Extron electronics DA Series User manual

Setup Guide — DA AV EQ Series
The Extron® DA AV EQ series are distribution amplifiers
(DAs) that are available with composite video or S-video
plus audio, audio only, and video only. They provide
long cable drive capability and individual gain and
equalization adjustment for each output pair. The two
dual models can each be configured to function as two
DAs.
This guide provides basic instructions for an experienced installer to set up and operate these
distribution amplifiers.
Step 1 — Turn off and disconnect all equipment from power source
Step 2 — Mount the unit (optional)
If desired, mount the DA on a 9.5 inches deep or 6 inches deep rack shelf, or on furniture.
Step 3 — Connect video devices (all models except DA 6A)
• Connect video input: Connect a composite video or an S-video source device to the Input
connector. If using a DA 12V/6V or a DA 8V/4V in dual mode, connect input devices to the
Input A and Input B connectors.
• Connect video output: Connect one or more video output devices to the composite video or
S-video output connectors.
Step 4 — Set dual mode toggle switch (Dual EQ models only)
Set the toggle switch for dual or single mode as follows:
• Dual mode: Set the toggle switch down to Dual 1x4 for the DA 8V/4V or
Dual 1x6 for the DA 12V/6V, as shown at right. The DA functions as two
1-input, 8- or 12-output DAs.
• Single mode: Set the toggle switch up to 1x8 for the DA 8V/4V or 1x12
for the DA 12V/6V. The DA functions as a 1-input, 8- or 12-output DA
with active loop-through.
Step 5 — Connect monitor for loop-through (optional)
Connect a monitor to the Loop-Thru connector for passive loop-through, if desired.
For DA 12V/6V or DA 8V/4V Dual EQ models: If the DA will not be used in dual mode,
connect a monitor to the Input B connector for active loop-through, if desired.
Step 6 — Set termination toggle switch
For all models except DA 6A, DA 12V/6V, and DA 8V/4V Dual EQ:
• If a monitor is connected to the Loop-Thru connector, set the Termination
toggle switch up to high Z for passive loop-through, as shown at right.
• If no monitor is connected, set this switch down to 75 Ohm.
Step 7 — Connect audio inputs
Wire the captive screw or RCA input connectors to an audio source as shown below.
(Continued on reverse side)
LOOP-
THRU
Dual
1 x 6
1 x 12
INPUT B
INPUT A
LOOP-THRU
INPUT
75 Ohm
HIGH Z
L R
AUDIO
L R
AUDIO
Unbalanced Input
Tip
Sleeve
Tip
Sleeve
Balanced Input
Tip
Ring
Sleeve (s)
Tip
Ring
Tip (+)
Sleeve ( )
RCA connector

Setup Guide — DA AV EQ Series, cont’d
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Step 8 — Connect audio outputs
Connect audio output devices to the RCA or captive screw audio Output connectors as shown
below (captive screw) and in Step 7 (RCA).
N For advanced audio settings, refer to chapter 2, “Installation and Rear
Panel,” of the DA AV EQ Series User’s Manual.
Step 9 — Power on
Connect power to the DA and to all input and output devices.
Step 10 — Adjust potentiometers for output cable lengths (if
needed)
• If using very short output cables, ensure that
the potentiometers are in the unity gain position;
that is, with the arrow on each potentiometer
pointing to the dot beside or above it. If the
potentiometers are already in the unity position
(shown in the example for inputs 1 and 2, at
right). Do not change them.
If the potentiometers are not in unity gain
position, rotate them, using a small screwdriver.
• If using long cables, follow these steps to adjust the potentiometers:
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 pair 1 and 2 until the signal level at the far
end is the same as the input (or the display shows the correct brightness and contrast).
c. Adjust the EQ potentiometer
for outputs 1 and 2 so that no
overshoot or round front corners
appear at the far end on the scope
(or until you see a sharp picture
with no smearing).
d. Repeat steps b and c for the rest of
the outputs.
Application Diagram
The figure at right provides an example
of how a DA AV EQ series distribution
amplifier may be connected.
68-977-50
Rev. A
03 10
CAUTION
For unbalanced audio, connect the sleeve(s)
to the ground contact. DO NOT connect the
sleeve(s) to the negative (–) contacts.
Tip
Ring
Tip
Ring
L R
Sleeve(s)
Do not tin the wires!
Tip
NO Ground Here
Sleeve(s)
NO Ground Here
Tip
L R
Balanced Audio Output Unbalanced Audio Output
DA 6SVA EQ
OUTPUTS
INPUT
LOOP-THRU
HIGH Z
75 Ohm
5
3
1
6
42
50/60 Hz
100-240V 0.2A
INPUT OUTPUTS
LR
LR
1
2
L R
LR
LR
3
4
L R
LR
5
6
Sound System
Projector
DVD
Monitor
(Loop-through)
DA 6SVA EQ
Audio Video
Distribution
Amplifier
HDTV
Plasma
Displays
VCR
6' Cables
800'
Cables
100'
Cables
1000'
Cables
EQGAIN
Y C
1/2
GAIN
EQGAIN
1/2
Composite Video
Models S-video Models