Extron electronic MDA 4SV EQ User Manual

MDA EQ Series Setup Guide

75 Ohm

GAIN EQ1GAIN EQ2GAIN EQ3GAIN EQ

VIDEO DISTRIBUTION CONTROLLER

4

The Extron® MDA EQ Series are compact mini distribution amplifiers available with
composite video or S-video and with individual output gain and equalization controls
that compensate for different cable lengths for each output. Each adjustment on the
MDA 4SV EQ model equalizes two outputs. The MDA 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 these
distribution amplifiers for operation.

Installation

1. Turn off and disconnect all equipment from the power source.

2. (Optional) If desired, mount the MDA EQ on a 9.5, 6, or 3.5 inch deep rack shelf; a

projector mounting pole; or furniture.

3. Connect a composite video or an S-video source device to the Input connector.

4. Connect one or two video output devices to the composite video or S-video output

connectors.

5. (Optional) Connect a monitor to the Loop-Thru connector for passive loop-through.

6. Set the termination toggle switch:
о If a monitor is connected to the Loop-Thru connector, set the

switch to High Z (up).

о If no monitor is connected, set the switch to 75 Ohm (down).

7. Wire the provided power supply as shown below and connect it to

the 2-pole, 3.5 mm captive screw connector.

LOOP-THRU

HIGH Z

Smooth

Ridges

A A

Power Supply

Output Cord

Tie Wrap

3/16” (5 mm) MAX

SECTION A–A

Orange Captive Screw

Connector

CAUTION: 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.

MDA EQ Series Setup Guide, cont’d

CAUTION: The power supply must not be permanently fixed to the building structure or

similar structures.

The power supply must not be located within environmental air handling spaces or

the wall cavity.

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.

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.

8. Connect power cords to the input and output devices and turn on all equipment.

9. Adjust the potentiometers for output cable lengths (if needed).
о 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).

4

GAIN EQ1GAIN EQ2GAIN EQ3GAIN EQ

Figure 1. MDA 2V EQ and MDA 4V EQ Default Potentiometer Adjustment

1/2

Y

GAIN EQ

C

1/2

CY

GAINGAIN EQGAIN

Figure 2. MDA 4SV EQ Default Potentiometer Adjustment

о If using long cables, follow these steps to adjust the potentiomenters:

a. Send the Color Bars test signal

to the input, using a video test
generator such as the Extron

LCD
Project or

VTG 300.

b. 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. 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

Extron
MDA 4V EQ

Distribution
Amplifier

MDA 4V EQ

POWER

12V

0.2A MAX

IN

LOOP-THRULOOP-THRU

INPUTINPUT

75 Ohm

see a sharp picture with no
smearing).

d. Repeat steps b and c for the

Extron USA - West

Headqua rters

+800.6 33.9876

Inside USA / Canada Only

+1.714.491.1500
+1.714.491.1517 FAX

rest of the outputs.

Extron USA - East

+800.6 33.9876

Inside USA / Canada Only

+1.919.863.1794
+1.919.863.1797 FA X

Extron Euro pe

+800.3 987.6673

Inside Europe Only

+31.33.4 53.4040
+31.33.4 53.4050 F AX

© 2010 Extron Electronics. All rights reserved.

Figure 3. Application Example — MDA 4V EQ

Extron Asia

+800.7 339.8766

Inside Asia Only

+65.63 83.440 0
+65.63 83.466 4 FAX

Extron Japa n

+81.3.35 11.7655
+81.3.35 11.7656 FAX

Extron Chi na

+400. 883.1568

Inside China Only

+86.21. 3760.1568
+86.21. 3760.1566 FA X

200'
Cable

OUTPUTSOUTPUTS

3

1

4

2

Local Mo nitor

800'

Projec tors

Cable

1,000'
Cable

50' Cabl e

DVD Player

Extron Mid dle East

+971.4.2 991800
+971.4.2 991880 FA X

68-978-50 Rev A
03 10

Flat Pane l
Display