Gefen GTB-MHDMI1.3-442 User manual

4x2 Matrix
for HDMI®
GTB-MHDMI1.3-442
GTB-MHDMI1.3-442-BLK
User Manual
www.gefentoolbox.com
Gefen

ASKING FOR ASSISTANCE
Rev A8
2.3g
Technical Support:
Telephone [phone]
[phone]
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Technical Support Hours:
8:00 AM to 5:00 PM Monday thru Friday, Pacific Time
Write To:
Gefen, LLC.
c/o Customer Service
20600 Nordhoff St
Chatsworth, CA 91311
www.gefentoolbox.com
[email protected]
Notice
Gefen, LLC reserves the right to make changes in the hardware, packaging and
any accompanying documentation without prior written notice.
4x2 Matrix for HDMI is a trademark of Gefen, LLC
HDMI, the logo, and High-Definition Multimedia Interface are
trademarks or registered trademarks of HDMI Licensing in the United States and
other countries.
© 2010 Gefen, LLC, All Rights Reserved
All trademarks are the property of their respective owners

CONTENTS
1 Introduction
2 Operation Notes
3 Features
4 Panel Layout
5 Panel Descriptions
6 Connecting And Operating The 4x2 Matrix for HDMI
8 IR Remote Description
10 IR Remote Installation
11 IR Remote Configuration
12 Changing the IR Channel
13 IR Extender Installation
14 EDID Management
15 What is EDID?
15 EDID Mode Selection
16 External EDID Management
17 Audio Channel Selection
18 Internal EDID Specification
19 RS-232 Serial Control Interface
20 RS-232 Serial Commands
23 Wall-Mounting Instructions
24 Specifications
25 Warranty

1
Congratulations on your purchase of the GefenToolBox 4x2 Matrix for HDMI.
Your complete satisfaction is very important to us.
About GefenToolBox
GefenToolBox is a unique product line offering portable and easy-to-install
solutions for common A/V system setups using HDMI. GefenToolBox products
are wall-mountable, small in size, and are easily transported to the field, ready
for immediate and easy installation in working environments. These products
come finished in a glossy color to blend in with either a white wall or black
cabinet. Gefen specializes in total integration for your home theater, while going
above and beyond customer expectations to ensure you get the most from your
hardware. Gefen invites you to explore our distinct GefenToolBox product line
and hopes that you find the solution that fits your needs..
The GefenToolBox 4x2 Matrix for HDMI
The 4x2 Matrix for HDMI routes up to 4 Hi Def sources to any two HDTV displays
at resolutions up to 1080p Full HD including 3D content and multi-channel digital
audio. The 4x2 Matrix for HDMI eliminates the need to disconnect and reconnect
Hi Def sources and ensures compatibility with multiple devices using powerful
EDID management. It works with any Hi Def source that needs to be connected
to an HDTV display or AV receiver supporting digital audio formats such as Dolby
TrueHD and DTS-HD Master Audio. Each source is accessible at all times by
selecting it with the included IR remote, the RS-232 port, or using the front panel
push buttons.
How It Works
Connect the Hi Def A/V sources to the 4x2 Matrix inputs using the supplied HDMI
cables. Connect up to 2 HDTV displays to the Matrix’s two HDMI outputs using
the provided cables. 3D content can be displayed when connecting a 3DTV and
3D source. Apply power to the sources and to the displays. A/V Sources may
now be freely routed to display devices by using the front panel buttons or the
included IR remote control.
INTRODUCTION

READ THESE NOTES BEFORE INSTALLING OR
OPERATING THE 4X2 MATRIX FOR HDMI
• EDID contains the A/V capabilities of a display device in regards to video
resolutions and audio formats supported. This information is used by the
source device to determine the format of the A/V signal on the outputs.
The GefenToolBox 4x2 Matrix for HDMI incorporates advanced EDID
management to ensure complete compatibility with all types of Hi Def
sources and HDTV displays. Please see pages 14-18 for more details.
OPERATION NOTES
2

HDMI 1.3 Features
• 225 MHz (up to 12 bit YUV 444 @ 1080p)
• Deep Color
• Dolby TrueHD and DTS-HD Master Audio
• Lip Sync
Features
• Displays any of four (4) Hi Def sources on the two (2) HDTV displays,
independently.
• Maintains beautiful, sharp HDTV resolutions up to 1080p and 2K.
• 3DTV Pass-Through
• EDID Management for rapid integration of sources and display devices.
• Supports digital audio formats including LPCM 7.1 audio, Dolby Digital Plus,
Dolby TrueHD, and DTS-HD Master Audio.
• Built-in IR Extender.
• IR Remote Control.
• RS-232 serial control.
• Locking HDMI connections.
• Firmware field-upgradable.
• Wall-mountable.
• This product is HDCP-compliant.
Package Includes
(1) GefenToolBox 4x2 Matrix for HDMI
(4) 6 ft. HDMI cable (M-M)
(1) IR remote control
(1) 5V DC Locking Power Supply
(1) User Manual
FEATURES
3

PANEL LAYOUT
1
11
4
8
9
10
4
6
2
3
Top
5
7
Front

PANEL DESCRIPTIONS
5
1 Locking HDMI Input Ports (4)
Connect a Hi Def source device to any of these input ports.
2 Audio Channel Selection Switch
Modifies the audio information in the EDID when using the Internal EDID mode.
See page 17 for more information.
3 EDID Mode Selection Switch
Switches between External and Internal EDID. See page 15 for more
information.
4 Source Selectors (2) and Indicator LEDs (8)
Routes the selected input to a specific display (zone). See page 7 for more
information.
5 RS-232 Serial Port
Connects to the RS-232 control device. The 4x2 Matrix for HDMI may be
switched remotely using this port. See page 20 for details.
6 Mini USB Service Port
This Mini USB service port is used for upgrading the HDMI firmware. This
feature is under development at this time.Afuture version of this manual will be
released containing a procedure for using this feature.
7 IR Extender Port (For Optional IR Extension)
Used to connect an optional IR Extender the Matrix (see page 13).
8 5V DC Power Receptacle
Connects the included 5V DC Locking Power Supply to this receptacle.
9 Power Indicator
This LED will turn bright red once the power supply has been properly
connected.
10 IR Window
Receives signals from the IR Remote Control.
11 Locking HDMI Output Ports (2)
Connect HDTV displays to these HDMI ports.

How to Connect the 4x2 Matrix for HDMI
1. Use the included HDMI cables to connect up to four (4) source devices to
the HDMI In ports on the 4x2 Matrix for HDMI.
2. Connect up to two HDTV displays with the supplied HDMI cables.
3. Connect the included 5V DC locking power supply to the power receptacle
on the Matrix. Do not overtighten the locking connector.
4. Connect the other end of the power supply to an available power outlet.
NOTE: If the source and display support 3D then the 4x2 Matrix for HDMI
will pass through the 3D signal. To pass the 3D signal, a 3DTV must be
connected to HDMI Out 1 on the Matrix.
Wiring Diagram for the GefenToolBox 4x2 Matrix for HDMI
CONNECTING AND OPERATING
THE 4X2 MATRIX FOR HDMI
6
GTB-MHDMI1.3-442
HDMI Display
HDMI Display
HDMI Switcher
HDMI CABLE
Gefen
HDMI Switc
h
e
r
HDMI Source HDMI Source
HDMI Source HDMI Source

7
CONNECTING AND OPERATING
THE 4X2 MATRIX FOR HDMI
How to Operate the 4x2 Matrix for HDMI
Use the Out 1 and Out 2 button to route the selected Hi Def source to an HDTV
display. Each number (1, 2, 3, or 4) represents an input source connected to the
Matrix.
Example 1: Routing Input (source) 2 to Output (display) 1
1. Connect an HDMI cable from the Hi Def source to Input 2 on the Matrix.
Connect an HDMI cable from Output 1 on the Matrix to the HDTV display.
2. Press the Out 1 Button until the LED 2 turns bright blue (Fig 1.1).
Fig 1.1
The display connected to Out 1 on the Matrix should now display the
content from the Hi Def source connected to Input 2 on the Matrix.
Note that in Fig 1.1, Out 2 has been routed to the source connected to HDMI In
1.
Example 2: Routing Input (source) 3 to Output (display) 2
Connect an HDTV display to HDMI Out 2 on the Matrix. Connect a Hi Def source
to HDMI In 3 on the Matrix. Press the Out 2 button until LED 3 turns bright blue.
The LED indicators should now appear as in Fig 1.2.
Fig 1.2
LED 3 should turn bright blue, indicating that the source device connected to
HDMI In 3 has been routed to the HDTV display connected to HDMI Out 2 on the
Matrix.

IR REMOTE DESCRIPTION
RMT-8MIR Remote
1 Activity Indicator
This LED will be activated momentarily each time a button is pressed.
2 Display and Source Selection Buttons
These buttons are used to select which input source is routed to the
HDTV display(s).
Routing Sources to Displays
Issuing a routing command is a simple process. There are a total of 8 buttons
on the IR remote. Each set of four (4) buttons are grouped by color for easy
navigation. The first set of four buttons (1-4) represent Output 1. The second
set of four buttons (5-8) represent Output 2. The individual buttons within a color,
represent the Inputs that are available for each Output.
8
1
2

The IR remote control will allow the user to select which source will be routed to
which output. Each of the two (2) outputs are assigned a group of four buttons
which correspond to the four source inputs. Please use the information below
when selecting the desired source for each display.
Table of IR Remote Commands
for the 4x2 Matrix for HDMI
RMT-8MIR Source Display
111
221
331
441
512
622
732
842
IR REMOTE DESCRIPTION
RMT-8MIR button Source Display
622
Example: In the above example, if button 6 on the IR remote is pressed, the
source connected to HDMI In 2 will be routed to the Display connected to HDMI
Out 2.
9

IR REMOTE INSTALLATION
Installing the IR Remote Battery
1. Remove the battery cover on the back of the remote.
2. Insert the included battery into the open battery slot. The positive (+) side of
the battery should be facing up.
3. Make sure that both DIP switches are in the OFF position.
4. Replace the battery cover.
The remote ships with 2 batteries. One battery is required for operation and the
other battery is a spare.
10
Battery Slot
DIP Switches

IR REMOTE CONFIGURATION
11
1 2 1 2
1 2
1 2
Remote Channel 3:
Remote Channel 1:
Default Remote Channel 2:
Remote Channel 4:
The IR channel selected on the RMT-8MIR Remote must match the IR channel
assigned to the 4x2 Matrix for HDMI. For example, if both DIP switches on the
remote are set to the down position (IR channel 1), the 4x2 Matrix for HDMI must
also be set to IR channel 1.
See page 12 on how to change the IR channel on the 4x2 Matrix for HDMI.
Setting the IR Remote Channel on the RMT-8MIR
In the event that IR commands from other remote controls conflict with the
supplied RMT-8MIR Remote, changing the remote IR channel will fix this issue.
The RMT-8MIR Remote has a bank of DIP switches for setting the Remote IR
channel.
The DIP Switch bank on the RMT-8MIR is located underneath the battery cover.
Left: Picture of the opened rear battery
compartment of the IR remote showing the
exposed DIP Switch bank between the battery
chambers. Above: all 4 possible combinations
of the DIP switches showing the possible
channel selections.

12
How to change the IR channel
Use the following procedure to set the proper IR channel on the 4x2 Matrix for
HDMI.
1 Press and hold the Out 1 button for 5 seconds to enter IR channel selection
mode. The bank of blue LED indicators will now display the currently
selected IR channel.
2 Press the Out 1 button to cycle through each IR channel. The currently
selected IR channel will be indicated by a flashing blue LED. IMPORTANT:
The selected IR channel must be the same as the IR channel set on the IR
Remote (page 11). Refer to the table below for setting the IR channel.
3 Once the proper IR channel has been selected, press and hold the Out 1
button to confirm and exit IR channel selection mode. The currently selected
input source will now be indicated.
IR Channel Table
Input LED IR Channel
11
22
33
44
CHANGING THE IR CHANNEL

IR EXTENDER INSTALLATION
Using the IR Extender
An optional IR Extender (Gefen Part No. EXT-RMT-EXTIR) can be used to
extend the IR capabilities of the 4x2 Matrix for HDMI. One such application
allows the Matrix to be hidden within or behind a cabinet (see illustration below).
Simply connect the IR extender to the IR extender port (see page 4).
Back of
Cabinet
Gefen Toolbox Unit
Remote
Set-top Box
13
IR Extender

What is EDID?
The 4x2 Matrix for HDMI features automatic and manual EDID management to
maximize compatibility of all attached devices. First it is necessary to understand
EDID and what it is used for.
EDID. What is it and what is it used for?
Under normal circumstances, source devices will require information about a
connected display device to assess what video resolutions and other features are
compatible with the output device. This required information is called the EDID
(Extended Display Information Data). Almost all types of output devices/displays
(computer monitor, HDTV, A/V receiver) will transmit EDID to a connected
source. The source will then read this EDID file and make the necessary
adjustments to the output signal to ensure that only compatible resolutions/
features are generated in the output signal.
Why is EDID so important with the 4x2 Matrix for HDMI?
The GefenToolBox 4x2 Matrix for HDMI uses complex technology that routes
multiple input signals to multiple outputs. The source devices will require EDID to
read. Multiple devices/displays can be connected to the input and output ports on
the Matrix, each with their own EDID. Management of EDID is key to ensure that
maximum compatibility is maintained between all devices.
What options do I have to manage the EDID in the 4x2 Matrix for HDMI?
It is important to understand that the EDID contains much more than just
listings of supported video resolutions and audio formats. However, resolutions
and audio formats are the two key types of information that a user will need to
understand how to use these EDID management functions.
Common problems that a user may encounter while using the Matrix can be:
1. Video may not be visible on all output devices/displays.
2. Audio may not be heard on all output devices/displays.
These symptoms usually arise from video resolution / audio format
incompatibilities between the devices / displays connected to the outputs.
The 4x2 Matrix for HDMI can use one of two methods to acquire and retransmit
an EDID to the A/V source device telling it about the kind of output devices that
are connected to it, thus curing the incompatibility.
EDID MANAGEMENT
14

EDID MANAGEMENT
EDID Mode Selection
1. EXTERNAL MODE:
To use this mode, set the EDID Mode Switch on the front panel to the EXT
position. In External EDID mode, the Matrix directly retrieves EDID data from
each connected A/V display device and builds a new EDID. This new EDID
is sent to the source device.
If sufficient EDID data is unavailable from external display devices or EDID-
related problems are encountered, Internal EDID Mode should be used to
provide a single compatible EDID for all connected devices.
See page 16 for additional information on how the External EDID is handled.
2. INTERNAL MODE:
To use this mode, set the EDID Mode Switch on the front panel to the INT
position. This mode will use a preset EDID that is stored in the 4x2 Matrix for
HDMI from the factory. This pre-programmed standard EDID data structure
is compatible with most A/V display devices. All resolutions and audio
formats specified in this EDID will be passed to the source device. Many
common resolutions and audio formats are supported. For a complete listing
of the resolutions and audio formats listed in this EDID please see page 18.
NOTE: All other HDMI capable devices/displays connected to the output
ports MUST be compatible with at least one resolution/audio format specified
in this EDID. It is recommended to set, on the source device, a common
resolution and audio format shared by all attached devices/displays. This is
to ensure a compatible signal is output to all connected devices / displays.
15

EXTERNAL EDID MANAGEMENT
The 4x2 Matrix for HDMI features EDID Management. Before the source can
send video or audio signals to the display, the source devices reads the EDID
(Extended Display Identification Data) of each device connected to an output.
The EDID contains information about what type of AV data that the source can
send to each display.
The 4x2 Matrix for HDMI routes multiple source signals to multiple output
devices. This involves reading EDID data from more than one device.
Management of the EDID data is important to maintain compatibility between all
devices.
Display Connections
• If a display is not connected to Output 1, then no EDID changes are made,
meaning that the previous EDID information will be used. This state will be
in effect until a display is connected to Output 1 and the Matrix is power-
cycled.
• EDID is copied from Output 1 to all other outputs. The audio block will be
copied from Output 1. EDID-copying is performed only when the Matrix is
reset or power-cycled.
3DTV Support
• 3D signals are supported if a 3DTV is connected to Output 1.
Deep Color
• Deep Color will be disabled if one of more other displays connected to the
Splitter do not support Deep Color.
16

EDID MANAGEMENT
Audio Channel Selection
The 4x2 Matrix for HDMI features a switch that will modify the supported audio
formats listed in the pre-programmed EDID. This feature is useful for limiting the
output of the source device to either 2 or multi-channel audio formats.
NOTE: This selector switch will only affect the pre-programmed EDID in the
INTERNAL (INT) EDID Mode.
The 4x2 Matrix for HDMI can use either of the following settings for audio format
support:
1. 2 Channel: This setting will limit the audio formats listed in the pre-
programmed EDID to 2 channel LPCM. For a full listing of the audio formats
in this mode please see page 18.
To use this mode, set the Audio Selection Switch on the front panel to the 2
CH position.
This mode is useful in scenarios where all output devices/displays are HDTV
monitors that only support 2 channel LPCM. This setting will ensure that all
connected devices will receive and produce sound.
2. Multi-Channel: This setting will enable all common audio formats in the pre-
programmed EDID. For a full listing of the audio formats in this mode please
see page 18.
To use this mode, set the Audio Selection Switch on the front panel to the
Multi CH position.
This mode is useful in scenarios where the output devices/displays are
varying devices (i.e. HDTV display and audio receivers). Please note that
sound may not be heard from all output devices/displays if a shared common
audio format is not used by the source device.
17