Gefen DVI-248 User Manual

2x8 DVI DA

USER MANUAL

www.gefen.com

ASKING FOR ASSISTANCE

Technical Support:

Telephone [phone]
[phone]

Fax [phone]

Technical Support Hours:

8:00 AM to 5:00 PM Monday through Friday PST.

Write To:

Gefen Inc.
C/O Customer Service
20600 Nordhoff St.
Chatsworth, CA 91311

www.gefen.com
[e-mail]

Gefen Inc. reserves the right to make changes in the hard ware, packaging and any

accompanying doc u men ta tion without prior written notice.

The 2:8 DVI Distribution Amplifi er is a trademark of Gefen Inc.

© 2007 Gefen Inc., All Rights Reserved

Notice

1

Introduction

2

Operation Notes

3

Panel Descriptions

4

Dip Switch Settings

5

IR Code Confl icts

6

RS-232 Interface

7

Specifi cations

8

Warranty

TABLE OF CONTENTS

INTRODUCTION

Congratulations on your purchase of the 2:8 DVI Distribution Amplifi er. The 2:8 DVI distri-
bution amplifi er is an innovative solution for anyone with more complex computer system
requirements, like studios and presentation venues where multi-viewing is essential. The
2:8 DVI distribution amplifi er accommodates various system scenarios. Most commonly,
two video sources (either DVI-equipped computer, DVD player or satellite set top box)
are connected to the distribution amplifi er on one side. On the output side, eight video
outputs are available to be used in part or in full. Once the unit is connected and powered,
each source can be routed to multiple displays. All DVI displays are driven by the two DVI
sources with each source or computer capable of driving eight displays at one time. For
home theater applications, the unit is HDCP (high defi nition content protection) compliant,
making it effective for use with all DVI displays.

How it works:

Gefen’s Gefen 2:8 DVI distribution amplifi er is an expandable distribution hub that sends
the same DVI graphics source to eight DVI based digital screens (fl at panels or projec-
tors). It is a fl exible solution that accommodates multiple DVI displays. Y ou can switch from
source one and two via the RMT-2IR remote control. The 2:8 DVI distribution amplifi er is
also equipped with an auto sensing feature to switch between whatever source is active.
When one source is inactive it will automatically switch to the active source.

The Gefen 2:8 DVI distribution amplifi er is connected with a DVI (male to male) cable from
the DVI graphic source to the distribution amplifi er input. There are eight DVI outputs in
each module. DVI output one is the primary connection and is used for the main display.
DVI output 2 thru 8 follow the main display. The 2:8 DVI distribution amplifi ers is using a
unique DVI Bus™ technology to connect multiple amplifi ers without sacrifi cing a DVI output
connection. The ninth output is an expansion output used to daisy chain an additional 2:8
DVI Distribution Amplifi er. The 2:8 DVI Distribution Amplifi er is expandable to 256 outputs
(32 DVI DA’s).

Contents:

The 2:8 DVI Distribution Amplifi er consists of:
(1) 2x8 DVI Distribution Amplifi er

(1) DVI 6ft Male to Male Cables
(1) 24VDC Power Supply
(1) RMT-2 IR Remote
(1) User Manual

1

OPERATION NOTES

READ THESE NOTES BEFORE INSTALLING

OR OPERATING THE 2:8 DVI DISTRIBUTION AMPLIFIER SYSTEM

• All the monitors connected to the 2:8 DVI Distribution Amplifi er must be able to run at the

same native resolution. The 2:8 DVI Distribution Amplifi er does not scale the video.

• The 2:8 DVI Distribution Amplifi er units are housed in a metal box for better RF shield-
ing.

• You must connect the sources and displays prior to applying power to the unit.

2

IR Eye

2:8 DVI DISTRIBUTION DA FRONT PANEL DESCRIPTION

DVI Output

DVI Input

3

RS-232

Input

IR

Extender

Input

Power

Input

DIP SWITCH SELECT SETTINGS

DIP SWITCH

EDID GUIDE

Extended display identifi cation 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 confi gured 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. Remove the hex screw heads from each side of the rear DVI & RS-232 ports.
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 fi rst 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

4

IR CODE CONFLICTS

How to Resolve IR Code Confl icts

There are matching pairs of dip switches underneath the 2x8 DVI DA unit and under the
remote battery cover. Switch 1 & 2 on the Remote and Switch 3 & 4 inside the unit are the
matching switches. These switches need to be matched for the remote to
communicate with the switcher. There are 4 possible sets of IR codes and at least one of
these sets should be able to resolve any IR confl icts with other home theater devices.

Remote Channel 1:

1

Remote

2

Remote Channel 2:

Remote Channel 3:

Remote Channel 4:

2:8 DVI Distribution Amplifier

1

2

1

2

1

2

Remote Channel 1:
Default

1

Remote Channel 3:

1

3

2

3

2

Remote Channel 2:

5

4

5

4

7

6

6

8

Remote Channel 4:

7

8

1

1

3

2

3

2

5

4

5

4

7

6

6

8

7

8

5

RS-232 INTERFACE

Binary Table

ASCII Input Binary

1 1 0011 0001
2 2 0011 0010

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.

ASCII EDID Mode

m0 0
m1 1
m2 2
m3 3

ASCII Remote Channel

r1 1
r2 2
r3 3

r4 4
m4 4
m5 5
m6 6

OK is printed out on screen when a mode has successfully been changed.

Terminal Settings

Bits per second ...................................................................................................... 19200

Data bits ........................................................................................................................ 8

Parity ....................................................................................................................... None

Stop bits ..........................................................................................................................1

Flow Control ............................................................................................................ None

6

SPECIFICATIONS

Video Amplifi er Bandwidth ................................................................................. 1.65 GHz

Single Link Range ......................................................................................... 1920 x 1200

Vertical Frequency Range ....................................................................................... 60 Hz

DVI Input/Output Connector Type ....................................................... DVI-I (Digital Only)

Power Consumption ................................................................................ 60 Watts (max.)

Power Supply ........................................................................................................ 24VDC

Dimensions ................................................................................... 17”W x 1.75”H x 7.5”D

Rackmountable .......................................................................................... 1 Rack Space

Shipping Weight ....................................................................................................... 8 Lbs

7