Extron Electronics DDTX-DDRX-DVI User Manual
User’s Guide
Description and Installation
Description
The Direct Digital Transmitter (DDTX) half of the DDTX/DDRX
DVI pair accepts a Digital Visual Interface (DVI) signal or a
Digital Flat Panel (DFP) signal (with a DFP-to-DVI adapter) from
any device that outputs digital video. The DDTX creates
proprietary digital signals, and outputs the signals over coaxial
cable to the Direct Digital Receiver (DDRX) half of the pair. The
transmitter also sends and receives the bidirectional Display Data
Channel (DDC) signals on a separate set of connectors. The
receiver converts the digital and DDC signals back to DVI video,
and outputs it for use by a compatible display device. The
maximum separation between the DDTX and DDRX depends on
the cables used:
• Maximum 150’ (45.72 meters) — This limit applies to systems
using cable of the quality of Extron High Resolution cable.
• Maximum 330’ (100.58 meters) — This limit applies to systems
using cable of the quality of Extron Super High Resolution
cable.
The DDTX is rack mountable and has an internal switching
power supply.
The DDRX comes with its own external desktop power supply
and a detachable bracket for mounting the unit to a projector
mount or other convenient surface. The DDRX is also throughor under-desk mountable with optional mounting kits.
DDTX/DDRX DVI
Direct Digital Transmitter/Direct Digital Receiver
68-545-01 A
Printed in the USA
11 01
Installation
1. Power off the computer and its local monitor.
2. For optional rack mounting, mount the DDTX on one side
of a 19" 1U Universal Rack Shelf (Extron part #60-190-01)
(figure 1).
4-40 X 1/8 screws
Use 2 mounting holes
on opposite corners
Figure 1 — Rack mounting a DDTX
2
DDTX/DDRX DVI • Installation
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False front panel
uses 2 front holes only
Installation
a. If feet were previously installed on the bottom of the
case, remove them.
b. Mount the DDTX on the rack shelf, using two 4-40 x
1/8 screws in opposite (diagonal) corners to secure the
case to the shelf.
3. For optional bracket mounting, attach the included
mounting bracket to the DDRX using the 3 bracket screws.
The DDRX can then be attached to a projector mount or
some other secure surface by inserting the mounting screw
through the bracket’s slotted hole (figure 2).
DDRX DVI
DVI cable
Ceiling
Digital projector
Figure 2 — Bracket mounting a DDRX
4. Connect the DDTX DVI input cable (figure 3) to the DVI
video output port of the computer (figure 4).
DVI Input Cab le
Transmitter
Receiver
Figure 3 — DDTX and DDRX connector panels
100-240 V 0.2A
50/60 Hz
TX0 TX1 TX2 TXC
DISPLAY
INPUTS
TX0 TX1 TX2 TXC
OUTPUTS
POWER
9 -12V 1.0A
DDC
DECBA
DDRX DVI
DIRECT DIGITAL RECEIVER
DDC
ABCDE
6. Connect a DDC cable between the DDC connectors on the
rear of the DDTX and those on the DDRX, see DDC Cable,
below.
7. Connect the desired DVI/DFP-compatible monitor, LCD
panel, or projector to the Display connector on the rear of
the DDRX.
100-240 V 0.3A
DDTX DVI DDRX DVI
DDTX DVI
DIRECT DIGITAL TRANSMITTER
OUTPUTS
50/60 Hz
TX0 TX1 TX2 TXC
ABCDE
DDC
Rear panel
4 BNC cable
Comm-Link cable
Front panel
Rear panel
INPUTS
TX0 TX1 TX2 TXC
DISPLAY
DDC
DECBA
DIRECT DIGITAL RECEIVER
DVI cable
or
PC computer
digital video out
Direct digital displays
HDTV plasma Large screen display
Figure 4 — DDTX/DDRX typical application
The maximum permissible length of the DVI input and
output cables is 16.4 feet (5 meters). Ensure that the
cables do not exceed the maximum permissible length,
otherwise images may be distorted or missing. Extron
does not guarantee signal integrity beyond 16.4 feet.
8. Connect a standard IEC power cord between the DDTX
power connector and a 100 to 240VAC, 50 Hz or 60 Hz
power source.
9. Connect 9-12VDC to the power connector on the DDRX,
either from the included external power supply or from a
source on the projector.
10. Power on the local monitor.
11. Power on the computer.
DDRX DVI
POWER
9 -12V 1.0A
5. Connect coax cable between the TX0, TX1, TX2, and TXC
BNC connectors on the rear of the DDTX and those on the
DDRX.
DDC Cable
The DDTX/DDRX DVI pair requires a DDC cable, up to 330’ in
length. Extron’s Custom Cables on Call can make a DDC cable
made-to-order, or it can be made on-site with Extron’s Plenum
DDTX/DDRX DVI • InstallationDDTX/DDRX DVI • Installation
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