Gefen Switch 4x4 DVI Matrix User Manual

4x4 DVI  
Matrix  
USER MANUAL  
 
TABLE OF CONTENTS  
1
Introduction / Operation Notes  
2
Features  
3
Panel Layout  
4
Using the 4x4 DVI Matrix  
RMT16-IR Installation  
IR Codes  
5
6
7
Dip Switch Guidelines  
RS-232 Interface  
4x4 DVI Matrix Rack Mount Diagram  
Specifications  
8
9
10  
11  
12  
13  
14  
Terminology  
Troubleshooting  
Troubleshooting Diagram  
Warranty  
 
INTRODUCTION  
Thank you for purchasing the 4x4 DVI Matrix.  
The 4x4 DVI Matrix switches four DVI sources to any four DVI displays.  
The 4x4 DVI Matrix switcher has four DVI inputs and four DVI outputs. Matrix  
input #1 and the DVI port of DVI source #1 connects using a male to male DVI  
cable. The DVI port of DVI source #2 connects to DVI input #2. The DVI port of  
DVI source #3 connects to DVI input #3. The DVI port of DVI source #4 connects  
to DVI input #4. There are four (4) DVI outputs connecting to four (4) different  
displays.  
Note: The switching is done by using either the RMT-16-IR remote control or  
through the RS232 port. The 4x4 DVI Matrix is rack mountable.  
OPERATION NOTES  
READ THESE NOTES BEFORE INSTALLING  
OR OPERATING THE 4x4 DVI MATRIx  
• The 4x4 DVI Matrix is housed in a metal box for better RF shielding.  
The 4x4 DVI Matrix works with all DVI and HDMI displays.  
The 4x4 DVI Matrix supports VIDEO signals only.  
NOTE: The 4x4 DVI Matrix is not HDCP compliant.  
1
 
FEATURES  
Features  
• Allows any DVI display to view any source at any time  
• Allows any source to be displayed on multiple displays at the same time  
• Maintains resolutions up to 1080p, 2K, and 1920x1200  
• Maintains highest DVI single link video resolution  
• DVI or HDMI to DVI cables are used to connect the inputs and outputs of the  
matrix  
• Each display's inputs can be switched with the IR remote control or through  
RS232  
Includes:  
(1) 4x4 DVI Matrix  
(4) DVI 6ft Male to Male Cables  
(1) 5VDC Power Supply  
(1) User Manual  
(1) RMT-16IR Remote Control  
(1) Rack Ears  
2
 
PANEL LAYOUT  
3
 
USING THE 4x4 DVI MATRIx  
1 Connect all the sources to the DVI inputs on the 4x4 DVI Matrix, using the  
supplied cables.  
2 Connect the HDMI/DVI displays to the outputs on the 4x4 DVI Matrix.  
3 Connect the power supply to the 4x4 DVI Matrix  
4 Controlling the 4x4 DVI Matrix using the RMT16-IR:  
Pressing Buttons...  
Switches...  
1-4  
5-8  
Display 1 to view Source 1, 2, 3, or 4  
Display 2 to view Source 1, 2, 3, or 4  
Display 3 to view Source 1, 2, 3, or 4  
Display 4 to view Source 1, 2, 3, or 4  
9-12  
13-16  
*Note for computers connected to the DVI Matrix - When your computer  
boots up, it looks for an EDID (extended display identification data) from the  
display to tell it what monitor is connected and what resolution to output. Dur-  
ing boot up of the computer you should have ONLY one output selected to  
one input at a time so that the computer gets the EDID of the display that is  
selected. If you have multiple outputs selected to one computer, the computer  
will read the EDID of the last output selected to it. If all your displays are the  
same, or all displays are capable of running at the same resolution then this  
step does not matter.  
You can also use a DVI Detective to eliminate the need to have that matrix  
selected to the computer during bootup.  
4
 
RMT16-IR Installation  
1. Remove battery cover from the back of the RMT16-IR remote.  
2. Verify that dip switches 1 & 2 are in the down (OFF) position.  
3. Insert the battery, hold the battery so that you can see the positive side fac-  
ing up. The side that is not marked must be facing down.  
4. Test the RMT16-IR remote by pressing ONLY one button at a time. The  
indicator light on the remote will flash once each time you press a button.  
WARNING: Do not press multiple buttons simultaneously and do NOT press  
buttons rapidly. These actions will cause the remote to reset and steps 1-4 will  
have to be repeated.  
Note: The RMT16-IR ships with two batteries. One battery is required for  
operation, the second battery is complimentary.  
5
 
IR CODES  
In the event of IR conflicts, please do the following:  
1. Remove the battery cover from the back of the RMT16-IR remote.  
2. Locate the Dip Switches above the batteries  
3. Switch the Dip Switches on the RMT16-IR to any of the combinations pic-  
tured below.  
4. Dip Switches 1 and 2 in the RMT16-IR correspond with Dip Switches 1 and  
2 inside the 4x4 DVI Matrix respectively. Switch the switches inside the 4x4  
DVI Matrix to match the same Remote Channel as the RMT16-IR. The 4x4  
DVI Matrix is now set to a new IR Code.  
Remote Channel 1:  
Remote Channel 0:  
1
2
1
1
2
2
Remote Channel 3:  
Remote Channel 2:  
1
2
6
 
DIP SWITCH GUIDELINES  
Underneath the 4x4 DVI Matrix are two banks of Dip Switches. Below is a  
table describing their functions. By default, the Bank of 8 switches are set of  
to the Off position and the other bank of 4 switches are set to ON. The bank of  
4 dip switches are service switches and should not be changed from their ON  
position.  
Dip Switch#  
Name  
IR Code Dip Switch  
IR Code Dip Switch  
Unused  
Description  
1
2
3
4
5
6
7
8
Corresponds to Dip Switch 1 on RMT-16-IR  
Corresponds to Dip Switch 2 on RMT-16-IR  
Unused  
Unused  
Unused  
Unused  
Unused  
Unused  
Unused  
Unused  
Unused  
Unused  
Unused  
Remove Tape  
Front  
Bottom  
IR Switches  
7
 
RS-232 INTERFACE  
Binary Table  
ASCII Corresponding  
RMT16-IR  
Binary  
ASCII Corresponding  
Binary  
RMT16-IR  
Button  
Button  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
0011 0001  
0011 0010  
0011 0011  
0011 0100  
0011 0101  
0011 0110  
0011 0111  
0011 1000  
9
a
b
c
d
e
f
9
0011 1001  
0110 0001  
0110 0010  
0110 0011  
0110 0100  
0110 0101  
0110 0110  
0110 0111  
10  
11  
12  
13  
14  
15  
16  
g
RS232 Settings  
Bits per second ....................................................................................... 19200  
Data bits .......................................................................................................... 8  
Parity ........................................................................................................ None  
Stop bits ...........................................................................................................1  
Flow Control ............................................................................................. None  
8
 
4x4 DVI MATRIx RACK MOUNT DIAGRAM  
9
 
SPECIFICATIONS  
Video Amplifier Bandwidth .................................................................1.65 Gbps  
Input Video Signal ......................................................................... 1.2 volts p-p  
Input DDC Signal .................................................................... 5 volts p-p (TTL)  
DVI Connector..................................................DVI-I 29 pin female (digital only)  
Single Link Range .............................................................1080p / 1920 x 1200  
Remote Control Port ............................................ RS-232 Female, Mini-Stereo  
Power Consumption .................................................................. 30 watts (max)  
Power Supply ..........................................................................................5V DC  
Dimensions ............................................................. 17” W x 1.75” H x 5.875” D  
Shipping Weight ..................................................................................... 10 lbs.  
10  
 
TROUBLESHOOTING  
If there is any video noise that appears on your output displays, you can resolve them by  
using the methods described in this section.  
AUTO EQUALIZATION  
Auto equalization is set to ON by default, but in some cases you may have to manually  
equalize the incoming source signal to eliminate video noise that occurs. Since the  
equalization is used only on the incoming source signal, manual adjustment of equalization  
should only be used when the video noise is coming through on a particular incoming  
source. This is easy to test, as all displays that access this source will exhibit the same type  
of noise, while other sources will not. Typical video noise can be described as "snow" or  
brightly colored pixels that are sometimes referred to as "sparkles".  
To switch auto equalization off, look on the underside of the 4x4 Matrix and locate the 2  
banks of dip switches. They will be covered by some metallic tape that normally conceals  
their location. There is a bank of 8 dip switches with a bank of 4 dip switches right below  
it. By default, the bank of 8 dip switches will all be set in the OFF position while the bank  
of 4 dip switches, which are for auto equalization, will be set to ON. First, determine which  
display output port is exhibiting the image issue and turn OFF the corresponding auto  
equalization dip switch using the guide below. Then locate the corresponding equalization  
trim pot (Located on the diagram on the next page) on the underside of the 4x4 Matrix and  
turn it in small increments in either a clockwise or counter-clockwise motion until the image  
clears and no longer exhibits any noise.  
PRE-EMPHASIS  
If your input source signals are displaying fine, whether it is using auto or manual  
equalization, but you're experiencing issues with particular displays, your cable run may be  
too long and a pre-emphasis can be added to account for the distance that the signal will  
have to travel. To do this, first determine which display output port is exhibiting this issue,  
and using the dip switch guideline below, turn on pre-emphasis for that particular port.  
Using both of these techniques, individually or in conjunction, will help you tune in your  
signal to get the best possible image quality out of your Gefen 4x4 DVI KVM Matrix.  
8 Dip Switch Bank (Pre-emphasis)  
Dip Switch #  
Name  
Description  
Corresponds to Dip Switch 1 on RMT16-IR  
Corresponds to Dip Switch 2 on RMT16-IR  
Unused  
1
2
3
4
5
6
7
8
IR Code Dip Switch  
IR Code Dip Switch  
Unused  
Unused  
Unused  
Output 4 pre-emphasis  
Output 3 pre-emphasis  
Output 2 pre-emphasis  
Output 1 pre-emphasis  
Output 4 pre-emphasis  
Output 3 pre-emphasis  
Output 2 pre-emphasis  
Output 1 pre-emphasis  
4 Dip Switch Bank (Auto-Equalization)  
Dip Switch #  
Name  
Description  
1
2
3
4
Auto EQ for Display 1  
Auto EQ for Display 2  
Auto EQ for Display 3  
Auto EQ for Display 4  
Auto/Manual Equalization for display 1  
Auto/Manual Equalization for display 2  
Auto/Manual Equalization for display 3  
Auto/Manual Equalization for display 4  
12  
 
TROUBLESHOOTING - DIAGRAM  
Remove Tape  
Front  
Bottom  
Pre-Emphasis  
Switches  
Auto Equalization  
Switches  
13  
 

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