PTN MHD44 User manual

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
MHD44
PTN HDMI Matrix Switchers 4x4
USER MANUAL
Version: MHD442013V1.3

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
NOTICE: Please read this user manual carefully before using this product.
Update History
Version
Date
Update Content
1.0
2013.01.29
First Version.
1.1
2013.01.29
Modified the EDID commands.
1.2
2013.03.28
Updated the operation order of the buttons.
1.3
2013.05.24
Modified the system diagram.
This manual is for operation instruction only, not for any maintenance usage.
The functions described in this version are updated till May 2013. Any changes
of functions and parameters since then will be informed separately. Please
refer to the dealers for the latest details.
This manual is copyright PTN Electronics Limited. All rights reserved. No part
of this publication may be copied or reproduced without the prior written
consent of PTN Electronics Limited.
All product function is valid till 2013-05-24.

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
Table of Contents
1. Introduction ...............................................................................................................1
1.1. Introduction of MHD44......................................................................................1
1.2. Package Contents ............................................................................................1
2. Features......................................................................................................................1
3. Specification ...............................................................................................................2
4. Operations of the Control panel and the IR Remote...................................................3
4.1. Operation of the Control Panel .........................................................................3
4.2. Usage of the IR Remote...................................................................................3
5. External Connection ...................................................................................................4
5.1. Introduction of the Input and Output Connectors..............................................4
5.2. How to Connect with the Input and Output Terminals.......................................5
5.3. Connection with RS232 Communication Port...................................................5
5.4. Connection with Computer ...............................................................................6
6. System Diagram.........................................................................................................6
7. EDID management of MHD44....................................................................................7
8. Communication Protocol and Command Codes.........................................................7
9. Safety Operation Guide ............................................................................................10
10.Troubleshooting & Maintenance..............................................................................11
11. After-sales Service..................................................................................................12

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
1
1. Introduction
1.1. Introduction of MHD44
MHD44 is a 4x4 HDMI matrix switcher with 4 HDBaseT outputs. It enables crosspoint
switching from any input to any output or all outputs, and supports 3D, 4K x 2K & 1080P.
It provides a nice solution for control room, conferencing room, commercial hall,
government institution etc.
1.2. Package Contents
1 x MHD44
1 x Power cord
1 x IR remote (The cell battery is not included)
4 x Plastic cushions
1 x RS232 cable
1 x User manual
2. Features
HDTV compatible with High Definition Transmission resolution up to
1920*1200@60Hz, support 1080P.
HDCP Compliant and DVI compatible, supporting DVI1.0.
Powerful EDID management.
Three ways for system controlling: RS232, IR remote and the front panel.
RS232 serial control port, easy for serial commands and third-part control.
Optional TCP/IP control (works with PTNET).
Front panel security lock to avoid unauthorized use when the matrix is installed in an
unsecured environment.
Built-in gain compensation technique and the synchronous signal correction
technology, switching speed is less than 200ns (Max).
With LEDs indicate the real-time running state.
Internal international power supply (100Volt~240Volt AC, 50/60Hz) for worldwide
compatibility.

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
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3. Specification
Video Input
Video Output
Input
4 HDMI
Output
4 HDMI
Input
Connector
Female HDMI
Output
Connector
Female HDMI
Input Level
T.M.D.S.
2.9V/3.3V
Output Level
T.M.D.S.
2.9V/3.3V
Input
Impedance
75Ω
Output
Impedance
75Ω
Video General
Gain
0 dB
Bandwidth
6.75Gbit/s
Video Signal
HDMI (or DVI-D)
Maximum Pixel
Clock
165MHz
Resolution
Range
Up to 1920 x 1200
or 1080P@60Hz
Switching
Speed
200ns (Max.)
CEC
Supports CEC wired infrared data pass-through using HDMI
1.4a standard.
EDID and
DDC
Management
Supports Extended Display Identification Data (EDID) and
Display Data Channel (DDC) data using HDMI/DVI standards,
EDID and DDC signals are actively buffered.
HDCP
Management
Compliant with HDCP using DVI and HDMI 1.4a standards.
The built-in HDCP management technology can analyze
HDCP key, and realize the handshake internally.
Audio General
Digital Audio
Supports HDMI audio transmitted through the RGB and Y, Cr,
Cb lines, actively buffered.
Control Parts
Serial Control
Port
RS232, 9-pin
female D
connector
Pin
Configurations
2 = TX, 3 = RX, 5
= GND
IR Remote
Default IR remote
Front Panel
Control
Buttons
Options
TCP/IP control by PTNET(PTN's programmable interface)
General
Power
Supply
100VAC ~
240VAC, 50/60Hz
Power
Consumption
25W
Temperature
-20 ~ +70℃
Humidity
10% ~ 90%
Case
Dimension
W483 x H44 x
D235mm (1U high,
full rack wide)
Product
Weight
2.15Kg

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
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4. Operations of the Control panel and the IR Remote
4.1. Operation of the Control Panel
①Power indicator & IR ②Input Channel ③Function Buttons ④Output Channel
F4-1 Front panel
Buttons
Function Description
INPUTS
Input buttons, ranging from "1" to "4".
OUTPUTS
Output buttons, ranging from "1" to "4".
AV
AV synchronal button: To transfer video and audio signal
synchronously by the switcher.
Example: To transfer both the video and the audio signals
from input channel No.3 to output channel No.4.
Operation: Press buttons in this order “AV”,“3”, “4””.
VIDEO
Video button: To transfer only video signals from input channel
to output channel
Example: To transfer video signals from input channel No.3 to
output channel No.4.
Operation: Press buttons in this order “VIDEO”, “3”, “4”.
AUDIO
Audio button: To transfer only audio signals from input channel
to output channel
Example: To transfer audio signals from input channel No.2 to
output channel No.3.
Operation: Press buttons in this order “AUDIO”, “2”, “3”
With the front control panel, the switcher could be control directly and rapidly by
pressing the buttons under below format.
“Menu” +“Input Channel” +“Output Channel”
1) “Menu”: “AV”, “VIDEO”, “AUDIO”
2) “Input Channel”: Fill with the number of input channel to be controlled.
3) “Output Channel”: Fill with the number of output channels to be controlled.
4.2. Usage of the IR Remote
With the infrared IR remote, the matrix switcher could be control remotely. Because
the function buttons on the IR remote are the same with the ones on the front control
panel, the IR remote shares the same control operation and command format with the
control panel.

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
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Operations of the IR remote are showed as follows.
F4-2 Panel of the IR Remote
5. External Connection
5.1. Introduction of the Input and Output Connectors
①②③④
F5-1 Rear panel
The outputs
channels, from
0~9, and plusing
“10+” for more.
The inputs
channels, from
0~9, and plusing
“10+” for more.
Menu, for
switching source
and function.

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
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Detailed description:
No.
Name
Description
①
HDMI INPUTS
HDMI-I connector.
②
HDMI OUTPUTS
HDMI-I connector.
③
RS232
The serial port, 9-pin female connector.
④
AC100V~240V
Alternating current for power supply.
5.2. 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.
F5-2 HDMI connector
Table 5-1 HDMI pin function
Number
Signal Name
Number
Signal Name
1
TMDS Data 2+
20
SHELL
2
TMDS Data 2 Shield
19
Hot Plug Detect
3
TMDS Data 2-
18
+5V Power
4
TMDS Data 1+
17
Ground
5
TMDS Data 1 Shield
16
DDC Data
6
TMDS Data 1-
15
DDC Clock
7
TMDS Data 0+
14
No Connect
8
TMDS Data 0 Shield
13
CEC
9
TMDS Data 0-
12
TMDS Clock-
10
TMDS Clock+
11
TMDS Clock Shield
5.3. Connection with RS232 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 RS232 communication port. This
RS232 communication port is a female 9-pin D connector. The definition of its pins is
as the table below.

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
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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
F5-3 9HDF
5.4. 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.
F5-4 MHD connecting to computer
6. System Diagram
In MHD switcher series, the numbers of the input/output ports are based on the
product bought by the users. For example, MHD44 has four input ports and four
output ports, numbered from one to four. According to different occasions, users can
connect it to different source signal (computer signal, AV signal etc.) devices, such as
DVD player, desktop computer, graphic workstation, digital stage etc.And connect the
output ports to a projector, a video recorder, a displayer or an amplifier. The system
diagram of MHD44 is showed as below.

HDMI Matrix Switcher 4x4
PTN Electronics Limited www.PTN-electronics.com
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F6-1 MHD44 system connection
7. EDID management of MHD44
The RS232 commands for EDID management of MHD44 include: ”EDIDMon.”
& ”EDIDMoff.”(Please notice the text-transform, and the dot in behind.)
When the command is correctly sent, all the connected displayers will be blank for
2~3 seconds and recover again. And, MHD44 will send out a RS232 feedback
command “EDIDMOn.” or “EDIDMoff.”.
When we send the “EDIDMoff.” to the MHD matrix switcher, it will recover the
factory default EDID data.
8. Communication Protocol and Command Codes
Communication protocol: RS232 Communication Protocol
Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none
Command
Types
Command
Codes
Functions
System
Command
/*Type;
Inquire the models information.
/%Lock;
Lock the keyboard of the control panel on the Matrix.
/%Unlock;
Unlock the keyboard of the control panel on the
Matrix.
/^Version;
Inquire the version of firmware
/:MessageOf
f;
Turn off the feedback command from the com port. It
will only show the “switcher OK”.