Gefen EXT-DVIKVM-441DL User manual

www.gefen.com
®
4x1 DVIKVM DL/SL
Switcher
EXT-DVIKVM-441DL
User Manual

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Technical Support Hours:
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Write To:
Gefen Inc.
c/o Customer Service
20600 Nordhoff St
Chatsworth, CA 91311
www.gefen.com
[email protected]
Notice
Gefen Inc. reserves the right to make changes in the hardware, packaging and
any accompanying documentation without prior written notice.
4x1 DVI KVM DL/SL Switcher is a trademark of Gefen Inc.
© 2009 Gefen Inc., All Rights Reserved
All trademarks are the property of their respective companies
Rev A6

CONTENTS
1 Introduction
2 Operation Notes
3 Features
4 Panel Layout
5 Panel Descriptions
6 Connecting and Operating The 4x1 DVI KVM DL/SL Switcher
7 RMT-4IR Remote Control Description
8 4x1 DVI KVM DL/SL Switcher Remote Installation
9 RMT-4IR Remote and 4x1 KVM Switcher Configuration
10 EDID Modes
12 DL (Dual Link) Only Modes
13 RS-232 Serial Control
14 RS-232 Serial Control Commands
14 EDID Management
20 Routing Commands
22 Rack Mount Installation
23 Specifications
24 Warranty

1
INTRODUCTION
Congratulations on your purchase of the 4x1 DVI-DL KVM DL/SL Switcher. Your
complete satisfaction is very important to us.
Gefen
Gefen delivers innovative, 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 implement and simple to operate.
The Gefen 4x1 DVI KVM DL/SL Switcher
The rack-mountable Gefen 4x1 dual link/single link DVI KVM DL/SL Switcher
offers an economical solution by eliminating the need to purchase many displays
for each computer in a studio or lab situation. A plug-and-play solution that
supports both Macintosh and IBM-PC computers, the 4x1 DVI KVM DL/SL
Switcher shares one DVI display with up to four computers or other DVI video
sources. A single USB 2.0 port, keyboard & mouse ports, and an analog audio
jack are also switched. The switcher saves space on your desktop by eliminating
a crowded workspace full of DVI monitors, keyboards & mice, and USB and
audio cables. Switching of DVI sources is easy and reliable.
How It Works
The DVI monitor is connected to the 4x1 DVI KVM DL/SL Switcher’s output.
Up to four DVI video/USB/Audio sources connect to the switcher’s inputs using
included high quality DVI, USB and Audio cables. The included power supply is
connected to the switcher via the locking power plug and then to a power outlet.
The currently selected DVI video signal appears on the shared monitor. DVI
Video sources (and optionally keyboards & mice, USB and audio cables) are
selected/switched using the RMT-4IR remote control, RS-232 control, or the input
selector push button on the front panel of the switcher.

2
OPERATION NOTES
READ THESE NOTES BEFORE INSTALLING OR
OPERATING THE GEFEN 4X1 DVI KVM DL/SL SWITCHER
• The 4x1 DVI KVM DL/SL Switcher will take any of up to four (4) DVI dual-
link or single-link resolution inputs and switch them, one at a time, to a DVI
output device such as a display/monitor or projector. Resolutions can be up
to 3840x2400.
• The 4x1 DVI KVM DL/SL Switcher is housed in a metal box for better RF
shielding.
• By default, the EDID of the attached display is copied to all the local inputs.
Make sure that the display is connected to the switcher before applying
power.

3
FEATURES
Features
• Switches easily between any four DVI-SL or DVI-DL sources with USB 2.0
and audio.
• Switches USB 2.0, keyboard & mouse, and analog audio
• Maintains highest resolution dual link and single link DVI
• Supports either PC or Mac USB keyboard/mouse
• Supports resolutions up through 1920x1200 and 3840x2400
• Extends the range of DVI video up to 50 feet
• Discrete IR remote control included
• Serial RS-232 remote port for switching via automated control or PC
• Supports DDWG standards for DVI monitors
• Rack ears included
Package Includes
(1) 4x1 DVI KVM DL/SL Switcher
(4) 6 ft. Dual Link DVI cables
(4) 6 ft. USB cables
(4) 6 ft. 3.5mm jack analog audio cables
(1) IR Remote Control Unit
(1) 5V DC Locking Power Connector
(1) Set of rack ears
(1) User Manual

4
Back Panel
PANEL LAYOUT
Front Panel
4 521
11 13
7 10
3
12
6 8 9

5
PANEL DESCRIPTIONS
1 External IR Port
For connection of external IR extension device such as the Gefen IR Extender
(part # EXT-RMT-EXTIR).
2 IR Receiver
Receives IR signal from the handheld Infrared remote control unit included with
the 4x1 DVI KVM DL/SL Switcher.
3 DVI Signal Status LEDs 1-4
Provide visual confirmation of the currently selected DVI input signal being
output to the DVI display device.
4 DVI Input Selector
Push-button switch cycles the next DVI input 1-4 in a forward sequence starting
again at 1.
5 Power Indicator LED
Indicates when the 4x1 DVI KVM DL/SL Switcher is receiving 5V DC power
from its included AC power supply.
6 3.5mm Analog Audio Inputs 1-4
Audio Sources 1-4 connect to the switcher here.
7 3.5mm Analog Audio Output
This audio output port connects to an external amplified audio device. The
selected audio input will be output through this port.
8 USB Type B Ports 1-4
USB devices (usually computers) one through four connect to the switcher here.
9 USB Type A Control Ports 1-2
The keyboard & mouse for controlling the selected remote computer or device
connects to the switcher here.
10 RS-232 Serial Communications Interface
Provided for external control of the 4x1 DVI KVM DL/SL Switcher.
11 5V Locking Power Receptacle
Supplies power to the 4x1 DVI KVM DL/SL Switcher from the included external
5V DC power supply. The 5V power supply has a locking power connector
which screws into this receptacle.
12 DVI Input Ports 1-4
DVI video sources 1-4 attach to the 4x1 DVI KVM DL/SL Switcher.
13 DVI Output Port
This DVI output port is connected to the display device (Monitor, Projector).

6
CONNECTINGANDOPERATINGTHE 4X1DVIKVM DL/SLSWITCHER
How to Connect the 4x1 DVI KVM DL/SL Switcher
1. Connect your computers’ DVI, USB, and Audio sources to the 4x1 DVI KVM
DL/SL Switcher inputs using user-supplied cables.
2. Connect your USB and audio devices to the USB and audio outputs using
user-supplied cables.
3. Connect your DVI display to the DVI output of the 4x1 DVI KVM DL/SL
Switcher using a user-supplied DVI cable.
4. Turn on the DVI display or projector first, then the DVI video sources/
computers.
5. Connect the 5V DC power supply to the Switcher by by screwing its 5V DC
power supply tip into the receptacle in the rear of the unit, then plug it into the
wall.
Wiring Diagram for the 4x1 DVI KVM DL/SL Switcher
EXT-DVIKVM-441DL
Computer
Computer
Computer
Computer
Switcher
Speakers
USB Keyboard
USB Mouse
Dual Link DVI Display
DUAL LINK DVI CABLE
AUDIO CABLE
USB CABLE

7
RMT-4IR REMOTE CONTROL DESCRIPTION
LED Indicator
Input
Selection
Buttons
The RMT-4IR remote control will allow the user to choose which of the 4 DVI sources
or computers will be selected. Please use the information below when selecting the
desired source:
RMT-4IR Button DVI Source
11
22
33
44

8
4X1 DVI KVM DL/SL SWITCHER REMOTE INSTALLATION
To use the RMT-4IR remote, remove the battery cover on the back of the remote
to reveal the battery compartment. Insert the included battery into the open battery
slot. The positive (+) side should be facing up. Ensure that both DIP (Dual Inline
Package) switches are in the OFF position. Replace the battery cover. The remote
ships with 2 batteries. One battery is needed for operation and the other battery is
complimentary.
IR Code Dip Switches
Empty Battery Slot

9
RMT-4IR REMOTEAND 4X1 KVM SWITCHER CONFIGURATION
How to Resolve IR Code Conflicts
In the event that IR commands from other remote controls conflict with the
supplied RMT-4IR remote control, changing the remote channel will alleviate this
issue. The RMT-4IR remote control and the 4x1 DVI KVM DL/SL Switcher both
have banks of DIP (Dual Inline Package) Switches for configuring the remote
channel that both units use to communicate. These settings must exactly match
each other for proper operation.
The DIP Switch bank on the RMT-4IR is located underneath the battery cover.
DIP Switch banks for the 4x1 DVI KVM DL/SL Switcher are located on the
underside of the unit beneath a black piece of metallic tape. One DIP switch
bank (4-switch) is for the adjustment of remote control frequencies and switch
behavior. The other DIP switch (8-switch) is reserved for DL Only mode (page
12). Switches 1 and 2 on the RMT-4IR directly correspond to DIP Switches 1 and
2 on the 4x1 DVI KVM DL/SL Switcher. Only switches 1 and 2 (of 4 in that bank)
are used for IR Code settings.
Remote Channel 1:
Default
1 2
Remote Channel 2:
1 2
Remote Channel 3:
1 2
Remote Channel 4:
1 2
Left: Picture of the opened rear battery
compartment of the RMT-4IR remote showing
the exposed DIP Switch bank between the
battery chambers.
4x1 DVI KVM DL/SL Switcher
Remote Channel 1:
Default
Remote Channel 4:
1234
1234
Remote Channel 3:
1234
Remote Channel 2:
1234

10
EDID MODES
What is EDID and what is it used for?
Under normal circumstances, an audio/video source device (digital or analog)
will require information about a connected device/display to assess what
resolutions and features (capabilities) are possible. The source device can then
tailor its output to create resolutions and/or features that are compatible with the
attached device/display. This capability information is called EDID (Extended
Display Identification Data). A source device can only accept and read one
EDID data structure/record from a connected source device/display. Likewise,
the source device can output only one video resolution to a connected device/
display.
The importance of EDID with regards to the 4x1 DVI KVM DL/SL Switcher
The 4x1 DVI KVM DL/SL Switcher handles multiple sources/inputs. Each
connected source device must correctly read one EDID data structure in order
to address its display device correctly. EDID management is carefully handled
by the 4x1 DVI KVM DL/SL Switcher to insure that EDID is recorded and
retransmitted properly, otherwise display of the input sources might not occur
correctly (or at all).
Managing EDID with the 4x1 DVI KVM DL/SL Switcher
The 4x1 DVI KVM DL/SL Switcher uses 2 modes for routing EDID. They are:
1. When the local EDID Mode is ON, (factory default setting) the Switcher
copies the EDID of the connected display to the local memory location as
they are selected. Each device must fully “boot up” before you can select
the next input. The connected device derives EDID information from the
local memory location.
2. When the local EDID Mode is OFF, each time a new source device is
selected, the Switcher connects EDID from the attached display to the
currently selected input source.
Both modes are described in greater detail on the opposite page.
NOTE: The 4x1 DVI KVM DL/SL Switcher also features an EDID Lock
Mode, allowing the EDID to be stored. See the following page for details.
How do I change EDID modes in the 4x1 DVI KVM DL/SL Switcher?
There is a bank of 4 DIP (Dual Inline Package) switches located on the main
circuit board of the Switcher underneath a small piece of silver grey tape on the
underside of the Switcher. When the sticker is removed, there will be two DIP
switch banks visible, one with 4 switches and one with 8 switches. The 8-switch
DIP switch bank is not used here (it is used for the DL (dual link) feature covered
later on page 12.)

11
EDID MODES
EDID Modes
The diagram below illustrates the 4-position DIP switch bank (containing 4 small
white toggle switches as shown). The functions of the switches are as follows:
DIP SWITCH Function
1 IR Channel
2 IR Channel
3EDID Mode
4 EDID Lock Mode
Use DIP switch 3 to set the desired EDID mode. (UP is On)
How to set the two EDID Modes:
1. Local EDID Mode ON (Switch 3 = OFF, FACTORY DEFAULT SETTING)
• During power-on, the connected display’s EDID is copied to all four local
EDID storage locations at once. EDID stored in local memory is then
passed to all input sources.
• The EDID stored in the local locations can be overwritten with another
EDID from the following locations:
• Built-in EDID memory bank (up to 7 EDID records can be stored)
• EDID collected directly from the input display upon power-up.
2. Local EDID Mode OFF (Switch 3 = ON)
• The DDC signal of the connected display is routed directly to each input
source. Each time a new source device is selected, EDID is transmitted
from the attached display to the currently selected input source. (This
mode will successfully pass HDCP signals.)
3. EDID Lock Mode (DIP Switch 4 = ON)
• Locks the last stored EDID, even if the unit is power-cycled. To store a
new EDID, do the following:
1. Power-down the Switcher and set DIP Switch 4 to the OFF position.
2. Connect the display to the DVI output port then power-on the Switcher.
3. Set DIP Switch 4 to the ON position to lock the EDID.
1234

12
DL (DUAL LINK) ONLY MODES
DL (Dual Link) Only Modes
The 8-position DIP switch bank located on the underside of the 4x1 DVI KVM DL/
SL Switcher can be used to set each individual input to work in a Dual Link Only
mode. These modes should only be enabled if issues occur when using Dual
Link sources and displays in the default mode.
DIP SWITCH Function DIP SWITCH Function
1 Input 1 Mode 5 N/A
2 Input 2 Mode 6 N/A
3 Input 3 Mode 7 N/A
4 Input 4 Mode 8 N/A
DL (Dual Link) and SL (Single Link) Mode (Switch=OFF) DEFAULT
• This setting can be set individually for each input. This mode will allow
the connection of both Dual Link and Single Link displays.
DL (Dual Link) Only Mode (Switch=ON)
• This setting can be set individually for each input. This mode should be
enabled if issues with the default occur with Dual Link displays.

13
RS-232 SERIAL CONTROL
What features are available via the RS-232 serial communications port?
The 4x1 DVI KVM DL/SL Switcher can accept commands through the RS-232
serial communications port located on the rear panel. The current RS-232 control
features are the ability to switch/route inputs to outputs without the RMT-4IR
remote control.
How do I use these features?
These features were initially intended for utilization by custom installers in
automated setups. However, these features can be tested by using any Windows
PC with a terminal emulation program such as Putty*. The next few pages will
show you how.
What pins are used for communication with the 4x1 DVI KVM DL/SL
Switcher?
Only pins 2 (Receive), 3 (Transmit), and 5 (Ground) are used for communication.
A null-modem adapter should not be used with this Switcher.
54321
9876
12345
6789
Only Pins 2 (RX), 3 (TX), and 5 (Ground) are used on the RS-232 serial interface
What are the RS-232 communications port settings?
Bits per second ............................................................................................ 19200
Data bits ............................................................................................................... 8
Parity ............................................................................................................. None
Stop bits ................................................................................................................1
Flow Control .................................................................................................. None
*Earlier versions of Microsoft Windowstm shipped with Hyperterminal.

14
RS-232 SERIAL CONTROL COMMANDS
RS-232 Features
RS-232 remote functions are used to control of this product’s features. Features
include input to output routing, EDID storage, EDID management, etc.
Functions Syntax
The syntax for each function is always the same:
#Character as the start flag →Function name →Space ( _ ) as function name
end flag →Parameter 1 →Space →Parameter n →Carriage Return ( \r ) →
Sample:
#FunctionName_param1_param2_param3_param4...\r
Syntax is NOT case sensitive.
EDID Management
Function Description
#EDIDDSTOLO Read downstream EDID and stores into all inputs
#EDIDDSTOBA Read downstream EDID and stores in EDID Bank
#EDIDBATOLO Read from EDID bank and store into all local inputs
#DDCTODS Route input DDC to downstream EDID (pass-through mode)
#DDCTOLO Routes input DDC to local EDID
#DEF Sets unit to default factory settings
#LOEDIDTOBA Load EDID from serial port and store in EDID bank
#LOEDIDTOLO Loads EDID from serial port and store in any input
#PRBAEDID Reads EDID from EDID bank and sends to serial port
#PRDSEDID Reads downstream EDID and sends it to serial port
#PRLOEDID Reads local input EDID and sends it to serial port

15
RS-232 SERIAL CONTROL COMMANDS
#EDIDDSTOLO Function
The #EDIDDSTOLO function reads the downstream EDID and stores into all lo-
cal inputs.
Syntax:
#EDIDDSTOLO
Parameters:
None
#EDIDDSTOBA Function
The #EDIDDSTOBA function reads the downstream EDID and stores it to a
specified EDID bank.
Syntax:
#EDIDDSTOBA param1
Parameters:
param1 EDID bank offset [1 - 7]
#EDIDBATOLO Function
The #EDIDBATOLO function reads an EDID from an EDID bank and stores it in
all inputs.
Syntax:
#EDIDBATOLO param1
Parameters:
param1 EDID bank offset [1 - 7]

16
RS-232 SERIAL CONTROL COMMANDS
#DDCTODS Function
The #DDCTODS function routes the input DDC to the downstream EDID (pass-
through mode).
Syntax:
#DDCTODS
Parameters:
None
#DDCTOLO Function
The #DDCTOLO function routes the input DDC to the local EDID.
Syntax:
#DDCTOLO
Parameters:
None
#DEF Function
The #DEF function set the Switcher to the factory default settings.
Syntax:
#DEF
Parameters:
None

17
RS-232 SERIAL CONTROL COMMANDS
#LOEDIDTOBA Function
The #LOEDIDTOBA function loads the specified EDID file and stores it in a
specified EDID bank.
Syntax:
#LOEDIDTOBA param1 param2 param3
Parameters:
param1 Echo mode [0 - 1]
Value Meaning
0 Semi echo mode
1 Full echo mode
param2 EDID size [1 - 2]
Value Meaning
1 128 byte EDID
2 256 byte EDID
param3 EDID bank offset [1 - 7]