Key Digital Stereo Amplifier KD CDA3 User Manual

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KD-CDA3 Operating Instructions  
KD-CDA3  
HDTV Distribution Amplifier  
3-Channel Component Video & Audio Distribution Amplifier  
OPERATING INSTRUCTIONS  
Key Digital®, led by digital video pioneer Mike Tsinberg,  
develops and manufactures high quality, cutting-edge  
technology solutions for virtually all applications where  
high quality video imaging is important. Key Digital® is  
at the forefront of the video industry for Home Theater  
Retailers, Custom Installers, System Integrators,  
Broadcasters, Manufacturers, and Consumers. We  
provide total video system solutions because we  
know and help drive the technology, the industry, the  
business, and all the latest up-and-coming standards.  
But most of all, we know exactly what you need for  
your unique application – the right solution.  
The KD-CDA3 3-Channel HDTV Component Video & Audio Distribution Amplifier by Key  
Digital® is the perfect solution for small video and audio distribution applications. Convenient and prac-  
tical, the KD-CDA3 is the ideal choice for high-quality and economical 3-channel Analog signal distri-  
bution from any HDTV or SDTV Component Video (YPbPr) or RGBHV Video source including 1080p, as  
well as analog stereo or digital (PCM) Audio. It delivers crystal-clear, color-rich, artifact-free, and pristine  
HDTV and SDTV images to component HDTV-ready monitors in all video formats, including 1080p. The  
KD-CDA3 is the ideal product for driving your HD and SD sources to plasma displays, front and rear  
projectors, direct view monitors, and video walls; and can even be adapted for Composite Video and S-  
Video SDTV applications. The Output format and resolution = the Input format and resolution. Future-  
proof, expandable, 300 MHz Video bandwidth, the KD-CDA3 drives cables up to 300 feet. It is com-  
pact and rugged, and comes equipped with its own convenient mounting bracket. Only operate the  
KD-CDA3 with the Key Digital® external Power Supply provided with your unit.  
Phone :: 914-667-9700 Fax :: 914-668-8666  
Rev 0 - December 2005  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Safety Instructions – Please be sure to follow these  
instructions for safe operation of your unit  
1.  
Read these instructions.  
2.  
3.  
4.  
5.  
6.  
7.  
Keep these instructions.  
Heed all warnings.  
Follow all instructions.  
Do not use this apparatus near water.  
Clean only with dry cloth.  
Do not block any ventilation openings. Install in accordance with the manufacturers 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.  
Table of Contents  
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.  
Introduction.....................................................................................................2  
Getting Started................................................................................................6  
Connecting A/V Equipment to your Unit.............................................................8  
Troubleshooting...............................................................................................20  
Technical Specifications ..................................................................................24  
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.  
14.  
Unplug this apparatus during lightning storms or when unused  
for long periods of time.  
®
How to Contact Key Digital .............................................................................28  
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.  
© 2005 Key Digital Systems, Inc. All rights reserved.  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Typical source components you may need to distribute with your KD-CDA3 HDTV  
Distribution Amplifier can include the following:  
Introduction  
®
Key Digitals dedication to providing the best possible solution to the Home Theater  
DVD Players  
community is reflected in the KD-CDA3 HDTV Distribution Amplifier, manufactured  
under stringent quality control standards that exceed the industry norm. This com-  
mitment to quality, reliability and performance is reflected throughout the entire Key  
Electronic game boxes  
Cable TV, satellite and terrestrial DTV set-top receivers  
®
Digital product line. Every product is tested and certified by a limited warranty of  
Digital Video Recorders  
two years parts and labor, one of the best in the business. Please read the installa-  
tion instructions below and enjoy your Component Video/Audio Distribution Amplifier  
for years to come.  
D-VHS, S-VHS and VHS VCRs  
The KD-CDA3 HDTV Distribution Amplifier by Key Digital® provides convenience  
and economy for your small-scale professional Video/Audio distribution applications.  
Perfect for both the board room and home entertainment applications, this versatile  
component is the ideal complement to your video and audio equipment, making pos-  
sible the interface of your HDTV or SDTV source signals (Video and Audio) to as  
many as three (3) independent video displays. In addition, the KD-CDA3 HDTV  
Analog Distribution Amplifier can also switch PCM digital and/or left and right stereo  
Audio for as many input/output combinations. The interface is via the RCA type con-  
nector array, supporting Component Video (YPbPr) or “VGA(RGBHV) Video formats  
up to and including 1080P. The KD-CDA3 can even be adapted for Composite  
Video and S-Video SDTV applications.  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Technology  
Key Features  
®
As for all Key Digital products, its our custom technology that allows us to deliver  
the highest standard of picture quality, like:  
Your KD-CDA3 HDTV Distribution Amplifier enables 3-channel signal distribution from  
any HDTV or SDTV Component Video (YPbPr) or RGBHV Video source including  
1080p, to HDTV-ready displays. The KD-CDA3 distributes Video and analog stereo  
or digital (PCM) Audio with the crystal-clear images you’ve come to expect from Key  
LHBC (Linear High Bandwidth Circuit)  
Surface Mount Technology  
®
Digital .  
®
There is so much in store with Key Digitals new KD-CDA3 HDTV Distribution  
Amplifier:  
Multi-Layer Board Technology  
Pristine, crystal-clear distribution of ALL your HD and SD Analog sources, even  
1080p, out to 300 MHz:  
Component Video (YPbPr) or “VGA(RGBHV) Video  
- RGBHV installations preclude Audio distribution with your KD-CDA3 unit  
Digital PCM or analog stereo (Left & Right pairs) Audio  
RCA connectors  
Output video format & resolution = Input video format & resolution  
It is possible to substitute Composite Video (CVBS) or S-Video in place  
of the Component Video signals, using appropriate adapter cables  
Easy to set up and operate:  
Simply connect your source and displays, and you are up and running  
You must use the external Power Supply provided with your unit  
®
Expandable and cascadable with additional KD-CDA3 or other Key Digital HDTV  
Distribution Amplifiers  
Convenient mounting bracket provided for ease of installation  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
This KD-CDA3 HDTV Distribution Amplifier accepts virtually any Component Video  
input signal (YPbPr) with a matching left and right stereo audio pair (L&R audio can  
be substituted by a single digital PCM audio connection), and distributes it to up to  
three (3) Display devices around your home or showroom without the loss of signal  
quality. VGA-like video, called RGBHV, can be used in place of the Component  
Video and Audio. A typical hookup will consist of a “Source” device that outputs  
Component Video (or Composite Video or S-Video with optional video adapters) such  
as a DVD player, Set-Top Box unit, Satellite receiver, digital VCR, Sony-PlaystationÍ,  
XBOXÍ, GameCubeÍ or any other consumer video device.  
Getting Started  
The KD-CDA3 HDTV Distribution Amplifier is capable of distributing any Analog  
three-wire Component Video (YPbPr) and/or five-wire “VGAVideo (RGBHV) source,  
as well as analog/digital audio, to as many as three (3) outputs (typically your displays  
or projectors). If your source device output is on a VGA connector, you will need a  
breakout cable to RGBHV on separate RCA connectors; RGBHV installations pre-  
clude Audio distribution with your KD-CDA3 unit. Once configured, there are no con-  
trols to operate and the unit will be “transparent” to your entire installation or applica-  
tion. Its truly “configure and forget about it” - you are done.  
CAUTION: Always test all connections and final operation  
first, before sealing cables behind walls or completing diffi-  
cult wire routings. Since the KD-CDA3 HDTV Distribution  
Amplifier does NOT perform video processing, the output  
video format and resolution is the same as the input video  
format and resolution. This means that the video resolution  
is not changed and also that if you input one form of video,  
for example Component Video (YPbPr), the output will be in  
exactly the same format.  
Functionality of a Three-Channel Distribution Amplifier  
Video Display 1  
Component Video  
(YPbPr) Input  
PCM Digital Audio Input  
Three-Channel  
Video Display 2  
Component Video  
(YPbPr) Input  
DVD Player  
Component Video  
(YPbPr) Output  
Output A/V  
Analog HDTV  
PCM Digital Audio Input  
PCM Digital Audio  
Open the carton and you will find the following contents:  
Distribution Amplifier  
Video Display 3  
Component Video  
(YPbPr) Input  
1.  
One (1) KD-CDA3 HDTV Distribution Amplifier unit  
One (1) +5V DC external Power Supply adapter module*  
One (1) plastic mounting bracket  
2.  
3.  
3.  
4.  
PCM Digital Audio Input  
One (1) Operating Instructions Manual  
One (1) Warranty card  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
*Power Requirements  
External power supply  
CAUTION: When unpacking the unit, make all hookups and  
connections before plugging in the Power Adapter provided  
with your unit. Do NOT apply power to the unit until all Video  
and Audio connections have been made to your KD-CDA3  
unit from the “Source” device to the Display(s) and/or Audio  
system(s). You MUST use the Power Supply provided with  
your unit or you VOID the Key Digital® Warranty and risk  
damage to your unit and associated equipment.  
+ 5V DC, 110-120 VAC, 60 Hz (7 watts)  
CAUTION: No other power supply adapter can be used with  
the KD-CDA3 unit; you must use the Power Supply provided!  
Using a power supply other than the one provided by Key  
Digital® with your unit VOIDS THE WARRANTY, may cause  
damage to your unit and associated equipment, and is a  
potential safety hazard.  
You may wish to distribute the signal from your DVD Player, Video Game, Cable TV,  
Satellite and Terrestrial DTV set-top receiver, Digital Video Recorder, D-VHS, S-VHS, or  
VHS VCR “Source” to several Displays. Typical Application Examples of how you may  
use the KD-CDA3 HDTV Distribution Amplifier in your installation are shown here.  
Because not all consumer equipment marketed uses RCA connector interfaces, it  
may be necessary to employ BNC-to-RCA, VGA-to-RCA, and other adapter plugs  
and/or cable assemblies to interface these various devices to your KD-CDA3 HDTV  
Distribution Amplifier.  
CONNECTING A/V EQUIPMENT TO YOUR UNIT  
In this section, you will be instructed as to how to connect all of your A/V Input and  
Output devices to your KD-CDA3 HDTV Distribution Amplifier unit.  
Setting up your KD-CDA3 HDTV Distribution Amplifier for operation:  
Your KD-CDA3 HDTV Distribution Amplifier is easy to configure and operate. Simply  
connect your Input analog Video and analog or digital Audio source, and drive up to  
three (3) displays. For Component Video applications, you can also simultaneously  
drive your displays or Surround Sound processors with digital or analog Audio.  
There are no other controls, and no other setup is required other than supplying  
power to your unit with the Power Supply adapter provided with your unit.  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Typical Application Examples for the KD-CDA3 HDTV Analog A/V Distribution Amplifier  
High-quality Component Video (YPbPr) and “VGA” (RGBHV) Equipment  
Some of your Source equipment and Displays may have an analog video output that is  
called Component Video. Component Video is a three-wire video format, with the video  
signals typically labeled YPbPr. Another common analog video output format is RGB (like  
the “VGAoutputs on your computer), which typically has separate H&V sync signals.  
Display  
Display  
Display  
PCM Audio  
Pb  
Y
Pr  
PCM Audio  
Pr  
The KD-CDA3 HDTV Distribution Amplifier has one (1) bank of RCA-type Input connectors,  
and three (3) banks of RCA-type Output connectors. Each of the RCA connectors are color  
coded to match most “Source” and “Display” devices available in the consumer industry;  
Red, Green and Blue for Component Video; White, and Red for left and right audio respec-  
tively (PCM audio can be distributed by using either the left or right audio channel).  
Y
Pb  
Pb  
Y
Pr  
PCM Audio  
Pr  
Y
Pb  
PCM Audio  
KD-CDA3 HD Analog Component Video  
(YPbPr) and Digital PCM Audio One  
Source can drive up to THREE Displays  
Typical Connectors Color-code  
or  
HDTV Set Top Box  
DVD Changer  
Left & Right  
Analog Stereo  
Audio (L&R)  
Component Video  
(YPbPr)  
“VGA” Video  
(RGBHV)  
Digital PCM Audio  
Pr  
Red  
R
Red  
R
L
Red  
White  
PCM 1  
PCM 2  
Red**  
White**  
Display  
Display  
Display  
Display  
Display  
Display  
Display  
CVBS  
CVBS  
CVBS  
CVBS  
CVBS  
CVBS  
CVBS  
Y
Green  
Blue  
G
B
Green  
Blue  
Pb  
H =  
Horizontal  
Sync  
Red*  
V =  
Vertical  
Sync  
White  
Stereo System  
L&R Audio  
CVBS  
“Y” Out to Pr In  
“Y” Out to Pb In  
L&R Audio  
*Note: H Sync may also be Yellow on some Source and Sync products  
KD-CDA3 Distribution Amplifier for  
Composite Video. One Composite  
Video Source can drive up to  
**Note: These are the colors on the KD-CDA3 RCA connectors; however, the corresponding  
colors on your Source and Sink products may vary  
or  
VCR  
Video Camera  
SEVEN Composite Video Displays  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Be careful not to confuse the Red lead of a Component Video (YPbPr) cable with the  
Right or Red audio channel. To avoid confusion, note that the Red lead (Pr) from the  
Component Video cable is often bundled to the Green lead (Y) and Blue lead (Pb)  
from the component cable. Typically an analog Audio cable is comprised of a Right-  
channel stereo (Red-colored) connector together with a Left-channel stereo (White-  
colored) connector.  
Connect your COMPONENT VIDEO Source Input  
Before supplying power to your KD-CDA3 HDTV Distribution Amplifier unit, connect  
the Output of the Component Video Source device you wish to distribute to your dis-  
plays to the Inputs of KD-CDA3.  
Typically, connecting the KD-CDA3 HDTV Distribution Amplifier into your system is as  
simple as matching the proper color-coded connectors. When inserting the RCA con-  
nectors use a slight twisting motion when inserting the cables, this assures a proper  
connection by seating the RCA connector all the way in. Be sure to use high-quality  
75 Ohms cables for the video. When running long lengths of cable please make sure  
to use heavy shielded high quality cables.  
L&R Analog  
Audio  
Pr  
Y
Digital PCM  
Audio  
Pb  
Component  
Video Inputs  
Caution: For proper operation of the high quality electrical  
circuits in your KD-CDA3 unit, do NOT “daisy chain” Inputs:  
R
G
B
H
V
“VGAVideo Inputs  
Each Input of the KD-CDA3 has its own 75 Ohms termination  
The “Source” device Outputs should be connected to the jacks marked “Input” on the  
KD-CDA3. After hooking up the “Source” device to the marked input connectors, the  
KD-CDA3 will distribute the selected input signal to all of the output connectors.  
Do NOT feed a Source to multiple KD-CDA3 Inputs without  
proper Distribution equipment  
Note: Since the KD-CDA3 HDTV Distribution Amplifier does NOT perform video  
processing, the output video format is the same as the input video format. This  
means that the video resolution is not changed and also that if you input one form of  
video, for example Component Video, the output will be in exactly the same format.  
Alternate Video Inputs  
RGBHV  
RGBHV installations with separate H & V syncs preclude Audio distribution with your  
KD-CDA3 unit. Simply follow the labels on your KD-CDA3 and connect the RGB  
Video signals, and H&V Sync signals, accordingly. You may require breakout cables  
or adapters to the RCA Inputs of the KD-CDA3.  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
S-Video  
Connect your Output Displays  
For SDTV S-Video, simply follow the labels on your KD-CDA3 and connect the Y and  
color (chrominance) signals. Use the “Y” Input of the KD-CDA3 for the S-Video Y sig-  
nal. Note that if you may use either the Pr or Pb Input for the S-Video chrominance  
signal. However, be sure to correspondingly use the same (Pr or Pb) when driving  
your displays. For example, if you input the S-Video color signal on the Pr path, then  
you MUST use the Pr Outputs of the KD-CDA3 to drive your S-Video displays. You  
may require breakout cables or adapters to the RCA Inputs of the KD-CDA3.  
Now that the Video and Audio Inputs are connected to your KD-CDA3, run each of  
the individual set of Output connectors to their respective “Display” devices. The  
three (3) Output port banks are labeled Output 1, Output 2, and Output 3.  
Output 2  
Composite Video  
SDTV Composite Video, frequently called CV or CVBS, is a single-wire video format.  
You must use one of the three KD-CDA3 inputs for the Composite Video Input, and  
correspondingly use the same Output label to drive your Composite Video display.  
For example, use the “Y” Inputs and Outputs. This way, you will have three (3)  
Composite Video Outputs. You can achieve a higher level of CVBS distribution, for  
driving up to seven (7) Composite Video displays, by feeding back the KD-CDA3  
Outputs to the open KD-CDA3 Inputs. Refer to the Application Example for  
Composite Video provided later in this Operating Manual. You may require breakout  
cables or adapters to the RCA Inputs of the KD-CDA3.  
Output 3  
Output 1  
Input  
Always test all connections and final operation first, before sealing cables  
behind walls or completing difficult wire routings.  
Caution: For proper operation of the high-quality electrical  
circuits in your KD-CDA3 unit, you MUST ensure for each Output:  
Each run of YPbPr cable MUST be the same length  
Maximum run length = 300 feet  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Make sure to use the correct wires when making the connections to the “Display”  
device (use the color matching system if possible).  
You MUST use the Power Supply  
that came with your unit:  
+ 5V DC, 110-120 VAC, 60 Hz (7 watts)  
The same consideration applies to the audio interfaces. Both analog and digital out-  
put options are provided on the KD-CDA3 HDTV Distribution Amplifier. Your analog  
Audio may drive the speakers in your display. Your digital Audio may connect instead  
to an A/V receiver having coaxial digital (PCM) interfaces for decoding surround  
sound signals.  
For added safety and protection it is always recommended to use a good quality  
surge protector.  
Use a reliable “Source” to test your connections (like a DVD player) before routing or  
hiding any wires behind walls or ceilings.  
Mounting and Maintenance instructions  
Insert the Power Supply adapter plug, here  
The KD-CDA3 HDTV Distribution Amplifier is built for years of trouble free operation.  
It can be installed in any home theater, showroom, or other system using multiple dis-  
plays. Cleaning or maintenance is usually not necessary, but if needed use a soft  
non-abrasive dry cloth to wipe the dust from the unit.  
Next, plug the external Power Supply provided with your unit into an appropriate* wall outlet.  
Since the KD-CDA3 is an electrically powered device, it will produce a small amount  
of heat; therefore it is recommended to leave a few inches of room around the unit to  
dissipate this heat. You may attach the mounting clip provided to a suitable location, and  
then carefully clip the KD-CDA3 into the mounting clip once the mounting clip is secure.  
*Power Requirements  
External power supply  
+ 5V DC, 110-120 VAC, 60 Hz (7 watts)  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Mounting Information  
If you need to expand the distribution capability of your KD-CDA3 HDTV Distribution  
Amplifier, simply use one of the Outputs of the unit that may now be going to one of  
your displays, and connect that output to the input of another Key Digital Analog  
A convenient mounting bracket is provided  
®
The top and bottom of the unit are solid metal (no vents)  
Distribution Amplifier. The total distribution capability is the sum of the total Outputs  
of all units, minus one. For example, using the KD-CDA3 3-output Distribution  
The unit may be oriented horizontally, or mounted vertically on a wall  
®
-Use #8 or M4 screws to hang the unit (keyhole slots are provided on the base of  
Amplifier, cascaded with the Key Digital KD-CDA6 6-output Distribution Amplifier,  
the unit)  
you will need to use one of the three Outputs of the KD-CDA3 to drive the Input of  
the Input of the KD-CDA6. Hence, you will be able to drive your Source to up to 8  
displays (3 - 1 + 6 = 8).  
Remember, you MUST only use the Power Supplies intended for each product, as  
provided with each Unit. Do not attempt to share or swap Power Supplies.  
Expansion with two KD-CDA3 HDTV Distribution Amplifiers  
allows you to drive up to 3 – 1 + 3 = 5 displays  
Caution: If installing the KD-CDA3 unit or Mounting Bracket  
into sheet-rock or hollow walls, provide proper screw sup-  
port with bolts or sheet-rock anchors.  
YPbPr Component Video  
Audio  
Expansion  
You may find that as your Video and Audio system grows, you may need to distribute  
®
your Source to more than three displays. The full line of Key Digital Analog  
Distribution Amplifiers is truly expandable and cascadeable. Not only is your system  
future-proof, but also you will be able to enjoy beautiful, crystal-clear images, because  
®
the signal will not be degraded in any way when you properly cascade Key Digital  
products.  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
TROUBLESHOOTING  
PROBLEM: No power to the unit.  
You MUST use the Power Supply provided with your unit:  
If you encounter problems or find that the KD-CDA3 unit fails to properly distribute  
the “Source” signal (such as from your DVD player) to the Video Display(s) and/or  
Audio system(s), it is suggested you first check for the following:  
Verify that the external Power Supply provided with your unit is properly connected  
to a standard 110V household outlet.  
Check to make sure that the power connector is properly inserted into the jack on  
the KD-CDA3.  
Verify that your Source device and displays are functioning properly without the  
KD-CDA3. Connect your Source directly to your displays and check for proper  
operation. If you are not able to obtain satisfactory operation, correct the problem  
before proceeding with the KD-CDA3 in the path.  
Check and verify that the wall outlet is active by plugging in a component known  
to be operational, such as a desk lamp.  
Unplug the adapter from the wall and verify that the cable is not cut or interrupted  
anywhere.  
Validate that all of the connections are made at all points: the Source Output, the  
KD-CDA3 Input and Outputs, and your Display and Audio system Inputs.  
®
If none of the above works, please contact Key Digital technical support. See  
®
Be sure that you have supplied power to the KD-CDA3 unit, using ONLY the Power  
Supply adapter provided in the package with your unit.  
“How to Contact Key Digital at the end of these Operating Instructions.  
Ensure you have good-quality cables, of equal length, no greater than 300 feet  
each in length.  
PROBLEM: You are not able to view a picture on any or all of your Display  
devices.  
Check to make sure that the connected Display devices are capable of operating  
with the format and resolution of the “Source. For example, if the Source (such as  
your DVD player) outputs Component Video (YPbPr) at 1080p, but your display  
device only accepts 720p RGBHV, then there is a compatibility problem among  
your equipment.  
Troubleshooting Guide  
If you still encounter a problem with your unit or installation after checking for the  
items above, you may find it helpful to review the Troubleshooting Guide, next page:  
If any Display device connected to the output of the KD-CDA3 is not capable of  
handling HDTV-compatible video signals, make sure that the “Source” device con-  
nected to the Input of the KD-CDA3 for distribution is set to output SD-compatible  
signals (Standard Definition or 480i).  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
PROBLEM: You are able to view a picture but there is interference, noise, or  
hum bars visible on the image on one or more of your Display devices.  
For “VGA(RGBHV) operation, verify that the Sync is either present on the Green  
connector or the H & V connectors. Make sure you have properly connected Sync  
from the Output jacks of your “Source” to the Input of your KD-CDA3, and that the  
corresponding Outputs of the KD-CDA3 are properly connected to your Display(s).  
This can happen when crossing power lines when routing the cable from the  
“Source” device to the KD-CDA3, or when routing the cables from the KD-CDA3 to  
your Display device(s).  
Note: For Component Video (YPbPr), sync is present on the “Y” Channel.  
If crossing power lines is inevitable, make sure to use heavy, shielded, high-quality  
Video and Audio cables.  
PROBLEM You are able to view a picture on the Display(s), but the image  
:
Sometimes using a shielded and noise filtering surge protector can eliminate noise  
in power lines.  
is Black and White, Green, or Pink in Nature.  
This is indicative of a mismatch between “Source” and Display devices in the  
Video connections. Make sure that your Source and Displays are all of the same  
format. For example, if the Source outputs “Component Video” (YPbPr) then the  
connections to your Display(s) must also be via the “Component Video” path (and  
not the VGA).  
PROBLEM: There is no Audio from your Audio system.  
Check to make sure that the volume is turned up to an audible level on the “Source”  
device as well as the Display device. If you still encounter a problem, then:  
Make sure that the Component Video (YPbPr) or “VGAVideo (RGBHV) connec-  
tions are properly maintained throughout the entire chain from the Source, to the  
KD-CDA3, to your Display device(s).  
Make sure that the Audio connections were properly configured, and that your dis-  
play has speakers. Check the connections from start to finish for the Left (white)  
and Right (red) stereo Audio channels.  
When using the Digital Audio connection (“PCM” or coaxial audio), make sure that  
the Display device is capable of decoding this compressed bit stream of audio  
information. Most often when using the “PCM” audio function, the audio will be  
PROBLEM: There is a picture but it is “scrolling” across the screen of one  
or more of your Display devices.  
®
connected to an AV-Receiver or amplifier capable of decoding Dolby Digital .  
This happens when the Input signal from your Source device is not compatible  
you’re your Display, or if there is a problem with the Sync signal(s).  
For example, if one or more of your Displays connected to the Output of the KD-  
CDA3 is not capable of handling HDTV-compatible video signals, make sure that the  
“Source” device is set to output SD- compatible signals (Standard Definition or 480i).  
For “VGA(RGBHV) operation, verify the presence of the Sync signal.  
Note: For Component Video (YPbPr), sync is present on the “Y” Channel.  
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KD-CDA3 Operating Instructions  
RCA connectors for all Video and Audio inputs and outputs  
Future-proof and expandable:  
TECHNICAL SPECIFICATIONS  
Model: KD-CDA3 Operating Instructions  
HDTV Distribution Amplifier  
®
Can be cascaded to KD-CDA3 or other Key Digital Distribution Amplifiers  
to drive as many outputs as desired from one source  
3-Channel Component Video & Audio Distribution Amplifier  
It is possible to substitute Composite Video (CVBS) or S-Video in place of the  
Component Video signals, using appropriate adapter cables  
Key Features  
Compatible Video Signals  
Enables 3-channel signal distribution from any HDTV or SDTV Component Video  
(YPbPr) or RGBHV Video source including 1080p, to HDTV-ready displays  
Compatible with all standard analog video signal formats that use 50Hz or 60Hz  
refresh rates, including:  
Also distributes S-Video  
Also distributes a Composite Video (CVBS) signal to up to seven (7)  
Composite Video displays  
1080p, 1080i, 720p, 576p, 576i, 540p, 480p, 480i  
Distributes Video and analog stereo or digital (PCM) Audio  
RGBHV installations preclude Audio distribution with your KD-CDA3 unit  
Video  
Component Video (YPbPr) or RGBHV Video  
RGBHV installations preclude Audio distribution with your KD-CDA3 unit  
No controls  
Crystal-clear images  
Three RCA-type color-coded input connectors (YPbPr, RGB)  
1V p-p @ 75 ohms, terminated  
300 MHz video bandwidth  
Inputs and Outputs  
One (1) Audio/Video Input  
Sync:  
Three (3) Audio/Video Outputs  
Component Video (YPbPr) sync on "Y" input  
Each Input and Output array is comprised of three (3) component YPbPr analog  
Video connectors, and two (2) analog stereo Left and Right Audio connectors:  
The analog audio input/output connectors also serve as the Horizontal  
and Vertical sync for RGBHV signals  
Instead of analog Audio Input/Output,  
It is possible to substitute Composite Video (CVBS) or S-Video in place of the  
Component Video signals, using appropriate adapter cables  
the two (2) connectors can be used for:  
The Horizontal (H) and Vertical (V) sync for RGBHV signals, or  
Two (2) PCM digital Audio signals  
Supports up to seven (7) CVBS Outputs or three (3) S-Video Outputs  
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KD-CDA3 Operating Instructions  
Cable Recommendations  
Weight: 1.5 lbs. (0.7 kg.)  
Each run of YPbPr cable MUST be the same length (300’ maximum)  
Enclosure Type: Metal  
Plastic mounting bracket, included  
Bandwidth  
-3 dB @ 300 MHz  
Mounting Information  
Linear phase pass-band  
A convenient mounting bracket is provided  
Drives video signals up to 300 feet  
The top and bottom of the unit are solid metal (no vents)  
The unit may be oriented horizontally, or mounted vertically on a wall  
Video Gain  
Use #8 or M4 screws to hang the unit (keyhole slots are provided on the base of  
the unit)  
Unity gain for YPbPr and RGBHV  
CAUTION: If installing the KD-CDA3 unit or Mounting  
Bracket into sheet-rock or hollow walls, provide proper  
screw support with bolts or sheet-rock anchors.  
Analog Audio  
Analog stereo (Left and Right) Audio  
Two RCA-type color-coded input connectors (L, R)  
High-impedance (1K ohm) line level inputs  
Power Requirements  
RGBHV installations preclude Audio distribution with your KD-CDA3 unit  
External power supply  
+ 5V DC, 110-120 VAC, 60 Hz (7 watts)  
Digital Audio  
Use the analog Audio Left and Right connectors for digital PCM Audio  
CAUTION: No other power supply adapter can be used with  
Standard PCM digital format  
this unit! Using a power supply other than the one provided  
by Key Digital® with your unit VOIDS THE ENTIRE PRODUCT  
WARRANTY, may cause damage to your unit and associated  
equipment, and is a potential safety hazard.  
RGBHV installations preclude Audio distribution with your KD-CDA3 unit  
Mechanical  
Size: 4” x 8” x 1-13/16”  
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KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
How to contact Key Digital®  
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.  
Repairs and Warranty Service  
Should your KD-CDA3 HDTV Distribution Amplifier require warranty service, please  
®
contact Key Digital to obtain a Returned Materials Authorization (RMA) number  
Please contact us at either:  
Phone:  
E-mail:  
1-914-667-9700  
Technical Support  
For technical questions about using our products, please contact us at either:  
Phone:  
E-mail:  
1-914-667-9700 or Toll-free 1-888-258-2028  
Customer Support  
For customer support questions about using our products, please contact us at  
either:  
Phone:  
E-mail:  
1-914-667-9700  
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KDCDA3_OperInstructions.qxd 1/4/06 12:58 PM Page 30  
KD-CDA3 Operating Instructions  
KD-CDA3 Operating Instructions  
Notes  
Notes  
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