User’s Manual
Audio/Video Distribution Amplifiers
DA 6A
DA 6V EQ
DA 6AV EQ
DA 6AV RCA EQ
DA 6SV EQ
DA 6SVA EQ
DA 6SVA RCA EQ
DA 8V/4V Dual EQ
DA 12V/6V Dual EQ
DA 3AV RCA
Extron Electronics, USA
1230 South Lewis Street
Anaheim, CA 92805
800.633.9876 714.491.1500
FAX 714.491.1517
Extron Electronics, Europe
Beeldschermweg 6C
3821 AH Amersfoort, The Netherlands
+800.3987.6673 +31.33.453.4040
FAX +31.33.453.4050
Extron Electronics, Asia
135 Joo Seng Rd. #04-01
PM Industrial Bldg., Singapore 368363
+800.7339.8766 +65.6383.4400
FAX +65.6383.4664
Extron Electronics, Japan
Kyodo Building, 16 Ichibancho
Chiyoda-ku, Tokyo 102-0082
Japan
68-977-01, Rev. B
09 07
+81.3.3511.7655 FAX +81.3.3511.7656
© 2007 Extron Electronics. All rights reserved.
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ㅸ⬺₷ⶳㆱ愈⌗ⅈ⫟⌰垍䗅㋫㓾ɿ
FCC Class A Notice
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may
cause undesired operation. The Class A limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case
the user will be required to correct the interference at his own expense.
This unit was tested with shielded cables on the peripheral devices. Shielded
cables must be used with the unit to ensure compliance with FCC emissions
limits.
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Quick Start Guide — DA AV EQ Series
To install and set up a DA AV EQ Series distribution amplifier, follow
these steps:
Step 1
Turn all of the equipment off and disconnect it from the power
source.
Step 2
Mount the DA AV EQ on a rack shelf, under a desktop or podium,
or through a desktop. See “Mounting the DA AV EQ Series” in
chapter 2, “Installation and Rear Panel,” for mounting procedures.
See “Optional Accessories” in appendix A, “Specifications, Parts,
and Accessories,” for part numbers.
Step 3
Wire the audio captive screw connectors. For the models with
captive screw connectors for audio input and output, follow the
illustrations below to wire them.
Tip
Sleeve
Tip
Ring
Sleeves
Tip
Ring
Tip
Sleeve
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Balanced Stereo Input
Unbalanced Stereo Input
Wiring the captive screw audio input connectors
Tip
NO GROUND HERE
Sleeves
Tip
Ring
Sleeves
Tip
Tip
NO GROUND HERE
Ring
Balanced Output
Unbalanced Output
CAUTION
For unbalanced audio, connect both sleeves
to the center contact ground. DO NOT connect
the sleeves to the negative (-) contacts.
Do not tin the wires!
Wiring the captive screw audio output
connectors
Disconnect all power to the unit before wiring.
QS-1
DA AV EQ Series • Quick Start Guide
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Quick Start Guide — DA AV EQ Series, cont’d
Table of Contents
Step 4
Chapter 1 • Introduction .......................................................... 1-1
About this Manual ................................................................ 1-2
Connect the cables of the input and output devices to the
DA AV EQ, and power on all equipment.
About the DA AV EQ Series .............................................. 1-2
Models .................................................................................... 1-2
Features .................................................................................. 1-3
Application diagrams ............................................................ 1-4
•
S-video devices are connected to 4-pin mini DIN
connectors.
•
Composite video devices are connected to BNC
connectors.
Chapter 2 • Installation and Rear Panel........................ 2-1
Audio devices are connected to captive screw or RCA connectors.
Mounting the DA AV EQ Series ...................................... 2-2
Tabletop use........................................................................... 2-2
Rack mounting....................................................................... 2-2
UL rack mounting requirements ..................................... 2-2
Rack mounting procedure .............................................. 2-3
Furniture mounting............................................................... 2-4
Through-desk mounting ....................................................... 2-6
Step 5
Adjust the potentiometers (pots) for the output cable lengths, if
necessary.
•
If using very short output cables, make sure that the
potentiometers are in the unity gain position; that is, with the
arrow on each pot pointing to the dot beside or above the pot.
Rear Panel Features and Cabling .................................. 2-7
Setting the Audio Output Gain .................................... 2-12
If the pots are already in the unity gain position (factory default
settings), DO NOT CHANGE THEM. If they are not in the
unity gain position, rotate them into position, using an Extron
Tweeker. The illustration below shows the pots for outputs 1
and 2 at the unity gain position.
Chapter 3 • Front Panel Features and Operation ... 3-1
Front Panel Features ............................................................ 3-2
Gain and Equalization Controls ..................................... 3-4
Settings for short cables ........................................................ 3-5
Adjusting for long cables ...................................................... 3-6
Adjusting with an oscilloscope ....................................... 3-6
Adjusting without an oscilloscope ................................. 3-6
1/2
GAIN EQ
1/2
Y
C
GAIN EQ GAIN
Composite Video Models
S-video Models
Appendix A • Specifications, Parts, and
Accessories........................................................................................ A-1
Potentiometers at unity gain setting
•
If using long cables, follow these steps to adjust the pots:
Specifications ......................................................................... A-2
Models ........................................................................................ A-6
Included Parts......................................................................... A-7
Optional Accessories........................................................... A-7
Cables ......................................................................................... A-8
a.
b.
c.
Supply the Color Bars test signal to the input.
(Recommendation: Use an Extron VTG 300 Video Test
Generator to generate the test signal.)
Adjust the Gain pot(s) 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).
Adjust the EQ pot 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).
All trademarks mentioned in this manual are the properties of their respective owners.
d.
Repeat steps b and c for the rest of the outputs.
68-977-01 Rev. B
09 07
QS-2
DA AV EQ Series • Quick Start Guide
DA AV EQ Series • Table of Contents
i
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Table of Contents, cont’d
DA AV EQ Series
Chapter One
This page was intentionally left blank.
1
Introduction
About this Manual
About the DA AV EQ Series
ii
DA AV EQ Series • Table of Contents
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Introduction
DA 8V/4V Dual EQ — Dual composite video DA that can
function as either a 1-input, 8-output DA with one active
loop-through or two 1-input, 4-output DAs in one
enclosure (no loop-through); equalization and gain
controls
About this Manual
This manual provides information on the Extron DA AV EQ
series of audio/video distribution amplifiers and discusses how
to install and operate them.
The terms “DA,” “amplifier,” and “distribution amplifier” are
used interchangeably to refer to any of the models in the
DA AV EQ series.
Features
Equalization and gain control — Independent gain and
equalization control for each two outputs provides more
flexibility and more accurate cable compensation to drive
different lengths of cables from different outputs. (S-video
models have Y-only equalization, and Y and C gain
controls.)
About the DA AV EQ Series
The Extron DA AV EQ Series products are high-performance
composite video or S-video distribution amplifiers with audio.
Models with audio only and video only are also available. The
DA AV EQ series amplifiers feature long cable drive capability
and individual gain and equalization adjustments (for every
two outputs) to optimize the picture for displays that are
located at significantly different distances from the DA.
Outputs with similar lengths of cables should be paired
in the same output group so that they can share the same
gain and EQ setup.
Passive video loop-through — All models except DA 6A,
DA 12V/6V Dual EQ, and DA 8V/4V Dual EQ feature a
passive video loop-through channel with a 75 ohm
impedance toggle switch, which provides for local
monitoring and cascading to another distribution
amplifier.
Models
The DA AV EQ Series consists of the following 10 models:
DA 6V EQ — One input, six outputs, composite video with
equalization and gain controls
Power supply — An internal 100 VAC to 240 VAC, 50/60 Hz,
DA 6AV EQ — One input, six outputs, audio, and composite
autoswitchable power supply is provided on all models.
video with equalization and gain controls
Enclosure — All models have a compact 1U, half rack
DA 6AV RCA EQ — One input, six outputs, audio on RCA
connectors, and composite video with equalization and
gain controls
enclosure, six inches in depth.
High bandwidth — Bandwidth of 150 MHz @ -3 dB for
composite video and S-video maintains signal quality
without picking up noise.
DA 6SV EQ — One input; six outputs; S-video with luma (Y)
equalization control, and luma and chroma gain controls
Rack and furniture mountability — All models can be
mounted on a rack shelf, under a desk or podium, or
through a desk or table top.
DA 6SVA EQ — One input; six outputs; audio; and S-video
with luma (Y) equalization control, and luma and chroma
gain controls
DA 6SVA RCA EQ — One input; six outputs; audio on RCA
connectors; and S-video with luma (Y) equalization
control, and luma and chroma gain controls
DA 6A — One input, six outputs, audio only
DA 3AV RCA — One input, three outputs, audio on RCA
connectors, and composite video
DA 12V/6V Dual EQ — Dual composite video DA that can
function as either a 1-input, 12-output DA with one active
loop-through, or two 1-input, 6-output DAs in one
enclosure (no loop-through); equalization and gain
controls
1-2
DA AV EQ Series • Introduction
DA AV EQ Series • Introduction
1-3
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Introduction, cont’d
Application diagrams
DA AV EQ Series
The connection diagrams below show examples of how devices
may be connected to the DA AV EQ Series distribution
amplifiers.
VCR
6' Cables
DVD
EQ
V
A
6
A
D
S
T
R
R
U
P
5
T
U
L
L
O
R
6
3
L
L
Sound Systems
100' Cables
R
4
R
R
1
2
T
R
U
L
L
P
IN
S
T
U
P
T
U
6
O
T
4
U
2
P
IN
A
.2
0
V
0
4
2
-
0
0
1
I
H
T
-
H
P
O
O
L
m
DA 6AV EQ
Audio Video
Distribution
Amplifier
z
H
0
/6
0
5
800'
Cables
Projector
Chapter Two
Plasma
Displays
Monitor
(Loop-through)
1000'
Cables
2
Example of devices connected to a DA 6AV EQ
DVD
Installation and Rear Panel
A
RC
V
A
3
DA
UTS
OUTP
T
INPU
Mounting the DA AV EQ Series
Rear Panel Features and Cabling
Setting the Audio Output Gain
L
R
3
UTS
OUTP
INPUT
A
.2
0
1
V
0
4
-2
0
0
1
H
P
O
O
L
m
h
O
z
H
0
/6
0
5
DA 3AV RCA
Audio Video
Distribution
Amplifier
100'
Cables
200'
Cables
Projector
HDTV
Plasma
Displays
300'
Cables
Monitor
(Loop-through)
Example of devices connected to a DA 3AV RCA
1-4
DA AV EQ Series • Introduction
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Installation and Rear Panel
3.
4.
Mechanical loading — Mount the equipment in the rack
so that a hazardous condition is not achieved due to
uneven mechanical loading.
Mounting the DA AV EQ Series
The DA AV EQ distribution amplifiers can be set on a table;
mounted on a rack shelf; or mounted through or under a desk,
podium, or tabletop.
Circuit overloading — Connect the equipment to the
supply circuit and consider the effect that circuit
overloading might have on overcurrent protection and
supply wiring. Appropriate consideration of equipment
nameplate ratings should be used when addressing this
concern.
The following optional mounting kits are available for the
DA AV EQ Series:
•
•
RSB 126 1U, 6" deep basic rack shelf (part #60-604-10)
RSU 126 1U, 6" deep universal rack shelf kit
(part #60-190-10)
5.
Reliable earthing (grounding) — Maintain reliable
grounding of rack-mounted equipment. Pay particular
attention to supply connections other than direct
connections to the branch circuit (e.g., use of power strips).
•
•
RSB 129 1U, 9.5" deep basic rack shelf (part #60-604-01)
RSU 129 1U, 9.5" deep universal rack shelf kit
(part #60-190-01)
Rack mounting procedure
To mount the distribution amplifier on a 6" deep or 9.5" deep
rack shelf,
•
MBU 125 under-desk mounting bracket kit
(part #70-077-01)
1.
If rubber feet were previously attached to the bottom of
the unit, remove them.
•
MBD 129 through-desk mounting bracket kit
(part #70-077-02)
2.
Mount the unit on the rack shelf, using two 4-40 x 3/16"
screws in opposite (diagonal) corners to secure it.
Tabletop use
3.
4.
Install blank panel(s) or other unit(s) on the rack shelf.
Attach the rack shelf to the rack using the supplied bolts.
Four self-adhesive rubber feet are included with the unit. For
tabletop use, affix one foot at each corner of the bottom of the
DA, and place the unit in the desired location.
6" Deep Rack Shelf
1/2 Rack Width Front False
Faceplate
Rack mounting
UL rack mounting requirements
The following Underwriters Laboratories (UL) requirements
pertain to the safe installation of the equipment in a rack.
1.
Elevated operating ambient temperature — If the
equipment is installed in a closed or multi-unit rack
assembly, the operating ambient temperature of the rack
environment may be greater than room ambient
temperature. Therefore, install the equipment in an
environment compatible with the maximum ambient
temperature (Tma = +113 °F, +45 °C) specified by Extron.
Front false
faceplate
uses 2
screws.
2.
Reduced air flow — Install the equipment in a rack so that
the amount of air flow required for safe operation of the
equipment is not compromised.
(2) 4-40 x 3/16"
Screws
Use the 2 mounting holes on
opposite corners.
Mounting a DA AV EQ on a 6" deep rack shelf
DA AV EQ Series • Installation and Rear Panel
2-2
DA AV EQ Series • Installation and Rear Panel
2-3
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Installation and Rear Panel, cont’d
To mount the DA AV EQ under a desk, podium, or table top,
1U Universal Rack Shelf
1.
2.
3.
If rubber feet were previously attached to the bottom of
the unit, remove them.
1/2 Rack Width Front False
Faceplate
Remove the two screws from one side of the unit. Retain
the screws for possible later reassembly.
Attach one bracket to the side of the unit, using the
provided machine screws.
4.
5.
Repeat steps 2 and 3 on the other side of the unit.
Front false
faceplate
uses 2
Hold the DA with the attached brackets against the
underside of the table or other furniture. On the mounting
surface, mark the location of the bracket’s screw holes.
screws.
6.
Drill pilot holes 1/4" (6.4 mm) deep and 3/32" (2 mm) in
diameter into the table or desk top at the marked screw
locations. The holes should be drilled from the underside
or inside (concealed side) of the furniture where the
amplifier will be located.
(2) 4-40 x 3/16"
Screws
Using screws
longer than 3/16” will
damage the unit and
void the warranty.
7.
8.
9.
Insert #8 wood screws into the four pilot holes. Tighten
each screw into the mounting surface until slightly less
than 1/4" of the screw head protrudes.
Use the 2 mounting holes on
opposite corners.
Mounting a DA AV EQ on a 9.5" deep rack shelf
Align the mounting screws with the slots in the brackets
and place the unit against the surface, with the screws
through the bracket slots.
Furniture mounting
Furniture-mount the DA AV EQ under a desk or shelf using the
optional mounting kit (part #70-077-01), as illustrated below.
Slide the unit slightly forward or back, then tighten all
four screws to secure it in place.
Under-desk mounting the DA AV EQ
DA AV EQ Series • Installation and Rear Panel
2-5
2-4
DA AV EQ Series • Installation and Rear Panel
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Installation and Rear Panel, cont’d
c.
Tighten the screws.
Through-desk mounting
d.
Replace the DA inside the surface (repeat step 4).
Mount the DA AV EQ through a desk or table, using the
optional through-desk mounting kit (part #70-077-02).
Rear Panel Features and Cabling
The following diagrams show the rear panel configurations of
the 10 models in the DA AV EQ series.
12
100-240V
0.2A
OUTPUTS
3
INPUT
1
2
5
6
HIGH Z
75 Ohm
4
LOOP-THRU
50/60 Hz
1
2
4
6
DA 6V EQ rear panel
12
100-240V
0.2A
OUTPUTS
3
INPUT
INPUT
OUTPUTS
1
2
5
L
L
R
R
L
L
R
L
L
R
R
1
2
3
4
5
HIGH Z
75 Ohm
L
R
R
6
Through-desk mounting the DA AV EQ
4
6
LOOP-THRU
50/60 Hz
1.
2.
3.
Mark the opening through which the unit will be
mounted — approximately 1.8" by 8.9" (4.6 cm by 22.6 cm).
1
2
4
6
8
10
Cut out the material from the installation area with a
jigsaw.
DA 6AV EQ rear panel
Drill pilot holes 1/4" (6.4 mm) deep and 3/32" (2 mm) in
diameter in the desk or table at the locations of the
mounting bracket screws. The holes should be drilled
from the underside or inside (concealed side) of the
furniture where the amplifier will be located.
12
100-240V
0.2A
OUTPUTS
3
OUTPUTS
INPUT
L
INPUT
1
2
5
4.
5.
Using the four provided wood screws, attach the brackets
to the mounting surface.
HIGH Z
75 Ohm
R
1
2
3
4
5
6
4
6
LOOP-THRU
50/60 Hz
Slide the unit up and down or back and forth in the
mounting brackets until the face of the DA is at the desired
height. Tighten the screws that secure the bracket in place.
2
4
9
1
6
11
If the screws are inaccessible to a screwdriver,
DA 6AV RCA EQ rear panel
a.
Mark the location of the brackets relative to the
screws.
b.
Remove the DA from inside the furniture.
2-7
2-6
DA AV EQ Series • Installation and Rear Panel
DA AV EQ Series • Installation and Rear Panel
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Installation and Rear Panel, cont’d
13
12
100-240V
0.2A
OUTPUTS
3
100-240V
0.2A
INPUT
OUTPUTS
2
INPUT A
1
3
4
1
5
1 x 8
HIGH Z
LOOP-
THRU
75 Ohm
LOOP-THRU
2
4
6
Dual
1 x 4
7
5
6
8
50/60 Hz
50/60 Hz
INPUT B
4
7
1
3
1
2
5
6
or
DA 6SV EQ rear panel
12
DA 8V/4V Dual EQ rear panel
13
100-240V
0.2A
OUTPUTS
3
INPUT
12
INPUT
OUTPUTS
L
L
R
R
L
L
R
L
L
R
R
1
5
1
2
3
4
5
100-240V
0.2A
INPUT A
OUTPUTS
3
HIGH Z
75 Ohm
L
R
R
6
2
4
6
1
2
4
5
6
50/60 Hz
LOOP-THRU
1 x 12
LOOP-
THRU
Dual
1 x 6
9
7
8
10
11
12
50/60 Hz
INPUT B
1
3
10
4
7
8
DA 6SVA EQ rear panel
1
2
6
5
or
100-240V
0.2A
12
INPUT
OUTPUTS
L
L
R
R
L
L
R
L
L
R
R
1
2
3
4
5
DA 12V/6V Dual EQ rear panel
L
R
R
6
50/60 Hz
12
100-240V
0.2A
INPUT
OUTPUTS
INPUT
1
10
8
L
OUTPUTS
2
HIGH Z
75 Ohm
DA 6A rear panel
R
1
2
3
1
3
LOOP-THRU
50/60 Hz
13
1
2
4
6
9
11
100-240V
0.2A
OUTPUTS
3
INPUT
OUTPUTS
INPUT
1
2
5
DA 3AV RCA rear panel
L
HIGH Z
R
1
2
3
4
5
6
75 Ohm
LOOP-THRU
4
6
50/60 Hz
AC power connector — Plug a standard IEC power cord into
this male connector to connect the distribution amplifier to a
100 to 240 VAC, 50 Hz or 60 Hz power source.
1
1
3
4
9
11
7
DA 6SVA RCA EQ rear panel
2-9
2-8
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Passive Loop-Thru connector (composite video) — (All models
except DA 6A and the three S-video models) Connect a monitor
to this female BNC video loop-through connector.
Audio input (RCA) — Connect an unbalanced audio input
source to these female RCA connectors. (See the diagram
below.)
2
9
This connector functions as an input on the DA 12V/6V
and 8V/4V Dual EQ models when they are operating in
Dual mode.
Tip (+)
Passive Loop-Thru connector (S-video) — (DA 6SV EQ,
DA 6SVA EQ, and DA 6SVA RCA EQ only) Connect a monitor to
this female 4-pin mini DIN video loop-through connector.
3
Sleeve (
)
RCA plug diagram
Termination toggle switch — (All models except DA 6A,
DA 12V/6V Dual EQ, and DA 8V/4V Dual EQ) Set this switch
to High Z (up) if a monitor is plugged into the passive
Loop-Thru connector. Set the switch to 75 Ohm (down) to
simulate a monitor when none is attached to the Loop-Thru
connector.
4
Audio outputs — Connect speakers to these 5-pole captive
screw connectors. Wire the captive screw connectors for stereo
output as shown in the following diagram.
10
Tip
NO GROUND HERE
Sleeves
Tip
Ring
Sleeves
Tip
Dual mode toggle switch — (DA 12V/6V Dual EQ and
DA 8V/4V Dual EQ only) Use this switch to toggle between
operating modes.
5
Tip
NO GROUND HERE
Ring
•
DA 12V/6V EQ: Switches between operating as one
1-input, 12-output DA with active loop-out (up), and two
1-input, 6-output DAs (down).
Balanced Output
Unbalanced Output
CAUTION
•
DA 8V/4V EQ: Switches between operating as one
1-input, 8-output DA with active loop-through (up), and
two 1-input, 4-output DAs (down).
For unbalanced audio, connect both sleeves
to the center contact ground. DO NOT connect
the sleeves to the negative (-) contacts.
Do not tin the wires!
Video outputs 1-6 (composite video) — Connect output
monitors, projectors, and/or other devices to these female BNC
connectors.
6
7
8
Wiring the captive screw audio output connectors
Audio outputs (RCA) — Connect speakers to these RCA
connectors. (See the plug diagram under , above.)
11
12
13
Video outputs 1-6 (S-video) — Connect output monitors,
projectors, and/or other devices to these female 4-pin mini DIN
connectors.
i
Video input (composite video) — Connect a composite video
source to this female BNC connector.
Audio input — Connect an audio input source to this female
5-pin captive screw connector.
Video input (S-video) — Connect an S-video source to this
female 4-pin mini DIN connector.
Tip
Sleeve
Tip
Ring
Sleeves
Tip
Ring
Tip
Sleeve
Balanced Stereo Input
Unbalanced Stereo Input
Wiring the captive screw audio input connectors
2-11
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DA AV EQ Series • Installation and Rear Panel
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Setting the Audio Output Gain
On the DA 6SVA EQ, DA 6AV EQ, and DA 6A audio models,
you can set the gain for the left and right channels
independently.
This applies only to models with captive screw audio
connectors.
On the internal board, each audio output has a set of jumpers
(one left and one right). By placing these jumpers on the
appropriate pins on the board, you can set the gain for each
channel to -6 dB, 0 dB, +6 dB, or unity, depending on whether
the output is wired for balanced or unbalanced audio.
To set the gain for an output channel using the internal jumpers,
1.
Using an Extron Tweeker or other small Phillips
screwdriver, remove the six screws from the sides and top
of the unit, and carefully lift off the top cover.
R
E
I
IF
L
P
M
A
N
O
I
T
U
B
I
R
T
S
I
D
/V
A
/6
Q
C
5
IN
A
G
Y
E
IN
A
G
/4
Q
C
3
IN
A
G
Y
E
IN
A
G
/2
Q
C
1
IN
A
G
Y
E
IN
A
G
Jumpers on the internal board in their default
(balanced) position
Remove 6 screws.
Removing the top cover from the DA
To change any output channel to unbalanced audio, lift the
jumper off the middle and right pins, and place it on the
left and middle pins, as shown in the following
illustration.
2.
By default, all jumpers are on the middle and right pins for
each output’s right and left channel — the configuration
for balanced audio. (See the photograph on the next page.)
Unbalanced audio
Balanced audio
(default)
Output gain jumper positions for balanced and
unbalanced audio
3.
Repeat step 2 for each output channel that you want to set.
2-13
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The following table shows the resulting gain levels for each
possible jumper position and balanced/unbalanced wiring
combination.
DA AV EQ Series
Jumper
Position
Balanced
(Jumper on right
and middle pin)
Unbalanced
(Jumper on left
and middle pin)
Output
Wiring
Balanced
Unbalanced
0 dB
+6 dB
0 dB
-6 dB
For example, if you wire output 1 as an unbalanced audio and
you place the jumpers for both channels on the left and middle
pins, the gain is 0 dB.
Chapter Three
3
Front Panel Features and
Operation
Front Panel Features
Gain and Equalization Controls
2-14
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Front Panel Features and Operation
Front Panel Features
1/2
GAIN EQ
The following diagrams show the five different front panel
configurations of the DA AV EQ series.
3/4
GAIN
5/6
GAIN
7/8
GAIN
9/10
GAIN EQ
11/12
GAIN EQ
EQ
EQ
EQ
VIDEO DISTRIBUTION AMPLIFIER
1
2
1/2
GAIN EQ
3/4
GAIN EQ
5/6
GAIN EQ
DA 6V/12V Dual EQ front panel
A/V DISTRIBUTION AMPLIFIER
4
4
4
2
1
DA 6AV EQ, DA 6AV RCA EQ, and DA 6V EQ front
panel
1/2
3/4
5/6
Y
C
Y
C
Y
C
GAIN EQ GAIN
GAIN EQ GAIN
GAIN EQ GAIN
A/V DISTRIBUTION AMPLIFIER
1
3
3
3
AUDIO DISTRIBUTION AMPLIFIER
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ
front panel
1
DA 6A and DA 3AV RCA front panel
Power indicator LED — This green LED lights when the
distribution amplifier is receiving power.
1
2
The above illustration shows the DA 6A front panel.
The DA 3AV RCA front panel is identical except that it
is identified in the lower-right corner as “A/V
Distribution Amplifier.”
Gain and EQ potentiometers — (Composite video models; one
set for each pair of outputs) Use an Extron Tweeker or a small
Phillips screwdriver to rotate these potentiometers to adjust for
gain and equalization (EQ) for connected devices with long
cables.
Gain and EQ potentiometers (luma) — (SV and SVA EQ
models; one set for each pair of outputs) Use an Extron Tweeker
or a small Phillips screwdriver to rotate these potentiometers
(labeled with Y, above it) to adjust the luminance gain and
equalization (EQ) when devices with long cables are connected.
3
1/2
GAIN
3/4
GAIN
5/6
GAIN
7/8
GAIN EQ
EQ
EQ
EQ
VIDEO DISTRIBUTION AMPLIFIER
1
2
Gain potentiometer (chroma) — (SV EQ and SVA EQ models;
one for each pair of outputs) Use an Extron Tweeker or a small
Phillips screwdriver to rotate this potentiometer (labeled with
C, above it) to adjust the chroma gain.
4
DA 8V/4V Dual EQ front panel
3-3
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Gain and Equalization Controls
•
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ —
The front panels of these models each contain one Y Gain,
one Y EQ, and one C Gain potentiometer for each pair of
outputs. The illustration below shows the Y Gain, EQ,
and C Gain potentiometers for outputs 1 and 2.
To set up your DA AV EQ, you may need to adjust the gain and
equalization (EQ) for the output cable lengths. Gain and EQ are
adjusted from the front panel of all DA AV EQ series products
except the DA 6A and DA 3AV RCA. On S-video models, you
can adjust luma (Y) gain and equalization, and chroma (C) gain.
On composite video models, you can adjust Gain and EQ.
Adjustments are made for each pair of outputs.
Output Pair
1/2
Gain and EQ potentiometers (pots) on the front panels enable
you to make gain and equalization adjustments. Each pot has a
white dot either above it (composite and Y gain) or to the lower
left of it (EQ and C gain). These dots indicate 0 dB unity.
Y
C
GAIN EQ GAIN
0 dB Indicator Dot
Luma (Y) Gain Pot
0 dB Indicator Dot
Chroma Gain Pot
Use an Extron Tweeker or a small Phillips screwdriver to rotate
these pots clockwise to increase gain or equalization, or
counterclockwise to decrease.
Arrow
Arrow
The DA AV EQ products have one EQ pot and one or two Gain
pots for each pair of outputs. Therefore, gain and equalization
can be adjusted only for a pair of outputs at a time. For
example, if you adjust the equalization pot for output 1,
output 2 is automatically adjusted at the same time and by the
same amount, .
Equalization (EQ) Pot
(for Luma [Y])
Luma and chroma Gain and EQ potentiometers for
an output pair
Settings for short cables
This means that you should have cables of the same
length for both outputs of a pair.
At the factory, the DA AV EQ pots are set precisely to the unity
gain position (with the arrow on the pot pointing to the dot
beside or above it). If you are using very short output cables, do
not turn these pots; leave them at the factory default setting. If
the pots have already been turned, reset them to the default
position. The illustration below shows outputs 1 and 2 set to
the unity gain position.
•
DA 6V EQ, DA 6AV EQ, DA 6AV EQ RCA,
DA 8V/4V Dual EQ, and DA 12V/6V Dual EQ — The
front panels of these models feature one Gain and one EQ
pot for each pair of outputs. The illustration below
shows the Gain and EQ pots for outputs 1 and 2.
Output Pair
1/2
GAIN EQ
1/2
Y
C
GAIN EQ GAIN
1/2
GAIN EQ
Composite Video Models
S-video Models
0 dB Indicator Dot
Potentiometers for outputs 1 and 2 at unity gain
settings
Gain Pot
Equalization (EQ) Pot
Arrow
Arrow
0 dB Indicator Dot
Gain and EQ potentiometers for an output pair
DA AV EQ Series • Front Panel Features and Operation
3-4
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Front Panel Features and Operation, cont’d
Adjusting for long cables
DA AV EQ Series
If you are using long cables, you need to adjust the Gain and EQ
potentiometers (pots) until you have the best picture quality.
Using an oscilloscope is recommended; however, you can make
these adjustments without one. Both methods are described
below.
Adjusting with an oscilloscope
1.
2.
3.
Feed a grayscale signal from an Extron VTG 300/400 or
other A/V test generator to the input of the DA AV EQ.
Remove the far end of the output cable from the display,
and connect it to the oscilloscope with 75 ohm termination.
Adjust the composite video or Y Gain pot to achieve
0.7 Vp-p for the white bar of the test pattern. For the
S-video models, adjust the C gain pot to achieve 0.3 Vp-p
of color burst level.
4.
Adjust the EQ pot until no overshooting or round corners
appear on the test pattern.
5.
Repeat steps 1 through 4 for all other output pairs.
Appendix A
6.
Plug the far end of the cable back into the display device.
Adjusting without an oscilloscope
A
1.
Feed a grayscale signal from an Extron VTG 300/400 or
other A/V test generator to the input of the DA AV EQ.
2.
Adjust the composite video or Y Gain pot until the picture
from the display device appears to have the correct
brightness and contrast.
Specifications, Parts, and
Accessories
3.
Adjust the EQ pot until the picture appears sharp and
without visible smearing.
4.
Repeat steps 1 through 3 for all other output pairs.
Specifications
Models
Included Parts
Optional Accessories
Cables
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Specifications, Parts, and Accessories
Specifications
Minimum/maximum levels
Composite video or Y signal
0.4 V to 2.0 Vp-p with no offset at unity
gain
Video
Gain (all models except DA 6A and DA 3AV RCA)
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ
Y: 0.4 V to 2.0 Vp-p with no offset at unity
gain
Video and Y ...................... -1 dB to +3 dB (x 0.9 to x 1.4), adjustable
per every 2 outputs
C (chroma) ........................ 0 dB to +10 dB (x 1 to x 3), adjustable for
DA 6SV EQ, DA 6SVA EQ, and
Impedance
DA 6SVA RCA EQ
Equalization (all models except DA 6A and DA 3AV RCA)
0 dB to +6 dB (x 1 to x 2) at 5 MHz,
adjustable per every 2 outputs
Bandwidth .................................... 150 MHz (-3 dB)
DA 8V/4V Dual EQ and DA 12V/6V Dual EQ
75 ohms
All other models .............. 75 ohms or Hi-Z, selectable
Return loss .................................... -30 dB @ 5 MHz
DC offset (max. allowable) ......... 4.0 V, AC coupled
Output cable driving distance ... Up to 1000 feet with Mini HR cable
Up to 1500 feet with RG6 or RG59 cables
Video output
Number/signal type
Video input and loop-through
Number/signal type
DA 6V EQ, DA 6AV EQ, and DA 6AV RCA EQ
6 composite video
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ
6 S-video
DA 6V EQ, DA 6AV EQ, DA 6AV RCA EQ, and DA 3AV RCA
1 composite video input, 1 composite
video passive loop-through
DA 12V/6V Dual EQ ...... 12 composite video
DA 8V/4V Dual EQ ........ 8 composite video
DA 3AV RCA ................... 3 composite video
Connectors
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ
1 S-video, 1 S-video passive loop-through
DA 12V/6V Dual EQ and DA 8V/4V Dual EQ
1 composite video and 1 buffered loop-
DA 6V EQ, DA 6AV EQ, and DA 6AV RCA EQ
6 female BNC
through or 2 composite video
Connectors
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ
6 female 4-pin mini DIN
DA 12V/6V Dual EQ ...... 12 female BNC
DA 8V/4V Dual EQ ........ 8 female BNC
DA 3AV RCA ................... 3 female BNC
DA 6V EQ, DA 6AV EQ, DA 6AV RCA EQ, and DA 3AV RCA
1 female BNC (input), 1 female BNC
(loop-through)
DA 6SV EQ, DA 6SVA EQ, and DA 6SVA RCA EQ
1 female 4-pin mini DIN (input) and
1 female 4-pin mini DIN (loop-through)
Nominal level ............................... 1 Vp-p for composite video and for Y of
DA 12V/6V Dual EQ ...... 2 female BNC
DA 8V/4V Dual EQ ........ 2 female BNC
S-video
0.3 Vp-p for C of S-video
Minimum/maximum levels ...... 0.4 V to 2.0 Vp-p
Impedance .................................... 75 ohms
Return loss .................................... -30 dB @ 5 MHz
Nominal level ............................... 1 Vp-p for composite video and for Y of
S-video
0.3 Vp-p for C of S-video
Sync
Standards ...................................... NTSC 3.58, NTSC 4.43, PAL, SECAM
A-3
DA AV EQ Series • Specifications, Parts, and Accessories
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Specifications, Parts, and Accessories, cont’d
Audio output
Audio
Number/signal type
Gain ............................................... Unity when internal jumpers are set to
match output wiring. See table below for
other conditions.
DA 6AV RCA EQ and DA 6SVA RCA EQ
6 stereo, unbalanced
DA 3AV RCA ................... 3 stereo, unbalanced
DA 6A, DA 6AV EQ, and DA 6SVA EQ
Jumper
Position
Balanced
(Jumper on right
and middle pin)
Unbalanced
(Jumper on left
and middle pin)
Output
Wiring
6 stereo, balanced/unbalanced
Connectors
DA 6AV RCA EQ and DA 6SVA RCA EQ
6 pairs of female RCA jacks
Balanced
Unbalanced
0 dB
+6 dB
0 dB
-6 dB
Frequency response..................... 20 Hz to 20 kHz, 0.08 dB (with voltage
reference @ 1 kHz)
DA 3AV RCA ................... 3 pairs of female RCA jacks
DA 6A, DA 6AV EQ, and DA 6SVA EQ
THD + Noise ................................ 0.03% @ 1 kHz at nominal level
S/N (at any output)..................... >90 dB, unbalanced, at maximum output
(unweighted)
(6) 3.5 mm captive screw connectors,
5 pole
Impedance
Stereo channel separation .......... >80 dB @ 1 kHz; >60 dB @ 20 kHz
CMRR ............................................ >75 dB @ 20 Hz to 20 kHz
Output cable driving distance ... Up to 1000 feet with STP 22 cable
RCA models ..................... 50 ohms unbalanced
DA 6AV EQ, DA 6SVA EQ, and DA 6A
50 ohms unbalanced, 100 ohms balanced
Maximum level (Hi-Z)
Audio input
Number/signal type
RCA models ..................... >+18 dBu, unbalanced at 1% THD+N
DA 6A, DA 6AV EQ, and DA 6SVA EQ
RCA models ..................... 1 stereo, unbalanced
DA 6A, DA 6AV EQ, and DA 6SVA EQ
1 stereo, balanced/unbalanced
>+24 dBu, balanced at 1% THD+N
Maximum level (600 ohm)
DA 6A, DA 6AV EQ, and DA 6SVA EQ
>+15 dBm, balanced at 1%THD+N
Connectors
RCA models ..................... 1 pair female RCA
DA 6A, DA 6AV EQ, and DA 6SVA EQ
(1) 3.5 mm captive screw connector, 5 pole
Impedance
General
Power............................................. 100 VAC to 240 VAC, 50/60 Hz, 8 watts,
internal
Temperature/humidity .............. Storage: -40 to +158 °F (-40 to +70 °C) /
10% to 90%, noncondensing
RCA models ..................... 18 k ohms, unbalanced, DC coupled
DA 6A, DA 6AV EQ, and DA 6SVA EQ
18 k ohms unbalanced,
>24k ohms balanced, DC coupled
Nominal level ............................... Compatible with +4 dBu (1.23 Vrms),
0 dBu (0.775 Vrms), -10 dBV (316 m Vrms),
-20 dBV (100 m Vrms)
Operating: +32 to +122 °F (0 to +50 °C) /
10% to 90%, noncondensing
Rack mount................................... Yes, with optional 1U, 9.5" deep rack shelf,
part #60-190-01 (RSU 129) or 60-604-01
(RSB 129); or 1U, 6" deep rack shelf,
part #60-190-10 (RSU 126) or 60-604-10
(RSB 126)
Also furniture mountable with an optional
Under-Desk Mounting Kit, #70-077-01, or
Through-Desk Mounting Kit, #70-077-02
Maximum level
RCA models ..................... +18 dBu, (unbalanced) at 1% THD+N
DA 6A, DA 6AV EQ, and DA 6SVA EQ
+24 dBu, (balanced) at 1%THD+N
Enclosure type.............................. Metal
0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu
DA AV EQ Series • Specifications, Parts, and Accessories
DA AV EQ Series • Specifications, Parts, and Accessories
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Specifications, Parts, and Accessories, cont’d
Enclosure dimensions ................. 1.7" H x 8.7" W x 6.0" D
(1U high, half rack wide)
Included Parts
These items are included in each order for a DA AV EQ:
4.3 cm H x 22.1 cm W x 15.2 cm D
(Depth excludes connectors.)
Included part
Part number
Cooling .......................................... Convection, unvented
Product weight............................. 2 lbs (0.9 kg)
Shipping weight........................... 4 lbs (2 kg)
Vibration ....................................... ISTA 1A in carton (International Safe
Transit Association)
IEC power cord
5-pin 3.5 mm captive screw connectors (7)
(DA 6AV EQ, DA 6SVA EQ, and DA 6A)
10-10-319
Tweeker (small screwdriver)
Rubber feet (not attached)
DA AV EQ Series User’s Manual
Listings .......................................... UL, CUL
Compliances ................................. CE, FCC Class A, VCCI, AS/NZS, ICES
MTBF ............................................. 30,000 hours
Warranty ....................................... 3 years parts and labor
All nominal levels are at 10%.
Optional Accessories
These items can be ordered separately:
Specifications are subject to change without notice.
Accessory
Part number
Models
RSU 129 1U, 9.5" Deep Universal Rack
Shelf Kit
60-190-01
Model
Part number
RSB 129 1U, 9.5" Deep Basic Rack Shelf
60-604-01
60-190-10
DA 6V EQ
60-692-01
60-692-21
60-692-31
60-692-02
60-692-22
60-692-32
60-692-20
60-693-01
60-694-01
60-695-31
RSU 126 1U, 6" Deep Universal Rack Shelf
Kit
DA 6AV EQ
DA 6AV RCA EQ
DA 6SV EQ
RSB 126 1U, 6" Deep Basic Rack Shelf
MBU 125 Under-desk Mount Kit
MBU 129 Through-desk Mount Kit
60-604-10
70-077-01
70-077-02
DA 6SVA EQ
DA 6SVA RCA EQ
DA 6A
DA 8V/4V Dual EQ
DA 12V/6V Dual EQ
DA 3AV RCA
DA AV EQ Series • Specifications, Parts, and Accessories
DA AV EQ Series • Specifications, Parts, and Accessories
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Specifications, Parts, and Accessories, cont’d
Cables
The following cables can be ordered as needed:
Cable
Part number
MHR-2 SVM-M Male to Male 4-pin
Mini DIN S-Video Cables (S-video
models only)
26-316-xx
MHR-2P SVM-M Male to Male 4-pin
Mini DIN S-Video cables, plenum
(S-video models only)
26-522-xx
RG6 BNC Series BNC Male to Male Single
Conductor SHR cables
26-383-xx
26-575-01
IN87xx
CSR 6 Captive Screw to RCA Female
Audio Adapter (audio models only)
RCA Male to Male Stereo Audio cable
(audio models only)
A-8
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