Extron MDA 4V EQ Video Distribution Amplifier User Guide
- June 5, 2024
- Extron
Table of Contents
MDA 4V EQ
USER GUIDE
Introduction
About this Manual
This manual provides information on the Extron MDA 4V EQ video distribution
amplifier and discusses how to install and operate them.
About the MDA 4V EQ Mini Distribution Amplifier
The Extron MDA 4V EQ are compact composite video mini distribution amplifier
with individual output gain and equalization controls that compensate for
different cable lengths for each output. The MDA 4V EQ is also a line driver,
able to handle 1000 feet of Extron Mini HR cable.
MDA 4V EQ — One input, four outputs, composite video with equalization and
gain controls for each output
Features
- Input: One female BNC connector
- Output: Four female BNC connectors and a passive loop-through
- 150 MHz (-3 dB) video bandwidth, fully loaded
- Variable gain and EQ adjustments
- Independent gain and EQ control per output
- Video loop-through
- 1U, quarter rack width metal enclosure
- External Extron Everlast™ power supply included — Provides worldwide power compatibility with high-demonstrated reliability and low power consumption
Installation and Operation
Mounting the MDA 4V EQ
The MDA 4V EQ mini distribution amplifier can be set on a table or mounted on
a rack shelf, see the accessory options at
www.extron.com
Tabletop Use
Four self-adhesive rubber feet are included with the MDA EQ. For tabletop use,
attach one foot at each corner of the bottom side of the unit and place the
unit in the desired location.
Rack Mounting
For optional rack mounting, mount the MDA EQ on one of the rack shelves or
projector mounting brackets listed above. On the standard 9.5 inches deep rack
shelves, the unit can be mounted in one of four locations to the rear of the
rack or in one of four locations to the front of the rack.
- If rubber feet are installed on the bottom of the MDA, remove them.
- Mount the MDA EQ on the rack shelf, using two 4-40 x 3/16” screws in opposite (diagonal) corners to secure the unit to the shelf.
- Install blank panels or other units on the rack shelf.
Furniture Mounting
To furniture-mount, the MDA 4V EQ, use the optional mini under-desk mounting kit, as follows.
Figure 3. Preparing the MDA 4V EQ for Under-desk Mounting
- If rubber feet were previously attached to the bottom of the unit, remove them.
- Attach the mounting brackets to the MDA EQ with the provided machine screws as shown in the previous figure.
- Hold the unit with the attached brackets against the underside of the table or other furniture. On the mounting surface, mark the location of the bracket’s screw holes.
- Drill 3/32” (2 mm) diameter pilot holes, ¼” (6.3 mm) deep in the mounting surface at the marked screw locations.
- Insert #8 wood screws into the four pilot holes. Tighten each screw into the mounting surface until slightly less than ¼” of the screw head protrudes.
- Align the mounting screws with the slots in the brackets and place the unit against the surface, with the screws through the bracket slots.
- Slide the unit slightly forward or back, then tighten all four screws to secure it in place.
Rear Panel Features and Cabling
The following figures shows the back panel configurations of the MDA 4V EQ model.
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Power supply connector
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Passive Loop-Thru connector
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Toggle switch
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Output connectors, composite video
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Input connector, composite video
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Power supply connector — Plug the external 12 VDC power supply into this 2-pin, 3.5 mm captive screw connector. The power supply is included with the unit.
NOTE: The power connector on the rear panel is orange; however, the plug for the power cord may be either orange or blue. Either color plug can be connected to the rear panel receptacle. -
Passive Loop-Thru connector — Connect a monitor (optional) to this female BNC connector.
-
Toggle switch — Set this switch to HIGH Z if a monitor is plugged into the Passive Loop Thru connector. Setting this switch to 75 OHM simulates a monitor when none is attached to the Loop Thru connector.
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Output connectors, composite video — Connect up to four MDA 4V EQ composite video monitors to these BNC connectors.
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Input connector, composite video — Connect a composite video input source to this BNC connector.
Wiring the Connector
WARNING: The two power cord wires must be kept separate while the power
supply is plugged in. Remove power before wiring.
-
Cut the DC output cord to the length needed.
-
Strip the jacket to expose 0.2 inches (5 mm) of the conductors for the blue captive screw plug or 0.3 inches (7 mm) for the orange plug.
ATTENTION: The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inches (5 mm). Any longer and the exposed wires may touch, causing a short circuit between them. Any shorter and the wires can be easily pulled out even if tightly fastened by the captive screws.
NOTE: Stripping the wires to expose less than the recommended amount causes them to slide out of the connector too easily, even if they are tightly pinched by the captive screws. -
Slide the leads into the supplied captive screw plug and lock them, using an Extron Tweaker (small screwdriver).
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Use the supplied tie-wrap to strap the power cord to the extended tail of the connector.
-
To verify the power cord’s polarity before connecting it, plug in the power supply with no load and check the output with a voltmeter.
ATTENTION:
- The installation must always be in accordance with the applicable provisions of National Electrical Code ANSI/NFPA 70, article 725 and the Canadian Electrical Code part 1, section 16.
- The power supply shall not be permanently fixed to the building structure or similar structure.
- Power over Ethernet (PoE) is intended for indoor use only. It is to be connected only to networks or circuits that are not routed to the outside plant or building.
- Unless otherwise stated, the AC/DC adapters are not suitable for use in air handling spaces or in wall cavities. The power supply is to be located within the same vicinity as the Extron AV processing equipment in an ordinary location, Pollution Degree 2, secured to the equipment rack within the dedicated closet, podium, or desk.
- Always use a power supply provided by or specified by Extron. The use of an unauthorized power supply voids all regulatory compliance certifications and may cause damage to the supply and the end product.
- Do not tin the wire leads before installing them into the connector. Tinned wires are not as secure in the connector and could be pulled out. They may also break after being bent several times.
- Extron power supplies are certified to UL/CSA 60950-1 and are classified as LPS (Limited Power Source). Use of a nonLPS or unlisted power supply will void all regulatory compliance certification.
The figure below shows how to wire the connector.
CAUTION: If not provided with a power supply, this product is intended for use with a UL Listed power source marked “Class 2” or “LPS” rated 12 VDC, 0.5 A minimum.
NOTE: Your MDA may have shipped with a blue captive screw plug. The blue connector does not have the extended tail or the included tie-wrap.
Front Panel Features and Operation
The following shows the front panel configurations of the MDA 4V EQ.
- Power indicator LED — This LED, when lit, indicates that the MDA EQ is receiving power.
- Gain and Equalization (EQ) potentiometers — One set for each output. Use a small screwdriver to rotate these potentiometers to adjust the gain and equalization for optimization of the image over the output cable.
FCC Class A Notice
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. The Class A limits
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 instruction manual, may cause harmful interference to
radio communications. The operation of this equipment in a residential area is
likely to cause interference. This interference must be corrected at the
expense of the user.
For information on safety guidelines, regulatory compliances, EMI/EMF compatibility, accessibility, and related topics, see the Extron Safety and Regulatory Compliance Guide on the Extron website.
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www.extron.com
All trademarks mentioned are the property of their respective owners.
Worldwide Headquarters: Extron USA West, 1025 E.
Ball Road, Anaheim, CA 92805, 800.633.9876
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