Avlink BX-3088 User Manual

User Manual

BX-3044 BX-3084

BX-3088

BX Series Matrix Switching Systems

BX Matrix Switching Systems—User Manual

Before You Use the System

1、Read manual——Carefully read the manual before you use the system.
2、Installation environment——The system should be installed indoor only. Install either on a

sturdy rack or desk in a well-ventilated place.

3、Lightning——Unplug the power cord during lightning or after a prolonged period of non-use

to avoid damage to the equipment.

4、Maintenance——Only qualified technical engineers or specified distributors are permitted to

repair or replace components and parts of the equipment upon failure.

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BX Matrix Switching Systems—User Manual

Table of Contents

1.0 Matrix System Overview…………………………………….……………………………...4

1.0.1 BX Matrix System……………………………………………………………………...4

1.0.2 BX Matrix System Packing…………………………………………………….............4

2.0 BX Matrix Host Installation………………………………………………………………...5

3.0 BX Matrix System Categories……………………………………………………................6

4.0 Matrix System Front and Rear Panels………………………………………………………6

4.0.1 BX-3044 Front and Rear Panels......................................................................................6

4.0.2 BX-3084 Front and Rear Panels………………………………………………..............7

4.0.3 BX-3088 Front and Rear Panels………………………………………………..............7

5.0 BX Matrix System and Perpherals Connection………………………………….………….8

5.0.1 Input/Output Ports………………………………………………………………………9

5.0.1.1 Video Connecting Cable…………………………………………..………………..9

5.0.2 BX Matrix System and Control Computer Connection…………………………………9

5.0.3 Remote Control and Settings…………………………………………………..............10

5.0.3.1 RS-232 Communication Port and Connection…………………………………….10

5.0.3.2 RS-485 Communication Port……………………………………………………...12

5.0.3.3 On/Off Switches…………………………………………………………………...13

5.0.3.4 BX Matrix System and Control System Connection……………………………...15

6.0 Matrix System Control Panel Operation…………………………………………………....17

6.0.1 Input/Output Switching Key Operating Mode………………………………………....17

6.0.2 Front Panel Key Functions……………………………………………………………..17

6.0.3 Operation Examples…………………………………………………………………....18

7.0 Matrix Application Software………………………………………………………………..20

7.0.1 Software Introduction…………………………………………………………………..20

7.0.1.1 Software Description………………………………………………………………20

7.0.1.2 Software Activation………………………………………………………………..20

7.0.2 Software Features……………………………………………………………………....20

7.0.2.1 Main Operating Interface Features………………………………………………...21

7.0.2.2 Disconnect Function Keys…………………………………………………............22

7.0.2.3 Select all output、DeSelect all output Switching Function Usage………………..23

7.0.2.4 Disconnect all Command………………………………………………………….23

7.0.2.5 Memory Function Usage…………………………………………………………..24

7.0.2.6 Scan Function Usage……………………………………………………………....24

7.0.2.7 Options Function Applications……………………………………………............24

7.0.2.8 Exit Function Applications………………………………………………………..25

7.0.2.9 Other Applications………………………………………………………………...25

8.0 Communication Protocol and Control Command Code……………………………............25

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BX Matrix Switching Systems—User Manual

9.0 BX Matrix System Technical Parameters…………………………………………………26

10.0 Common Problems and Solutions……………………………………………………….27

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BX Matrix Switching Systems—User Manual

1.0 Matrix System Overview

1.0.1 BX Matrix System

The BX Matrix switcher is a high performance switching equipment for video frequencies. It
is used for multiple input/output cross switchingof video signals. It provides independent
RGBHV component input/output terminals. Each RGBHV component signal is transmitted
separately and switched separately, thereby minimizing signal attenuation and ensuring high
definition graphics signal output.

The BX Matrix is used mainly in TV broadcasting projects, multi-media conference halls,
large display projects, TV teaching and command control centers. It boasts features of power
interruption protection during power surge, LCD display and synchronous and separate
audio/visual switching functions. Its RS-232 communication port enables convenient
communication with remote control equipment. This manual describes using of the BX-3088
model. Refer to BX-3088 User Manual for using of other models of matrix systems.

Figure 1-1 BX-3088 Matrix

1.0.2 BX Matrix System Packing

BX Matrix Host

RS-232 Communication Connecting Cable

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BX Matrix Switching Systems—User Manual

Power Cord

BX Matrix Test and Application Software CD

User Manual

Green T erm inal(M) Quantity

BX-3044 2 Pcs
BX-3084 2 Pcs
BX-3088 2 Pcs

2.0 BX Matrix Host Installation

The BX Series Matrix Host has a black metallic housing. It can be placed on a sturdy desk

or installed on a 19-in rack. See Figure 2-1 below:

Figure 2-1 Installing BX Matrix Host on a Standard Rack

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BX Matrix Switching Systems—User Manual

3.0 BX Matrix System Categories

The BX Series Matrix has following models to meet different requirements of different
users:

Model

Technical
Parameters

BX-3044 4 4 √ √
BX-3084 8 4 √ √
BX-3088 8 8 √ √

Video Input Jack Video Output Jack RS-485 Port RS-232 Port

4.0 Matrix System Front and Rear Panels

4.0.1 BX-3044 Front and Rear Panels

Figure 4-1 BX-3044 Front Panel

Figure 4-2 BX-3044 Rear Panel

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BX Matrix Switching Systems—User Manual

4.0.2 BX-3084 Front and Rear Panels

Figure 4-3 BX-3084 Front Panel

Figure 4-4 BX-3084 Rear Panel

4.0.3 BX-3088 Front and Rear Panels

Figure 4-5 BX-3088 Front Panel

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BX Matrix Switching Systems—User Manual

Figure 4-6 BX-3088 Rear Panel

5.0 BX Matrix and Peripherals Connection

Figure 5-1 BX Matrix System Connection

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BX Matrix Switching Systems—User Manual

5.0.1 Input/Output ports

Referring to the different models, the video signal input/output jacks are formed by the 4th
row and 8th row BNC female connectors. The BX-3088 video signal input/output jack channels
are numbered from left to right as NO.1 to NO.8 (in two rows). The connectors are indicated
from upper to lower as R, G, B, H, and V signal terminals. Refer to the drawing on the housing
for other types of connectors.

Different models of BX matrix systems provide a different number of input/output
connectors where users can connect to different video equipment including CD/DVD players,
graphics workstations, and number display. The output connectors can be connected to projectors,
video recorders and displays.

5.0.1.1 Video Connecting Cable

The BX matrix supports various types of AV video frequencies and VGA signal sources.
The AV signal source equipment must have RGBHV signal output terminals; the VGA signal
source must have RGBHV signal output terminals.

The BX matrix BNC connector connection is shown in Figure 5-2 below:

Figure 5-2 BNC Connection

If the VGA signal source equipment has no RGBHV output terminal, you are recommended
to use a VGA-RGB converter to get high quality RGB output signals.

Pleas use a 5-wire RGB signal cable for connection to input/output equipment. Connect the
R (Red), G (Green), B (Blue), H (Horizontal sync) and V (Vertical sync) BNC connectors of the
signal source equipment output terminal separatedly to the same channel RGBHV connectors of
the BX matrix inputs. Also, connect the RGBHV connectors of the BX matrix outputs to the
RGBHV input connectors of the output equipment through a 5-wire RGB signal cable.

NOTE: The RGBHV connectors at both ends of the signal cable must correspond to each
other, otherwise loss of color reproduction and even no signal output could happen.

5.0.2 BX Matrix System and Control Computer Connection

Use the RS-232 connecting cable to connect the computer serial port (COM1 or COM2) to
the RS-232 communication port of the BX matrix host. The computer can then be used to control
the BX matrix after installation of application software.

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BX Matrix Switching Systems—User Manual

Figure 5-4 BX Matrix and Computer Connection

5.0.3 Remote Control and Settings

The BX matrix provides standard RS-232 and RS-485 serial communication ports. Aside
from using the front panel keys for switching operation, you are also permitted to use the RS-232
and RS-485 serial communication ports for remote operation. It also supports RS-485 serial
control.

5.0.3.1 RS-232 Communication Port and Connection

The RS-232 port is a 9-pin female connector. The Leg functions are shown in the table
below:

Pin No. Leg Description

1 N/u Null

2 Tx Send

3 Rx Receive

4 N/u Null

5 Gnd Ground

6 N/u Null

7 N/u Null

8 N/u Null

9 N/u Null

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BX Matrix Switching Systems—User Manual

Figurem 5-5

Figure 5-5（a）

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BX Matrix Switching Systems—User Manual

Figure 5-6

Note: The Matrix RS-232 port is defined as DCE.

5.0.3.2 RS-485 Communication Port

You can use the RS-485 port to control more than one BX product.
The RS-485 Port as shown in Figure 5-7 below:

Figure 5-7

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BX Matrix Switching Systems—User Manual

5.0.3.3 On/Off Switches

Figure 5-8

A. DIP SW-8:RS-232/RS-485 switches ON/OFF
ON:RS-232 Enables Single System or RS-485 Serial Master
OFF:RS-485 Enables RS-485 Serial Slave

B. DIP sw-6/7:RS-485 Terminator ON/OFF
ON:Terminator ON
OFF:Terminator OFF

C. DIP sw 1 to 5 Setting（address setting）

The ID number determines the position of a Matrix system. When multiple BX products are
connected to one PC or when the Matrix products are serially connected, the ID number decides
which BX product is to be controlled. Use the on/off switches 1, 2, 3, 4, 5 on the rear panel to set
the ID number as shown in Figure 5-2 below:

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BX Matrix Switching Systems—User Manual

On/Off Switching Positions ID Address

SW1 SW2 SW3 SW4 SW5

（Decimal）

Software ID

Address

On/Off

（Binary）

（Hexadecimal）

0 00 00000 OFF OFF OFF OFF OFF
1 01 00001 OFF OFF OFF OFF ON
2 02 00010 OFF OFF OFF ON OFF
3 03 00011 OFF OFF OFF ON ON
4 04 00100 OFF OFF ON OFF OFF
5 05 00101 OFF OFF ON OFF ON
6 06 00110 OFF OFF ON ON OFF
7 07 00111 OFF OFF ON ON ON
8 08 01000 OFF ON OFF OFF OFF

9 09 01001 OFF ON OFF OFF ON
10 0A 01010 OFF ON OFF ON OFF
11 0B 01011 OFF ON OFF ON ON
12 0C 01100 OFF ON ON OFF OFF
13 0D 01101 OFF ON ON OFF ON
14 0E 01110 OFF ON ON ON OFF
15 0F 01111 OFF ON ON ON ON
16 10 10000 ON OFF OFF OFF OFF
17 11 10001 ON OFF OFF OFF ON
18 12 10010 ON OFF OFF ON OFF
19 13 10011 ON OFF OFF ON ON
20 14 10100 ON OFF ON OFF OFF
21 15 10101 ON OFF ON OFF ON
22 16 10110 ON OFF ON ON OFF
23 17 10111 ON OFF ON ON ON
24 18 11000 ON ON OFF OFF OFF
25 19 11001 ON ON OFF OFF ON
26 1A 11010 ON ON OFF ON OFF
27 1B 11011 ON ON OFF ON ON
28 1C 11100 ON ON ON OFF OFF
29 1D 11101 ON ON ON OFF ON
30 1E 11110 ON ON ON ON OFF
31 1F 11111 ON ON ON ON ON

Figure 5-2 ID Number Setting Table

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BX Matrix Switching Systems—User Manual

5.0.3.4 BX Matrix System and Control System Connection

A. If your PC provides RS-232，please follow connection as shown in Figure 5-9 below:

Figure 5-9

NOTE: 1. RS-232 connection refer to previous Figure for operation；

2. RS-232 or RS-485 baud rates: 9600bps, no odd or even calibration address，8bit data
transmission address，1bit stop address（96，N，8，1）；

3. Serial connection between Matrix RS-485 as follows:

TX（+） TX（+）
TX（-） TX（-）
RX（+） RX（+）
RX（-） RX（-）

4. Each DIP sw1-5 address must not set to same ID number.

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BX Matrix Switching Systems—User Manual

B. If your PC provides RS-485，please follow conection as shown in Figure 5-10 below:

Figure 5-10

NOTE: 1. RS-485 baud rate: 9600bps, no odd or even calibration address，8bit data transmission

address，1bit stop address（96，N，8，1）；

2. Connect your PC RS-485 port to the Matrix RS-485 port as follows:

TX（+） TX（+）
TX（-） TX（-）
RX（+） RX（+）
RX（-） RX（-）

3. Serial connection between Matrix RS-485 ports as shown below:
TX（+） TX（+）
TX（-） TX（-）
RX（+） RX（+）
RX（-） RX（-）

4. Each DIP sw1-5 address must not set to same ID number.

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BX Matrix Switching Systems—User Manual

6.0 Matrix System Control Panel Operation

6.0.1 Input/Output Switching Key Operating Mode

Fast video switching of the Matrix systems can be done by pressing keys on the front panel
(refer to the “Front Panel Key Pressing Instructions” for detail key pressing).
Operation methods as follows:
“Output Channel＂+“Input Channel＂
Description:
“Output Channel＂
The “OUT Row 1-8” keys on the front panel represent output channels 1 to 8 for connection to
peripheral display.
“Input Channel＂
The “IN Row 1-8” keys on the front panel represent input channels 1 to 8 for connection to the
currently connected channels of the signal source to be switched.

6.0.2 Front Panel Key Functions

Part Function Key Functions

1

2

3 Input channel selection keys used for setting video output

4

ALL

LCD display shows current BX matrix status and operation
hints.
Output channel selection keys used for setting video output
channels or for selection of Status Mode or Reserved
Number.

channels or for selection of Status Mode or Reserved
Number.
Implement all output selection keys via certain input route.

---Example: First press the “ALL” key, then select the
input channel to output to all output channels; first press
the “ALL”key, then press the “OFF” key to close all the
presently displayed swtitching status.
Close output channel key.

5

6

OFF

STO

---First press to close the output channels, then press the
“OFF” key to close the specified channel.

The “Reserve Key” saves all current input/output
corresponding relations.

---Example: Press the “STO”key, then press the output
channel key which you want to save all currently
displayed input/output corresponding relations.

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BX Matrix Switching Systems—User Manual

Part Function Key Functions

7

RCL

The “Retrieve Key” retrieves the saved input/output
corresponding relations.

---Example: First press the “RCL” key, then press the
previously saved output channel key to retrieve the saved
input/output status and implement this status switching.

6.0.3 Operation Examples

Examle 1: Synchronously switch the NO. 1 video signal to the NO. 3 and 4 output channels.

Key LCD Display Operation

1. Press the NO. 3 key of the
output channel for 2 seconds,
then enter the input channel
when the red 0 on LCD begins
to flicker.

2. Press the NO.1 key of the
Input channel for 2 seconds for
selection of NO.1 channel to
input into NO.3 channel
for output. The LCD shows
input channel NO.1 at the NO.3
channel.

3. Press the NO.4 key of the
output channel for 2 seconds
and then enter the input channel
when the red 0 on LCD flickers.

4. Press the NO.1 key of the
input channel for 2 seconds for
selection of NO.1 channel for
input and NO. 3 and 4 channels
for output. LCD atIN row of
NO.3 and NO.4 channels shows

1.

Example 2: Operation for synchronously switching video signals from NO.4 channel to

NO.1, 3, 5 and 6 output channels.

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BX Matrix Switching Systems—User Manual

Key LCD Display Operation

1. Press the NO.1 key of the
output channel for 2 seconds and
then enter the input channel when
the red 0 on LCD begins to
flicker.

2. Press the NO.4 key of the input
channel for 2 seconds for
selection of NO.4 channel for
input and NO.1 channel for
output. Enter the output channel
when LCD shows input channel
“4” at NO.1 channel on IN row.

3. Press the NO.3 key of the
output channel for 2 seconds and
then enter the input channel when
the red 0 on LCD begins to
flicker.

4. Press the NO.4 key of the input
channel for 2 seconds for
selection of NO.4 channel for
input and NO.1 and 3 channels
for output. Enter the output
channel when LCD shows “4” at
NO.1 and NO.3 channels on IN
row.

5. Press the NO.5 key of the
output channel for 2 seconds and
then enter the input channel when
the red 0 on LCD begins to
flicker.

6. Press the NO.4 key of the
output channel for 2 seconds for
selection of the NO.4 channel for
input and the NO. 1, 3 and 5
channels for output. Enter the
output channel when NO.1, 3 and
5 channels on LCD show 4 on IN
row.

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BX Matrix Switching Systems—User Manual

Key LCD Display Operation

7.0 Matrix Application Software

7.0.1 Software Introduction

7. Press the NO.6 key of the
output cahnnel for 2 seconds and
then enter the input channel when
the red 0 on LCD begins to
flicker.

8. Press the NO.4 key of the input
channel for 2 seconds for
selection of the NO.4 channel for
input and the NO.1, 3, 5 and 6
channels for output. NO.1, 3 and
5 channels on LCD all show
“4”on IN row.

The 《AV Matrix》 Matrix control software applies to different input/output matrixes.

7.0.1.1 Software Description

The《AV Matrix》 matrix testing software is an application tool developed for matrix testing
and application. The software operation environment is as follows:
Window98/2000/NT/XP operatng systems
32M interal memory or above
10M hard disk space or above
CD-ROM
At least one serial communicatin port

7.0.1.2 Software Activation

First, you must turn off power both to the BX matrix and to the computer. Then, connect the
matrix RS-232 port to the PC RS-232 port using the bundled communication cable. (Refer to the
previous section “BX Matrix and Control Computer Connection.”;

Turn on power to the BX matrix and the computer:

Activate the AV Matrix.exe on the bundled CD-ROM in the control computer to enter the
control software interface.

7.0.2 Software Features

The software controls signal connection between the corresponding input port and output port
as required. The main operation window is shown in Figure 7-1 below:

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BX Matrix Switching Systems—User Manual

Figure 7-1 《AV Matrix》Control Software Usage Interface

Scroll on the left lower corner to view contents as shown below.

7.0.2.1 Main Operation Interface Features

Refer to the window menu above, the interface blue area shows crossing matrix of output
ports 01-08 and input ports of 01-08. On the lower right hand corner, you can select either
“Video” for signal input switching or “Disconnect”to close all output ports. Click to check the
white box to the left of “Video” for video signal transimission.

Examples for Selecting Matrix Switching Functions:
Example 1: Now there is a BX-3088 matrix having all the input/output ports properly

connected to the equipment. There are two ways of operation if you want to set channel 1 video
to channels 2, 3 and 5 for output and channel 3 video to channel 6 for output:

First way: Select the corresponding icon on the matrix and directly click

，switching is then completed.

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BX Matrix Switching Systems—User Manual

Second way:
Step 1: First select the “Output”number keys 02, 03 and 05 to the right, and select the “Input”

number key 01 to the bottom. Afterwards, press consecutively the previously selected “Output”
number keys 02, 03 and 05 (or you can press the “Deselect all output” key). This way, you have
selected “Input” 01 and “Output” 02, 03 and 05 switching.

Step 2: First select the “Output” number key 06 to the right, and select the “Input” number

key 03 to the bottom. Afterwards, press the previously selected “Output” number key 06 (or you
can press the “Deselect all output” key). This way, you have selected Input 03 and Output 06
switching.

Upon completion of the above 2 steps, you have actually completed the switching operation of
having Video channel 1 to Output channels 2, 3 and 5 while at the same time successfully
switched from Video channel 3 to Output channel 6.

7.0.2.2 Disconnect Function Keys

Close all the unused output ports.

A specific example of operation is described below:

The present input and output relations are shown in Figure 7-2 below:

Figure 7-2

Now, you have to close the output ports 03、05、and 06.

Step 1: First press down the output number keys 03, 05 and 06 to the right;

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BX Matrix Switching Systems—User Manual

Step 2: Press the “Disconnect” key;

Step 3: Press the previously-pressed output number keys 03, 05 and 06 (or press the
“Deselect all output”key) to complete the operation.
The final results will be as shown in Figure 8-3 below:

Figure 8-3

7.0.2.3 Select all output、DeSelect all output Switching Function Usage

（1）Select all output Function Description: You can use this function to select one port for input

and all output ports for output.

A specific example of operation is described below:

Example: Now, you have a BX-3088 matrix with all input and output ports properly
connected to the equipment. The needed input/output ports should be set to video channel 1
while switching all output ports to output.
Press the “Select all output” key, then press the input number key 01 below. Press all the icons

along 01 row to turn into to complete the operation.
（2）”DeSelect all output”function description: it is used to close “Select all output” function.

7.0.2.4 Disconnect all Command

Function Description: To close all the switching methods.

Press the “Disconnect all” key to close connection to all input and output ports.

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BX Matrix Switching Systems—User Manual

7.0.2.5 Memory Function Usage

Function Description: To store and retrieve.

Store Functin Description: The Store Function saves all the present input/output switching

relations to any Locations from #1 to #8 you desired.

A specific example of the Store Function is described below:

Stores all the present input/output switching relations to Location #1. First, select Location
#1，as shown in the figure below:

，then click the save key to save all the present

input/output switching relations to Location #1.

Retrieve Function Description: To retrieve the saved input/output switching relations.

A specific example of the Retrieve Function is described below:

To retrieve the input/output corresponding relations saved in Location #1. First, select
Location #1 as shown in the figure below:

，then click the Load key to retrieve all the

input/output corresponding relations stored in Location #1.

7.0.2.6 Scan Function Usage

Use the mouse to click the Scan key to refresh the AV Matrix operating interface.

7.0.2.7 Options Function Applications

Activation Function:

In the main menu, select Options to prop up the Options window as shown in Figure 7-4（a）

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BX Matrix Switching Systems—User Manual

Figure 7-4（a） Figure 7-4（b）

Function Description:

Linking Methods: In “ ” select either COM1 port or COM2 port as shown in
Figure 7-4（b）; in “ ” select 9600 for signal transmission as shown in Figure 7-4（a）

7.0.2.8 Exit Function Applications

Function Description: To exit the operating software.

7.0.2.9 Other Applications

Displays the presently saved switching status as shown in Figure 7-5 below:

Figure 7-5

When Video corresponding to Output is open, it shows the Output ports corresponds to the

Video Input ports; when they are close the word None will be shown in red in the above table.

8.0 Communication Protocol and Control Command Code

Communication Protocol: Baud rate 9600bps, no odd or even calibration bit address, 8bit
transmission address, 1bit stop address.

Refer to the “Command list.pdf” on the CD-ROM for the command system.

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BX Matrix Switching Systems—User Manual

9.0 BX Matrix System Technical Parameters

Model

BX-3088 BX-3084 BX-3044
Technical Parameters
Video Frequency
Enhancement 0dB
Band Width
Maximum Transmission

250MHz (-3dB)，Full Load

20nS(±1nS)
Delay
Switching Speed 60nS(Longest Time)
Signal T ype

RGBHV，RGBS，RGsB，RsGsBs，Composite V ideo
Video Input
Connector 8 BNC Female

Connectors

8 BNC Female
Connectors

4 BNC Female
Connectors

Signal Strength 1Vp-p Y Composite Video,0.7Vp-p RGB(Computer

Signal)；0.3Vp-p R-Y & B-Y Composite Video
Min./Max. Voltage Modulated Signal 0.5V~2.0Vp-p
Impedance

75Ω
Video Output
Connector 8 BNC Female

Connectors

4 BNC Female
Connectors

4 BNC Female

Connectos
Min./Max. Voltage 2.5Vp-p
Impedance

75Ω
Synchronous Signals
Input/Output Signal Type

RGBHV，RGBS，RGsB，RsGsBs
Input Voltage 0.5V-5.0Vp-p,:4.0Vp-p Normal
Output Voltage AGC-TTL: 5Vp-p,unterminated
Input Impedance
Output Impedance
Polarization

510Ω

75Ω

Positive or Negative（Idential with Input）
Control T ype
Serial Control Port

RS-232，9-Pin Female D-sub Port
Baud Rate and Protocol 9600bps, no odd or even calibration address, 8bit

transmission Address, 1bit Stop Address
Serial Control Structure
Control Procedure
Specifications
Power

TX，RX，GND

《AV Matrix》

100VAC~240VAC,50/60Hz，International Auto-Switch

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BX Matrix Switching Systems—User Manual

Model

BX-3088 BX-3084 BX-3044
Technical Parameters
Temperature

Storage, Operating Temp.: -40℃~+85℃
Humidity Storage, Operating Humidity:10%~90%
Housing Measurements: 485(L)X286(W)X140mm(H)
Product Weight 6000g
Median Failure Interval

30，000 Hours
Warranty 1 year warranty, lifetime protection

10.0 Common Problems and Solutions

1. What to do if the BX matrix front panel keys switching not responsive?
Answer: The BX matrix front panel keys employ scanning testing and require longer response

time. Press the keys for 2 seconds and then release. This way, key switching will be
responsive in operation.

2. What to do if matrix does not display or color display is abnormal after hot plug?
Answer: Switching of the matrix system goes through the IC chips. If the voltage difference

between the input signal equipment and the matrix equipment is too large, hot plug
could easily cause damage to the IC chips. Please turn off power to the system before
plugging or unplugging.

3. What to do if ghosting happens when RGB signals output to display?
Answer: Ghosting is often caused either by the projector, inferior cable quality or long

transmission distance. You are advised to adjust the projector or replace with better
quality cable.

4. What to do if discoloration happens or no video signal output?
Answer: Please check if connectors at both ends of the RGB signal cable are correctly

connected.

5. What to do if the serial port (usually refer to the computer serial port) fails to control the BX
matrix?
Answer: Check that the communication port set by the control software is correctly connected to

the corresponding serial port of the equipment. Also, check if the computer
communication port is in good order.

6. What to do if the corresponding graphics fail to output during BX matrix switching?
Answer: (1) Check if there is signal on the input end. If there is no input signal, it could be that

the input connection cable is broken or the connector gets loosen. You are advised to
replace the connection cable.

(2) Check if there is signal on the output end. If there is no output signal, it could be that

the cable is broken or the connector gets loosen. You are advised to replace the
connection cable.

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BX Matrix Switching Systems—User Manual

(3) Check if the output port number is the same as the controlled port number.
(4) If none of the above circumstances happen, it could be internal failure of the product

itself. You must send for repair by qualified technical engineers.

7. What to do if the power LED is not on, LCD has no display and no response in operation?
Answer: Check if the equipment power input is in good contact.

8. What to do if you sensed power leakage during plugging or unplugging of the video ports?
Answer: It could be that the equipment power is not properly grounded. You must properly

ground your equipment, otherwise product life can easily be shortened.

9. What to do if the LCD displays normally and the communication port has return code but no
graphics output?
Answer: (1) It could be that the video connectors got loosen. Simply replace the connectors.

(2) It could be the connection cable short-circuited. Simply replace the cable.
(3) It could be the connection cable is broken. Simply replace the cable.

10. What to do if the BX matrix panel keys and communication ports are out of order?
Answer: Check if the equipment power input is in good contact and the communication ports are

in good order. If yes, it could be some internal failure of the product, please send for
repair by qualified technical engineer.

11. What to do if operation and function failure occurred?
Answer: Check if the equipment and the matrix system are in proper connection. If the problem

persists, send the product to the maintenance center for repair.

NOTE:

Do not replace the power cord yourself. If the power cord is damaged, ask your distributor to

send qualified technician to replace it for you.

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Trademarks:

All the companies, brand names, and product names referred to this manual are the trademarks
or registered trademarks belonging to their respective companies.

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