MDA EQ Series Setup Guide
1
GAIN
2
EQ
3
GAIN
EQ
GAIN
4
EQ
GAIN
EQ
VIDEO DISTRIBUTION CONTROLLER
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.
2.
3.
4.
5.
6.
7.
Turn off and disconnect all equipment from the power source.
(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.
Connect a composite video or an S-video source device to the Input connector.
Connect one or two video output devices to the composite video or S-video output
connectors.
(Optional) Connect a monitor to the Loop-Thru connector for passive loop-through.
Set the termination toggle switch:
HIGH Z
оо If a monitor is connected to the Loop-Thru connector, set the
switch to High Z (up).
LOOP-THRU 75 Ohm
оо If no monitor is connected, set the switch to 75 Ohm (down).
Wire the provided power supply as shown below and connect it to
the 2-pole, 3.5 mm captive screw connector.
Smooth
A
Ridges
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.
9.
Connect power cords to the input and output devices and turn on all equipment.
Adjust the potentiometers for output cable lengths (if needed).
оо 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).
1
GAIN
2
EQ
GAIN
3
EQ
GAIN
4
EQ
GAIN
EQ
Figure 1. MDA 2V EQ and MDA 4V EQ Default Potentiometer Adjustment
Y
GAIN
1/2
EQ
C
GAIN
Y
GAIN
1/2
EQ
C
GAIN
Figure 2. MDA 4SV EQ Default Potentiometer Adjustment
оо 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
LCD
Projector
generator such as the Extron
200'
VTG 300.
Cable
800'
Projectors
Cable
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
1,000'
Cable
and contrast).
50' Cable
c. Adjust the EQ potentiometer
Extron
for output 1 so that no
MDA 4V EQ
overshoot or round front
Distribution
corners appear at the far end
Amplifier
Flat Panel
on an oscilloscope (or you
Display
see a sharp picture with no
DVD Player
smearing).
Local Monitor
d. Repeat steps b and c for the
rest of the outputs.
Figure 3. Application Example — MDA 4V EQ
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IN
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4
EQ
MD
2
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12 MA
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Extron USA - West
Headquarters
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Inside USA / Canada Only
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Oh
U
HR
-T
OP
LO
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