AVGear MHD44 Manuale utente

HDMI Matrix Switchers System

User Manual

Please read this manual carefully before using this product.

Notes：

：：

：

This HDMI Matrix Switchers User Manual takes example of the Matrix model

MHD44.

iii

Safety O

eration Guide

In order to guarantee the reliable operation of the equipments and safety of the staff

，

please

abide by the following proceeding in installation, using and maintenance:

⑴

⑴⑴

⑴

The system must be earthed properly. Please do not use two blades plugs and ensure the alternating

power supply ranged from 100v to 240v and from 50Hz to 60Hz.

⑵

⑵⑵

⑵

Do not put the switcher in a place of too hot or too cold.

⑶

⑶⑶

⑶

As the power generating heat when running, the working environment should be maintained

fine ventilation, in case of damage caused by overheat.

⑷

⑷⑷

⑷

Please cut off the general power switch in humid weather or left unused for long time.

⑸

⑸⑸

⑸

Before following operation, ensure that the alternating current wire is pull out of the power

supply

：

．

Take off or reship any components of the equipment.

．

Take off or rejoin any pin or other link of the equipment.

⑹

⑹⑹

⑹

As to non-professional or without permission, please DO NOT try to open the casing of the

equipment, DO NOT repair it on your own, in case of accident or increasing the damage of the

equipment.

⑺

⑺⑺

⑺

DO NOT splash any chemistry substance or liquid in the equipment or around.

Contents

Introduction ............................................................................................................................. 1

1.1

About HDMI Matrix Switcher System ......................................................................................... 1

MHD Packing of the Product............................................................................................... 1

MHD Installation ..................................................................................................................... 2

Front View and Rear View of the Product........................................................................ 2

4.1

Front view of MHD44 ..................................................................................................................... 2

4.2

Rear view of MHD44 ...................................................................................................................... 2

External Connection.............................................................................................................. 2

5.1

Introduction of the Input and Output Connectors ...................................................................... 2

5.2

Connection of RS-232 Communication Port ................................................................................ 2

5.2.1

Connection with Control System .........................................................................................................2

5.2.2

Connection with Computer...................................................................................................................3

5.3

How to Connect with the Input and Output Terminals............................................................... 3

Operation of the EDID management ................................................................................. 5

6.1 Auto-EDID management ....................................................................... Error! Bookmark not defined.

6.2 Manual EDID switching ................................................................... Error! Bookmark not defined.

6.3 Restore the default EDID .................................................................. Error! Bookmark not defined.

Operation of the Control Panel........................................................................................... 9

7.1 Front Panel Description ....................................................................................................................... 9

7.2 Command Format of the Switching Operation ................................................................................. 9

7.3

Examples of Operation ................................................................................................................... 9

8. Usage of the Remote Controller ......................................................................................... 10

Communication Protocol and Command Codes..........................................................11

11.

Troubleshooting & Maintenance .................................................................................. 14

1. Introduction

1.1 About HDMI Matrix Switcher System

MHD series Matrix switcher is a high-performance digital signal switcher that can be used for

cross switching of multi computer and audio signal. Independent HDMI component and I/O

terminals make each component signal transmit and switch separately; this design can reduce

attenuation of signal transmission to minimum and output the image and audio signal in

high-fidelity quality.

AVG series switcher mostly apply in broadcasting TV engineering, multi-media meeting room, big

screen display engineering, television education, command control center or other fields.A/V

timing or separating switching function. With RS232 interface, it can be worked with PC, remote

control system and any other far-end control system devices. The user manual takes MHD44 as

the example, other models can take reference from it too.

1-1 MDH44 front view

2. MHD Packing of the Product

HDMI Matrix Switcher

IR remote

RS-232 Communication Cord

Power Supply Cord

3. MHD Installation

MHD matrix switchers adopt metal shell and can be stacked with other device. Moreover, they are

rack-mountable enclosure and can be installed in the standard 19 inches case.

4. Front View and Rear View of the Product

4.1 Front view of HD44

4.2 Rear view of HD44

5. External Connection

5.1 Introduction of the Input and Output Connectors

According to different type of matrix, computer signal I/O interface are made up of 4-channel

HDMI ports and DVI-D female ports respectively (digital audio included). Please refer to shell

silk-screen figure about other types of interface.

5.2 Connection of RS-232 Communication Port

Except the front control panel, the HDMI matrix switcher can be control by far-end control system

through the Ethernet control via the RS-232 communication port.

5.2.1 Connection with Control System

With the RS-232 port, the HDMI matrix switchers can be control by several kinds of control

systems.

This RS-232 communication port is a female 9-pin D connector. The

definition of its pins is as the table below.

No.

Pin Function

1 N/u Unused

2 Tx Transmit

3 Rx Receive

4 N/u Unused

5 Gnd Ground

6 N/u Unused

7 N/u Unused

8 N/u Unused

9 N/u Unused

F 5-1 9HDF

5.2.2 Connection with Computer

When the switcher connects to the COM1 or COM2 of the computer with control software, users

can control it by that computer.

To control the switcher, users may use the public COM software. Please refer the details in

Communication Protocol and Command Codes

F 5-2 MHD connecting to computer

5.3 How to Connect with the Input and Output Terminals

The HDMI matrix switchers may take DVD players, computers, graphic workstations and digital

showing platform as their input signal source, and projectors, video recorders, displayers and

amplifiers as their output signal destinations according to different situation.

—

——

—

3 HDMI connector

HDMI pin function

Number

Signal Name

Number

Signal Name

TMDS Data 2+

SHELL

TMDS Data 2 Shield

Hot Plug Detect

TMDS Data 2-

+5V Power

TMDS Data 1+

Ground

TMDS Data 1 Shield

DDC Data

TMDS Data 1-

DDC Clock

TMDS Data 0+

No Connect

TMDS Data 0 Shield

CEC

TMDS Data 0-

TMDS Clock-

TMDS Clock+

TMDS Clock Shield

System Diagram

：

：：

：

F5-4 HDMI matrix system connection

6. Operation of the EDID management

(For AVG HDMI/DVI matrix switcher, NOT including the 4x4 model)

EDID communication introduction

MHD/MDV matrix switcher are built in the EDID data inside, which can recognize most of the displays

and video source. When the display or video source are connected, the EDID communication will start

automatically.

But, the in-built EDID database can’t recognize all the devices. In this case, we need to manage the

EDID manually.

There are three solutions to manage the EDID:

1) Auto EDID Management.

The DV/MHD matrix will copy the EDID data from the most priority display, and using the new EDID

data as to be the standard. ( Check the term 6.1 )

2) Manually EDID switching.

The user can switch the EDID data manually, from a certain output to a certain input. It is the similar

operation to AV signal switching. ( Check the term 6.2 )

3) Factory default management. (Default).

It uses the default in-built EDID database to manage the EDID data. It is useful enough for most of

the cases. (Check the term 6.3)

Every time, you change the EDID data, all the displays will be blank for 3 seconds. The RS232

port will send out the feedback code.

No. EDID management

Solution

RS232 command

(ASCII, 9600bps. 8N1) The Operation of Front Panel Buttons

1 Factory Default

Management Setting

EDIDMInit. Press the buttons:

“←”

“

”

“

INPUT1

”

“

UNDO

”

2 Auto EDID Manage EDIDMAuto. Press the buttons:

“←”

“

”

“

INPUT2

”

“

UNDO

”

3 Manually EDID Switching EDIDM[X]B[Y]. Null

NOTICE: there is a “.” behind the command, which is easy to miss.

6.1. Auto EDID Management

When you are running the auto-EDID management by RS232 command or front panel operation, it will

copy the EDID data from the most priority display.

The priority principle:

HDMI/DVI OUTPUTS

Priority

1 High priority

8 Low priority

The most priority port is output 1.

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