TOA WD-5800, WM-D5200, WM-D5300 Users Manual
D5000 Series
Digital Wireless Microphone System
COOKBOOK
Index
System Equipment Configuration
How the Digital Wireless System Works
Advantages of the Digital Wireless System
Installation/Setting Procedures – One Room
Installation/Setting Procedures – Multiple Rooms
Installation of the YW-4500 Wireless Antenna
Antenna Distribution
Frequency Table
Procedure for Reusing the Same Frequency
Encryption Function Settings
Interference Countermeasures
Antenna Attenuator
FBS Setting
EQ Setting
Optimizing Sound Volume
...1
...2
...3, 4
...5
...6
...7
...8, 9
...10, 11, 12, 13
...14, 15
...16
...17
...18
...19
...20
...21
System Equipment Configuration
Headset microphone
WH-4000H
WH-4000A
Tie-clip microphone
YP-M5300
YP-M5310
Rechargeable battery
WB-2000-2
Wireless antenna
YW-4500
*
Antenna distributor
WD-5800
Digital wireless transmitter
WM-D5300 (belt-pack type)
Digital wireless receiver
WT-D5800
Battery charger
BC-2000
*
Digital wireless microphone
WM-D5200 (handheld type)
Speaker
Amplifier
*BC-2000 and WB-2000-2 are not designed for the use in the U.S. and Canada, and available in these countries.
- 1 -
How the Digital Wireless System Works
sound reproduction.
Can function correctly
even if more undesired
signals are present as
1
2
2
» How the Digital Wireless System Works
Signal waveforms are used to represent sound, and the state of the sound is expressed according to the
width or height of the waveform. Wireless microphones transduce the waveform of audio entering the
microphone into an electrical signal and transmit that signal to a tuner over radio waves. In this event, it is
an analog wireless system that processes the audio signal as it is in the waveform. On the other hand, it is a
digital wireless system that digitally processes the audio signal.
More specifically, in the digital system, after an analog signal (waveform) is transduced into a digital signal (a
signal simplified by binary numbers 0 and 1) and transmitted by radio, the digital signal is demodulated
into an analog signal and then the audio is output. By digitally processing and simplifying the audio
information to be transmitted, the system can have a variety of advantages, including strong immunity to
noise and maintenance of clear sound.
“Hello”
Audio
(analog)
Digital signal processing
1 2
of analog audio
Digital
modulation
Wireless microphone Wireless receiver Broadcast
Demodulation of digital
to audible analog signal
Digital
demodulation
“Hello”
Audio
(analog)
» Why are digital wireless systems resistant to interference signals?
Let’s have a look at the “D/U ratio” of analog-to-digital wireless systems. The D/U ratio refers to the ratio of the
desired (D) signal to the undesired (U) signal (unit: dB). The desired signal represents the level of that signal,
while the undesired signal represents the level of signal interference, otherwise called noise. The D/U ratio
decreases as the undesired signal increases. The D/U ratio can be considered to be a value necessary to
maintaining clear sound in a wireless system.
If a comparison is made of the necessary D/U
ratio between analog and digital wireless systems,
it is 40dB for analog systems and 20dB for digital
systems. From this, it can be seen that the digital
wireless system has an edge over the analog
wireless system by 20dB in terms of necessary
D/U ratio, indicating that the digital system can
maintain clear sound in circumstances where a lot
of undesired signals are present.
D/U ratio needs
be 40dB or more
Analog System Digital System
for clear sound
reproduction.
Desired
signal
• •
Undesired
signal
• •
D/U ration may be
over 20dB for clear
compared with
analog systems.
Spectrum Spectrum
- 2 -
Advantages of the Digital Wireless System 1/2
Not only can the digital wireless system reduce the influence of noise, it can also maintain clear
sound quality by means of digital processing. In addition to this, there are various advantages
unique to the digital wireless system.
» Use of Multiple Channels in the Same Area
Since the wireless microphone makes itself a source of noise, when using multiple channels in the same
area, channels must be arranged to avoid radio interference due to intermodulation interference. In the case
of the analog wireless system, the most efficient channel arrangement is as shown in the [Analog] figure
below if the intermodulation interference of radio waves is taken into consideration. In this arrangement, the
simultaneous use of 6 channels is all it can handle per 4 MHz band.
Analog
Minimum interval
250 kHz
Occupied bandwidth
110 kHz
809.500
809.750
810.000
(MHz)
806.125
806.250
806.500
806.750
807.000
807.250
807.500
807.750
808.000
808.250
808.500
808.750
809.000
809.250
6 channels/4 MHz (channel arrangement taking intermodulation
interference into consideration)
* This is an example.
In the digital wireless system, however, since one of its features is being immune to the influence of noise,
even when the intermodulation interference occurs, individual channels are less likely to be affected by it. As
a result, equal-interval channel arrangements such as shown in the [Digital] figure below becomes possible,
allowing up to 10 channels to be used simultaneously per 4 MHz band.
Digital
Minimum interval
375 kHz
806.500
806.750
(MHz)
806.125
806.250
[10 channels/4 MHz (equal-interval channel arrangement)]
* This is an example.
807.000
Occupied bandwidth
192 kHz
807.500
807.250
807.750
808.000
808.250
808.500
808.750
809.000
809.250
809.500
809.750
810.000
» Interference Noise Muting
Analog systems are prone to generation of strange noises when exposed to radio interference. Conversely,
radio interference is muted in digital systems, so strange noises are not produced.
- 3 -
Advantages of the Digital Wireless System 2/2
» Reuse of the Same Channel
Another advantage of the digital wireless system is that simultaneous use of multiple microphones on the
same frequency in the same area can be realized more easily because of its immunity to radio interference
and noise.
In the case of analog systems, the distance between microphones should be at least 100 meters when using
the same frequency channel in the same area to ensure 40 dB of D/U ratio. However, in the case of digital
systems, the distance can be reduced to 30 - 40 m*, making it easier to cope with even a building (area) with
multiple rooms that require multiple microphones.
*This can change depending on antenna mounting conditions or room conditions, such as the thickness or material of walls.
Area and Room
Area
Room
Room
» Improved Security
Conventional analog wireless systems transmit their audio signals through FM modulation. With this
method, it is possible that communications could be intercepted by general broadband receivers (FM radio,
etc.), causing much anxiety in terms of security. On the other hand, with digital systems, since the audio is
transmitted through digital modulation, only noise can be heard if received by a broadband receiver. This can
prevent exposure of information, leading to improvements in the security of information communication.
- 4 -
Installation/Setting Procedures - One Room
(1) Determine the operation range.
Use within the signal reception range of
the supplied antenna. Use the supplied antenna.
Use within a wider range than that of
the supplied antenna. Use the YW-4500 external antenna.
(Installation of the YW-4500 Wireless antenna, Page 7)
(Horizontal coverage of antennas, Page 7)
(2) Determine the number of transmitters to use.
Use the supplied antenna. To Step (3)
Use the external antenna. Distribute antennas depending on the number of receivers.
(Antenna distribution, Page 8, 9)
(3) Perform frequency channel settings.
1) Select an arbitrary bank from Banks 1 – 4 at the receiver. (Frequency table, Page 10 -13)
If you need more simultaneously usable channels, then use Bank A – F.
In this case, please switch transmitter's Transmission Output to "L (1mW)".
* Banks A – F cannot be used when including existing analog wireless equipment in the system.
2) Check for idle channels using the channel scanning function.
3) Similarly, perform bank settings and idle channel assignments for the remaining receivers.
4) Set the transmitters for the same bank and frequency channels as the receivers.
(4) Need to prevent eavesdropping?
Perform encryption settings if it is necessary to prevent eavesdropping. (Encryption settings, Page 16)
(5) Conduct transmission/reception test.
Check for the presence of radio interference
When interference is detected (Radio interference countermeasures, Page 17)
(6) Optimize sound quality.
Enable automatic suppression of acoustic feedback. (FBS settings, Page 19)
Set an appropriate EQ for the microphone. (EQ Settings, Page 20)
(7) Optimize the sound volume.
Adjust the transmitter sensitivity. (Sensitivity and volume settings, Page 21)
Adjust the receiver output volume.
- 5 -
Installation/Setting Procedures - Multiple Rooms
(1) Determine the operation range.
Use within the signal reception range of
the supplied antenna. Use the supplied antenna.
Use within a wider range than that of
the supplied antenna. Use the YW-4500 external antenna.
(Installation of the YW-4500 Wireless antenna, Page 7)
(Horizontal coverage of antennas, Page 7)
(2) Determine the number of transmitters to use.
Use the supplied antenna. To Step (3)
Use the external antenna. Distribute antennas depending on the number of receivers.
(Antenna distribution, Page 8, 9)
(3) Confirm the number of channels that can be simultaneously
used by the frequency table.
(Frequency table, Page 10 - 13)
(4) Calculate the total number of transmitters to be used simultaneously in all rooms.
The total number of transmitters is within the number of The total number of transmitters exceeds the number of
simultaneously usable channels. simultaneously usable channels.
(5) Set the frequency channel. (Setting method when using the same channel, Page 14,15)
1) Select an arbitrary bank from Banks 1 – 4 at the receiver. (Frequency table, Page 10 - 13)
If you need more simultaneously usable channels, then use Bank A – F.
In this case, please switch transmitter's Transmission Output to "L (1mW)".
* Banks A – F cannot be used when including existing analog wireless equipment in the system.
2) Check for idle channels using the channel scanning function.
3) Similarly, perform bank settings and idle channel assignments for the remaining receivers.
4) Set the transmitters for the same bank and frequency channels as the receivers.
(6) Need to prevent eavesdropping?
Perform encryption settings if it is necessary to prevent eavesdropping. (Encryption settings, Page 16)
(7) Conduct transmission/reception test.
Check for the presence of radio interference
When interference is detected (Radio interference countermeasures, Page 17)
(8) Optimi sound quality.
Enable automatic suppression of acoustic feedback. (FBS settings, Page 19)
Set an appropriate EQ for the microphone. (EQ Settings, Page 20)
(9) Optimize the sound volume.
Adjust the transmitter sensitivity. (Sensitivity and volume settings, Page 21)
Adjust the receiver output volume.
- 6 -
Installation of the YW-4500 Wireless Antenna
Important points for selecting the mounting position of diversity antennas are
as follows:
Point 1
Mount the two antennas within 20 – 30m (outdoor applications: 40 – 50m) visible range from the microphone’s area of
intended use.
Both antennas should be within visible range from any location where the microphones are to be used. This is necessary for
ensuring optimal conditions for one antenna to receive signals when the microphone my experience the other antenna's dead
spot. In other words, the shape of the room does not matter provided that the above conditions are met. On a diagram of the
site, use a compass to draw two circles representing a radius of 20 – 30m with each antenna as the central point. If usage
locations fall within either of the two circles, such locations can be deemed to be okay.
Point 2
As a guideline, the distance between the two antennas should be 3 – 18m. Although the coverage area becomes wider
as the distance between antennas increases, this degrades the diversity effect, and signal interruption will become more
liable to occur.
If possible, locate one antenna in the direction that can be viewed from the position where the microphone is held, and the
other antenna in the opposite direction (behind the microphone holder).
Point 3
In indoor installations, as a general guideline, install antennas at a height of 2 – 4m above the floor, lest the signal be
blocked by people in the room. Keep the antennas about 30cm below the ceiling. Install the antennas so they face in the
specified directions. When making protectors, use resin or timber and do not use metallic materials.
• Avoid positioning antennas close to metallic objects wherever possible.
• Avoid mounting antennas inside a ceiling or wall.
• Select locations where the antenna can be protected from being hit and damaged by objects.
• Protect the antennas against rain water.
Horizontal coverage of antennas under optimal conditions
• YW-4500• WT-D5800 Rod Antenna
30 - 60 m
60 m or more
- 7 -
Loading...