Toa YW-4500 - Manual (Page 4)

4
Step 4. Fix the coaxial cable to the circuit board of
antenna.
1. Remove 3 cable clamp screws.
2. Connect the coaxial cable to the circuit board.
3. Fix the cable with the removed screws.
Step 5. Mount the antenna bottom case on the wall.
Use the supplies wood screws (4 x 25) to fix it to the
wall surface, or supplies machine screws (3.5 x 20) to
fix to the electrical box.
Notes
• When installing the YW-4500, be sure the antenna is
more than 30 cm away from the ceiling. It is
recommended that the unit be installed at the height
of 2.4 m or more from the floor.
• Set the antenna vertical to the ceiling floor. The
receiving sensitivity of the antenna, when installed
horizontally, is about 6 dB lower than that when
installed vertically. The receiving sensitivity greatly
depends on the installation condition.
Step 6. Replace the top case and retighten the 4 top
case screws removed.
In this case, pay attention to the following points.
• The top case should be positioned with its lamp hole
(located on the bottom side) facing downward.
• The knob of attenuator switch on the built-in circuit
board should fit in that of top case.
8. SPECIFICATIONS
Note: The design and specifications are subject to change without notice for improvement.
Power Source 7 to 12 V DC (supplied from tuner)
Current Consumption Under 15 mA
Receiving Frequency 550 to 932 MHz, UHF
Antenna Gain More than 8 dB (0 dB position)
Attenuator 0 / –10 / –20 dB (selectable)
Output Impedance 75 Ω
Recommended Cable Type RG-6/U or RG-11/U
Operating Temperature Range –10 to 50°C
Operating Humidity 30 % to 85 %RH
Weight 270 g
Color Off-white
6. SPECIFICATION OF THE COAXIAL CABLE
7. ATTENUATOR SWITCH SETTING
The attenuator switch is provided to minimize external noises or interference caused when two
or more microphones having the same channel or adjacent channels are used in close proximity
to each other.
The attenuation level can be selected from 0 (factory-preset), –10, and –20 dB positions.
The more the attenuation level increases (antenna sensitivity becomes less), the narrower the
usable area of wireless microphone is.
In the condition that no interference is present, set the attenuator switch of the antenna for 0 dB position.
Cable Type External Diameter Max. Length
RG-6/U 8.4 mm 35 m
RG-11/U 10.3 mm 50 m
dB
–10
0
–20
Cable clamp screws
Coaxial cable
Attenuator switch
• Accessories
Wood screw ................................... 2
Machine screw
(for electrical box) ......................... 2
Rubber bushing ............................. 1
More than 30 cm