MDA 4V EQ • Setup Guide
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The Extron MDA 4V EQ is a compact mini distribution amplifier available with composite video and with individual output gain and equalization controls that compensate for different cable lengths for each output. The MDA 4V EQ products are also line drivers, able to equalize signals sent over 1000 feet (300 m) of Extron Mini High Resolution cable. This guide provides basic instructions for an experienced installer to set up this distribution amplifiers for operation.
GAIN 1 EQ GAIN 2 EQ GAIN 3 EQ GAIN 4 EQ VIDEO DISTRIBUTION CONTROLLER
Installation
1. Turn off and disconnect all equipment from the power source.
2. 3. 4. 5. 6. 7. If desired, mount the MDA 4V EQ on a standard or 6 inch deep rack shelf, a projector mounting pole, or on furniture (see the Extron website for mounting options). Connect a composite video source device to the Input connector.
Connect one or two video output devices to the composite video output connectors. (Optional) Connect a monitor to the Loop-Thru connector for passive loop-through.
Set the termination toggle switch: Smooth
A
Ridges
A
• • If a monitor is connected to the Loop-Thru connector, set the switch to High Z (up). If no monitor is connected, set the switch to 75 Ohm (down).
Wire the provided power supply as shown on the right and connect it to the 2-pole, 3.5 mm captive screw connector.
Power Supply Output Cord
SECTION A–A
Tie Wrap
0.3” (7 mm) MAX
Orange Captive Screw Connector
ATTENTION:
• • • • Always use a power supply provided by Extron for the MDA EQ series. Use of an unauthorized power supply voids all regulatory compliance certification and may cause damage to the supply and the MDA.
Utilisez toujours une source d’alimentation fournie ou recommandée par Extron. L’utilisation d’une source d’alimentation non autorisée annule toute certification de conformité réglementaire, et peut endommager la source d’alimentation et l’unité.
The power supply must not be permanently fixed to the building structure or similar structures.
La source d’alimentation ne devra pas être fixée de façon permanente à la structure de bâtiment ou à d’autres structures similaires.
• • Do not place the power supply within environmental air handling spaces or the wall cavity. Avant de connecter l’alimentation, veuillez lire attentivement les mises en garde ci-dessous.
• • • • The installation must be in accordance with the applicable provisions of the National Electrical Code ANSI/NFPA 70, Article 725 and the Canadian Electrical Code, Part 1, Section 16.
Cette installation doit toujours être conforme aux dispositions applicables du Code américain de l’électricité (National Electrical Code) ANSI/NFPA 70, article 725, et du Code canadien de l’électricité, partie 1, section 16.
The power supply must be located within the same vicinity as the Extron A/V processing equipment in an ordinary location, Pollution Degree 2, secured to a podium, a desk, or an equipment rack within a dedicated closet.
La source d’alimentation doit être placée à proximité de l’équipement Extron dans un emplacement ordinaire soumis à un degré de pollution de catégorie II, solidement fixé au rack d’équipement d’une baie technique, d’un pupitre, ou d’un bureau.
8. Connect power cords to the input and output devices and turn on all equipment.
1
9. Adjust the potentiometers for output cable lengths (if needed).
•
If using very short output cables,
set all potentiometers to the default setting (with the arrow on the potentiometer pointing to the dot beside it as shown).
GAIN 1 EQ GAIN 2 EQ GAIN 3 EQ GAIN 4 EQ
•
Figure 1. MDA 4V EQ Default Potentiometer Adjustment If using long cables
, follow these steps to adjust the potentiometers: a. b. Send the Color Bars test signal to the input, using a video test generator. Adjust the Gain potentiometers for output 1 until the signal level at the far end is the same as the input (or the display shows the desired brightness and contrast).
c. d. Adjust the EQ potentiometer for output 1 so that no overshoot or round front corners appear at the far end on an oscilloscope (or you see a sharp picture with no smearing).
Repeat steps
b
and c for the rest of the outputs.
LCD Projector 200' Cable 800' Cable Projectors
m 75 Oh 1 2 3 4 Extron MDA 4V EQ
Distribution Amplifier
MDA 4V EQ IN POWE R 12V 0.2A MA X Figure 2.
50' Cable 1,000' Cable Flat Panel Display DVD Player Local Monitor
MDA 4V EQ Application Drawing
2 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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