Extron Electronics MDA EQ Series Setup Guide - Manual (Page 2)

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).
GAIN EQ
1
GAIN EQ
2
GAIN EQ
3
GAIN EQ
4
Figure 1. MDA 2V EQ and MDA 4V EQ Default Potentiometer Adjustment
1/2
GAIN GAIN EQ GAIN
C
GAIN EQ
Y
1/2
C Y
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
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
see a sharp picture with no
smearing).
d. Repeat steps b and c for the
rest of the outputs.
MDA EQ Series Setup Guide, cont’d
© 2010 Extron Electronics. All rights reserved.
68-978-50 Rev A
03 10
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Headquarters
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Inside China Only
+86.21.3760.1568
+86.21.3760.1566 FAX
Extron Middle East
+971.4.2991800
+971.4.2991880 FAX
Figure 3. Application Example — MDA 4V EQ
MDA 4V EQ
POWE
R
12V
0.2A MA
X
INPUT INPUT
LOOP-THR
U
LOOP-THR
U
OUTPUT
S
OUTPUT
S
IN
1
2
75 Oh
m
3
4
Projectors
Local Monitor
Flat Panel
Display
LCD
Projector
Extron
MDA 4V EQ
Distribution
Amplifier
DVD Player
200'
Cable
1,000'
Cable
50' Cable
800'
Cable