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2. GENERAL DESCRIPTION
The TOA Wireless Antenna Distributor WD-4800 is designed to be used in conjunction with a VHF/UHF band system for
sound reinforcement applications. It comes with two channels, in which two input signals are mixed and distributed to four
outputs. The WD-4800 also has four DC power distribution outputs.
3. HANDLING PRECAUTIONS
• When installing, keep the unit, receiving antennas, and antenna cables as far away as possible from fluorescent lamps,
digital equipment, personal computers, and other equipment which generate high frequency noise.
• Avoid installing the receiving antennas in close proximity to metal objects, such as iron frames and lockers. Keep the
antennas at least 30 cm away from the wall surface.
• Keep two antennas at least 3 m away from each other to obtain the optimum diversity effect, although this distance
differs depending on the construction and size of the room where they are installed.
• When cleaning the case, use a dry cloth. Never use benzine, thinner or other volatile liquids.
4. NOMENCLATURE AND FUNCTIONS
ANTENNA DISTRIBUTOR WD-4800
POWER
ON
OFF
ANTENNA INPUT (75 Ω)
2
43 1
ANTENNA DISTRIBUTOR WD-4800
120V/230V 50/60Hz 25W
VOLTAGE SELECT
120V
13V 250 mA
TUNER POWER SUPPLY ANT INPUT B
(75 Ω)
ANT INPUT A
(75 Ω)
ENGINEERED IN JAPAN
ASSEMBLED IN TAIWAN
ANT OUTPUT B (75 Ω) ANT OUTPUT A (75 Ω)
230V
5
6
7 8
9
10 11
1. Power switch
Press this switch to switch on the power. Press this
switch again to switch off the power.
2. Power lamp
Lights when the power is switched on.
3. Front antenna input A
75 Ω, BNC. Delivers 9 V DC/25 mA for supplying
power to an external antenna.
4. Front antenna input B
75 Ω, BNC. Delivers 9 V DC/25 mA for supplying
power to an external antenna.
5. AC inlet
6. AC voltage selector
Selects the desired voltage.
7. DC power distribution output
Distributes the DC power.
8. Rear antenna input B
75 Ω, BNC. Delivers 9 V DC/25 mA for supplying power
to an external antenna.
9. Antenna distribution output B
75 Ω, BNC.
10. Antenna distribution output A
75 Ω, BNC.
11. Rear antenna input A
75 Ω, BNC. Delivers 9 V DC/25 mA for supplying power
to an external antenna.
[Front]
[Rear]
• Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and/or
property damage. In addition, the object itself may fall off and cause injury and/or damage.
• If dust accumulates on the power supply plug or in the wall AC outlet, a fire may result. Clean it periodically. In addition,
insert the plug in the wall outlet securely.
• Switch off the power, and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving
the unit unused for 10 days or more. A fire or electric shock may result.
CAUTION
Indicates a potentially hazardous situation which, if mishandled, could result
in moderate or minor personal injury, and/or property damage.