Local TV Tower Information

The most common source of RF interference to the UHF-5900 is TV broadcast towers. If you are experiencing dropouts,

static, or other annoying noises, and suspect RF interference, follow the instructions below to obtain information on your

proximity to broadcasting TV towers (United States).

1. Visit http://www.antennaweb.org (see note below)

2. Click ‘Choose an antenna’

3. Enter your zip code and hit ‘Submit’

4. On the next screen, hit the ‘Continue’ button at the bottom of the map screen

5. On the next screen, under the ‘RF Channel’ tab, take note of any channels between 38 – 51.

After obtaining a list of locally active broadcast channels, cross reference it with the TV channel frequency list (Page 20).

These frequency ranges are to be avoided as much as possible when selecting operating frequencies.

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 chart (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.

NOTE: antennaweb.org is a third party website and is not maintained by or afﬁliated with VocoPro.

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UHF-5900 Frequency List

GROUP 1

USED BY THE 2 LEFT MODULES

GR1-1

CH01 614.025

CH02 615.400

CH03 617.150

CH04 622.025

CH05 625.650

CH06 648.150

GR1-2

GR1-3

GR1-4

GR1-5

GR1-6

614.425

616.350

618.025

623.100

628.900

633.675

615.025

616.004

622.650

636.650

615.275

618.525

619.900

623.400

639.400

615.525

617.275

619.275

653.900

615.775

617.775

620.025

626.400

629.025

641.275

GR1-7

CH01 616.025

CH02 618.275

CH03 620.775

CH04 625.275

CH05 637.275

CH06 640.275

GR1-8

GR1-9

GR1-A

GR1-B

GR1-C

616.275

621.525

626.525

643.900

623.900

616.525

624.900

630.900

634.275

637.900

641.150

619.450

620.625

622.725

627.775

633.200

635.750

616.150

617.575

619.425

625.225

628.325

632.600

614.250

619.425

622.175

624.325

636.675

GROUP 2

USED BY THE 2 RIGHT MODULES

GR2-1

CH01 656.675

CH02 660.925

CH03 662.725

CH04 671.425

CH05 673.825

CH06 680.550

CH07 683.125

CH08

GR2-2

GR2-3

GR2-4

GR2-5

GR2-6

657.275

662.925

664.825

669.450

675.825

685.125

691.225

658.675

664.825

670.825

677.825

678.900

680.500

687.175

691.675

657.675

659.725

665.825

671.775

678.825

679.450

681.725

692.800

655.675

659.975

661.925

670.450

672.975

677.675

679.550

690.425

657.675

663.750

666.600

672.425

674.825

681.575

686.075

692.500

GR2-7

CH01 654.100

CH02 659.675

CH03 665.775

CH04 668.175

CH05 669.175

CH06 670.275

CH07 676.075

CH08 686.925

CH09 690.775

CH10 693.500

CH11

GR2-8

GR2-9

GR2-A

GR2-B

GR2-C

654.375

658.200

665.825

667.875

669.475

670.825

674.125

684.450

690.325

693.775

655.550

658.100

666.025

668.425

670.100

671.325

674.450

679.850

683.600

685.425

689.450

656.075

658.250

666.775

668.675

670.375

674.625

677.900

681.600

686.650

689.825

691.400

656.375

658.525

667.175

669.250

672.075

677.225

681.525

683.525

687.050

690.225

691.775

656.800

658.925

662.475

667.625

669.675

670.975

672.475

675.600

681.275

683.475

687.450

690.100

692.525

CH12

CH13

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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

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Troubleshooting

There is no power

• Make sure the power adapter cord is ﬁrmly connected to the back of the UHF-5900 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. (see illustration on page 13)

• Make sure there are no defective cables.

• Make sure the microphone batteries are fresh and fully charged

• Increase the squelch on the affected channel. (see page 16)

• 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. (see page 16)

• 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. (see page 18)

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

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Notes

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Notes

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UHF-5900 Owner’s Manual

v2.0329

www.vocopro.com

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