Gefen Switch EXT DVI 441DL User Manual

®
4x1 DVI DL Switcher  
EXT-DVI-441DL  
User Manual  
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CONTENTS  
1
Introduction  
2
Operation Notes  
Features  
3
4
Panel Layout  
Panel Descriptions  
5
6
Connecting and Operating The 4x1 DVI DL Switcher  
RMT-4IR Remote Control Description  
4x1 DVI DL Switcher Remote Installation  
4x1 Remote and Switcher Conguration  
EDID Modes  
7
8
9
10  
12  
13  
14  
14  
20  
22  
23  
24  
DL (Dual Link) Only Modes  
RS-232 Serial Control  
RS-232 Serial Control Commands  
EDID Management  
Routing Commands  
Rack Mount Installation  
Specications  
Warranty  
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INTRODUCTION  
Congratulations on your purchase of the 4x1 DVI DL 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 DL Switcher  
The rack-mountable Gefen 4x1 DVI DL Switcher offers an economical solution by  
eliminating the need to purchase many displays for each DVI source in a studio  
or lab situation. A plug-and-play solution, the 4x1 DVI DL Switcher shares one  
dual-link display with up to four computers or other DVI video sources, saving  
space on your desktop. The source computer is selected using the included IR  
remote control or through RS-232 control.  
How It Works  
The DVI monitor is connected to the switcher’s output. Up to four DVI sources  
connect to the switcher’s DVI inputs using included high quality DVI cables.  
The included power supply is connected to the switcher via the locking power  
plug and then to a power outlet. The currently selected computer’s video signal  
appears on the shared monitor. Video sources 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.  
1
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OPERATION NOTES  
READ THESE NOTES BEFORE INSTALLING OR  
OPERATING THE GEFEN 4X1 DVI DL SWITCHER  
The 4x1 DVI DL 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 DL 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.  
2
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FEATURES  
Features  
Switches easily between any four DVI-SL or DVI DL sources  
Maintains highest resolution dual link DVI  
Supports resolutions up through 3840x2400  
EDID Storage and programming for best source/display compatibility  
Extends the range of the video signal on the DVI outputs up to 50 feet  
Discrete IR remote control included  
Serial RS-232 port for switching input sources via automated control or PC  
Supports DDWG standards for DVI monitors  
Rack ears included  
Package Includes  
(1) 4x1 DVI DL Switcher  
(4) 6-ft Dual Link DVI cables (M-M)  
(1) 5V DC Power Supply  
(1) User’s Manual  
(1) IR remote control  
(1) Set of Rack Ears  
3
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PANEL LAYOUT  
Front Panel  
4
5
1
2
3
Back Panel  
9
8
6
7
4
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PANEL DESCRIPTIONS  
1
2
3
4
5
6
External IR Port  
For connection of external IR extension device such as the Gefen IR Extender  
(part # EXT-RMT-EXTIR).  
IR Receiver  
Receives IR signal from the handheld Infrared remote control unit included with  
the product.  
DVI Signal Status LEDs 1-4  
Provide visual conrmation of the currently selected DVI input signal out of the  
four DVI input ports.  
DVI Input Selector  
Push-button switch cycles the next DVI input 1-4 in a forward sequence starting  
again at 1.  
Power Indicator LED  
Indicates when the 4x1 DVI DL Switcher is receiving 5V DC power from its  
included AC power supply.  
5V Locking Power Receptacle  
Supplies power to the 4x1 DVI DL Switcher from the included external 5V DC  
power supply. The 5V power supply has a locking power tip which screws into  
this receptacle.  
7
8
9
DVI Input Ports 1-4  
DVI video sources one through four attach to the 4x1 DVI DL Switcher.  
DVI Output Port  
This DVI output port is connected to the display device (Monitor, Projector).  
RS-232 Serial Communications Interface  
Provided for external control of the 4x1 DVI DL Switcher.  
5
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CONNECTING AND OPERATING THE 4X1 DVI DL SWITCHER  
How to Connect the 4x1 DVI DL Switcher to your devices:  
1. Connect user supplied DVI cables from the DVI sources into the 4x1 DVI  
Switcher’s Inputs.  
2. Connect the cable from your display (monitor or projector) into the DVI Out  
of the 4x1 DVI DL Switcher.  
3. Connect the 5V power supply, then plug it into the wall. Turn on the DVI  
display or projector rst, then the video sources (computers). Turn on  
the 4x1 DVI DL Switcher by screwing its 5V DC power supply tip into the  
receptacle in the rear of the chassis.  
Note: The Switcher retrieves device resolution and video timing capability  
information called EDID from the display and feeds it to all connected input  
sources. This mode of operation is called LOCAL EDID mode. It allows  
a much faster setup time and improved operational stability since input  
sources do not need to individually collect and store EDID on their own.  
If some sources do not display correctly, you can individually congure each  
input source and/or program custom EDIDs (such as standard compatible  
resolutions) into the Switcher, or alternately set each input source to directly  
read EDID from the display device (with the Local EDID Mode turned OFF).  
These procedures are covered in detail on pages 10-11 along with EDID  
concepts in general.  
Wiring Diagram for the 4x1 DVI DL Switcher  
DUAL LINK DVI CABLE  
Computer  
Computer  
Computer  
Switcher  
Computer  
Dual Link DVI Display  
EXT-DVI-441DL  
6
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4X1 DVI DL SWITCHER REMOTE DESCRIPTION  
LED Indicator  
Input Selection  
Buttons  
The RMT-4IR remote control will allow the user to select which of 4 DVI sources will  
be displayed. Please use the information below when selecting the desired source  
for output to a display or other DVI video receiving device.  
RMT-4IR Button  
DVI Source  
1
2
3
4
1
2
3
4
7
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4X1 DVI DL 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.  
Empty Battery Slot  
IR Code Dip Switches  
8
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4X1 REMOTE CONTROL AND SWITCHER CONFIGURATION  
How to Resolve IR Code Conicts  
In the event that IR commands from other remote controls conict with the  
supplied RMT-4IR remote control, changing the remote control channel will  
alleviate this issue. The RMT-4IR remote control and the 4x1 DVI DL Switcher  
both have banks of DIP (Dual Inline Package) Switches for conguring the  
remote channel that the 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 DL 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 Gefen use only. DIP Switches 1 and 2  
on the RMT-4IR directly correspond to DIP Switches 1 and 2 on the 4x1 DVI DL  
Switcher. Only switches 1 and 2 (of 4 in that bank) are used for IR Code settings.  
Remote Channel 1:  
Default  
Remote Channel 2:  
Remote Channel 4:  
1
1
2
2
1
1
2
2
Remote Channel 3:  
Left: Picture of the opened rear battery  
compartment of the RMT4-IR remote showing  
the exposed DIP Switch bank between the  
battery chambers.  
4x1 DVI DL Switcher  
Remote Channel 1:  
Default  
Remote Channel 2:  
1
1
3
3
2
2
4
4
1
1
3
3
2
2
4
Remote Channel 3:  
Remote Channel 4:  
4
9
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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  
Identication 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 DL Switcher  
The 4x1 DVI 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  
DL 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 DL Switcher  
The 4x1 DVI DL 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 DL 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 DL 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.)  
10  
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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  
IR Channel  
1
2
3
4
IR Channel  
EDID Mode  
1
3
2
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.  
11  
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DL (DUAL LINK) ONLY MODES  
DL (Dual Link) Only Modes  
The 8-position DIP switch bank located on the underside of the 4x1 DVI DL  
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  
N/A  
1
2
3
4
Input 1 Mode  
Input 2 Mode  
Input 3 Mode  
Input 4 Mode  
5
6
7
8
N/A  
N/A  
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.  
12  
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RS-232 SERIAL CONTROL INTERFACE  
What features are available via the RS-232 serial communications port?  
The 4x1 DVI DL 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. The next few pages will show you how.  
What pins are used for communication with the 4x1 DVI DL 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.  
5 4 3 2 1  
1 2 3 4 5  
9 8 7 6  
6 7 8 9  
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  
13  
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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 ag Function name Space ( _ ) as function name  
end ag 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  
#DDCTOLO  
#DEF  
Route input DDC to downstream EDID (pass-through mode)  
Routes input DDC to local EDID  
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  
#PRDSEDID  
#PRLOEDID  
Reads EDID from EDID bank and sends to serial port  
Reads downstream EDID and sends it to serial port  
Reads local input EDID and sends it to serial port  
14  
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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  
specied 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]  
15  
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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  
16  
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RS-232 SERIAL CONTROL COMMANDS  
#LOEDIDTOBA Function  
The #LOEDIDTOBA function loads the specied EDID le and stores it in a  
specied EDID bank.  
Syntax:  
#LOEDIDTOBA param1 param2 param3  
Parameters:  
param1  
Echo mode  
[0 - 1]  
Value  
Meaning  
0
1
Semi echo mode  
Full echo mode  
param2  
param3  
EDID size  
[1 - 2]  
Value  
Meaning  
1
2
128 byte EDID  
256 byte EDID  
EDID bank offset  
[1 - 7]  
17  
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RS-232 SERIAL CONTROL COMMANDS  
#LOEDIDTOLO Function  
The #LOEDIDTOLO function loads the specied EDID le to a specied local  
input.  
Syntax:  
#LOEDIDTOLO param1 param2  
Parameters:  
param1  
param2  
Echo mode  
[0 - 1]  
Value  
Meaning  
0
1
Semi echo mode  
Full echo mode  
EDID size  
[1 - 2]  
Value  
Meaning  
1
2
128 byte EDID  
256 byte EDID  
#PRBAEDID Function  
The #PRBAEDID function reads the EDID le from the specied bank and sends  
it to the serial port.  
Syntax:  
#PRBAEDID param1 param2  
Parameters:  
param1  
param2  
EDID bank offset  
File type  
[1 - 7]  
[0 - 1]  
Value  
Meaning  
.BIN le  
.TXT le  
0
1
18  
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RS-232 SERIAL CONTROL COMMANDS  
#PRDSEDID Function  
The #PRDSEDID function reads the downstream EDID and sends it to the serial  
port.  
Syntax:  
#PRDSEDID param1  
Parameters:  
param1  
File type  
[0 - 1]  
Value  
Meaning  
.BIN le  
.TXT le  
0
1
#PRLOEDID Function  
The #PRLOEDID function reads the local EDID and spools it to the serial port.  
Syntax:  
#PRLOEDID param1  
Parameters:  
param1  
File type  
[0 - 1]  
Value  
Meaning  
.BIN le  
.TXT le  
0
1
19  
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RS-232 SERIAL CONTROL COMMANDS  
Commands  
Simplied syntax was used for command implementation for faster operation with  
the device: # character – isn’t needed, the command name is reduced to 1 letter.  
The commands are not case-sensitive.  
Command  
Description  
P
1
2
3
4
Displays the function menu  
Switch to Input 1  
Switch to Input 2  
Switch to Input 3  
Switch to Input 4  
The ASCII character table below indicates which Switcher input will be routed to  
the output Display when the corresponding ASCII (numeric) character is typed.  
ASCII  
Input  
Binary  
1
2
3
4
1
2
3
4
0011 0001  
0011 0010  
0011 0011  
0011 0100  
20  
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RS-232 SERIAL CONTROL COMMANDS  
2. USING SHORT-CUT CHARACTERS TO CHANGE SETTINGS  
2.1 HYPERTERMINALtm SETTINGS in Microsoft Windowstm  
First, please setup correct communications by performing these commands (as  
shown on the screen shot immediately below):  
File->Properties->Setting->ASCII Setup  
Also, please be sure to unmark the check box that says “Send line ends with line  
feeds.”  
2.2 EXAMPLE -- CHANGE THE ROUTED SOURCE  
Now you are ready to route Display input sources.  
At the Hyperterminal cursor prompt, type the numeral key of the input to switch  
to, followed by the ENTER key.  
Wait until you see the message “Function Done” on the Display. At this point the  
Display should show the correct Source corresponding to the numeral that was  
typed.  
21  
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RACK MOUNT INSTALLATION  
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.  
1
Front of unit  
Rear of unit  
2
3
4
22  
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SPECIFICATIONS  
Video Amplier Bandwidth:..................................................................2 x 165 MHz  
Input Video Signal:...............................................................................1.2 Volts p-p  
Input DDC Signal:..........................................................................5 Volts p-p (TTL)  
Single Link Max. Resolution:................................................................1920 x 1200  
Dual Link Max. Resolution:.................................................................. 3840 x 2400  
DVI Connector:.................................................... DVI-I 29-pin female (digital only)  
Power Supply:...............................................................................................5V DC  
Power Consumption:.............................................5 Watts (min.) / 25 Watts (max.)  
Dimensions:.....................................................................17.1” W x 1.8” H x 4.4” D  
Rackmountable:..............................................................................1U Rack Space  
Shipping Weight:...........................................................................................12 lbs.  
23  
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WARRANTY  
Gefen warrants the equipment it manufactures to be free from defects in material  
and workmanship.  
If equipment fails because of such defects and Gefen is notied within two (2)  
years from the date of shipment, Gefen will, at its option, repair or replace the  
equipment, provided that the equipment has not been subjected to mechanical,  
electrical, or other abuse or modications. Equipment that fails under conditions  
other than those covered will be repaired at the current price of parts and labor in  
effect at the time of repair. Such repairs are warranted for ninety (90) days from  
the day of reshipment to the Buyer.  
This warranty is in lieu of all other warranties expressed or implied, including  
without limitation, any implied warranty or merchantability or tness for any  
particular purpose, all of which are expressly disclaimed.  
1. Proof of sale may be required in order to claim warranty.  
2. Customers outside the US are responsible for shipping charges to and from  
Gefen.  
3. Copper cables are limited to a 30 day warranty and cables must be in their  
original condition.  
The information in this manual has been carefully checked and is believed to  
be accurate. However, Gefen assumes no responsibility for any inaccuracies  
that may be contained in this manual. In no event will Gefen be liable for  
direct, indirect, special, incidental, or consequential damages resulting from  
any defect or omission in this manual, even if advised of the possibility of such  
damages. The technical information contained herein regarding the features and  
specications is subject to change without notice.  
For the latest warranty coverage information, refer to the Warranty and Return  
PRODUCT REGISTRATION  
Please register your product online by visiting the Register Product page  
under the Support section of the Gefen Web site.  
24  
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NOTES  
25  
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NOTES  
26  
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NOTES  
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Rev A10  
20600 Nordhoff St., Chatsworth CA 91311  
1-800-545-6900 818-772-9100 fax: 818-772-9120  
Pb  
This product uses UL listed power supplies.  
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