evertz 8025 User manual

Model 8025
Digital Video Keyer
Instruction Manual
© Copyright 1993, 1994, 1995
EVERTZ MICROSYSTEMS LTD.
3465 Mainway, Burlington, Ontario, Canada, L7M 1A9
Phone: [phone] Fax: [phone]
BBS: 905-335-9131
Internet: Tech Support: [email protected]
Sales: [email protected]
Web Page: http://www.evertz.com
Revision 1.4, Feb. 1995
The material contained in this manual consists of information that is the property of Evertz Microsystems and is
intended solely for the use of purchasers of the 8025 Digital Video Keyer. Evertz Microsystems expressly
prohibits the use of this manual for any purpose other than the operation of the 8025.
All rights reserved. No part of this publication may be reproduced without the express written permission of
Evertz Microsystems Ltd. Copies of this guide can be ordered from your Evertz products dealer or from Evertz
Microsystems.

INFORMATION TO USERS IN EUROPE
NOTE
CISPR 22 CLASS A DIGITAL DEVICE OR PERIPHERAL
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to the European Union EMC directive. 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
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.
INFORMATION TO USERS IN THE U.S.A.
NOTE
FCC CLASS A DIGITAL DEVICE OR PERIPHERAL
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. 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 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.
WARNING
Changes or Modifications not expressly approved by Evertz Microsystems Ltd. could
void the user’s authority to operate the equipment.
Use of unshielded plugs or cables may cause radiation interference. Properly shielded
interface cables with the shield connected to the chassis ground of the device must be
used.

Model 8025 Digital Video Keyer Manual
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 Original issue - preliminary release Sept. 93
1.1 Revised to add 4Fsc support Dec. 93
1.2 Installations drawings revised May 94
1.3 Updated for Version B units Sept 94
1.4 Technical Description chapter added Feb. 95
Schematic drawings, component layouts & parts lists inserted

Model 8025 Digital Video Keyer Manual
TABLE OF CONTENTS i
TABLE OF CONTENTS
1. OVERVIEW ................................................................................................................................. 1-1
1.1. HOW TO USE THIS MANUAL.................................................................................................... 1-1
1.2. DEFINITIONS.............................................................................................................................. 1-2
2. INSTALLATION .......................................................................................................................... 2-1
2.1. REAR PANEL ............................................................................................................................. 2-1
2.1.1. Digital Video Input Connections.................................................................................... 2-1
2.1.2. Digital Video Output Connections................................................................................. 2-2
2.1.3. Keyer Interface Connectors.......................................................................................... 2-2
2.1.4. Analog Monitor Connections......................................................................................... 2-3
2.1.5. Remote Control Connections........................................................................................ 2-3
2.1.6. Power Connections....................................................................................................... 2-4
2.2. MOUNTING................................................................................................................................. 2-4
2.3. POWER REQUIREMENTS.........................................................................................................2-4
2.3.1. Selecting the Correct Mains Voltage............................................................................. 2-4
2.3.2. Changing the Fuse........................................................................................................2-4
2.4. CONNECTING THE DIGITAL VIDEO......................................................................................... 2-5
2.4.1. Video Input.................................................................................................................... 2-5
2.4.2. Video Output................................................................................................................. 2-6
2.5. CONNECTING THE KEYER CONTROLS.................................................................................. 2-6
2.5.1. Connecting the Reference Sync Output ....................................................................... 2-6
2.5.2. Connecting the Keyer Control and Fill.......................................................................... 2-6
2.6. CONNECTING THE 8025 TO A 4025 FILM FOOTAGE ENCODER.......................................... 2-7
2.6.1. Connecting the 4025 and 8025 for Digital VITC Keying ............................................... 2-7
2.6.2. Connecting the 4025 and 8025 for Digital and Analog VITC Keying............................ 2-9
3. HOW TO OPERATE DIGITAL VIDEO KEYER........................................................................... 3-1
3.1. AN OVERVIEW OF KEY AND DISPLAY FUNCTIONS.............................................................. 3-1
3.1.1. The Setup Pushbutton Group....................................................................................... 3-2
3.1.2. The Function Pushbutton Group................................................................................... 3-2
3.1.3. An Overview of the Status Indicators............................................................................ 3-3
3.1.4. Front Panel Operating Messages................................................................................. 3-3
3.1.5. An Overview of the Front Panel Programming Menu ................................................... 3-4
3.2. PROGRAMMING THE 8025 OPERATIONAL MODES.............................................................. 3-5
4. TECHNICAL DESCRIPTION ...................................................................................................... 4-1

Model 8025 Digital Video Keyer Manual
TABLE OF CONTENTS ii
4.2. JUMPERS AND SWITCHES.......................................................................................................4-1
4.2.1. DIP Switch Functions.................................................................................................... 4-1
4.2.2. Jumper Functions - Main Board.................................................................................... 4-2
4.3. CIRCUIT DESCRIPTION............................................................................................................. 4-2
4.3.1. Microcontroller (8025-36).............................................................................................. 4-3
4.3.2. Front Panel Display and Pushbuttons (5220-31).......................................................... 4-4
4.3.3. Parallel Digital Video Input and Output (8025-31) ........................................................ 4-4
4.3.4. Test Generator Oscillator (8025-37)............................................................................. 4-4
4.3.5. Serial Digital Video Input (8025-33).............................................................................. 4-5
4.3.6. Serial Digital Video Output (8025-34)........................................................................... 4-5
4.3.7. Input Multiplexer and Keyer LCA (8025-32, 8025-25, 8025-37)................................... 4-6
4.3.8. Analog Composite Monitor (8026-31, 8026-32)............................................................ 4-6
Figures
Figure 2-1: 8025 Rear Panel........................................................................................................2-1
Figure 2-2: Digital Video Input Connectors...................................................................................2-1
Figure 2-3: Digital Video Output Rear Panel Connections ...........................................................2-2
Figure 2-4: Keyer Rear Panel Connections..................................................................................2-2
Figure 2-5: Analog Monitor Rear Panel Connections...................................................................2-3
Figure 2-6: Connections to a 4025 Film Footage Encoder for Digital VITC Keying
(version A with 8 digit display)......................................................................................................2-8
Figure 2-7: Connections to a 4025 Film Footage Encoder for Digital VITC Keying
(version B with 12 digit display)....................................................................................................2-9
Figure 2-8: Connections to a 4025 for Digital and Analog VITC Keying
(version A with 8 digit display)....................................................................................................2-10
Figure 2-9: Connections to a 4025 for Digital and Analog VITC Keying
(version B with 12 digit display)..................................................................................................2-11
Figure 3-1: Version A Front Panel Layout ....................................................................................3-1
Figure 3-2: Version B Front Panel Layout ....................................................................................3-1
Figure 3-3: Overview of the 8025 Programming Menu System....................................................3-5
Figure 4-1: DIP Switch Functions.................................................................................................4-1
Figure 4-2: Block Diagram............................................................................................................4-3
Drawings......................................................................................................................Drawing #
Parallel Video I/O Schematic............................................................................................. 8025-31F
Serial / Parallel Mux And I/O Schematic............................................................................ 8025-32F
Serial Video Input Schematic ............................................................................................8025-33F
Serial Video Output Schematic.......................................................................................... 8025-34F
Digital Video LCA Schematic............................................................................................. 8025-35F
Microprocessor And Eprom Schematic ............................................................................. 8025-36F
Monitor Submodule Header, Tri Oscillator And Control Inputs Schematic....................... 8025-37F
Power Supply Dip Switch And Display Header Schematic................................................ 8025-38F
Clock Buffer And Phase Restorer Schematic.................................................................... 8025-39F
Main Board Component Layout......................................................................................... 8025-80F
Display Board Schematic ..................................................................................................5220-31B
Display Board Component Layout.....................................................................................5220-85C
Video Encoder...................................................................................................................8029-30B
Digital I/O Submodule Headers.........................................................................................8029-31B
Option CC D’Code Circuit..................................................................................................8029-32B
Top Component Layout.....................................................................................................8029-80B

Model 8025 Digital Video Keyer Manual
TABLE OF CONTENTS iii
Bottom Component Layout................................................................................................8029-81B
Power Supply Schematic...................................................................................................8102-31A
Power Supply Component Layout.....................................................................................8102-80A
Parts Lists .................................................................................................................Parts List #
8025 Main Board...........................................................................................................BAM8025DK
5220 Display Board.......................................................................................................BAM5220DS
Video Encoder 8025, 8070 Submodule......................................................................... BAS8029VE
8102 Power Supply .......................................................................................................BAM8102PS
Misc. Items ...........................................................................................................................MA5000

Model 8025 Digital Video Keyer Manual
TABLE OF CONTENTS Page iv
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Model 8025 Digital Video Keyer Manual
OVERVIEW Page 1-1
1. OVERVIEW
The Model 8025 Digital video keyer provides a cost effective method of
keying vertical Interval time code or other similar signals into the digital
video bitstream.
Features:
• Keys directly into digital video bitstream
• Accepts 525 or 625 component (4:2:2) or composite (4Fsc) digital
video signals
• Parallel digital video input and output standard
• Optional Serial digital video input provides automatic cable equalization
on cable lengths up to 200 meters of low loss coax such as Belden
8281
• Optional Serial digital video output provides two separate outputs.
• Reference sync output extracted from the digital video to gen lock
equipment which is providing the key signals
• Keyer bypass mode allows video to pass through without keying any
signal in
• Built in digital video bar generator can be used for quickly verifying the
connections through your digital video system.
• Rack mountable
• 8 or 10 bit resolution
• 8 digit Alpha-numeric display, with 8 push buttons
• User setups programmed from the front panel make it easy to
reconfigure the 8025 for different applications. Configuration is recalled
from non-volatile memory on power up
• Optional Analog composite monitor output
1.1. HOW TO USE THIS MANUAL
This manual is organized into 4 chapters : Overview, Installation, and
Operation, Technical Description.
If you are currently an owner of the Evertz 4025 Film Footage Encoder, you
will find special information on connecting your digital keyer to the 4025
marked with the following symbol in the margin.
Items of special note for all users are marked with a double box like this.
4025
!
"

Model 8025 Digital Video Keyer Manual
OVERVIEW Page 1-2
1.2. DEFINITIONS
AES (Audio Engineering Society): A professional organization that
recommends standards for the audio industries.
AES/EBU:Informal name for a digital audio standard established jointly by
the Audio Engineering Society and the European Broadcasting
Union organizations.
ANALOG: An Adjective describing any signal that varies continuously as
opposed to a digital signal that contains discrete levels
representing digits 0 and 1.
A-TO D CONVERTER (ANALOG-TO-DIGITAL): A circuit that uses
digital sampling to convert an analog signal into a digital
representation of that signal.
BIT: A binary representation of 0 or 1. One of the quantized levels of
a pixel.
BIT PARALLEL: Byte-wise transmission of digital video down a multi-
conductor cable where each pair of wires carries a single bit.
This standard is covered under SMPTE 125M, EBU 3267-E and
CCIR 656.
BIT SERIAL: Bit-wise transmission of digital video down a single
conductor such as coaxial cable. May also be sent through
fiber optics. This standard is covered under SMPTE 259M and
CCIR 656.
BIT STREAM:A continuous series of bits transmitted on a line.
BNC: Abbreviation of "baby N connector". A cable connector used
extensively in television systems.
BYTE: A complete set of quantized levels containing all the bits. Bytes
consisting of 8 to 10 bits per sample are typical in digital video
systems.
CABLE EQUALIZATION: The process of altering the frequency
response of a video amplifier to compensate for high frequency
losses in coaxial cable.
CCIR (International Radio Consultative Committee) An international
standards committee.
CCIR-601:An international standard for component digital television from
which was derived SMPTE 125M and EBU 3246-E standards.
CCIR-601 defines the sampling systems, matrix values and filter

Model 8025 Digital Video Keyer Manual
OVERVIEW Page 1-3
characteristics for both Y, B-Y, R-Y and RGB component digital
television signals.
CCIR-656 The physical parallel and serial interconnect scheme for
CCIR-601. CCIR-656 defines the parallel connector pinouts as
well as the blanking, sync and multiplexing schemes used in
both parallel and serial interfaces. It reflects definitions found in
EBU Tech 3267 (for 625 line systems) and SMPTE 125M
(parallel 525 line systems) and SMPTE 259M (serial 525 line
systems).
COMPONENT ANALOG: The non-encoded output of a camera, video
tape recorder, etc., consisting of the three primary colour
signals: red, green, and blue (RGB) that together convey all
necessary picture information. In some component video
formats these three components have been translated into a
luminance signal and two colour difference signals, for example
Y, B-Y, R-Y.
COMPONENT DIGITAL: A digital representation of a component
analog signal set, most often Y, B-Y, R-Y. The encoding
parameters are specified by CCIR-601. The parallel interface is
specified by CCIR-656 and SMPTE 125M.
COMPOSITE ANALOG: An encoded video signal such as NTSC or
PAL video, that includes horizontal and vertical synchronizing
information.
COMPOSITE DIGITAL: A digitally encoded video signal, such as
NTSC or PAL video, that includes horizontal and vertical
synchronizing information.
D1: A component digital video recording format that uses data
conforming to the CCIR-601 standard. Records on 19 mm
magnetic tape. (Often used incorrectly to refer to component
digital video.)
D2: A composite digital video recording format that uses data
conforming to SMPTE 244M. Records on 19 mm magnetic
tape. (Often used incorrectly to refer to composite digital video.)
D3: A composite digital video recording format that uses data
conforming to SMPTE 244M. Records on 1/2" magnetic tape.
EBU (European Broadcasting Union): An organization of European
broadcasters that among other activities provides technical
recommendations for the 625/50 line television systems.
EBU TECH 3267-E: The EBU recommendation for the parallel interface
of 625 line digital video signal. This is a revision of the earlier