vissonic VLI Series User manual

VLI Series
Digital Infrared Language Distribution System
User Manual
V3.0
VISSONIC ELECTRONICS LIMITED

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Meanings of Signs
Safety Precautions
There are signs in both the user manual and the equipments to indicate the hidden risk to your and
others’ personal safety and property. These signs are used to help you to operate the equipments
safely and correctly, whose meanings are illustrated as bellow. Please be sure that you understand
all of them before you start to operate the equipments.
This is to remind the user that all the operation should be done
following the instructions mentioned in the manual,or,death and body
injure may happen due to wrong operation.
This is to remind the user that the dangerous internal voltage that has
not been grounded may cause electricity shock.
Warning:in order to avoid electrical shock,please do not open the
chassis,nor put unnecessary parts inside the chassis.Please contact the
qualified personnel for after service.
CE Certification:means this product has already met the designated
standards by the EU,and the user can use it safely.
SGS Certification:this means this products has passed the test of the
general quality test by the biggest surveyor in Swiss.
This product has been certified by ISO9001 International Quality
Organization(German Rhine TUV）
General Information Indication
This is to list some content which may cause unsuccessful operation or
setting and some information that should be noticed.
This is to indicate the page where related theme or material can be
found.

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Important Precautions
Warning
To ensure the proper function of the equipment and the safety of the user, please following the
under mentioned instructions during installation, use and maintenance:
Installation Instructions
⚫Please do not use the equipment in the following environment: shaking, dusty, oily, smoky,
conducting dusty, filled of corrosive gas and flammable gas. Also, please don’t expose the
equipment to high temperature, condensing, wind, rain. Electrical shocking, fire and wrong
operation can also damage the product.
⚫When screwing and cabling, please don’t drop the sweepings and wire leads into the
controller’s vent hole, or, fire, malfunction and wrong operation may be caused.
⚫After the installation, please be sure that the vent hole is not been blocked, or, the heat will not
be yielded properly and fire, malfunction and wrong operation may be caused.
⚫Please don’t wire or plug/unplug the cable while it’s still live, or, electrical shock and circuit
damage may happen.
⚫The installation and wiring should be stable, and the poor contact may cause wrong operation.
⚫In the place where sever interference exists, shielded cable should be used as the I/O cable for
the high frequency signal to improve the transmitting quality.
Wiring Instruction
⚫Before the installation and wiring, please cut all the power supply, or electrical shock or damage
to the equipment can be caused.
⚫This product should be well grounded before using.
⚫After the installation and wiring, all the sundries should be cleaned up, and the covers and
panels should be put back and fixed well in order to avoid electrical shock.
⚫Operation and maintenance instruction
⚫Please don’t touch the connectors when they are electrified, or electrical shock or wrong
operation may happen.
⚫Please cut the power first before cleaning the cleaning and winding up the connectors.
Operation when they are electrified can cause electrical shock.
⚫Please cut the power first before wiring or disconnecting the communication signal cable,
extension modules or control units, or damage can be caused to the equipments.
⚫Please do not dismantle the equipment to avoid damages to the internal components.
⚫Please read this manual carefully, and ensure that all your operations are safe before changing
the program, debugging the program, turning on the system and stopping the operation.
⚫The button cell can only be replaced when the equipment is not electrified. If the replacement
has to be done with the electricity is on, it should be operated by professional person with
insulating gloves on.
Product Disposal instruction
⚫When disposing the product, please take the following instructions:

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Preface
“Digital IR Language Distribution System user manual” mainly introduces the way of operation,
main specifications and the frequently seen malfunction elimination methods for VIS-VLI700A-
4/-8/-16 (Digital IR Transmitter), VIS-VLI701A (Digital Infrared Radiator), and VIS-VLI703A-
4/-8/16/-32 (Digital Infrared receiver).
This manual is provided with the intent to provide operation instructions, not for maintenance.
Changes and updates may be applied to this manual after it was issued, please check with the
manufacturer or your distributor for the latest version.
All rights related to this manual is reserved by VISSONIC Electronics Limited. No organization or
person can use part or all of the content of this manual for business usage without permission from
VISSONIC Electronics Limited.
This manual is protected by the “Copyright Law of the People's Republic of China” and other IPR
protection laws, no disperse or copy is accepted without paper permission from VISSONIC
Electronics Limited.
Version
Version
Update
Date
1.0
2019.4.15
2.0
2019.6.1
3.0
Add DCP2000 and interpreter uni
t language channel and VIS-VLI7
00A IR transmitter operation inter
face
2023.9.27

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Contents
Preface .................................................................................................................................................3
Chapter 1 Overview ............................................................................................................................ 6
1.1. About ....................................................................................................................................6
1.2 Equipments ........................................................................................................................... 6
1.3 System Advantages ............................................................................................................... 6
1.4 Factors that affect the IR radiation ....................................................................................... 7
1.4.1 The directivity of receiving and emitting .................................................................. 7
1.4.2 The relation between the radiator and the seats arrangement ................................... 8
1.4.3 The surface of the walls, ceiling, floor and curtain ................................................... 9
1.4.4 The coverage of the radiating panel ........................................................................ 10
1.4.5 Floor area of overlapping and multi-path effects .................................................... 11
Chapter 2 Digital Infrared Transmitter ............................................................................................. 12
2.1 Overview .............................................................................................................................12
2.2 Features ............................................................................................................................... 12
2.3 Installation ...........................................................................................................................12
2.4 VIS-VLI700A-4, VIS-VLI700A-8 ,VIS-VLI700A-16 Transmitter .................................. 13
2.5 Connection .......................................................................................................................... 14
2.5.1 To CLEACON full digital networked DSP conference system ..............................14
2.5.2 To the interpreter ..................................................................................................... 15
2.5.3 To the external audio source ....................................................................................15
2.5.4 To the emergency signal switch .............................................................................. 15
2.5.5 To another transmitter ..............................................................................................16
2.6 Controls and indicators ....................................................................................................... 17
2.7 Interconnection ................................................................................................................... 17
2.8 Specification ....................................................................................................................... 17
2.9 VIS-VLI700A IR transmitter operation interface .............................................................. 18
Chapter 3 Digital Infrared Radiator ..................................................................................................21
3.1 Overview .............................................................................................................................21
3.2 Features of Radiator ............................................................................................................21
3.3VIS-VLI701A Front Panel .................................................................................................. 22
3.4 How to allocation the system ..............................................................................................22
3.4.1 The installation of the radiator .................................................................................22
3.4.2 Wiring of the radiator .............................................................................................. 24
3.4.3 Rectangle Coverage ................................................................................................. 25
3.5 Installation steps of radiator ................................................................................................25
3.6 Delay switch Settings ..........................................................................................................26
3.6.1 How to calculate the delay .......................................................................................26
3.7 Installation of the radiator ...................................................................................................26
3.8 Connection between the radiator and the transmitter .........................................................27
3.9 Controls and indicators ....................................................................................................... 27
3.10 Interconnection ................................................................................................................. 28
3.11 Specification ..................................................................................................................... 28
Chapter 4 Digital Infrared Receiver ................................................................................................. 29
4.1 Overview .............................................................................................................................29
4.2 VIS-VLI703A-4/8/16/32 Description .................................................................................29
4.3 VIS-VLI703A-4/8/16/32 features .......................................................................................30
4.4 Operations of the receiver ...................................................................................................30
4.5 Controls and Indicators .......................................................................................................31
4.6 Interconnections ..................................................................................................................31
4.7 Specification ....................................................................................................................... 31
Chapter 5 Interpreter Unit .................................................................................................................29
5.1 Features ............................................................................................................................... 32
5.2 Description ..........................................................................................................................32
5.3 Descriptions of panel display ..............................................................................................33

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5.4 Operator .............................................................................................................................. 34
5.5 Specification ....................................................................................................................... 34
5.6 Setting of the language channel ..........................................................................................35
5.6.1 Connect to IR VIS-VLI700A transmitter ................................................................ 35
5.6.2 Connect to DCP 2000 controller ............................................................................. 36
Chapter 6 Accessories .......................................................................................................................38
6.1 VIS-TC50A Charger and Storage Box ...............................................................................38
6.2 VIS-BTPS Battery Pack ................................................................................................... 39
6.3 VIS-HPI Interpreter Headset .............................................................................................. 39
6.4 VIS-HPD Conference Headphone ......................................................................................39
Chapter 7 Frequently seen malfunction and maintenance ................................................................41

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Chapter 1 Overview
1.1. About
VIS-VLI700A-8 8 channel transmitter VISSONIC independently developed this system, which
applies full-digital modulating technology. With this system, the translator simultaneously
interpreting the language according to the speaker’s original voice and the translated languages are
transmitted to the whole meeting hall via modulated IR and can be received by the delegated with
the earphone and the IR receiver with preferred channel on the language they understand.
Digital IR Simultaneous Translation System is a system using IR to transmit voice. Because light
travels in straight lines, there is no signal outside of an enclosed room, thus, it has very good
confidentiality. Within the room, due to the scattering and diffusion of the IR light on the surface
of the wall, floor, ceiling, the IR signal will form a compact light net. As long as it is within the
range where the IR light can cover, the receiver can be allocated randomly.
This system can also be used for other applications, such as music distribution. It has high
precision working frequency, stability, high confidentiality, and is interference and eaves-dropping
proof. This system can be applied in international meetings halls from small to large scale, or in
multi-language education organizations.
1.2 Equipments
VISSONIC language distribution system include：
Digital IR Transmitter
VIS-VLI700A-4 4 channel transmitter
VIS-VLI700A-16 16 channel transmitter
Digital IR radiator
VIS-VLI701A
Digital IR receiver
VIS-VLI703A-4 4 channels receiver VIS-VLI703A-8 8 channels receiver VIS-VLI703A-16 16
channels receiver VIS-VLI703A-32 32 channels receiver
Interpreter Headset
VIS-HPI for interpreter unit
Charger and Storage Box
VIS-TC50A charger and sorage box for Digital infrared receiver
The system can be composed of one or more of the above mentioned equipment.
1.3 System Advantages
Digital IR Language Distribution System includes transmitter, radiator, IR receiver and charging
box. The transmitter encoding the audio signal, compresses, modulate it to many carrying waves
and then transmit it to the radiator. The radiator emits the carrier signal via IR light. The IR
receiver receives, modulates and converts the signal into audio output or other data. They have the
following advantages:

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⚫Apply simultaneous interpretation
It is important to allow every delegates hear clearly in a multi-language conference system, thus, a
simultaneous interpretation system is a necessity. The translators translate the original
language, then the translated language is distributed all over the whole meeting hall and the
receiver select the language they need and can hear it with the earphone.
⚫Using IR to transmit
IR is part of the electromagnetic radiation spectrum, which includes visible light, radio wave and
other radiation wave. The wave length of IR is longer than the visible light, thus, IR cannot
penetrate the walls and ceiling. In this way, the confidentiality of the meeting can be ensured,
tapping and interference can be avoided. VISSONIC’s IR Simultaneous Translation System uses
the IR modulated by DQPSK to transmit the signal. At the same time, this system also needs radio
frequency permission.
⚫Advanced digital technology
Full-digital DQPSK modulation technology has been used to gain high frequency usage and strong
anti-interference ability.The system applies full-digital audio processing technology to ensure the
high audio quality, eliminate overhearing between channels and noise etc.
⚫Free from the interference of fluorescent light
The traditional IR Simultaneous Translation System is easily interfered by the fluorescent light.
VISSONIC has applied unique technology and has solved this problem thoroughly. It works on 2-
6MHZ frequency, and avoided the interference from various kinds of lighting sources.
⚫Flexible channel selection
VISSONIC has left huge flexibility to the users while designing the channels, and has provided 32
general quality audio channels. (31 different translation channel + 1 original voice). The general
quality channels take smaller bandwidth and can be used to transmit audio signals.
⚫Flexible and convenient using methods
Using the IR system gives the delegates the freedom of going around the whole meeting room.,
because the signal transmit in the air, and the system has no physical connection, thus the activities
can only be limited by the walls of the meeting room. The IR receiver is light and delicate, which
can be put in the pocket of the user’s T-Shirt or coat.
⚫Simple Installation and maintenance
The system is easy to install (the time it takes depends on the allocation and correction of the
radiating panels). The only job to be done is connect the equipments together, and maintenance is
just charging.
Once the installation is finished, the system can be expanded any time. If the meeting scale
enlarges, what have to be done is just add more IR receivers in to the system, and the basic
structure doesn’t have to be changed.
1.4 Factors that affect the IR radiation
1.4.1 The directivity of receiving and emitting
VISSONIC digital IR distribution system has wide receiving angle,which can allow the receiver to
get perfect sound quality no matter how they are placed.Please check Fig.1-1.

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IR receiver ‘s best receiving range
Fig1-1radiatorcoordinate illustration
VISSONIC radiating panel’s cover area is a ellipse,which means as the distance gets larger,the
dimension of the radiation area gets larger till a certain limit is reached.Please check the Fig.1-
2“radiating panel coordinate illustration.
1.4.2 The relation between the radiator and the seats arrangement
If the receiver is accurately directed to the radiating panel, the receiver can get the best effect
signal. If the radiating panel or the receiver gets off the light axe, the received energy will descend.
But within, as long as there is no direct screen between the receiver and the radiating panel (for
example screened by the delegate’s body or other objects), the energy can still be sufficient.
To ensure the best signal transmission, the allocation of the radiating panels has to be suited to the
seats’ positions. The ideal way is to have the radiating panel emit directly onto the seats. This is
one way of designing the installation solution.
Obviously, we should prefer the way of installation shown in Fig.1-4. But in actual installation, the
way shown in Fig.1-4 can hardly be achieved, and then, we need employ the help of reflection to
achieve the full cover of the signal. In Fig. 1-5, this delegate’s receiver can not only receive the
direct emit from the radiating panel but also the reflected signal from all directions. In this
situation, the reflected signal can strengthen the signal. In Fig.1-6, this delegate receives only
reflected signals, and the signal he gets in this situation is relatively weaker, but sufficient enough.
In order to avoid people’s screening of the IR signal, the installation height of the radiating panel
should be higher than 2.5m.
Fig.1-2 radiator coordinate illustration

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Fig.1-3 installation without obstacles
Fig.1-4. Direct emission and reflect
Fig. 1-5 Reflect
1.4.3 The surface of the walls, ceiling, floor and curtain
IR is just like visible light, and can be reflected by shining, smooth surface and absorbed by dark,
rough surface. The reflected light generally can help by transmitting signals, and won’t cause any
damaging interference. In a room with shining, smooth surfaces, the required power of the
radiating panel is lower than the room with dark, rough surfaces, as curtain and carpet.
Otherwise, the reflecting effect can be very different when the texture of the floor is different: the
shadow of the walls and furniture can interfere the IR transmitting. But if we use enough radiating
panels and allocate them properly, this problem can be solved. At the same time, it should be
noticed that the radiating panels cannot positioned to face the windows without curtains, which
can reduce the radiating effect. As shown in Fig. 1-7, there is difference in the reflection effects
for floors of different texture.

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80%
100%
40%
100%
Fig. 1-7 there is difference in the reflection effects for floors of different texture
1.4.4 The coverage of the radiating panel
In the system, the coverage is decided by radiating controller’s carrier wave and the radiating
panel’s output power, and the coverage will be enlarged when there are more radiating panels. The
radiating panels’ total radiant intensity is allocated in the controller according to the amount of the
carrier wave, and when the used carrier wave increase, the coverage’s percentage will decrease
accordingly.
As shown in the following figure (the white part),the crossing area of the radiation allocation area
and the receiving area of the people’s receiver is the coverage. Within the coverage area, if the
radiating signal can reach the receiver directly, the intensity of the direct signal can be enough to
be received. Here the following are some illustration figures for installation for your reference:
15°installation figure
45°installation figure

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90°installation figure
1.4.5 Floor area of overlapping and multi-path effects
The installed radiation board in meeting room, if was overlapping, the overall coverage may be
greater than the radiation of two separate panels. Radiation intensity is greater than the area
needed.(As shown in the Figure)
The added area increases the coverage
The receiver machine receive signal from many radiation boards. It may be offset by delay, or
can’t receive signal at all. Signal delay can be compensated by radiating panel switch delay
compensation.
The signal delay reduces the coverage area

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Chapter 2 Digital Infrared Transmitter
2.1 Overview
VIS-VLI700A-4/-8/-16 IR transmitter is the main part of the digital IR distribution system. To
transfer the simulation audio, compress code, full digital DQPSK transfer. The system can send 16
kinds of languages. IR transmitter can be installed on 19-inch standard rack, the easy storage and
safekeeping.
2.2 Features
1.Compliant to IEC 61603-7 and IEC 60914
2.Compatible with any other IR simultaneous interpretation system compliant to IEC 61603-7
3.DQPSK digital modulation/demodulation technology
4.Transmitting in 2~8 MHz frequency band eliminates disturbance from high frequency lighting
systems
5.Capable of distributing a maximum of 4,8,16 or 32 audio channels
6.Auxiliary mode for distribution of music to all channels during a break
7.Slave mode for distribution of signals from another transmitter allows multiple rooms to be used
8.Radiator and system status indication via display and indicators
9.Each transmitter can be assigned a unique name by the installer for easy identification in a multi-
transmitter system
10.Automatic distribution of emergency messages to all channels
11.Automatic synchronization to the number of channels in use by the CLEACON system
12.Each audio channel can be assigned a language name for easy identification
13.Adjustable sensitivity for each input to enable fine tuning of audio levels, support levels
indicating of audio input channel quality modes: Mono, standard quality, maximum 16 channels
Mono, perfect quality, maximum 8 channels Stereo,
standard quality, maximum 8 channels Stereo, perfect quality, maximum 4 channel
14.With 16 interpretation output channels for recording
15.Universal mains power facility allows worldwide use
16.Conference hall privacy; the congress venue itself acts as a barrier to infrared signals escaping
and being overheard, as infrared is unable to pass through opaque objects such as walls
17.Suitable for various kinds (small/medium/large international) of conference halls and outdoor
venues
18.Support the interpreter unit connection directly(by optional firmware
VIS-VLI700-FW)
19.Support 16 channel analogue audio input and 16 channels analogue audio output.
20.Support 2 transmitters can work as master and slaver mode for 32 channel language
distribution
21.Support optional Dante port for connecting to Dante network
22.Flexible configuration of channels and+channel quality modes: Mono, standard
quality.maximum 16 channels Mono, perfect quality,maximum 8 channels Stereo,standard quality,
maximum 8 channels Stereo, perfect quality,maximum 4 channel
2.3 Installation
The system controllers are made of metal and work with many other equipments.
Furthermore, the system controller can also be installed on standard 19’’ cabinet, as shown in the
following figure.

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2.4 VIS-VLI700A-4, VIS-VLI700A-8 ,VIS-VLI700A-16
Transmitter
Front panel
①Power On/Off
②LCD display to show the setting menu
③Menu button
④Channel input status
⑤Small radiator window
Small window is transmitting the same infrared
signal as the radiator output for monitor purpose
⑥Monitor headphone jack
Rear panel
⑦Audio signal Input 4, 8, or 16 audio connectors to connect external audio input signals. The
number of connectors depends on the transmitter model.Audio signal output
⑧Audio signal output 4, 8, or 16 audio connectors. The number of connectors depends on the
transmitter model. System Power Indicator
⑨Ground screw Connect the processor unit to the ground
⑩Auxiliary audio L input Female XLR connectors for external audio inputs to connect auxiliary

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balanced audio signals such as music, floor language
⑪Auxiliary audio R input
Female XLR connectors for external audio inputs to connect auxiliary balanced audio signals such
as music, floor language or emergency audio signal
⑫Fire alarm linked trigger interface
When this switch is closed, the emergency audio signal on the Aux-R input is distributed to all
output channels and overriding all other audio inputs
⑬HF signal input
1 BNC connector for receiving HF signal from other transmitter
⑭HF signal output
6 BNC connectors for output HF signal to radiator. To each connector, up to 30 radiators can be
connected
⑮AUDIOLINK port
Connect to the conference main unit
VIS-DCP2000 series or connect to the interpreter unit VIS-INT64
⑯Dante
Connect to the Dante network, support maximum 8 ch digital audio in or 8 ch digital audio out
For communication between the conference main unit and the PC under TCP/IP protocol to realize
Web server and remote controlling; furthermore, it enables remote controlling by wireless touch
panel through central control system
⑰Ethernet
⑱RS232
For connecting to a central control system for central controlling
⑲Power inlet
support AC100V-240V 50Hz/60Hz, self-adaptive.
2.5 Connection
Typical system connection includes:
⚫to CLEACON series full digital networked DSP conference system
⚫to interpreter unit
⚫to external audio sources
⚫to emergency signal switch
⚫to another transmitter
2.5.1 To CLEACON full digital networked DSP conference system
The transmitter can be directly connected to the AUDIOLINK network of the CLEACON full
digital networked DSP conference system. Use an CAT5 cable to connect one of the
AUDIOLINK sockets of the transmitter to the CLEACON network (see the next figure). The
network mode must be enabled with the configuration menu.

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2.5.2 To the interpreter
The transmitter can be directly connected to the interpreter unit VIS-INT64 or VIS-INT64S by
AUDIOLINK, but the power adaptor is necessary for the first interpreter unit connected from the
transmitter unit. The power consumption is 9W, when the speaker of interpreter unit is on. The
power adaptor is DC48V 3A. It is necessary to calculate power for connecting the sum of all
interpreter unit and power loss of extension cable.
The DCP 2000 can directly supply power to the interpreter unit, so no additional power supply is
needed. The connection is made through the network cable by CU/DU behind the controller, and
the connection of subsequent interpreter units can be made through the cascade.
2.5.3 To the external audio source
The transmitter has up to 32 audio inputs (depending on the transmitter type and work mode) to
interface with external asymmetrical audio sources, such as congress systems from other
manufacturers or for music distribution. The audio signals (stereo or mono) are connected to the
audio input 3pin connectors.
2.5.4 To the emergency signal switch
To use emergency function, fire alarm linked trigger interface (normally open) must be connected

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to the emergency switch connector. When the switch is closed, the audio signal on the Aux-Right
input is distributed to all output channels and overriding all other audio inputs. “ALARM” will be
displayed on the LCD at this moment.
2.5.5 To another transmitter
Max. 7 transmitter can work as master and slave mode for distribution language on multiroom.The
transmitter can be operated in slave mode to loop-through the IR radiator signals from a master
transmitter. One of the six radiator outputs of the master transmitter is connected with an RG59
cable to the radiator signal loop-through input of the slave transmitter. The Transmission mode of
the slave transmitter must be set to ‘Slave’.
Two transmitters can work as a 32 channels distribution system. The transmitter can be operated in
serial mode to loop-through the IR radiator signals from a master transmitter. One of the six
radiator outputs of the master transmitter is connected with an RG59 cable to the radiator signal
loop-through input of the serial transmitter. The Transmission mode of the serial transmitter must
be set to ‘Serial’.

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2.6 Controls and indicators
⚫Power switch
⚫Graphic LCD with back-lighting displays status and menu of the system configuration,
supporting multi language menu
⚫Four buttons for configuration
⚫Channel active indicators
2.7 Interconnection
⚫2female XLR connectors for external audio inputs to connect auxiliary balanced audio signals
such as music, floor language or emergency audio signal
⚫16 audio signal output connectors (phoenix sockets) for output multi-channel audio
⚫16 audio signal input connectors (phoenix sockets) to connect external unbalanced audio input
signals
⚫6 BNC connectors for output HF signal to radiator. To each connector, up to 30 radiators can
be connected
⚫1 BNC connector for receiving HF signal from another transmitter
⚫Audio-Link Port for connecting to Interpreter Unit(optional firmware VIS-VLI700-FW) or
VIS-DCP2000
⚫DANTE port for connecting to Dante network for the digital audio(Optional VIS-DANTE
module)
⚫Ethernet and RS232 ports for connection to computer
⚫Emergency signal interface: when the public emergency system is active, alarm signal can be
fed to all channels automatically
⚫Power supply socket
2.8 Specification
System Specifications
Modulation.................................................................DQPSK, according to IEC 61603-7

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Modulation frequency................................................2 to 8 MHz
Carriers 0 to 5:2 to 6 MHz, according to IEC 61603-7
Frequency response...................................................20 Hz to 10
kHz (-3dB) at standard quality;20 Hz to 20 kHz
(-3dB)at perfect quality
THD at 1 kHz.............................................................<0.05%
Isolation......................................................................>80 dB
Dynamic range...........................................................>90 dB
Weighted SNR............................................................>85 dBA
Electrical
Unbalanced audio inputs .........................................-12 dBVto +12 dBV nominal
Balanced audio inputs...............................................-6 dBV to+18 dBV nominal
Emergency switch connector ....................................2-PIN 3.81 mm
Phoenix connector, alarm signal control input
Headphone output......................................................32 Ohm to 2
kOhm
HF input/output..........................................................75 Ohm
Power supply..............................................................AC 100 V - 240 V, 50 Hz / 60 Hz
Power consumption....................................................Maximum 25
W
Mechanical
Mounting...................................................................Brackets for 19" rack
mounting or fixing to a table top; detachable feet for free-standing use on a table top
Dimensions h x w x d (mm)......................................88 × 483 × 266
Weight.......................................................................7.5 kg
Color..........................................................................Black
2.9 VIS-VLI700A IR transmitter operation interface
①Turn on the switch button to access the main interface
②Press the "ENTER" to enter the menu screen. Then press the "▼" key to stroll down, Total
Channel/AudiQuality/Audio Monitor/IR Setting/Auto Floor/Download, Default/Version, will be
displayed in order. You can press "ENTER" again to select a menu item, and press "ESC" to exit
the menu interface.
③Enter the "Audio Quality" settings by pressing "ENTER". Press the "▼" to choose between SQ
(Standard Quality) and HQ (High Quality). Press "ESC" to exit the setting.

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④Press "ENTER" to access the "Channel Monitor" interface. The audio monitoring interface
offers a selection of 16 channels ranging from 0 to 15 for audio monitoring. Press "▲" or
"▼" keys to choose the channel number, and it supports continuous scrolling by holding
down the button. Press "ESC" to exit the setting.
...........
⑤Press "ENTER" to access the "IR Setting" interface. Press "▼" to select the maximum channel
count from options like Off, 16, 8, or 4. Press "ESC" to exit the setting.
⑥Press "ENTER" to enter the "Auto Floor" interface, where you can choose between "On" and
"Off" settings. Enabling this option allows each channel that has been configured to transmit the
original audio. Press "ESC" to exit the setting.