evertz 8084 User manual

Model 8084
Digital Video Closed Caption Encoder
Model 8084AD
Analog & Digital Video Closed Caption Encoder
Model 8085
DTV Closed Caption Encoder
Instruction Manual
© Copyright 2000-2009
EVERTZ MICROSYSTEMS LTD.
5288 John Lucas Drive, Burlington, Ontario, Canada, L7L 5Z9
Phone: [phone]
Fax: [phone]
Internet: Sales: [email protected]
Tech Support: [email protected]
Web Page: http://www.evertz.com
Revision 1.6.6. October 2009
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 8084/8084AD/8085 Closed Caption Encoders. Evertz
Microsystems expressly prohibits the use of this manual for any purpose other than the operation of the caption
encoder.
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.

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IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with arrowhead symbol within an equilateral triangle is
intended to alert the user to the presence of uninsulated “Dangerous voltage”
within the product’s enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user
to the presence of important operating and maintenance (Servicing) instructions
in the literature accompanying the product.
•Read these instructions
•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 manufacturer’s instructions.
•Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
•Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than 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.
•Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles and the point where they exit from the apparatus.
•Only use attachments/accessories specified by the manufacturer
•Unplug this apparatus during lightning storms or when unused for long periods of time.
•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.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC – SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE
WARNING
DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING OR SPLASHING AND ENSURE THAT NO
OBJECTS FILLED WITH LIQUIDS ARE PLACED ON THE EQUIPMENT
WARNING
TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM THE AC MAINS, DISCONNECT THE
POWER SUPPLY CORD PLUG FROM THE AC RECEPTACLE
WARNING
THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN READILY OPERABLE

INFORMATION TO USERS IN EUROPE
NOTE
This equipment with the CE marking complies with bother the EMC Directive (89/336/EEC) and the
Low Voltage Directive (73/23/EEC) issued by the Commission of the European Community.
Compliance with these directives implies conformity to the following European standards:
•EN60065 Product Safety
•EN55103-1 Electromagnetic Interference Class A (Emission)
•EN55103-2 Electromagnetic Susceptibility (Immunity)
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.

NOTICE TO MODEM USERS IN THE USA
The 8084 and 8084AD Caption Encoders comply with the FCC Rules Part
68. The caption encoder is designed to be used on standard device
telephone lines. It connects to the telephone line by means of a standard
jack called the USOC RJ11C and should be connected to the telephone
network with a FCC compliant telephone cord and modular plug.
It is not necessary to notify the telephone company before connecting the
modem in the caption encoder. However, the telephone company may
request the telephone number to which the caption encoder modem is
connected and the FCC registration number and ringer equivalence number
(REN), both of which are on the label on the rear panel.
The REN is used to determine the number of devices you may legally
connect to your telephone line. In most areas, the sum of the REN of all
devices connected to one line must not exceed five (5.0). You should contact
your telephone company to determine the maximum REN for your calling
area.
The caption encoder may not be used on coin service provided by the
telephone company. Connection to party lines is subject to state tariffs.
If the modem in the caption encoder is malfunctioning, it may affect the
telephone lines. In this case, disconnect the modem until the source of the
difficulty is traced.
IMPORTANT INSTALLATION NOTICE
FOR A RELIABLE TELEPHONE CONNECTION TO THE MODEM IN THIS
CAPTION ENCODER A DIRECT TELEPHONE LINE MUST BE USED. THIS
LINE MUST NOT PASS THROUGH A PBX OR SIMILAR KEY DEVICE.

Models 8084/8084AD/8085 Closed Caption Encoder Manual
REVISION HISTORY Revision 1.6.6
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 First Edition Jan 00
1.1 Incorporated 8084AD functionality Aug 00
Features updated for firmware version 000823
1.2 Incorporated 8085 functionality Nov 00
Features updated for firmware version 001105
Expanded FAQ in Chapter 6
1.3 Incorporated Change Sheets 1.2-1 and 1.2-2 Jan 02
Features updated for firmware version 011205
Added V-Chip codes to FAQ
1.3.1 Added Application Notes 2 and 3 Feb 02
1.3.2 Updated Application 3 Mar 02
1.4 Corrected example in section 4.7.1, Move Glossary to chapter 1 May 05
Incorporated Change Sheets 1.3-1 and 1.3-2
1.5 Removed obsolete instructions Aug 05
1.6 Typographical corrections, fixed some examples in Ctrl-A protocol Jan 06
1.6.1 Added information on changing the battery Aug 06
1.6.2 Added info for firmware update Feb 07
1.6.3 Minor Corrections Apr 07
1.6.4 Removed references to Field Mode Aug 07
1.6.5 Changed RS-422 Tributary Serial Port pin out Jan 08
1.6.6 Updated the Real Time State information Oct 09
Information contained in this manual is believed to be accurate and reliable. However, Evertz assumes no responsibility for the use thereof nor
for the rights of third parties, which may be effected in any way by the use thereof. Any representations in this document concerning
performance of Evertz products are for informational use only and are not warranties of future performance, either express or implied. The only
warranty offered by Evertz in relation to this product is the Evertz standard limited warranty, stated in the sales contract or order confirmation
form.
Although every attempt has been made to accurately describe the features, installation and operation of this product in this manual, no warranty
is granted nor liability assumed in relation to any errors or omissions unless specifically undertaken in the Evertz sales contract or order
confirmation. Information contained in this manual is periodically updated and changes will be incorporated into subsequent editions. If you
encounter an error, please notify Evertz Customer Service department. Evertz reserves the right, without notice or liability, to make changes in
equipment design or specifications.

Models 8084/8084AD/8085 Closed Caption Encoder Manual
CONTENTS Revision 1.6.6 Page i
TABLE OF CONTENTS
1 OVERVIEW..................................................................................................................................1-1
1.1 THE CLOSED CAPTION SYSTEM.............................................................................................1-2
1.2 FEATURES..................................................................................................................................1-3
1.2.1 Hardware System Features: ............................................................................................1-3
1.2.2 Serial Digital Video Path Features:..................................................................................1-4
1.2.3 Component Analog Video Path Features (8084AD only):................................................1-4
1.2.4 Data Encoding Features: .................................................................................................1-4
1.2.5 Communications Features:..............................................................................................1-4
1.2.6 Field Mode Operation: (Legacy Operation)......................................................................1-5
1.2.7 Stream Mode Operation:..................................................................................................1-5
1.3 DAYLIGHT SAVING TIME ADJUSTMENT.................................................................................1-5
1.4 HOW TO USE THIS MANUAL.................................................................................................... 1-6
1.5 GLOSSARY OF TERMS .............................................................................................................1-7
2 INSTALLATION...........................................................................................................................2-1
2.1 REAR PANEL..............................................................................................................................2-1
2.1.1 Program Video Connections............................................................................................2-1
2.1.2 Preview Video Connections.............................................................................................2-2
2.1.3 Serial Port / Modem Connections ....................................................................................2-3
2.1.4 Parallel Remote Control Connections..............................................................................2-4
2.1.5 Power Connections..........................................................................................................2-4
2.2 MOUNTING .................................................................................................................................2-4
2.3 POWER REQUIREMENTS .........................................................................................................2-5
2.4 CONNECTING THE DIGITAL VIDEO.........................................................................................2-5
2.4.1 SDI Video Input................................................................................................................2-5
2.4.2 SDI Video Output.............................................................................................................2-5
2.5 CONNECTING THE ANALOG VIDEO........................................................................................2-6
2.5.1 Decoder Outputs (from SDI video path)........................................................................... 2-6
2.5.2 Composite Analog Video Input (8084AD only)................................................................. 2-6
2.5.3 Composite Analog Video Output (8084AD only).............................................................. 2-6
2.6 CONNECTING THE ENCODER TO A CLOSED CAPTION COMPUTER.................................. 2-6
2.7 CONNECTING TO AN ATSC ENCODER (8085 only)............................................................... 2-9
3 HOW TO OPERATE THE DIGITAL CLOSED CAPTION ENCODER ........................................ 3-1

Models 8084/8084AD/8085 Closed Caption Encoder Manual
CONTENTS Revision 1.6.6 Page ii
3.1 AN OVERVIEW OF KEY AND DISPLAY FUNCTIONS..............................................................3-1
3.1.1 Navigating the Front Panel Menus -- The Setup Group................................................... 3-2
3.1.2 Caption Keyer Control Group...........................................................................................3-5
3.1.2.1 Keyer Control on 8084AD, 8085 and later 8084 Encoders..................................3-5
3.1.2.2 Keyer Control on Early 8084 Encoders................................................................3-6
3.1.3 Status Indicator Lights......................................................................................................3-6
3.1.4 Front Panel Operating Messages ....................................................................................3-8
3.2 SETUP MENU ITEMS ...............................................................................................................3-12
3.2.1 Selecting The Type Of Video Being Used......................................................................3-12
3.2.2 Selecting the Line Caption Data Will be Encoded On....................................................3-12
3.2.3 Selecting Whether the Internal Modem will Auto Answer ..............................................3-12
3.2.4 Configuring the Built-In Closed Caption Decoder ..........................................................3-13
3.2.5 Operating the Manual Bypass Relay..............................................................................3-14
3.2.6 Selecting the Upstream Caption Source (8084AD only)................................................3-15
3.2.7 Inserting “V-Chip” Ratings Locally (8084 and 8084AD) .................................................3-15
3.2.7.1 Inserting a Program Rating ................................................................................3-15
3.2.7.2 Inserting a “Default” Program Rating..................................................................3-16
3.2.7.3 Compatibility With V-Chip Software ...................................................................3-16
3.3 ENGINEERING SETUP MENU ITEMS .....................................................................................3-16
3.3.1 Setting the Serial Port Baud Rate and Data Format ......................................................3-16
3.3.2 Setting the Serial Port Access Permission.....................................................................3-18
3.3.3 Special Functions of Port B (8084 and 8084AD) ...........................................................3-18
3.3.4 ATSC Functions of Port B (8085 only)...........................................................................3-20
3.3.5 Vertical Shift of the Caption Line Data...........................................................................3-22
3.3.6 Configuring Whether Upstream Captions and XDS will be Passed or Blocked.............3-22
3.3.7 SETTING THE ENCODER CLOCK...............................................................................3-23
3.3.7.1 Setting the Time.................................................................................................3-23
3.3.7.2 Setting the Date..................................................................................................3-23
3.3.7.3 Setting the Time Zone........................................................................................3-23
3.3.7.4 Setting the Daylight Saving Time Observance...................................................3-24
3.3.8 Configuring the Linear Time Code Reader
(LTC Option Installed)....................................................................................................3-24
3.3.9 Configuring the LTC Daylight Saving Time Support
(LTC Reader Option Installed).......................................................................................3-25
3.3.10 Encoding a Test Message............................................................................................. 3-26
3.3.11 Using the 16 Second Erase Timer.................................................................................3-27
3.3.12 CLEARING XDS PACKETS FROM MEMORY..............................................................3-27
3.3.13 Monitoring the Status of the Parallel Remote Control Inputs.........................................3-27
3.3.14 Resetting the Closed Caption Encoder to Factory Defaults...........................................3-28
3.3.15 Performing a Front Panel Reset to its Power-On State .................................................3-28
3.4 MONITORING THE INCOMING DATA..................................................................................... 3-28
3.4.1 Monitoring the Data in ‘Stream Mode’............................................................................3-28
3.5 PARALLEL REMOTE CONTROL CONNECTIONS ................................................................. 3-29
3.5.1 Disabling the Caption Keyer using the Parallel Remote Control....................................3-29
3.5.2 Enabling the Bypass Relay using the Parallel Remote Control .....................................3-30
3.5.3 Disabling the Serial Ports using the Parallel Remote Control........................................3-30

Models 8084/8084AD/8085 Closed Caption Encoder Manual
CONTENTS Revision 1.6.6 Page iii
3.5.4 Shifting Caption Text Up using the Parallel Remote Control .........................................3-30
4 SERIAL COMMAND PROTOCOL ..............................................................................................4-1
4.1 COMMAND CROSS REFERENCE............................................................................................. 4-1
4.2 COMMAND SYNTAX DESCRIPTION......................................................................................... 4-2
4.2.1 Special Characters...........................................................................................................4-2
4.2.2 Parameters.......................................................................................................................4-2
4.2.3 Flow Control Handshaking...............................................................................................4-5
4.2.4 Break Handling.................................................................................................................4-5
4.2.5 Command Responses and Error Messages ....................................................................4-5
4.2.6 Command Differences Between Operating Modes (Legacy Operation)..........................4-6
4.3 COMMANDS COMMON TO OPERATING MODES ...................................................................4-6
4.3.1 Set Baud Rate..................................................................................................................4-6
4.3.2 Reset Encoder .................................................................................................................4-7
4.3.3 Set Output Line................................................................................................................4-8
4.3.4 Monitoring the Line 21 Data on the Serial Port................................................................4-8
4.3.5 Controlling the Caption Decoder......................................................................................4-8
4.3.6 Report Firmware Version .................................................................................................4-9
4.3.7 Command Help ................................................................................................................4-9
4.3.8 Set Stream Mode .............................................................................................................4-9
4.3.9 Report Bypass Switch Mode..........................................................................................4-10
4.3.10 Report Battery Status.....................................................................................................4-10
4.3.11 Set / Report Time of Day Clock......................................................................................4-10
4.3.12 Set / Report Calendar Date............................................................................................4-11
4.4 COMMANDS SUPPORTED IN STREAM OPERATING MODE ............................................... 4-12
4.4.1 Transparent State ..........................................................................................................4-12
4.4.2 Null State........................................................................................................................4-13
4.4.3 Direct Control State........................................................................................................4-13
4.4.4 Real Time State .............................................................................................................4-14
4.4.5 Display System Status ...................................................................................................4-15
4.5 TEXT ARTICLES (STREAM MODE ONLY).............................................................................. 4-16
4.5.1 Input Article....................................................................................................................4-16
4.5.2 Output Article .................................................................................................................4-17
4.5.3 Delete Article..................................................................................................................4-18
4.5.4 Queue Articles................................................................................................................4-18
4.5.5 Display Article Status.....................................................................................................4-19
4.5.6 Display Output Queue....................................................................................................4-19
4.6 EXTENDED DATA SERVICES (STREAM MODE ONLY)........................................................4-19
4.6.1 Input XDS.......................................................................................................................4-20
4.6.2 Blocking Upstream XDS Packets...................................................................................4-21
4.6.3 Queue XDS Packets......................................................................................................4-22
4.6.4 Delete XDS Packet ........................................................................................................4-22
4.7 COMM PORT CONTROL COMMANDS (STREAM MODE)..................................................... 4-23

Models 8084/8084AD/8085 Closed Caption Encoder Manual
CONTENTS Revision 1.6.6 Page iv
4.7.1 Show Port Permission Maps..........................................................................................4-23
4.7.2 Alter Port Permission Maps............................................................................................4-24
4.7.3 Show Port Active Maps..................................................................................................4-25
4.7.4 Alter Port Active Maps....................................................................................................4-25
4.7.5 Reset Port......................................................................................................................4-26
5 TECHNICAL DESCRIPTION....................................................................................................... 5-1
5.1 OVERVIEW..................................................................................................................................5-1
5.1.1 Block Diagrams................................................................................................................5-1
5.2 SPECIFICATIONS.......................................................................................................................5-3
5.2.1 Serial Digital Video Input..................................................................................................5-3
5.2.2 Serial Digital Video Outputs.............................................................................................5-3
5.2.3 Composite Analog Video Input (8084AD only)................................................................. 5-3
5.2.4 Composite Analog Video Outputs (8084AD only)............................................................5-3
5.2.5 Electrical...........................................................................................................................5-4
5.3 SERVICING INSTRUCTIONS .....................................................................................................5-4
5.3.1 Changing The Fuses........................................................................................................5-4
5.3.2 REPLACING THE BATTERY...........................................................................................5-5
5.3.2.1 Safety Guidelines and Precautions concerning the Use of 3V Lithium Batteries.5-5
5.3.2.2 Procedure for Replacing the Battery....................................................................5-6
5.3.3 Changing DIP Switch Settings.........................................................................................5-6
5.3.4 Configuring Serial Port A..................................................................................................5-6
5.3.5 Configuring Serial Ports B and C.....................................................................................5-8
5.4 CIRCUIT DESCRIPTION.............................................................................................................5-9
5.4.1 Front Panel Display and Pushbuttons..............................................................................5-9
5.4.2 Modems .........................................................................................................................5-10
5.4.3 Analog Composite Monitor 9000CME............................................................................5-10
5.5 UPGRADING THE FIRMWARE................................................................................................ 5-11
5.5.1 Overview........................................................................................................................5-11
5.5.2 Procedure for Firmware Upgrades.................................................................................5-11
5.5.3 Viewing Firmware and PLD Revision Levels .................................................................5-13
6 TROUBLESHOOTING ................................................................................................................6-1
6.1 ANSWERS TO FREQUENTLY ASKED QUESTIONS................................................................6-1
6.1.1 Which serial port should I connect to?.............................................................................6-1
6.1.2 There is no SDI video being output from the unit.............................................................6-1
6.1.3 There is valid input video but the front panel shows “VIDEO MISSING”. ........................6-1
6.1.4 What baud rate and port settings should I use?...............................................................6-2
6.1.5 I see “BUFFER OVERFLOW” or “PARITY BAD” messages on the front panel...............6-2
6.1.6 How do I check the logic levels and pinouts of the serial ports?......................................6-2
6.1.7 Why does my Port A logic level appear as “???” .............................................................6-2
6.1.8 How do I check the status of my power supplies?...........................................................6-2
6.1.9 Captions are not being encoded at all..............................................................................6-3

Models 8084/8084AD/8085 Closed Caption Encoder Manual
CONTENTS Revision 1.6.6 Page v
6.1.10 Captions are not being encoded correctly........................................................................ 6-3
6.1.11 My 8084AD sometimes drops or repeats caption characters. .........................................6-4
6.1.12 The Caption Shift Up GPI is not working properly............................................................6-4
6.1.13 Why has the Keyer Disable GPI stopped working? .........................................................6-4
6.1.14 Why doesn’t my caption encoder have this button/LED/menu item?...............................6-5
6.1.15 How can I block upstream captions? ...............................................................................6-5
6.1.16 How can I pass upstream captions?................................................................................6-5
6.1.17 How can I encode XDS / V-Chip “Content Advisory” or “Program Rating” packets?.......6-6
6.1.18 When the caption decoder is set to XDS, the text sometimes disappears momentarily..6-8
6.1.19 Captioning waveform is at the wrong voltage level when converted to analog video. .....6-8
6.1.20 When should I use “Reset to Factory Defaults”? .............................................................6-8
6.1.21 I cannot get the VBI Bridge or Port Passthrough feature to work correctly......................6-8
6.1.22 My Modem Connection Hangs-Up Unexpectedly ............................................................ 6-9
6.2 BEFORE YOU CALL EVERTZ TECHNICAL SUPPORT…...................................................... 6-10
6.3 CREATING A CAPTURE FILE .................................................................................................6-10
Appendix A: Application Note 2: VBI Bridging of Closed Caption Data......................................AN2-1
Appendix B: Application Note 3: Transmitting Time of Day using XDS Packets.......................AN3-1

Models 8084/8084AD/8085 Closed Caption Encoder Manual
CONTENTS Revision 1.6.6 Page vi
Figures:
Figure 1-1: Typical Line 21 Closed Caption Signal......................................................................1-3
Figure 2-1: 8084 Rear Panel – Early versions............................................................................. 2-1
Figure 2-2: 8084 Rear Panel – Later versions.............................................................................2-1
Figure 2-3: 8084AD Rear Panel...................................................................................................2-1
Figure 2-4: 8085 Rear Panel........................................................................................................2-1
Figure 2-5: Parallel GPI Port Pinout.............................................................................................2-4
Figure 2-6: Typical Connections to the 8084AD Caption Encoder ..............................................2-7
Figure 2-7: Typical Connections to the 8085 DTV Caption Encoder...........................................2-8
Figure 2-8: Wiring RS-232 DTE Serial Port to Computer ............................................................2-8
Figure 2-9: Wiring RS-422 Tributary Serial Port to RS-422 Master.............................................2-9
Figure 2-10: ATSC Cable Wiring Diagram Port B to DTE port ....................................................2-9
Figure 2-11: ATSC Cable Wiring Diagram Port B to DCE port..................................................2-10
Figure 3-1: Original 8084 Front Panel Layout..............................................................................3-1
Figure 3-2: Newer 8084 Front Panel Layout................................................................................ 3-1
Figure 3-3: 8084AD Front Panel Layout......................................................................................3-1
Figure 3-4: 8085 Front Panel Layout...........................................................................................3-1
Figure 3-5: Overview of the Setup Menu System........................................................................3-3
Figure 3-6: Overview of the Engineering Menu System ..............................................................3-4
Figure 3-7: Front Panel Time Indicators ......................................................................................3-9
Figure 3-8: Connections for Port Echo Mode.............................................................................3-19
Figure 3-9: Connections to Copy Captions between Video Feeds............................................3-20
Figure 3-10: Reinserting Captions after Video Processing........................................................3-20
Figure 3-11: 8084 Local Time to UTC Conversion Block Diagram............................................3-26
Figure 5-1: 8084AD Top Level Block Diagram ............................................................................5-1
Figure 5-2: Caption Processing Engine (Stream Mode)..............................................................5-2
Figure 5-3: Jumper Settings for Port A Configurations................................................................5-7
Figure 5-4: Port B or Port C Ribbon Cable Positions...................................................................5-8
Figure 5-5: Jumper Settings for Ports B and C............................................................................5-9
TablesTable 1-1: Closed Caption Encoder Feature Comparison...........................................................1-1
Table 3-1: Front Panel Data Monitoring in Stream Mode ..........................................................3-29
Table 5-1: DIP Switch Functions..................................................................................................5-6
Table 5-2: Keyboard Scan Codes................................................................................................5-9

Models 8084/8084AD/8085 Closed Caption Encoder Manual
Revision 1.6.6
CHAPTER 1: OVERVIEW
1 OVERVIEW..................................................................................................................................1-1
1.1 THE CLOSED CAPTION SYSTEM.............................................................................................1-2
1.2 FEATURES..................................................................................................................................1-3
1.2.1 Hardware System Features: ............................................................................................1-3
1.2.2 Serial Digital Video Path Features:..................................................................................1-4
1.2.3 Component Analog Video Path Features (8084AD only):................................................1-4
1.2.4 Data Encoding Features: .................................................................................................1-4
1.2.5 Communications Features:..............................................................................................1-4
1.2.6 Field Mode Operation: (Legacy Operation)......................................................................1-5
1.2.7 Stream Mode Operation:..................................................................................................1-5
1.3 DAYLIGHT SAVING TIME ADJUSTMENT.................................................................................1-5
1.4 HOW TO USE THIS MANUAL.................................................................................................... 1-6
1.5 GLOSSARY OF TERMS .............................................................................................................1-7
Figures
Figure 1-1: Typical Line 21 Closed Caption Signal......................................................................1-3
TablesTable 1-1: Closed Caption Encoder Feature Comparison...........................................................1-1

Models 8084/8084AD/8085 Closed Caption Encoder Manual
Revision 1.6.6
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Models 8084/8084AD/8085 Closed Caption Encoder Manual
OVERVIEW Revision 1.6.6 Page 1-1
1 OVERVIEW
This manual describes the operation of three different Closed Caption
Encoder products manufactured by Evertz Microsystems. These products
combine the capabilities our previous 807X caption encoder line with the
latest advances in processor and memory architecture.
The Model 8084 Digital Video Closed Caption Encoder provides a cost-
effective method of encoding closed captions into the digital video
bitstream. It has been designed to meet the needs of both television
broadcast and post-production facilities. The Model 8084AD Caption
Encoder adds the capability of inserting captions directly into a composite
video signal as well as a digital video bitstream. The Model 8085 DTV
Caption Encoder performs transcoding and translation to EIA-708
"advanced" captions, in addition to typical captioning functions.
Generally, all of the features noted are available on all caption encoder
models. Any exceptions are noted within the manual text.
The following table summarizes the major features and differences of the
Evertz closed caption products covered by this manual:
Feature 8084
(w/ 8038) 8084 (w/ 8058) 8084AD 8085
Front Panel 8 buttons 10 buttons 10 buttons 10 buttons
SDI Video 4:2:2 4:2:2 4:2:2 4:2:2
Analog Video N/A N/A composite N/A
Serial Ports 3 3 3 3
RS-232 / RS-422 Port A selectable all ports all ports all ports
Modems (14.4kbps) 1 or 2 1 or 2 1 or 2 1
Bypass Relay Yes Yes Yes - both feeds Yes
Power Supplies 1 or 2 1 or 2 1 or 2 1 or 2
Monitoring Decoder Yes Yes Yes - both feeds Yes
VBI Bridge Yes Yes Yes No
ATSC Comm. No No No Yes
XDS Insertion Yes Yes Yes Yes
WebTV URL Insertion Yes Yes Yes Yes
Text Article Insertion Yes Yes Yes Yes
Local Default V-Chip Yes Yes Yes No
LTC Reader No Optional Optional NO
Table 1-1: Closed Caption Encoder Feature Comparison

Models 8084/8084AD/8085 Closed Caption Encoder Manual
OVERVIEW Revision 1.6.6 Page 1-2
1.1 THE CLOSED CAPTION SYSTEM
The Closed Caption System provides for the transmission of data on line
21 of the NTSC composite signal, or Line 22 of the PAL composite video
signal. The EIA-608-B standard specifies nine data channels or “streams”
for line 21 data services. In each video field there are two caption streams
and two text streams. Field two also contains the Extended Data Service
(XDS) data stream. These are summarized in the chart below:
Field 1 Field 2
CC1 Primary Synchronous Caption Service CC3 Secondary Synchronous Caption Service
CC2 Special Non-synchronous Use Captions CC4 Special Non-synchronous Use Captions
T1 First Text Service T3 Third Text Service
T2 Second Text Service T4 Fourth Text Service
XDS Extended Data Services
The separate data streams are independent of each other in content.
Within each field, the streams are time-multiplexed. Control codes are
transmitted to announce the transition to a different stream. Home viewers
may generally select which data stream to display with their caption
decoders.
The primary Synchronous Caption Service (CC1) is primary language
captioning data that must be in sync with the sound. The Secondary
Synchronous Caption Service (CC3) is an alternate captioning data
channel in sync with the sound, usually used for a second language.
Software applications such as the Evertz ProCap™ can be used to send
caption data to the 8084. Contact the factory for further information on
ProCap.
The special Non-Synchronous channels (CC2, CC4) carry data that is
intended to augment information carried in the program and is not
necessarily in sync with the sound.
Throughout this manual, the designators CC1, CC2, CC3, and CC4 are
equivalent to C1, C2, C3, and C4 respectively.
The four text services are used to carry general text information that may
not be related to the program content. Text stream T2 is often reserved to
carry URL data for WebTV applications. A text article software loader
program is supplied on the CD that came with your 8084. It may be used
to conveniently upload text articles for insertion into one of the text
services.
Extended Data Service stream contains information about the program
such as program title, length, and V-Chip-compatible program rating
information. The XDS Packet Control Windows 9x software application
supplied on the CD with your 8084 provides a convenient method of
inserting XDS data. See the XDS quick start pamphlet supplied with the
software for information on installing the software on your PC.

Models 8084/8084AD/8085 Closed Caption Encoder Manual
OVERVIEW Revision 1.6.6 Page 1-3
IRE
-40
0
25
50
H Sync Color Burst Clock Run-In Start Bits
S1 S3S2 b0 b1 b2 b3
Character One
b4 b5 b6 P1 b0 b1 b2 b3 b4 b5 b6
Character Two
P2
Figure 1-1: Typical Line 21 Closed Caption Signal
Figure 1-1 shows the typical waveform of the signal. The line 21 data
signal consists of a 7 cycle sine wave clock burst, a start bit, and two data
characters. Each character consists of seven data bits with odd parity.
The clock rate is 32 times the horizontal line frequency or 503.4 KHz. The
signal amplitude is 50 IRE units peak to peak. There is no setup on the
line when the caption signal is present. When caption data is encoded into
field 2, there must at least be null characters encoded into field 1. The full
specification for the caption data waveform and data content is given in the
EIA-608-B standard.
1.2 FEATURES
1.2.1 Hardware System Features:
•3 RS-232 serial ports can be configured for direct connection to
captioning computer.
•One built-in modem and an optional second modem for connection to
remote captioning computers via the telephone network.
•Rack mountable chassis.
•16 digit alphanumeric display, with 8 push buttons.
•Parallel remote port for GPI control of six important 8084 functions.
•Real-time clock and calendar with battery backup.
•Flash ROM program memory for easy in-system-programmable
firmware upgrades.
•Optional redundant power supply.

Models 8084/8084AD/8085 Closed Caption Encoder Manual
OVERVIEW Revision 1.6.6 Page 1-4
1.2.2 Serial Digital Video Path Features:
•Keys directly into 4:2:2 (525 or 625 line) digital video bitstream.
•8 or 10 bit SDI video resolution supported.
•Serial digital video input provides automatic cable equalization on cable
lengths up to 200 meters of low loss coax such as Belden 8281.
•Two separate serial digital video outputs.
•Serial Digital Video bypass relay activates automatically on power
failure to maintain the integrity of the program video path.
•Analog composite monitor output with caption decoder provides a
means of verifying the caption information that is being encoded.
1.2.3 Component Analog Video Path Features (8084AD only):
•Keys directly into 1Vp-p component analog (525 or 625 line) video
signal.
•User may select either analog or SDI video path as upstream caption
source for data bridging applications.
•Captions may be encoded onto both video feeds simultaneously when
the feeds are frame-locked.
•Studio-quality video output with bypass relay protection.
•Monitor output with caption decoder that provides a means of verifying
the caption information that is being encoded.
•Video bypass relay activates automatically on power failure to maintain
the integrity of the program video path.
1.2.4 Data Encoding Features:
•Data can be encoded into all caption and text channels in both video
fields.
•Supports encoding of Extended Data Service (XDS) data packets
including V-Chip-compatible program ratings into Field 2
•Supports encoding of WebTV-compatible URLs into Text Channel 2.
•EDH packet checksum correction.
•Keyer bypass mode allows video to pass through without keying any
signal in
•Inserts Captions or Text articles into previously captioned material
using the versatile Stream Mode.
•Data encoding line is selectable – 11 to 25 in NTSC, 6 to 25 in PAL.
1.2.5 Communications Features:
•Serial communications protocol emulates EEG 270, EEG 370 and EEG
470 Encoders.
•Supports Real-time and off-line captioning methods.
•Monitor mode extracts caption data from video and sends it out the
serial port.
•Maximum compatibility with a wide variety of caption software
packages.

Models 8084/8084AD/8085 Closed Caption Encoder Manual
OVERVIEW Revision 1.6.6 Page 1-5
1.2.6 Field Mode Operation: (Legacy Operation)
•All the data streams in a particular field will be passed, removed, or
replaced with new data.
•Previously recorded captions in the same field will be removed.
•This mode is only suitable for encoding data on material that has not
been previously captioned.
1.2.7 Stream Mode Operation:
•Each individual data stream can be manipulated independent of the
other data streams.
•Incoming captions can be passed through on a channel by channel
basis, or replaced with new data.
•New caption data may be inserted into existing data streams.
In stream mode, the unit can store text articles and insert them in any of
the text streams on a repetitive basis. The user can program the frequency
and number of times each article will be inserted. These articles replace
any previously encoded data in the respective channels, and can be
simultaneously encoded along with real time caption data. The 8084(AD)
ships with a software utility to allow the user to load text articles easily.
In stream mode, the unit can also store Extended Data Service packets
and insert them in the XDS data stream on a repetitive basis. The user can
program the number of times each packet will be inserted. These packets
replace any previously encoded data in the XDS channel, and can be
simultaneously encoded along with real time caption data.
1.3 DAYLIGHT SAVING TIME ADJUSTMENT
Daylight Saving Time (DST) was instituted to take advantage of the later
hours of daylight between April and October. In 1966, the U.S. Congress
passed the Uniform Time Act that standardized the length of Daylight
Saving Time. For those parts of the United States that observe Daylight
Saving Time, it begins at 2 a.m. local time on the first Sunday of April.
Time reverts to standard time at 2 a.m. local time on the last Sunday of
October. In the spring clocks spring forward by 1 hour to 3 a.m.; in the fall
clocks fall back by 1 hour to 1 a.m. Arizona, Hawaii and most of Indiana
have chosen not to observe Daylight Saving Time.
People often consider daylight saving time to be an “event” that happens
twice a year, setting their clocks ahead or back by one hour. In reality,
DST is in effect (ON) for six months of the year and not in effect (OFF) for
the other six months, in regions that observe DST.

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OVERVIEW Revision 1.6.6 Page 1-6
The Caption Encoders will automatically switch their local time to Daylight
Saving time at 2 a.m. local time on the first Sunday of April, and back to
standard time at 2 a.m. local time on the last Sunday of October. The DST
Observed control allows the user to enable or disable the DST adjustment
of the local encoder time (the DSO flag). For regions that observe Daylight
saving time, the DST Observed setting must be set to On, and for regions
that do not observe Daylight saving time, the DST Observed setting must
be set to Off. Regardless of whether DST is observed in a region, DST will
be In effect between the first Sunday of April and the last Sunday of
October. (The DST flag) The front panel time display shows the status of
the DST and DSO flags as shown in Figure 3-7.
There are two XDS packets defined by EIA-608-B for encoding time and
date information. The Time of Day packet (0701) encodes the UTC time
and contains a flag bit (DST Flag) that is to be set when Daylight Saving
Time is in effect (i.e. between the first Sunday of April and the Last Sunday
of October). The Time of Day packet must be inserted locally at each
affiliate station so that the correct time is encoded when programs are aired
at different times across the network.
The Time Zone packet (0704) encodes the time zone offset from UTC time
and contains a flag bit (DSO Flag) that is to be set when the entire area
served by the signal observes Daylight Saving Time. When the DSO Flag
bit is set to Off, it means that the VCR will ignore the DST Flag bit in the
Time of Day packet. The Time Zone packet must be inserted locally at
each affiliate in order to encode the correct time zone offset for the region.
See application note AN3 at the back of this manual for more information
about encoding time in XDS packets.
1.4 HOW TO USE THIS MANUAL
This manual is organized into 6 chapters: Overview, Installation, Operation,
Serial Command Protocol, Technical Description, and Troubleshooting.
There are also two application notes in the rear of the manual.
If you are confused by any terminology used throughout the manual,
please refer to the Glossary of Terms in Chapter 1.
Some features described in the manual are specific to either the
8084,8084AD or 8085. Generally the text will identify which features are
applicable.
"Items of special note are indicated with a double box like this.