Gefen EXT-DVI-144DL User manual

®
1:4 DVI Dual Link
Splitter
EXT-DVI-144DL
User Manual
www.gefen.com

Technical Support:
Telephone [phone]
[phone]
Fax [phone]
Technical Support Hours:
8:00 AM to 5:00 PM Monday thru Friday.
Write To:
Gefen, LLC
c/o Customer Service
20600 Nordhoff St
Chatsworth, CA 91311
www.gefen.com
[email protected]
Notice
Gefen, LLC reserves the right to make changes in the hardware, packaging, and
any accompanying documentation without prior written notice.
1:4 DVI Dual Link Splitter is a trademark of Gefen LLC
© 2011 Gefen, LLC. All rights reserved.
All trademarks are the property of their respective owners.
ASKING FOR ASSISTANCE
Rev A2

CONTENTS
1 Introduction
2 Operation Notes
3 Features
4 Front Panel Layout
5 Front Panel Descriptions
6 Back Panel Layout
7 Back Panel Descriptions
8 Connecting the 1:4 DVI Dual Link Splitter
8 Wiring Diagram
9 RS-232 Control
10 RS-232 Commands
12 EDID Management
13 Masking Commands
14 System Commands
16 Firmware Update
17 Rack Ear Installation
18 Specifications
19 Warranty

1
INTRODUCTION
Congratulations on your purchase of the 1:4 DVI Dual Link Splitter. Your
complete satisfaction is very important to us.
Gefen
Gefen delivers innovative and progressive computer and electronics
add-on solutions that harness integration, extension, distribution, and conversion
technologies. Gefen’s reliable plug-and-play products supplement cross-platform
computer systems, professional audio/video environments, and HDTV systems
of all sizes with hard-working solutions that are easy to install and simple to
operate.
The Gefen 1:4 DVI Dual Link Splitter
The 1:4 DVI Dual Link Splitter distributes a single dual link DVI source on up to
four DVI dual link outputs at the same time, without losing quality or resolution.
It works with any dual link DVI supporting resolutions up to 2560 x 1600. The
Splitter supports EDID management, output masking, and standby mode using
RS-232. In standby mode, the Splitter uses less than 1 Watt of power, even when
all DVI devices are still active.
How It Works
Connect the DVI dual link source to the DVI IN port on the 1:4 DVI Dual Link
Splitter, using the included 6 ft. DVI dual link cable. Connect up to four dual link
DVI devices to the four DVI outputs on the Splitter. Connect the provided
locking power supply to the Splitter and the AC power cord to an available
electrical outlet.

READ THESE NOTES BEFORE INSTALLING OR
OPERATING THE 1:4 DVI DUAL LINK SPLITTER
• HDCP content is not supported.
OPERATION NOTES
2

3
FEATURES
Features
• Distributes one dual link source to four DVI dual link outputs
• Supports up to 1080p, 2K, and 2560 x 1600 resolutions
• EDID Management for rapid integration of source and displays
• Output masking
• RS-232 for firmware, masking, and EDID management
• Standby mode
• Rack-mountable
Package Includes
(1) 1:4 DVI Dual Link Splitter
(1) 6ft. DB9 Cable (M-F)
(1) 6ft. Dual Link DVI cable (M - M)
(1) 5V / 4A DC Locking Power Supply (EXT-PS54AULP)
(1) Set of Rack Ears
(1) Manual

4
FRONT PANEL LAYOUT
Front Panel
1

5
FRONT PANEL DESCRIPTIONS
1 Power
This LED indicator will glow bright red when the unit is powered.

6
BACK PANEL LAYOUT
Back Panel
4
2 31

7
BACK PANEL DESCRIPTIONS
1 5V DC
Connect the included 5V DC locking power supply to this receptacle.
2 DVI In
Connect a dual link computer source to the DVI In connector.
3 RS-232 Serial Port
This port is used for serial communication using an RS-232 control device. For
details, refer to page 9
4 Out (1 - 4)
Connect up to four (4) dual link DVI displays to each of the DVI Out
connectors.

CONNECTING THE 1:4 DVI DUAL LINK SPLITTER
8
How to Connect the 1:4 DVI Dual Link Splitter
1 Connect the included dual link DVI cable between the DVI source and the
DVI In connector on the Splitter.
2 Connect up to four (4) dual link DVI displays to each of the DVI Out
connectors on the Splitter.
3 OPTIONAL: To use the RS-232 communication feature, connect an
RS-232 cable between the Splitter and the RS-232 host controller.
4 Connect the included 5V locking power supply to the power receptacle
on the 1:4 DVI Dual Link Splitter then connect the AC power cord to an
available electrical outlet.
Wiring Diagram for the 1:4 DVI Dual Link Splitter
EXT-DVI-144DL
Dual-Link
DVI Source Dual-Link DVI Splitter
Dual-Link
DVI Display
Dual-Link
DVI Display
Dual-Link
DVI Display
Dual-Link
DVI Display
DVI CABLE
nk
rc
e
D
u
RS-232 Controller
RS-232 CABLE
ATTENTION: This product should always be connected to a grounded
electrical socket.

RS-232 CONTROL
9
Only pins 2 (Receive), 3 (Transmit), and 5 (Ground) are used for communication.
54321
9876
12345
6789
Only Pins 2 (RX), 3 (TX), and 5 (Ground) are used on the RS-232 serial interface
Default Serial Port Settings
Bits per second ............................................................................................ 19200
Data bits ............................................................................................................... 8
Parity ............................................................................................................. None
Stop bits ................................................................................................................1
Flow Control .................................................................................................. None
NOTE: Only pins 2 (Receive), 3 (Transmit), and 5 (Ground) are used
for communication. A null-modem adapter should not be used with this
product.
IMPORTANT: When sending RS-232 commands, a carriage return and
a line feed character must be included at the end of each line.

10
RS-232 COMMANDS
Command Syntax
Each command uses the following syntax:
#Command_Name [Space] Parameter 1 [Space] Parameter n [CR]
Sample:
#FunctionName_param1_param2_param3_param4...\r
Syntax is NOT case sensitive.
EDID Management
Command Description
#EDIDDETOLO Stores the default EDID into all inputs
#EDIDDSTOLO Read downstream EDID and stores into all inputs
#LOEDIDTOLO Loads EDID from serial port and store in any input
#PRDSEDID Reads downstream EDID and sends it to serial port
#PRLOEDID Reads local input EDID and sends it to serial port
#EDIDDETOLO Command
The #EDIDDETOLO command stores the default EDID into the inputs.
Syntax:
#ediddetolo
Parameters:
None

11
RS-232 COMMANDS
#EDIDDSTOLO Command
The #EDIDDSTOLO command reads the downstream EDID and stores into all
local inputs.
Syntax:
#ediddstolo
Parameters:
None
#LOEDIDTOLO Function
The #LOEDIDTOLO function loads the specified EDID file to a specified local
input.
Syntax:
#LOEDIDTOLO param1
Parameters:
param1 EDID size [1 - 2]
Value Meaning
1 128 byte EDID
2 256 byte EDID
Instructions:
1. Launch Windows® HyperTerminal (or any terminal emulation program).
2. Click Transfer > Send Text File...
3. Browse and select the correct EDID file.
4. Click the Open button.
Notes:
There is a 15 second timeout period if the local EDID file is not uploaded to the
Splitter.

12
RS-232 COMMANDS
#PRDSEDID Function
The #PRDSEDID command reads the downstream EDID and spools it to the
serial port.
Syntax:
#PRDSEDID param1
Parameters:
param1 Monitor [1 - 4]
#PRLOEDID Function
The #PRLOEDID command reads the local EDID and spools it to the serial port.
Syntax:
#PRLOEDID
Parameters:
None

13
RS-232 COMMANDS
Masking Commands
Command Description
#MASKOUT Masks the specified output
#UNMASKOUT Unmasks the specified output
#MASKOUT Command
The #MASKOUT command masks specific outputs preventing video from being
displayed.
Syntax:
#maskout param1
Parameters:
param1 Output [1 - 4]
Notes:
Set param1 to 0 to mask all outputs.
#UNMASKOUT Command
The #UNMASKOUT command unmasks specific outputs.
Syntax:
#unmaskout param1
Parameters:
param1 Output [1 - 4]
Notes:
Set param1 to 0 to unmask all outputs.

14
RS-232 COMMANDS
System Commands
Command Description
#ACTIVEBOLO Activates the boot loader
#FOOFF Disables the +5V of the DVI input channel
#FOON Enables the +5V of the DVI input channel
#STANDBY Enables Standby Mode
#WAKEUP Disables Standby Mode
#ACTIVEBOLO Command
The #ACTIVEBOLO command activates the boot loader. See page 16 for more
information.
Syntax:
#activebolo
Parameters:
None
Notes:
This command must be executed twice.
#FOOFF Command
The #FOOFF command disables the +5V of the DVI input channel.
Syntax:
#fooff
Parameters:
None

15
RS-232 COMMANDS
#FOON Command
The #FOON command enables the +5V of the DVI input channel.
Syntax:
#foon
Parameters:
None
#STANDBY Command
The #STANDBY command enables Standby Mode. In Standby Mode, the
Splitter will only consume a maximum of 0.5 Watts.
Syntax:
#standby
Parameters:
None
#WAKEUP Command
The #WAKEUP command disables Standby Mode.
Syntax:
#foon
Parameters:
None

16
FIRMWARE UPDATE
Firmware Update Procedure
Any terminal emulation program can be used to perform the upgrade
process. The instructions below is outlined for Windows® HyperTerminal.
1. Connect an RS-232 cable between the Splitter and the computer running the
terminal program. Verify the correct serial port settings (see page 9).
2. Type the #activebolo command then press the [ENTER] key.
Repeat Step 2.
The following will be displayed on the screen:
================== Main Menu ========================
Download new program -------- 1
Cancel ---------------------- 2
=====================================================
4. Press [1] on the computer keyboard to begin downloading program to the
htemporary memory.
5. The following message will be displayed:
Waiting for the file to be sent ... (press ‘a’ to abort)
6. In Hyperterminal, click Transfer > Send File...
7. Click Browse... and select the .bin file to be uploaded (e.g. 1x4splitter.bin).
8. Select the Ymodem protocol.
9. Click Send on the Send File dialog box.
10. After a few moments, a message will appear in Hyperterminal:
Programming Completed Successfully!

17
Installing the Rack Ears
Rack mount ears are provided for installation of this unit into a 1U rack mount
space.
1. Locate the side screws on the unit.
2. Remove the front 2 screws that are located closest to the front of the unit.
3. Using the removed screws, screw the rack mounting bracket into the unit.
4. Repeat the procedure on the opposite side of the unit.
RACK EAR INSTALLATION
Rear of unit
Front of unit