Key Digital Xplosion Series KD-SCDA8 User manual

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It is suggested that all users always check our web site for the latest version
of this Users Manual at www.keydigital.com under Literature, User Manuals.
OPERATING INSTRUCTIONS
Model KD-SCDA8
The KD-SCDA8 Distribution Amplifier (DA) by Key Digital:
- Provides economical signal distribution from any one (1) Composite Video (CV) and S-Video source,
to up to eight (8) independent Composite Video and S-Video destinations
- Distributes analog (Left and Right stereo pair) or digital PCM audio
- Provides a convenient A/V and power input/output Throughput for ease of daisy-chaining the input to
another device; or you can use the Throughput as an additional DA output, bringing the total outputs
to nine (9)
- Simultaneously distributes Composite Video, S-Video, and Audio
- Drives cable runs up to 300 feet long with crystal-clear quality
- Is easily cascaded to other KD-SCDA8 units, thereby permitting the installer to drive as many outputs
as desired from one source, without any appreciable signal degradation
An 8-Channel Output Composite Video and S-Video
Distribution Amplifier (DA) with analog or digital PCM
audio, and throughput output for daisy-chaining

INCLUDED WITH YOUR DISTRIBUTION AMPLIFIER
Open the carton and you will find the following contents inside:
KD-SCDA8 Distribution Amplifier unit
External Power Supply, rated for +5 Volts at 1.0 Amp
This Instruction Manual
Warranty Card
INTRODUCTION
The KD-SCDA8 Distribution Amplifier (DA) by Key Digitalprovides
economical signal distribution from any one (1) Composite Video
(CV) and one (1) S-Video source to up to eight (8) Composite Video
and eight (8) S-Video destinations. It also distributes analog (Left
and Right stereo pair) or digital PCM audio. Composite Video, S-Video,
and Audio can be distributed simultaneously, on cable runs up to 300
feet long.
A convenient A/V and power supply Throughput output permits daisy-
chaining the input to another device; or you can use the Throughput
as an additional DA output, bringing the total outputs to nine (9).
This gives you the capability to drive as many outputs as desired
from one source, without any appreciable signal degradation.
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HOW TO CONTACT KEY DIGITAL
Repairs and Warranty Service:
Should your KD-SCDA8 Automatic Switcher require warranty service, please contact Key Digitalfirst to
obtain a Returned Materials Authorization (RMA) number
Please contact us at either:
Toll-free 1-203-778-0295 extension 3#
email [email protected]
Technical Support:
For technical questions about using our products, please contact us at either:
1-203-778-0295 or Toll-free 1-888-258-2028
email [email protected]
Customer Support:
For customer support questions about using our products, please contact us at either:
1-203-778-0295
email [email protected]
WARRANTY
All Key Digitalproducts are built to high manufacturing standards and should provide years
of trouble-free operation. They are backed by a limited two-year parts and labor warranty.

Getting Started
First, understand the basic operation of the Distribution Amplifier.
The KD-SCDA8 Distribution Amplifier allows you to take a Composite
Video baseband signal, and/or an S-Video signal, and distribute it to
up to eight (8) separate destinations. The high-quality and state-of-
the-art electronic circuitry inside each Distribution Amplifier unit pro-
vides crystal-clear distribution from the source (Input) to up to eight
(8) or more destinations (up to 300 feet away). Of course, the signal
quality at the destination is always limited by the quality of your
input signal.
Your KD-SCDA8 Distribution Amplifier can simultaneously distribute
Composite Video and S-Video, because there are separate
Input/Output jacks for EACH format. Also, separate Left and Right
stereo analog audio jacks are provided, which allow you to drive one
input audio pair to up to eight (8) destinations. You may substitute
digital PCM audio for the Left and Right analog audio.
The unit runs on an external power supply, included with your unit.
An intelligent feature of your KD-SCDA8 Distribution Amplifier is the
“Throughput” output port. The “Throughput” output looks just like the
other eight (8) outputs from your DA — indeed it can be used as an
additional output, bringing the total distribution to nine (9) outputs.
However, if you need to “daisy-chain” (cascade) multiple Distribution
Amplifier units, then the “Throughput” output can be used as the
“Input” to the second KD-SCDA8 unit. You can cascade multiple units
this way, allowing you to distribute your signals to 16 or more desti-
nations. In addition, the power supply is also available as a
“Throughput” output (adjacent to the A/V output jacks), thereby
allowing you to use one heavy-duty power supply on the first KD-
SCDA8 unit, and feeding the power along with the “Throughput” A/V to
the daisy-chained units.
Setting Up Your Distribution Amplifier (“DA”) for Operation
The KD-SCDA8 Composite Video and S-Video Distribution Amplifier (DA)
is easy to configure and operate.
1. First, find a safe and convenient location for the DA. There
are flanges on each side of the metal case so the unit can be
bolted into position, if desired.
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Mounting Flanges

2. Connect the external 5 Volt DC supply into the DA. Run the
power cable safely to an appropriately-rated electrical outlet.
Use the 1 A supply (provided) for single-unit operation. Be
sure to use the 5 Amp, heavy-duty supply available from Key
Digital‚if you are daisy-chaining multiple KD-SCDA8 units.
3. Note that your KD-SCDA8 Distribution Amplifier has an
Audio/Video Input/Output Panel. For ease-of-use, each
Input/Output Group on the panel is configured the same:
•Three (3) color-coded, female RCA jacks, one each for:
-“CV” = Composite Video
-“L” = Left Analog Audio (or Digital PCM Audio)
-“R” = Right Analog Audio (or Digital PCM Audio)
•One (1) S-Video female jack
This panel is comprised of:
•ONE (1) Input Group, Audio, Video, and Power, labeled “Inputs”
•EIGHT (8) Output Groups, exactly the same configuration as the
Input A/V, labeled “1” through “8”
Color-coded female RCA jacks
S-Video
External +5V Power Supply In
CV = Composite Video
L= Left Analog Audio, or Digital PCM Audio
R= Right Analog Audio, or Digital PCM Audio
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•“Throughput” and power supply drive Outputs, exactly the same
as the Input/Output A/V, can be used to daisy-chain to
additional Distribution Amplifier unit’s input (also supplies
power), or as a ninth DA output
4. Determine your configuration Input requirements:
•Run the A/V Inputs to the DA: you can simultaneously input
Composite Video, S-Video, Left and Right Analog Audio or Digital
PCM Audio
•You do not need to simultaneously utilize the Composite Video,
S-Video, and Audio inputs – simply use the format(s) you
require
•The inputs are terminated internally
5. Determine your configuration Output requirements:
•You have up to NINE (9) outputs available to drive your displays
or other destination devices
•You do not need to use all the outputs – simply use the number
and formats you need
•If you need more than nine (9) outputs, then you can use the
“Throughput” output to drive the input of a second KD-SCDA8
unit, and also feed forward the power (be sure to use a 5
Amp-rated input power supply, available separately from
Key Digital)
•Run the A/V Outputs from your DA: you can simultaneously
output Composite Video, S-Video, Left and Right Analog Audio or
Digital PCM Audio
•Cable runs can be up to 300 feet, without appreciable signal
loss
•Terminate appropriately at the end of each run
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TECHNICAL SPECIFICATIONS
An 8-Channel Output Composite Video and S-Video
Distribution Amplifier (DA) with analog or digital PCM
audio, and throughput output for daisy-chaining
General
• Model KD-SCDA8: 8-output Composite Video or S-Video, Analog (Left & Right) or
PCM Audio Distribution Amplifier (DA), with output Throughput feature
• “Plug and Play” – requires no configuration
• Enables simultaneous signal distribution from any Composite Video (CV) or S-
Video source:
-Composite Video (CV)
-S-Video
-Analog (standard line-type Left & Right pairs) or digital PCM Audio
• One unit can drive up to eight (8) independent devices:
-Composite Video (CV) and S-Video
-Output = Input
-Throughput can be used as additional output, to bring the total to nine (9)
output drives
• Also has a Throughput output:
-Can daisy-chain the analog video (Composite Video and S-Video) and analog
or digital audio inputs to another device via the Throughput
-Throughput can also serve as a ninth DA output
• Can be cascaded to other KD-SCDA8 DA’s to drive as many outputs as desired
from one source
• Can drive CV (Composite Video) and S-Video cables, up to 300 feet each
Inputs
• There is one (1) Input Group, consisting of Analog Video and Analog or Digital
Audio Inputs:
-1 x S-Video jack for S-Video analog video input
-1 x RCA jack for Composite Video (CV) analog video input
-2 x RCA jacks for audio input:
-standard line-type Left & Right analog pairs
-or use one jack for digital PCM audio
Outputs
• There are eight (8) Output Groups, eachOutput Group consisting of discrete
Analog Video and Analog or Digital Audio Outputs:
-1 x S-Video jack for S-Video analog video DA output
-1 x RCA jack for Composite Video (CV) analog video DA output
-2 x RCA jacks for audio DA output:
-standard line-type Left & Right analog pairs
-or use one jack for digital PCM audio
• Output = Input
• Can be cascaded to other KD-SCDA8 DA’s to drive as many outputs as desired
from one source
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Throughput
• There is one (1) Output Throughput:
-1 x S-Video jack for S-Video analog video
-1 x RCA jack for Composite Video (CV) analog video
-2 x RCA jacks for audio:
-standard line-type Left & Right analog pairs
-or use one jack for digital PCM audio
-Power supply connector, to feed power to the daisy-chained units [NOTE:
when daisy-chaining, you MUST use a 5 Volt, 5-Amp rated supply, available
from Key Digital, as the external power supply for the first unit in the daisy
chain]
• The Throughput can be used as follows:
Can daisy-chain the input to another device via the Throughput
Throughput Output can also serve as a ninth DA output
Signal Properties:
• Analog Video
-NTSC, PAL, SECAM, all world analog SD formats
-Composite Video (CV), and
-S-Video
-Bandwidth flat out to 110 MHz
• Audio
-Bandwidth flat 20 Hz to 50 MHz
-Analog (standard line-type Left & Right pairs), or
-Digital PCM on Left or Right
• Can drive CV (Composite Video) and S-Video cables, up to 300 feet each
Connectors
• Each Input (1 Input Group), Output (8 separate Output Groups), and Throughput
(1 Output Throughput Group) consists of:
-1 x S-Video jack for S-Video analog video input
-1 x color-coded RCA female jack for Composite Video (CV) analog video input
-2 x color-coded RCA female jacks for audio input:
-standard line-type Left & Right analog pairs
-or use one jack for digital PCM audio
• Other Connections:
-Standard power plug for external power supply input and throughput power
supply feed-forward output
Mechanical
• Easy to install and integrate — Custom Installer’s dream
• Cables attach to the I/O A/V panel
• Stand-alone or can be mounted with flanges (included)
• Size: 3” x 11.375” x 2.375” high
• Weight: 2.8 lbs.
• Enclosure type: Metal (no vents)
• Input Power: 5 Volt DC (external supply included, 110-240V AC, 50-60 Hz, 1.0 A)
NOTE: use a 5.0 A supply available from Key Digital, as the external power supply
when daisy-chaining
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KEY DIGITAL
COMPOSITE VIDEO AND S-VIDEO
DISTRIBUTION AMPLIFIER
MODEL KD-SCDA8
Safety Instructions – Please be sure to follow these instructions for
safe operation of your unit
******************************************************
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers)
that produce heat.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the
third prong are provided for your safety. If the provided plug
does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.
11. Only use attachments/accessories specified by the
manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table
specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-over.
13.Unplug this apparatus during lightning storms or when
unused for long periods of time.
14.Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid
has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped.
JUNE 2004