Enping Ding Li Acoustics Technological VHF-4808 Wireless Microphone User Manual VHF 4808

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Document ID	1066850
Application ID	kNXH8+6eDrIzh/+aVQbcgA==
Document Description	Users Manual III
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	222.45kB (2780684 bits)
Date Submitted	2009-02-11 00:00:00
Date Available	2009-02-11 00:00:00
Creation Date	2009-02-11 13:21:18
Producing Software	Corel PDF Engine Version 9.397
Document Lastmod	2009-02-11 13:21:29
Document Title	VHF-4808˵Ã÷Êé.cdr
Document Creator	CorelDRAW Version 9.397
Document Author:	΢ÈíÓû§

Microphone Description and Controls
i.GRILL: Protects the microphone cartridge and helps reduce "breathy" and wind noise pick-up.
2.POWER switch (Not Shown): Used to turn the microphone ON/OFF or put it in STANDBY mode.
3.BATTERY COMPARTMENT LID: Removable lid hides and protects the microphone battery
Mounfing
To instali the VHF—4808 to a 19“ rack
case, complete the steps below,
1. Attach mounting brackets to the
VHF-4808 via the supplied mounting
screws,
2. Align theVHF-4808 with desired
space in rack and siide in slowiy,
rear panel first NOTE: Depending on
your rack case design, it may be
necessary to allow for sufficient
space iortheantennas.
3.Whiieaiigned, use rackcase
screws to stabilize the VHF-4808 in
its space (See diagram right),
Getting Connected
System Connection
1. Connect the AC POWER ADAPTER to the VHF-4808 receiver's POWER INPUT connector; then
plug the ADAPTER into a compatible AC electrical outlet.
XLR our la XLR IN on
Mixer for Mixed Slg’lé/ Output
(Headset and Handheid} Ac Outiet
1/4"ourro 114" IN on Mixer
(One Cabie rorMixed Signal
Output/2 Cabtes for Separate
Headset Signal Output
AC Power Adapter to AC Outlet
Mixerwith 3 Mic inpue ii/A'-XLR|
2. Connect the VHF-4808's receiver to a sound system, mixer or amplifiers microphone input(s)
with either one 1/4" output jack for a mixed channel output (3 handheld), or both 1/4" output jacks for
separate outputs (3 handheld/1 headset).
Separated or Mixed Output
Deciding on separate or mm output
Mixed Channel Output Uses only 1 mic input on External mic adjustments cannot
be channel an external Mixer/Ampiifier applied to just one mic
Seperate Channel Output External mic adjustments can be Uses 2 mic inputs on an external
applied on one or both mic channels Mixer/Amplifier
Antenna Connection
it Insert the
ANTENNA‘s BNC Headset Connection
connector into the p 1. Connect the 1/8” mini-
BNC jack and twist ‘ plug from the headset to
counter-clockwise till it
the 1/8” mini-jack on the
locks into place.
headset receiver.
10
Maintenance Procedures
Headset Receiver Battery Installation
1. Remove the BATTERY COMPARTMENT LID on the headset receiver by gently pushing down in an outward
manner.
2. Insert 1 fresh QV alkaline battery.
3. Replace the BATTERY COMPARTMENT LID by pushing gently on the lid till it “clicks" into place.
Handheld Microphone Battery Installation
1. Slide the microphones BATTERY COMPARTMENT LID located at the bottom of the microphone.
2. Insert 2 fresh 1.5 volt alkaline BATTERIES, being sure to observe proper battery polarity (+l—).
3. Close the BATTERY COMPARTMENT LID.
Operations
1A Press the POWER button on the VHF—4808 receiver's front panel. The power LED on the receiver will glow
BLUE.
2. Adjust the receiver's VOLUME controls to approximately 50%.
3. Switch the microphones POWER BUTTONS to the ON positions.
4. Talk or sing into the microphones. During normal operation the RF signal LED’s will light GREEN when a
microphone is being used.
5. Adjust the receiver’s VOLUME controls until the output levels are balanced with eachother and other
possible source output Le. CD+G tracks. In most cases, the VOLUME controls should be set to +/-75%.
6, If noise is present in the microphone output. squelch adjustments should be made at this time. (See below
for more information on squelch circuitry).
Individual Manual Squelch Controls
Squelch circuits analyze RF signal strength. When a wireless system is used in a noisy RF environments,
conventional circuits may “open" unexpectedly, sending loud bursts of noise through the receiver when the
transmitters signal is weak or turned off. The VHF-4808 uses a noise squelch circuit that analyzes signal
quality with the signal strength. When the transmitter signal is strong, the system's noise level is low and the
receiver sends audio through.When the transmitter signal is weak or absent, the system‘s noise level is high
and the squelch Circuit Will mute the receiver. This virtually eliminates the possibility of annoying bursts of
noise coming through your receiver.
©©©©
Receiver Volume Adjustment
The VOLUME controls on the front panel of the VHF-4808 receiver can be adjusted to set the wireless system
output levels as you desire. After making any musical balancmg adjustments, adjust the receiver volume
control until the output reaches the desired level. Rotate the volume control clockwise to increase output.
Rotate it counterclockWise to decrease output.
VDE‘HHD VHF—4505 FRDFESMNAL “CHANNEL winELEss SYSTEM
11

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