DISTRIBUTION AMPLIFIERS
MANUAL PART NUMBER: 400-0004-004
DA1804NT
1-IN, 4-OUT VIDEO DISTRIBUTION
AMPLIFIER
USER’S GUIDE
DISTRIBUTION AMPLIFIERS
TABLE OF CONTENTS
Page
PRECAUTIONS / SAFETY WARNINGS................ 2
GENERAL..........................................................2
HANDLING ........................................................2
CLEANING.........................................................2
FCC NOTICE.....................................................2
ABOUT YOUR DA1804NT.......................................3
TECHNICAL SPECIFICATIONS.............................. 3
PRODUCT DESCRIPTION ...................................... 4
APPLICATION DIAGRAMS ...................................... 5
DIAGRAM1: TYPICAL SETUP ..........................5
DIAGRAM2: INTERNAL VIEW ..........................5
INSTALLING YOUR DA1804NT............................. 6
OPERATION............................................................... 6
TROUBLESHOOTING GUIDE................................. 6
POWER LED IS NOT ON...................................6
LED ISNOT GREEN..........................................6
NO REMOTE IMAGE.........................................7
REMOTE IMAGE QUALITY ISPOOR ................7
ALTINEX POLICIES.................................................. 7
LIMITEDWARRANTY/RETURN POLICIES.......7
CONTACT INFORMATION................................7
400-0004-004
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DISTRIBUTION AMPLIFIERS
PRECAUTIONS / SAFETY WARNINGS 1
Please read this manual carefully before using your
DA1804NT and keep it handy for future reference.
These safety instructions are to ensure the long life
of your DA1804NT and to prevent fire and shock
hazards. Please read them carefully and heed all
warnings.
1.1 GENERAL
• Qualified ALTINEX service personnel or its
authorized representatives must perform all
service.
• Connect the unit to a properly rated supply
circuit.
1.2 HANDLING
• Handle the DA1804NT carefully. Dropping or
jarring can damage internal components.
• For best results, place the DA1804NT on a flat,
level surface in a dry area away from dust and
moisture.
• To prevent fire or shock, do not expose this unit
to water or moisture. Do not place the
DA1804NT in direct sunlight, near heaters, or
heat-radiating appliances, or near any liquid.
Exposure to direct sunlight, smoke, or steam can
harm internal components.
• Do not pull the cables that are attached to the
DA1804NT.
• To turn off the main power, be sure to remove
the cable from the power outlet. The power
outlet socket should be installed as near to the
equipment as possible and should be easily
accessible.
1.4 CLEANING
1.5 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
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 expense.
• Any changes or modifications to the unit not
expressly approved by ALTINEX, Inc. could void
the user’s authority to operate the equipment.
• Clean only the connector area 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 unit. Do not clean or touch
any component or PCB.
400-0004-004
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DISTRIBUTION AMPLIFIERS
ABOUT YOUR DA1804NT 2
DA1804NT
1-In, 4-Out Video Distribution Amplifier
The DA1804NT is a 1-In, 4-Out Distribution
Amplifier designed to allow the connection of a
single video source to as many as four display or
recording devices.
The DA1804NT can pass NTSC, PAL, and SECAM
composite video signals. It can also pass
high-resolution monochrome computer video, such
as grayscale signals used in medical imaging. The
DA1804NT can handle video signals with levels up
to 1.5 Vp-p.
State-of-the-art technology gives the DA1804NT a
bandwidth of 350 MHz with a very flat frequency
response up to 200MHz. It also offers a differential
gain of 0.15% and a differential phase of 0.15
degrees.
The DA1804NT Distribution Amplifier has a pre-set
gain of 0 dB; each output is completely
independent and can withstand shorts to ground.
Extremely rugged and compact, the DA1804NT fits
easily into tight spots. Using high-quality 75 ohm
coaxial cable, it can drive an NTSC signal 400 ft
(122 m) or more.
TECHNICAL SPECIFICATIONS 3
Specifications are subject to change.
See www.altinex.com for up-to-date information.
FEATURES/DESCRIPTION DA1804NT
GENERAL
Inputs BNC female (1)
Outputs BNC female (4)
NTSC, PAL, SECAM,
Compatibility
Table 1. DA1804NT General
MECHANICAL DA1804NT
Material Gray 0.1” Al
Top Label Lexan
Height (inches) 1.0 in (25 mm)
Width (inches) 4.6 in (117 mm)
Depth (inches) 3.5 in (89 mm)
Weight (pounds) 0.4 lb (0.18 kg)
T° Operating 10°C-35°C
T° Maximum 50°C
Humidity
MTBF (calculations) 40,000 hrs
Table 2. DA1804NT Mechanical
High Resolution
Monochrome
Computer Video
90% non-condensing
400-0004-004
ELECTRICAL DA1804NT
Input Video Signal
Analog Signal 1.5 Vp-p max.
Impedance 75 ohm
Output Video Signal
Analog Signal 0 dB +/- 0.5 dB
Impedance 75 ohm
Frequency Compatibility
Video Bandwidth 350 MHz @ -3 dB
Coupling DC
Power
External Adapter (included) 9 VDC 500 mA
Power Consumption 0.4 W max.
Table 3. DA1804NT Electrical
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DISTRIBUTION AMPLIFIERS
PRODUCT DESCRIPTION 4
+9VDC
INPUT
VIDEO
INPUT
FEMALE BNC
POWER/
SIGNAL LED
4 VIDEO
OUTPUTS
FEMALE BNC
+9VDC
INPUT
VIDEO
INPUT
POWER/
SIGNAL LED
4 VIDEO
OUTPUTS
400-0004-004
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DISTRIBUTION AMPLIFIERS
APPLICATION DIAGRAMS 5
DIAGRAM 1: TYPICAL SETUP
DA1804NT
DIAGRAM 2: INTERNAL VIEW
INPUT
BNC
POWER
9VDC,500mA
P.S.
SIGNAL
DETECT
OUTPUT
BNCs
OUT 1
OUT 2
OUT 3
OUT 4
POWER
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DISTRIBUTION AMPLIFIERS
INSTALLING YOUR DA1804NT 6
Step 1. Connect one end of the power adapter
cable to the DA1804NT and the other to
the power outlet. The Power/Signal
Present LED on the side panel should be
on and red indicating the unit is
operational.
Step 2. Connect a coaxial cable from the video
source (VCR, Document Camera, etc.) to
the input connector of the DA1804NT.
If the video source providing a video
image, the Power/Signal Present LED on
the DA1804NT should turn from red to
green indicating a valid signal is present.
Step 3. Connect the output connectors of the
DA1804NT to the display devices
(monitors or projectors) using coaxial
cables.
Step 4. The images on the outputs of the
DA1804NT should be equivalent to the
input source signal.
Step 5. Installation is complete. There are no
further connections or settings required.
OPERATION 7
The DA1804NT requires no adjustments for
performance. Once set up, the DA1804NT will work
trouble-free without user intervention as long as
cables are attached properly and other technical
specifications are followed.
TROUBLESHOOTING GUIDE 8
We have carefully tested and found no problems in
the supplied DA1804NT; however, we would like to
offer suggestions for the following:
8.1 POWER LED IS NOT ON
The Power/Signal Present LED should be on
and red when power is applied with no input
signal.
Cause 1: There is no AC power.
Solution: Only use the external adapter
supplied with the DA1804NT. Verify
the adapter is plugged into a
working AC outlet and that the outlet
has power.
Cause 2: The adapter is not plugged into
the DA1804NT.
Solution: Verify the DC power plug coming
from the AC adapter is plugged all
the way into the DA1804NT.
Cause 3: The FPI100HR has a problem.
Solution: If there is AC power to the adapter
and the LED still does not turn on,
the DA1804NT or the power adapter
may require service. Please call
ALTINEX at (714) 990-2300.
8.2 LED IS NOT GREEN
The Power/Signal Present LED should be on
and red when power is applied, but then turn
green when receiving a video signal.
400-0004-004
Cause 1: There is no power.
Solution: If the LED is on and red indicating
power is present, reconnect the
computer's video output. If the LED
is still not green, see Cause 2.
Cause 2: There is no sync signal.
Solution: Verify the computer output is
operating correctly by connecting it
directly to the local monitor. If the
display is good, call ALTINEX at
(714) 990-2300.
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DISTRIBUTION AMPLIFIERS
8.3 NO REMOTE IMAGE
Cause 1: The source has a problem.
Solution: Check the image on the local
monitor and verify the quality is
good. If the local image is good, see
Cause 2.
Cause 2: Cable connections are incorrect.
Solution: Make sure that cables are
connected properly. Also, make sure
that the continuity and wiring are
good. If there is still no image, call
ALTINEX at (714) 990-2300.
8.4 REMOTE IMAGE QUALITY IS POOR
Cause 1: The source has a problem.
Solution: Check the image on the local
monitor and verify the quality is
good. If the local image is good, see
Cause 2.
Cause 2 Poor signal transmission.
ALTINEX POLICIES 9
9.1 LIMITED WARRANTY/RETURN POLICIES
Please see the ALTINEX website at
www.altinex.com for details on warranty and
return policies.
9.2 CONTACT INFORMATION ALTINEX, Inc.
592 Apollo Street
Brea, CA 92821 USA
TEL: 714 990-2300
TOLL FREE: 1-800-ALTINEX
WEB: www.altinex.com
E-MAIL: solutions@altinex.com
Solution: Check the cables for continuity and
make sure that connections are
wired properly to verify that there is
good signal transmission. We
recommend ALTINEX-made cables
for best results. If the image is still
not correct, call ALTINEX at
(714) 990-2300.
400-0004-004
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