Gefen HDMI-248 User manual

2:8 dDistribution
Amplifier
Model # EXT-HDMI-248
USER MANUAL
www.gefen.com

Technical Support:
Telephone [phone]
[phone]
Fax [phone]
Technical Support Hours:
8:00 AM to 5:00 PM Monday through Friday.
Write To:
Gefen Inc.
c/o Customer Service
20600 Nordhoff Street
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.
2:8 HDMI Distribution Amplifier is a trademark of Gefen Inc.
© 2008 Gefen Inc., All Rights Reserved
ASKING FOR ASSISTANCE

TABLE OF CONTENTS
Introduction / Operation Notes1
Features2
Panel Descriptions3
Connecting and Operating the 2:8 HDMI Distribution Amplifier4
RMT-2 Installation5
IR Code Configuration6
RJ-11 To Serial Control Interface7
Dip Switch Guidelines8
Rack Ears Installation Diagram9
Wiring Diagram10
Specifications11
Warranty12

The Gefen 2:8 HDMI Distribution Amplifier is the perfect solution for anyone who
needs to send one or two sources of digital high definition video to multiple displays
at the same time. It supports HDMI equipment, such as DVD players, satellite set
top boxes, and HDMI displays. In operation, the digital source is connected to the
distribution amplifier’s input while eight HDMI outputs are available to be used
in part or in full. Once the unit is connected and powered, your source can be
distributed up to eight digital displays at the same time.
How It Works
Simply connect your HDMI video source to the 2:8 Distribution Amplifier’s input
using the supplied HDMI cable. Then connect up to eight HDMI displays to the unit’s
eight HDMI outputs. Once connected and powered, your source will be seen on all
eight displays at the same time. When two or more 2:8’s are connected together,
you can create a larger distribution system.
INTRODUCTION
1
READ THESE NOTES BEFORE INSTALLING OR
OPERATING THE 2:8 HDMI DISTRIBUTION AMPLIFIER
The 2:8 HDMI Distribution Amplifier can only mirror one input video signal at a• time to all eight display outputs. The user can choose which of the two HDMI
inputs will be displayed on all eight HDMI outputs.
HDMI/HDCP compliant•
Compatible with all HDMI and DVI* displays•
NOTE: *When used with a DVI to HDMI adapter
OPERATION NOTES

FEATURES
Features
Switch easily between any two HDMI/DVI sources•
Outputs are mirrored to eight HDMI/DVI* displays simultaneously•
Supports resolutions up to 1080p, 2K and 1920 x 1200•
Extends the range of HDMI compliant devices by equalizing and re-clocking the• HDMI signal
HDMI/HDCP compliant•
Includes:
(1) 2:8 HDMI Distribution Amplifier
(1) 6’ HDMI cable (M-M)
(1) 24V DC Power Supply
(1) RMT2-IR remote
(1) Set of Rack Ears
(1) Users Manual
2

PANEL DESCRIPTIONS
3
Front Panel
Back Panel
3
Ba
ck
Panel
Power LED
Indicator
Input LED
Indicator RJ-11 To
RS-232
Serial Port
IR Extension
Port
IR Eye
24V DC Power
Input
HDMI Output
8
HDMI Output
6
HDMI Output
4
HDMI Output
8
HDMI
Input 1 HDMI
Input2 HDMI Output
7
HDMI Output
5
HDMI Output
3
HDMI Output
1*
Fr
on
t
Pa
ne
l

CONNECTING THE 2:8 HDMI DISTRIBUTION AMPLIFIER
OPERATING THE 2:8 HDMI DISTRIBUTION AMPLIFIER
4
Connect the supplied cable from the HDMI source into the HDMI input port1. 1 of the
2:8 HDMI DistributionAmplifier.
Connect a second HDMI source to HDMI input port 2 on the 2:8 HDMI Distribution2. Amplifier using a user supplied HDMI cable.
Connect the display(s) (up to eight) to the HDMI output port(s) of the 2:8 HDMI3. Distribution Amplifier using user supplied cable(s)
Plug the 24V DC power supply into the 2:8 HDMI Distribution Amplifier.4.
Switching between the inputs on the 2:8 HDMI DistributionAmplifier is done using either
the supplied RMT2-IR remote or the RJ11 to serial interface.
IR Remote
Pressing button one on the remote will select the HDMI source that is connected to
HDMI input port one. Pressing two on the remote will select the HDMI source that is
connected to HDMI input port two.
RJ11 To Serial Control Interface
Please see the diagram on page 7 for the RJ11 serial control interface pin configuration.
How to Connect the 2:8 HDMI Distribution Amplifier

5
RMT2-IR INSTALLATION
1. Remove battery cover from the back of the RMT2-IR remote.
2. Verify that dip switches 1 & 2 are in the down (OFF) position. (See page 6)
3. Insert the battery, hold the battery so that you can see the positive side facing up.
The side that is not marked must be facing down.
4. Test the RMT2-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 RMT2-IR ships with two batteries. One battery is required for operation,
the second battery is complimentary.
The optional IR extender allows you to
relocate your HDMI Switcher and still retain IR
control. Gefen part# EXT-RMT-EXTIR

6
IR CODE CONFIGURATION
2:8 HDMI Distribution Amplifier
Remote Channel 1:
Default
Remote Channel 4:
Remote
Remote Channel 1:
Default
1 2
Remote Channel 2:
1 2
Remote Channel 3:
1 2
Remote Channel 4:
1 2
How to Resolve IR Code Conflicts
In the event that IR commands from other remote controls conflict with the supplied RMT-2IR
remote control, changing the remote channel will alleviate this issue. The RMT-2IR remote control
and the 2:8 HDMI Distribution Amplifier have Dip Switches for configuring the remote channel that
both units use to communicate. These settings must match each other for proper operation. The 2
Dip Switch bank on the RMT-2IR is located underneath the battery cover. The 8 Dip Switch bank
for the 2:8 HDMI Distribution Amplifier is located inside of the unit. *Dip Switch 1 and 2 on the
RMT-2IR correspond to Dip Switch 3 and 4 on the 2:8 HDMI Distribution Amplifier.
NOTE: *Dip Switches 1, 2, and 5 through 8 are not used on the 2:8 HDMI Distribution Amplifier.
Because the procedure for changing channels requires the main unit to be disassembled, this
procedure should only be done if there are IR conflicts present in your setup.
Disconnect power from unit before starting. Remove all cabling from unit.
To open the 2:8 HDMI DistributionAmplifier Unit, remove all screws from the sides and underside of
the unit. Remove the hex nuts above each HDMI connector. Slide the unit apart carefully to expose
the internal PCB and the 8 Dip Switch bank.
When Dip Switch adjustments are complete, carefully slide the unit back together. Being careful
not to over tighten the hex nuts, screw them back in above each HDMI connector. Screw all of the
screws from the sides and underside of the unit back into the unit, again being careful not to over
tighten the screws. Plug all cabling back into its proper location on the unit. Reconnect power to the
unit and test for IR conflicts.
12345678
Remote Channel 3:
12345678
Remote Channel 2:
12345678
12345678

RJ-11 TO SERIAL CONTROL INTERFACE
DB-9 to RJ-11
7
Binary Table
ASCII Input Binary
1 1 0011 0001
2 2 0011 0010
DB-9
Pin Description Connects To RJ-11 Pin
1 Carrier Detect N/A
2 Receive Data 3
3 Transmitted Data 2
4 Data Terminal Ready N/A
5 Ground 1 & 6
6 Data Set Ready N/A
7 Request To Send N/A
8 Clear To Send N/A
9 Ring Indicator N/A Connectors not to scale
61
RJ-11 6-Pin
61
FRONT: FRONT:
Female DB-9
5
96
1
Terminal Settings
Bits per second .................................................................................................. 19200
Data bits .................................................................................................................... 8
Parity ................................................................................................................... None
Stop bits ......................................................................................................................1
Flow Control ........................................................................................................ None
Additional control of the EDID modes and IR channel are possible using the
RS-232 interface. For any of these modes to be successfully written to the
EEPROM, all Dip Switches must be in the OFF position.
OK is printed out on screen when a mode has successfully been changed.
ASCII EDID Mode
m0 0
m1 1
m2 2
m3 3
m4 4
m5 5
m6 6
ASCII Remote Channel
r1 1
r2 2
r3 3
r4 4

Extended display identification data (EDID) is a data structure provided by a
display to describe its capabilities to any source that asks for it. The EDID includes
manufacturer name, product type, timings supported by the display, display size,
luminance data, (for digital displays only) pixel mapping data, supported audio
channels and formats. This information is used by the source to cater its output to
resolutions and audio formats that are supported by the display.
Additional EDID modes are available and configured using a combination of dip
switches 1, 2, and 5. Please refer below for the different EDID modes.
To access the Dip Switches, remove all screws from the bottom and sides of the
Gefen unit. Carefully slide the unit apart. The 8 Bank of Dip Switches are located
on the main PCB. Once adjustments are complete, slide the unit back together and
replace all removed screws.
EDID Mode 0 (Switch 1=OFF Switch2=OFF Switch5=ON)
-EDID is copied from the first HDMI port
EDID Mode 1 (Switch 1=ON Switch2=OFF Switch5=ON)
-Same as Mode 0 and adds basic audio support
EDID Mode 2 (Switch 1=OFF Switch2=ON Switch5=ON)
-Same as Mode 0 and adds full audio support
EDID Mode 3 (Switch 1=ON Switch2=ON Switch5=OFF)
-EDID is generated based on the common video and audio features of all of the
connected devices
EDID Mode 4 (Switch 1=OFF Switch2=ON Switch5=OFF)
-Same as Mode 3 and adds basic audio support
EDID Mode 5 (Switch 1=ON Switch2=OFF Switch5=OFF)
-Same as Mode 3 and adds full audio support
EDID Mode 6 (Switch 1=OFF Switch2=OFF Switch5=OFF) DEFAULT
-EDID is generated based on the common video features of all of the connected
devices and the combined audio features of all of the connected devices
DIP SWITCH
EDID GUIDE
DIP SWITCH GUIDELINES
8

9
RACK EARS INSTALLATION DIAGRAM
Rear of unit
Front of unit
Rack mount ears are provided for installation of this unit into a 1U rack mount
space.
Locate the side screws on the unit.1. Remove the front 2 screws that are located closest to the front of the unit.2. Using the removed screws, screw the rack mounting bracket into the unit.3. Repeat the procedure on the opposite side of the unit.4.
1
2
3
4

WIRING DIAGRAM
10
HDMI
HDMI cable maximum distance is 15 ft at 1080p resolution without a EXT-HDMI-141SBP or EXT-HDMI-CAT5-MS

11
SPECIFICATIONS
Video Amplifier Bandwidth ............................................................................ 165 MHz
Input Video Signal ................................................................................... 1.2 Volts p-p
Input DDC Signal .............................................................................. 5 Volts p-p (TTL)
Single Link Range ........................................................................1080p / 1920 x 1200
Input Connector Type ..................................................... HDMI Type A 19 Pin Female
Output Connector Type ...................................................HDMI Type A 19 Pin Female
Remote Control Port ...................................................... RJ11 Jack For Serial Control
Power Consumption ........................................................................... 60 Watts (max.)
Power Supply .................................................................................................. 24V DC
RackMountable...........................................................................................1URackSpace
Dimensions .............................................................................. 17”W x 1.75”H x 5.5”D
Shipping Weight .................................................................................................. 5 Lbs

20600 Nordhoff St, Chatsworth CA 91311
1-800-545-6900 818-772-9100 fax: [phone]
www.gefen.com [email protected]
*MA-HDMI-248*