Altinex 1-In 2-Out VGA Distribution Amplifier DA1907LX User`s guide

DA1907LX Ditto-Amp 1-In, 2-Out VGA DA
User’s Guide
We greatly appreciate your purchase of the DA1907LX Ditto-Amp. We are
sure you will find it reliable and simple to use. Superior performance for
the right price, backed by solid technical and customer support is what
Altinex has to offer.
1.3 Cleaning
We are committed to providing our customers with Signal Management
Solutions® to the most demanding audiovisual installations at competitive
pricing and we welcome you to join the ranks of our many satisfied
customers throughout the world.
1.4 FCC Notice
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with the instructions found herein, may cause harmful
interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own
Any changes or modifications to the unit not expressly approved by
Altinex, Inc. could void the user’s authority to operate the
1. Precautions and Safety Warnings
Please read this manual carefully before using your DA1907LX. Keep this
manual handy for future reference. These safety instructions are to ensure
the long life of your DA1907LX and to prevent fire and shock hazards.
Please read them carefully and heed all warnings.
1.1 General
Qualified Altinex service personnel or their authorized
representatives must perform all service.
1.2 Installation Precautions
To prevent fire or shock, do not expose this unit to water or
moisture. Do not place the DA1907LX in direct sunlight, near
heaters or heat-radiating appliances, or near any liquid. Exposure to
direct sunlight, smoke, or steam can harm internal components.
Handle the DA1907LX carefully; dropping or jarring can damage the
Do not pull any cables that are attached to the DA1907LX.
Clean only with a dry cloth. Never use strong detergents or solvents
such as alcohol or thinner. Do not use a wet cloth or water to clean
the card.
2. Installation Procedures
All display devices (TVs, monitors, projectors, etc.) have internal EDID memory that is used to store the video resolutions, refresh rates, and other data
that works best for that display device. When you connect your computer/laptop to the input of the display, the computer reads this memory and then
adjusts its output signal for the best image. The DA1907LX allows you to use the EDID memory from the device connected to Output 1 or the
DA1907LX’s own internal EDID. Using the internal EDID will allow the computer to choose from a wide range of standard resolutions and refresh
rates; however, these settings may not be optimal for the display.
Step 1.
Determine if the source computer will use the internal EDID or the external EDID of the display device.
For best results, Altinex recommends using the external EDID as that typically provides the best image.
Step 2.
Connect the +9V AC adapter input to AC voltage and the output plug to the DA1907LX. Verify the LED in
the top right corner of the unit’s front panel turns on and RED.
Step 3.
Connect the display devices (monitors and/or projectors) to Outputs 1 & 2 of the DA1907LX. Output 1 is
the display from which the computer will read the EDID memory.
Step 4.
Connect the video output from the computer to the computer input connector on the DA1907LX using the cable provided. If a longer cable is
required, make sure that the cable uses internal coaxial cables and that the cable is not excessively long.
Step 5.
Verify the LED on the face of the unit changes from RED to GREEN indicating an active signal is present. If the LED is not GREEN, the computer may
not be sending video signals.
If using a laptop computer, you may need to be set the laptop to output external video manually using the function keys. If running
Windows, use the Windows key plus the letter P (Win+P). The Windows key is located between the left side CTRL and ALT keys.
Step 6.
Verify the picture quality on both displays is good. If there is no signal, make sure that the display is compatible with the resolution of the computer
graphics card.
Step 7.
The DA1907LX is now operational.
3. Limited Warranty/Return Policies
Please see the Altinex website at for details on warranty and return policies.
DA1907LX Ditto-Amp 1-In, 2-Out VGA DA
User’s Guide
4. Technical Specifications
Specifications are subject to change. See for up-to-date information.
Input Video Signal
Input Connector
Analog Signal Level
15-pin HD F (1)
Outputs 1 & 2
15-pin HD F (2)
Horizontal/Vertical or
2.5 mm jack (1)
Sync on Green
Signal Types
Video Signal
VGA through UXGA and
480p through 1080i
Power Adapter
15-pin HD M-M
Horizontal/Vertical or
Sync on Green
TTL (+/-)
-0.3 V
10 kohms
0 dB +/- 0.5 dB
75 ohms
TTL (+/-)
-0.3 V
Output Sync Signals
+9VDC, 1.1 A
Table 1. DA1907LX General
75 ohms
Output Video Signals
Accessories Included
3 ft. (1 m) Video Cable
1.5 Vp-p max
Input Sync Signal
DC Power
10 kohms
0.1 in Al
Power Consumption
Top Panel
External Adapter: 9 VDC
3.0 in (76 mm)
4.5 in (114 mm)
1.0 in (25 mm)
0.5 lb. (0.2 kg)
Shipping Weight (approx.)
1.0 lb. (0.5 kg)
T Operating
T Maximum
MTBF (calculations)
Table 3. DA1907LX Electrical
90 non-condensing
40,000 hrs.
Table 2. DA1907LX Mechanical
280 mA (2.5 W max.)
DA1907LX Ditto-Amp 1-In, 2-Out VGA DA
User’s Guide
5. About Your DA1907LX
The DA1907LX (Ditto-Amp) is a high-resolution, 1-In 2-Out Distribution Amplifier designed to allow the connection of a single VGA-UXGA source to up to two
scan-rate compatible displays. Very high-resolution video signals are able to pass without degradation in the image quality.
The DA1907LX offers a female 15-pin HD input featuring native Plug & Play compatibility on Output 1. An internal Plug & Play memory option may be
selected for applications where using the Plug & Play feature of the remote device is not desired. Otherwise, the DA1907LX may be configured to read the EDID
from the external source on Output 1 using the native resolution for the external display.
Compact and easy to use, the DA1907LX is perfect for audiovisual installations where a single computer needs to be connected to a projector (or presentation
monitor) and a local monitor simultaneously. The DA1907LX has female 15-pin HD (VGA-type) connectors on all input and output connectors so it can be used
with readily available standard VGA-type cables. If desired, the input and/or output of the DA1907LX can be easily adapted to 5 BNC connectors through
Altinex adapter cables.
The DA1907LX is compatible with RGsB, RGBS, and RGBHV signal types, and using the proper cable type the DA1907LX can be used with MAC, SUN, or SGI
platform computers.
DA1907LX Ditto-Amp 1-In, 2-Out VGA DA
6. Application Diagrams
Diagram 1: Typical Setup
Diagram 2: Internal View
User’s Guide
DA1907LX Ditto-Amp 1-In, 2-Out VGA DA
User’s Guide
7. Operation
The DA1907LX requires no adjustments for optimal performance. Once
set-up, the DA1907LX will work trouble-free without user intervention.
8. Troubleshooting Guide
We have carefully tested and have found no problems in the supplied DA1907LX. However, we would like to offer suggestions for the following:
1. Make sure the unit is plugged into a working AC outlet and the DC plug is inserted all the way into the switcher.
2. Use only the power adapter provided.
The LED should be ON and RED when power is applied.
The LED should be ON and GREEN when the unit is receiving power and a SYNC signal.
1. Make sure the supplied adapter is plugged into a working AC outlet and that the outlet has power.
2. Verify the DC power plug coming from the AC adapter is plugged all the way into the DA1907LX.
3. If adapter has power and the LED is still not on, the DA1907LX or the power adapter may require service.
The LED should be ON and RED when power is applied.
The LED should be ON and GREEN when the unit is receiving power and a SYNC signal.
1. Disconnect the video input from the DA1907LX and verify the LED is ON and RED indicating power is present.
2. Reconnect the computer's video output.
3. Verify the computer output is operating correctly by connecting it directly to a local monitor.
4. Disconnect the video output form the DA1907LX and then reconnect after 5 seconds. The computer screen should
flash when it detects the external device and then output the video. At this time the LED should be green and the
output signal should be present.
5. Make sure the computer is set to output external video using the function keys or the Windows key plus the letter
“P” (Win+P). If the video is present on the output but the LED is still not green, the DA1907LX is working but the
LED may have a problem.
Set the computer for an output of 1024x768 at 60 Hz refresh rate.
Most devices can display this resolution without any problems.
1. Check the source and make sure there is a signal present.
2. Make sure the display has power and is turned on.
No Display
3. Make sure the correct input is selected on the display.
4. Verify the refresh rate of the computer/laptop is compatible with the display. Some laptops provide a refresh rate of
75 Hz that some displays do not accept.
5. Verify the output resolution of the computer/laptop is compatible with the display.
6. Make sure the computer is set to output external video using the function keys or the Windows key plus the letter
“P” (Win+P).
Poor Output Image
1. The source resolution may not be compatible with the projector or other display device. Try other resolutions from
the source.
2. The source and display may not be compatible. Connect the source directly to the input of the projector or other
display device. If the image is poor the devices may be incompatible.