Taiden HCS-5300BAT, Инструкция по установке и эксплуатации

Страница: 17 / 117

1.3 System technology
1.3.1 Basic system concept
The system composition of HCS-5300/80 new
generation digital infrared wireless conference system
is shown in figure 1.2. It is composed of:

New Generation Digital infrared wireless
conference units for participators

New Generation Digital infrared wireless
conference main unit for system control

Digital infrared transceiver(s) for connection to main
unit
The digital infrared wireless conference main unit
converts audio and/or control signals into carrier
outputs which are transmitted to the digital infrared
transceiver(s). In the digital infrared transceiver(s) the
carriers are converted into modulated infrared light,
sent to all digital infrared wireless conference units.
The digital infrared transceiver(s) also receive infrared
signals from every digital infrared wireless conference
unit and convert the signals into audio or control
signals which are transmitted to the main unit.
Figure 1.2 The basic system concept
1.3.2 IR radiation
Audio and control signals of HCS-5300/80 are
transmitted as modulated infrared light. Infrared
radiation is part of the electro-magnetic spectrum,
which is composed of visible light, radio waves and
other types of radiation. Its wavelength is longer in
comparison with the wavelength of visible light.
Infrared light cannot pass through opaque walls and
ceilings and guarantees privacy of the meeting by
avoiding of being intercepted or disturbed. In addition,
infrared light has no radio radiation and a license is not
required when operating infrared light systems.
1.3.3 Carriers and channels
TAIDEN HCS-5300/80 new generation digital infrared
wireless conference system adopts 1~8 MHz wave
band (IEC 61603 BAND
Ⅲ
,
Ⅳ
,
Ⅴ
), shown as figure 1.3.
This wave band is suitable for the transmission of wide
band audio and corresponding signals. Please refer to
table 1.1.
Figure 1.3 Standard wave band in HCS-5300/80 system
Route Channel Frequency
From
conference
unit(s) to main
unit via
transceiver
Audio channel 1 4.3 MHz
Audio channel 2 4.8 MHz
Audio channel 3 5.8 MHz
Audio channel 4 6.3 MHz
Control channel 3.8 MHz
From main unit
to conference
unit(s) via
transceiver
Floor audio +
interpretation audio
(0-3) + Control
signal
2.333 MHz
Floor audio +
interpretation audio
(4-7) + Control
signal
1.666 MHz
Table 1.1 Channels and corresponding frequencies in
HCS-5300/80 system
5