Pinnacle Systems, Inc. TARGA 3000 Mounting instructions

TARGA3000
HARDWARE & SOFTWARE INSTALLATION GUIDE

TARGA®3000
Hardware & Software Installation Guide
Pinnacle Systems, Inc.
280 N. Bernardo Avenue
Mountain View, CA 94043
June 2000
Copyright ©1993 - 2000 Pinnacle Systems, Inc.
For Windows®NT Systems
P/N 136001000
Rev. B

Patents
This device is protected under one or more of the following U.S. Patents:
5,229,852; 5,561,472; 5,327,243; 5,951, 625.
Trademarks
Pinnacle Systems and the Pinnacle Systems logo are registered trademarks of Pinnacle Systems, Inc.
TARGA is a registered trademark of Pinnacle Systems, Inc.
TARGA 3000 is a trademark of Pinnacle Systems, Inc.
Adobe, Premiere, and Acrobat are registered trademarks of Adobe Systems, Inc.
Microsoft, Windows, Windows 95, and Windows NT, are registered trademarks of Microsoft Corporation in
the U.S. and other countries.
All other product names mentioned herein are used for identification purposes only and may be trademarks
or registered trademarks of their respective companies.
Copyright © 1993-2000 Pinnacle Systems, Inc.
All Rights Reserved.
Printed in the United States.
Note: The information in this document is subject to change without notice or obligation.
Pinnacle Systems Part #136001000
For Release 1.0
06/30/2000
JML

iPinnacle Systems TARGA 3000
Table Of Contents
OFFICIAL NOTICES AND WARRANTIES ................................................................iii
FCC Declaration Of Conformity (TARGA 3000 PCI Series)..........................................iii
CE Declaration Of Conformity ........................................................................................iv
Limitation Of Liabilities.................................................................................................... v
Warranty Disclaimer ......................................................................................................... v
Limited Warranty .............................................................................................................. v
End-User License Agreement............................................................................................ v
INTRODUCTION ............................................................................................................vii
About the Pinnacle Systems TARGA 3000 ....................................................................vii
PC System Recommendations.....................................................................................viii
Using This Manual ............................................................................................................ x
CHAPTER 1 — CARD INSTALLATION & HARDWARE SETUP ........................1-1
Unpacking.......................................................................................................................1-1
Product Information.....................................................................................................1-1
Installing the TARGA 3000 Card...................................................................................1-3
Overview Of Hardware Installation Procedure ...........................................................1-3
Card Installation Procedure ......................................................................................1-3
About The TARGA 3000 Pro Analog Breakout Box .................................................1-6
Rack Mounting The TARGA 3000 Pro Analog Breakout Box ...............................1-6
Pro Analog Breakout Box Input And Output Connections ......................................1-6
Connecting Audio/Video Input Devices
To TARGA 3000 Pro Analog Breakout Box ...........................................................1-8
Connecting TARGA 3000 Pro Analog Breakout Box
To Audio/Video Output Devices..............................................................................1-8
About The TARGA 3000 Pro Digital Breakout Box ................................................1-11
Connecting Audio/Video I/O Devices
To TARGA 3000 Pro Digital Breakout Box ..........................................................1-11
About DV 1394 .........................................................................................................1-13
About Device Control................................................................................................1-13

ii Table Of Contents
CHAPTER 2 — SOFTWARE INSTALLATION AND SETUP ................................2-1
About TARGA 3000 Software .......................................................................................2-1
Software Setup For TARGA Cards .............................................................................2-1
Install The TARGA 3000 Software..........................................................................2-2
Install The Adobe Acrobat PDF Reader..................................................................2-3
APPENDIX A — TROUBLESHOOTING
& CONTACTING PINNACLE SYSTEMS...................................A-1
TARGA 3000 Troubleshooting .....................................................................................A-1
General Problems .......................................................................................................A-1
IRQ Problems .............................................................................................................A-3
Monitor Problems .......................................................................................................A-4
Video Capture Problems.............................................................................................A-5
Audio Problems ..........................................................................................................A-6
Playback Problems .....................................................................................................A-7
Pinnacle Systems Customer Satisfaction Center ...........................................................A-8
Troubleshooting Questionnaire ..................................................................................A-8
Contacting Pinnacle Systems .....................................................................................A-9
APPENDIX B — TARGA 3000 RACK MOUNT ASSEMBLY ................................ B-1
Pro Analog Breakout Box Rack Mount Installation...................................................... B-1
Rack Mounting Hardware .......................................................................................... B-1
Equipment Needed ..................................................................................................... B-1
Procedure .................................................................................................................... B-1
APPENDIX C — TARGA 3000 TECHNICAL SPECIFICATIONS ........................C-1
Technical Specifications................................................................................................ C-1
TARGA 3000 Card Only............................................................................................ C-1
TARGA 3000 Pro Analog Breakout Box Only.......................................................... C-3
TARGA 3000 Pro Digital Breakout Box Only .......................................................... C-6
INDEX ....................................................................................................................Index-1

iii
Pinnacle Systems TARGA 3000
FCC DECLARATION OF CONFORMITY
(TARGA 3000 PCI SERIES)
This equipment has been tested and found to comply with the limits for a Class A only digital device,
pursuant to Part 15 of the FCC Rules. These 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 installation 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. Any changes or modifications
not expressly approved by Pinnacle Systems could void the user’s authority to operate this device.
WARNING To minimize emissions from your system, use only shielded
interface cables and certified Class A peripherals.
Official Notices And Warranties
Legal Stuff

iv Official Notices And Warranties
DECLARATION OF CONFORMITY
Application Of Council Directive 89/336/EEC
Standards to which Conformity is Declared:
EN 55022 and EN 50082-1
Manufacturer's Name: Pinnacle Systems Inc.
Manufacturer's Address: 280 N. Bernardo Avenue
Mountain View, CA 94043
Type of Equipment: PCI Display Card
(PC Platform)
Model Name: TARGA 3000
Tested By: EMCE Engineering, Inc.
44370 S. Grimmer Blvd.
Fremont, CA 94538-6309 USA
Manufacturer's Test Engineer: Bill Stutz
I, the undersigned, hereby declare that the equipment specified above conforms to
the above Directive and Standard.
Name (please print): Carl Calabria
Title: Vice President of Engineering
Signature:
Date: 17 February 2000

v
Pinnacle Systems TARGA 3000
LIMITATION OF LIABILITIES
This manual and the enclosed software was prepared by Pinnacle Systems, Inc. While the authors and
program developers have taken reasonable care in preparing this manual and the files on the enclosed CDs to
assure their accuracy, the authors assume no liability resulting from any inaccuracy or omissions contained
in them or from the use of the information or programs contained herein.
WARRANTY DISCLAIMER
The authors and Pinnacle Systems Inc. make no warranties, expressed or implied, including without limitation
the implied warranties of merchantability and fitness for a particular purpose, regarding the software and
hardware. The authors and Pinnacle Systems Inc. do not warrant, guarantee or make any representations
regarding the use or the results of the use of the software and hardware in terms of its correctness, accuracy,
reliability, currentness or otherwise. The entire risk as to the results and performance of the software and
hardware is assumed by you. The exclusion of implied warranties is not permitted by some jurisdictions. The
above exclusion may not apply to you.
In no event will Pinnacle Systems, and its directors, officers, employees or agents (collectively Pinnacle Systems)
be liable to you for any consequential, incidental or indirect damages (including damages for loss of business
profits, business interruption, loss of business information, and the like) arising out of the use or inability to use
the software and hardware even if Pinnacle Systems has been advised of the possibility of such damages. Because
some jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages,
the above limitations may not apply to you.
LIMITED WARRANTY
Please refer to the enclosed addendum for specific information on TARGA limited warranty terms and
conditions.
END-USER LICENSE AGREEMENT
IMPORTANT-READ CAREFULLY: This Pinnacle Systems End-User License Agreement is a legal
agreement between you (either an individual or a single entity) and Pinnacle Systems Incorporated for the
Pinnacle Systems software and hardware product(s) accompanying this End User License Agreement, which
include(s) computer software and may include “online” or electronic documentation, associated media, and
printed materials (‘’PRODUCT’’). By installing, copying, or otherwise using the PRODUCT or any
UPDATES (as defined below), you agree to be bound by the terms of this End User License Agreement. If
you do not agree to the terms of this End User License Agreement, do not install, copy, or use the
PRODUCT, and promptly return the entire unused PRODUCT to your place of purchase for a full refund. In

vi Official Notices And Warranties
addition, by installing, copying, or otherwise using subscription updates that you have received as part of
the PRODUCT (‘’UPDATES’’), you agree to be bound by the additional license terms that accompany such
UPDATES. If you do not agree to the additional license terms that accompany such UPDATES, you may
not install, copy, or use such UPDATES.
PRODUCT LICENSE
The PRODUCT is protected by copyright laws and international copyright treaties, as well as other
intellectual property laws and treaties. The PRODUCT can consist of circuits, product documentation,
sample applications, hardware and cabling, tools and utilities, miscellaneous technical information, and
development toolkits.
GRANT OF LICENSE
To the extent that you have elected to receive a PRODUCT from Pinnacle Systems Inc., Pinnacle Systems
grants to you as an individual a personal, nonexclusive license to make and use copies of the PRODUCT in
the manner provided below. If you are an entity, Pinnacle Systems grants to you the right to designate
individuals within your organization to have the right to use the PRODUCT.
LIMITATIONS ON REVERSE ENGINEERING, DECOMPILATION, AND DISASSEMBLY
You may not reverse engineer, decompile, or disassemble the PRODUCT, except and only to the extent that
such activity is expressly permitted by applicable law, notwithstanding this limitation.
SOFTWARE TRANSFER
You may permanently transfer all of your rights under this End User License Agreement, provided you
retain no copies, you transfer all of the PRODUCT (including all component parts, the media and printed
materials, any upgrades, and this End User License Agreement)
PRE-RELEASE CODE
Portions of the PRODUCT or PRODUCT UPDATES may be available as prerelease code (“Prerelease
Code”). Such Prerelease Code is not at the level of performance and compatibility of the final, generally
available product offering. The Prerelease Code may not operate correctly and may be substantially
modified prior to first commercial shipment. Pinnacle Systems is not obligated to make this or any later
version of the Prerelease Code commercially available. The grant of license to use Prerelease Code expires
upon availability of a commercial release of the Prerelease Code from Pinnacle Systems.
COPYRIGHT
All title and copyrights in and to the PRODUCT (including but not limited to any images, photographs,
animations, video, audio, music, text, and “applets,” incorporated into the PRODUCT), the accompanying
printed materials, and any copies of the PRODUCT, are owned by Pinnacle Systems or its suppliers. The
PRODUCT is protected by copyright laws and international treaty provisions. Therefore, you must treat the
PRODUCT like any other copyrighted material.

vii
Pinnacle Systems TARGA 3000
Introduction
About The Pinnacle Systems
TARGA®3000
Important: Be sure to register your TARGA 3000 Series product. Doing so will entitle you to software
updates, answers to frequently asked questions, and put you on the TARGA E-Mail distribution to receive
important bulletins. Either fill out the registration card enclosed in the box (see Chapter 1), or register online
at: http://www.pinnaclesys.com/register
The TARGA 3000 is Pinnacle Systems’ most powerful desktop editing and compositing
solution. TARGA 3000 provides broadcast quality video, including true uncompressed
video as well as MPEG-2 and DV video processing. TARGA 3000 also supports the
“RGB A” format for effects processing, and is compatible with the video and key features
provided by animation and compositing applications. The TARGA 3000 video processor
has a memory centric architecture that enables complex multilayer editing and
compositing in real-time with sub-pixel DVEs, RGB chroma keying, and advanced color
correction operating simultaneously on multiple layers of video. TARGA 3000 offers a
complete range of analog and digital I/O, most of which are provided by the TARGA 3000
series of professional Pro Analog and Pro Digital Breakout Boxes
Other features of a TARGA 3000 system are:
Note: MPEG-2 capture and editing is not available in the 1.0 software release of TARGA 3000. MPEG-2
export is available. MPEG-2 capture and editing is an integral part of TARGA 3000 system, and will be
provided free of charge in an upcoming software release.
• Real-time playback of 3 streams of D1 uncompressed video in real time and 2 streams of
compressed video in real time with on-board capability to move up to 4 streams.
• Support for multiple compression formats (MPEG-2 and DV25).
• Support for true uncompressed video capture, edit, and playback in Composite; S-Video (Y/C);
Y,B-Y,R-Y; and Serial Digital (SDI) formats.
•Support for uncompressed alpha playback allowing for full compositing of animations drawn
from complimentary applications such as CommotionDV.

viii Introduction
• Multiple real-time effects layers with full 2D place and size, slow-motion, color correction,
and programmable keying on every layer.
• Unlimited non-real-time effects layers with faster than real-time rendering
• Advanced chroma keying in addition to luma and alpha keying
• Color correction capabilities with programmable color space conversion and full curve fitting
on any color component.
• Pipeline ProVTR RS-422 Device Control.
• Adobe Premiere or other non-linear editing software.
• True 2D 14-bit Sub-pixel up/down Resizer.
PC System Recommendations
We recommend that you use a certified Pinnacle Systems workstation, or a Pinnacle
Systems “Ready To Edit” solution. This is because the throughput requirements for
multiple simultaneous video streams plus graphics and audio are extremely high. As a
result, system hardware requirements are equally high. TARGA 3000 requires a high-end
workstation capable of handling this level of throughput.
In addition, configuring the workstation is difficult because TARGA 3000 is specifically
designed to push the system to its throughput limit to provide you the greatest possible
productivity. Under the hood of a high-end personal workstation, you’ll find many
permutations of BIOS settings, NT service packs, interrupt conflicts, hard drive mode page
settings, hard drive striping/formatting settings, driver settings, and PCI slot selections.
Pinnacle Systems has certified only a few specific configurations so these and other
criteria can be precisely optimized for the highest possible throughput in a real-time video
environment. These settings are so interrelated and specific to each configuration that it is

ix
Pinnacle Systems TARGA 3000
exceptionally difficult for Pinnacle Systems to support systems that we do not physically
have in Technical Support.
Although you may have had a successful experience in configuring a video system
yourself, we strongly discourage you from attempting to do so with a TARGA 3000. It is a
better choice to rely upon your Pinnacle Systems Authorized Value Added Reseller to
configure a system for you. For a list of Authorized Value Added Resellers and certified
TARGA 3000 system configurations, see the Customer Support section of the Pinnacle
Systems web site at: http://www.pinnaclesys.com
TARGA 3000 system recommendations are as follows:
•Pinnacle Systems certified pre-configured workstation (with workstation monitor, keyboard,
mouse, and cables for these items)
• TARGA 3000 Pro Analog or Pro Digital Breakout Box
• One or more VTRs (preferably IEEE-1394 or SDI SMPTE 259M compatible)
• Analog video monitor
• Speakers
• Cables for connecting your deck, analog video monitor, and speakers
Your VTR should be the highest practical quality. To take advantage of the capabilities of
TARGA 3000, we recommend a deck with component-level outputs, although the
TARGA 3000 does accept S-Video and Composite Video. Also, a deck with RS-422 for
device control lets you control it from within Premiere v5.1 or greater.
Note: For the latest information on what versions of Adobe Premiere or other non-linear editing
software can be used, check the online compatibility guide at http://www.pinnaclesys.com

x Introduction
Using This Manual
Here is a quick overview of this manual’s Chapters and Appendices:
•Chapter 1 -- Discusses unpacking your TARGA card, installing the card into a certified
pre-configured workstation, and connecting input/output devices.
•Chapter 2 -- Gives instructions for installing the TARGA software, installing Adobe Acrobat’s
PDF reader, and using the online documentation.
•Appendix A -- Covers TARGA 3000 Troubleshooting and contacting the Pinnacle Systems
Customer Support Center (for technical support and troubleshooting).
•Appendix B -- Details the TARGA 3000 Pro Analog Breakout Box Rack Mount installation.
•Appendix C -- Lists the TARGA 3000 Technical Specifications.

1-1
Pinnacle Systems TARGA 3000
Unpacking
The following items should be included in the Pinnacle Systems TARGA package:
• TARGA 3000 video production card
• TARGA 3000 Pro Analog or Pro Digital Breakout Box
• Anti-Static Wrist Strap
• TARGA 3000 Quick Start Sheet
• IEEE-1394/iLINK Cable
• RS-422 to RS-232 Serial Device Cable
• Pinnacle Systems TARGA software CD
• Adobe Premiere software CD
• Pinnacle Systems CommotionDV software CD
• Other complementary software CDs
WARNING Do not remove the card from its antistatic bag until you’re ready to
install it. Removing the card prematurely exposes it to static electricity,
which could damage it.
Product Information
The Warranty/Registration Card for your TARGA product can be found in the box. Please
follow the directions on the card to register your product.
Also, please record the following information before you install your TARGA card. This
information is necessary for Pinnacle Systems Technical Support to serve you. If you
need assistance, see the Troubleshooting Appendix for more information on Technical
Support.
Purchased From_____________________
Purchase Date______________________
Card Serial Number______________________
(On underside of card)
Chapter 1: Card Installation & Hardware Setup

1-2 Chapter 1: Card Installation & Hardware Setup
Digital Tether Connector (36-pin female) -- This connector is where the TARGA 3000 Pro Analog or Pro
Digital Breakout Box is connected. It accepts input from and provides output to the Pro Analog Breakout Box
in parallel ITU-R BT.656 format. The connector also inputs to and accepts the serial digital format from the
Pro Digital Breakout Box.
1394 Connector (6-pin male) -- This connector allows you to connect a digital camcorder or VTR via a
IEEE-1394/iLINK cable to the TARGA 3000 card. The connection will accept both video and audio signals,
but note that no power is output from this connection.
VIP Connector (26-pin male) -- This connector is for future expansion card capability or use.
1394 Connector (4-pin female) -- This connector allows you to connect a digital camcorder or VTR via a
IEEE-1394/iLINK cable to the TARGA 3000 card. The connection will accept both video and audio signals.
No power is output from this connection.
A/V I/O Connector (180-pin female) -- Allows an audio/video module (i.e., daughter card) to be connected to
the TARGA 3000 card for signal processing.
LED -- When the TARGA 3000 card is installed, this LED momentarily flashes every time the computer is
powered up. If this LED displays a steady light and does not go out once the computer is powered up, then the
TARGA 3000 card is damaged. Refer to “Appendix A: Troubleshooting & Contacting Pinnacle Systems.”
Figure 1-1 TARGA 3000 Card
1394 Connector
(6-Pin Male)
Digital Tether Connector
VIP Connector
1394 Connector
(4-Pin Female)
A/V I/O Connector LED

1-3
Pinnacle Systems TARGA 3000
Installing The TARGA 3000 Card
Overview Of Hardware Installation
Complete hardware installation of the TARGA 3000 can be accomplished by doing the
following:
• Install TARGA 3000 card into the computer
•Attach TARGA 3000 Pro Analog or Pro Digital Breakout Box to TARGA 3000 card
• Connect input and output devices to Pro Analog or Pro Digital Breakout Box
•Optional: Connect inputting DV 1394 device to TARGA 3000 card
•Optional: Setup Device Control
Details for each of the items listed above can be found in this Chapter.
Card Installation Procedure
These are general-purpose installation instructions. Since a computer can come in
different design configuration styles (such as the “tower” design), you should refer to the
owner’s manual of your computer for additional information on installing cards. You
should also refer to the “Read Me” files provided with the TARGA software.
1. Turn off the computer and monitor.
Unplug the computer and disconnect any communication cables from the rear of the
computer. Unplugging the power cord and cables helps to ensure that no power is
running on the motherboard, which reduces the risk of damage to your equipment and
the TARGA card.
2. Remove the cover from the computer.
Check the owner’s manual for instructions on how to remove the cover.
3. Discharge static electricity that you may have on your clothes or body.
Use the Anti-Static Wrist Strap that is provided with your TARGA package. Also,
touch the metal part of the power supply to discharge any static electric charge that
you might be carrying.

1-4 Chapter 1: Card Installation & Hardware Setup
4. Prepare an expansion slot.
Locate an empty PCI slot and remove the metal slot cover at the back of the
computer’s expansion slot area (Figure 1-2). Make sure the slot can accommodate
the full length and width of the TARGA 3000, and that there are no obstructions.
5. Remove the TARGA card from its antistatic bag.
Make sure you are grounded via the antistatic wrist strap that is provided with your
TARGA package. Handle the card by its edges and by its metal bracket. Avoid
touching the connector pins on the bottom of the card.
6. Optional: Attach module to A/V input/output connector on card .
If you have a module (i.e., daughter card) to connect to the TARGA 3000 input/
output connector (refer to Figure 1-1), you may want to connect the module to the
TARGA at this time. Refer to the instructions that came with your module.
7. Insert the TARGA card into the expansion slot.
With the bracket toward the open access port, align the connector on the bottom of
the card directly over the slot you’ve chosen. Then push down and gently rock the
Figure 1-2 PCI Expansion Slot Location
PCI Slots
Expansion
Slots
Slot Covers

1-5
Pinnacle Systems TARGA 3000
card lengthwise until the card is firmly seated. The board may need to be “seated”
twice. When pushed into the slot, the board will catch as if it were in place – gently
continue to exert pressure until the board “seats” again or until you see that the board
is completely installed.
Important: Don’t force the card. If there is resistance, remove the card and try
again.
8. If you are not going to use the 4-pin hole 1394 connector (refer to Figure 1-1),
put the cover back on the computer .
If necessary, check the owner’s manual for instructions on how to place the cover
back onto the computer.
9. Optional: If using the card's VIP connector and/or 4-pin hole 1394 connector,
attach the appropriate peripheral(s) at this time.
10. Connect Pro Analog or Pro Digital Breakout Box to the TARGA 3000 card.
Connect the cable from the back of the Pro Analog or Pro Digital Breakout Box to
the output connector on the bracket of the TARGA 3000 card. Refer to Figure 1-3.
Important: We recommend that you do not disconnect or reconnect the Breakout Box
cable from or to the TARGA 3000 card while the computer is powered up.
Figure 1-3 Pro Analog Breakout Box Cable To TARGA
6-Ft. Cord

1-6 Chapter 1: Card Installation & Hardware Setup
About The TARGA 3000 Pro Analog Breakout Box
The TARGA 3000 Pro Analog Breakout Box supports XLR balanced audio, RCA
unbalanced audio, S-Video (YC), Component Video (Y, B-Y, R-Y), Composite Video
(CV/CS), Reference (synchronized or genlocked), and a key out (COMP-B). Refer to
Figure 1-4.
Rack Mounting The TARGA 3000 Pro Analog Breakout Box
An optional rack mounting kit for the TARGA 3000 Pro Analog Breakout Box can be
acquired from where the TARGA 3000 was purchased. Rack Mounting instructions for
the TARGA 3000 Pro Analog Breakout Box can be found in Appendix B.
Pro Analog Breakout Box Input And Output Connections
The input and output connections for the TARGA 3000 Pro Analog Breakout Box are
defined as follows:
XLR Audio: The dual-channel XLR connectors are for balanced analog input and output
audio. Use the XLR connector labeled “L” for Left and “R” for right.
Figure 1-4 TARGA 3000 Pro Analog Breakout Box Input and Output Connections

1-7
Pinnacle Systems TARGA 3000
RCA Audio: The dual-channel RCA connectors are for unbalanced analog input and output
audio. Use the RCA connector labeled “L” for Left and “R” for right.
S-VIDEO: If you are using an S-Video (Y/C) input or output source, use the S-Video
4-pin Mini-DIN connector.
Y B-Y R-Y: The BNC connectors labeled “Y,” “B-Y,” and “R-Y” are used for Betacam
and Betacam-J component input and output. If a Betacam format is going to
be used, all 3 of the BNC connectors for input or output must be used for a
complete betacam signal. “Y” is for Luma or Luminance. “B-Y” and “R-Y”
signify color difference in a signal.
The color difference labeling Pinnacle Systems uses (Y/B-Y/R-Y) is a
standard representation of a Betacam Component video signal format. You
may encounter others, such as Y/Pb/Pr or Y/U/V. In these cases, attach the
Breakout “Y” to the Y connector on the peripheral, the Breakout “B-Y” to the
U or Pb/B connector on the peripheral, and the Breakout “R-Y” to a V or Pr/R
connector on the peripheral.
COMPOSITE: If you are using a Composite Video input or output source, use the BNC
connector labeled “Composite” for Composite Video (CV).
REF: “Ref” (Reference) is used to provide subcarrier field ID for the S-Video and
Composite outputs. This is to be used when Y/B-Y/R-Y is selected as an
input. If “Ref” is used, both it and the selected video source must be locked
together.
COMP(B): Use to output to a second Composite Video device, or as a “Key” output
signal. The output signal is provided for application software that allows an
8-bit Alpha channel for image blending information. Availability of a Key
signal is a function of third party applications designed to take advantage of
this hardware feature of the TARGA 3000.