Wegener DTV 720 User manual

DTV720
Transport Stream Multiplexer
User’s Manual

DTV 720 User’s Manual
800043-01 Rev. B 2 wegener.com
A proven world leader in digital video, audio & broadcast data systems,
WEGENER’s management system is certified to ISO 9001:2000.
Data, drawings, and other material contained herein are proprietary to Wegener
Communications, Inc., and may not be reproduced or duplicated in any form
without the prior written permission of Wegener Communications, Inc.
The information contained herein is subject to change without notice. Revi-
sions may be issued to advise of such changes and/or additions.
 2004 Wegener Communications, Inc. All rights reserved.
WEGENER, and DTV720 are trademarks of WEGENER Communications,
Inc. All other trademarks are the property of their respective owners.
Correspondence regarding this publication,
800043-01 Revision B
Second Edition: October 2004
should be forwarded to:
Wegener Communications, Inc.
Technology Park/Johns Creek
11350 Technology Circle
Duluth, GA 30097-1502
Phone: [phone]
Fax: [phone]
The Wegener DTV720 is approved under FCC Part 15B Class A, UL1950, and
CSA.

wegener.com 3 800043-01 Rev. B
Table of Contents
Chapter 1 General Information
1.1 Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 DTV720 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 DTV720 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 1Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Safety Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Glossary of Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2Glossary of Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2 Installation
2.1 Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Location and Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.3 DTV720 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 3DTV720 Connector Details . . . . . . . . . . . . . . . . . . . . . . . . 15
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Terminal I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 3 Operation
3.1 Operation Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 Ethernet/Web Browser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Directly Connected PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 4DTV720 IP Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 5PC IP Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
LAN Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Using the Web Browser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Control and Status Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Stream Information Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Unit Configuration Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Pidsets Config Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Q&A/Help Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3 DTV720 Controls and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Liquid-Crystal Display(LCD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Front-panel LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 6LED Indicator Descriptions. . . . . . . . . . . . . . . . . . . . . . . . 27
Rear-panel Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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3.4 Front-panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Alarms/Warnings Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Clear Errored Seconds Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Input Setup Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Program Status Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Front Panel Timeout Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
IP Setup Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reset Unit Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Unit Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.5 Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Software Code Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Initialization Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Initialization Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.6 Transport Stream Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Input to Output Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
PSIP Structure and Program Selection . . . . . . . . . . . . . . . . . . . . . . . 36
IRT Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.7 Alarm and Warning System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Alarm Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Warning Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.8 Software Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chapter 4 Maintenance and Troubleshooting
4.1 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.2 General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
No Functions at All . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.3 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
ALARM: Input Missing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
ALARM: PAT or PMT Missing. . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.4 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
WARNING: Unit Over-subscribed . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.5 Trouble with Browser Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Chapter 5 Customer Service
5.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.2 Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Index

wegener.com 5 800043-01 Rev. B
Chapter 1 General Information
1.1 Manual Overview
This manual provides instructions and reference information for the proper
installation and operation of the Wegener Model DTV720 Transport Stream
Multiplexer, referred to throughout the manual as the DTV720.
NOTE: User interface details in this manual are based on application software
version 100.
The manual is divided into the following chapters:
1 General Information - a description of your DTV720, its functions and
specifications, and a glossary of terms
2 Installation - procedures and information for the correct and safe instal-
lation of your DTV720.
3 Operation - instructions on starting and operating your DTV720
4 Maintenance and Troubleshooting - information on maintaining your
DTV720 and resolving possible operating difficulties
5 Customer Service - Our warranty and information on obtaining help
An Index of keywords is also provided to help you quickly locate needed
information.
Please E-mail any suggestions or comments concerning this manual to
[e-mail]. If you prefer to post them through the mail, please
send your comments to the address below. If you have substantial or complex
changes to recommend, our preference is that you copy the page(s) in question,
mark your changes on that copy, and fax or mail us the copy. We always
appreciate constructive criticism.
Our Address:
Attn: Manuals
Wegener Communications, Inc.
Technology Park / Johns Creek
11350 Technology Circle
Duluth, GA 30097-1502
Our Fax Number:[phone]

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1.2 DTV720 Overview
The DTV720 Transport Stream Multiplexer (see Figure 1.1) receives up to two
input ASI MPEG transport streams and two ATSC 8VSB broadcast signals and
provides an output ASI stream (and optional DHEI stream) for connection to
cable system transmission equipment. Programs may be remapped or selected
for removal from the output stream. The transport stream that is output on the
DHEI connector is also available on the two ASI output BNC connectors.
Physical
Description The DTV720 is housed in a standard, rack-mountable chassis. Its front panel
provides a user interface through an LCD, eight LEDs, and six push buttons
(see section 3.3 DTV720 Controls and Indicators on page 26). The rear panel
holds the ports that allow connection to power, incoming signal, and peripheral
devices.
Figure 1.1 DTV720 Transport Stream Multiplexer
Features Your DTV720 has the following features:
• Two ATSC 8VSB RF inputs (F connector)
• Two ASI MPEG transport stream inputs – ASI-1 is active, ASI-2 may be
used for future expansion (BNC connectors)
• Two duplicate ASI MPEG Transport Stream outputs (BNC connectors),
• DHEI Output Module,
• Time re-stamping of PCR, PTS, and DTS information,
• User selection of input programs to be included in the output stream,
• User selection of output program numbers and audio mode,
• One Ethernet TCP/IP control interface (RJ-45 connector), and
• One asynchronous data input/output (DB-9 connector).

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1.3 DTV720 Specifications
Table 1: Technical Specifications
Characteristic Specification
ENVIROMENTAL
Use Indoor
Altitude Up to 2000 meters
Temperature Range 0°C to +50°C Operating
-20°C to +70°C Storage
Cooling Internal fan
Relative Humidity (max.) 80% for temperatures up to 31°C decreasing linearly to 50% rel-
ative humidity at 40°C.
INPUT AC POWER
Voltage 90 to 132 Vac and 175 to 264 Vac
Frequency 50/60 Hz ± 2%
Power Consumption 43 Watt
MECHANICAL
Height 1 std. RU (1.75 inches nominal) (44.5 mm)
Width EIA std. 19-inch mounting (482.6 mm)
Depth 13.5 inches (342.9 mm)
Weight 10.5 lb (4.81 kg)
Expansion Module Slots 3 - each 2.5"W x 1.375"H x 7"D on rear panel
SERIAL PORT
Standard RS-232
Handshaking None
Service Software download
Baud Rates 115.2 kbps
Formatting 8 data-bits, 1 start, 1 stop-bit, no parity

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1.4 Safety Summary
The DTV720 is designed for safe use with few special precautions required of
the user. The following items are basic precautions to use when installing and
working with your DTV720:
Do not open the DTV720’s chassis cover.
ETHERNET PORT
Physical Layer 10BaseT/100BaseT (twisted pair) on RJ-45 jack
Media Access and Link Layer Per IEEE 802.3 (Ethernet)
ALARM AND WARNING RELAYS
Alarm Function Contact closure for main power off, loss of expected input signal
Warning Function Contact closure for main power off, oversubscription, or input
stream with more than 1 error per 10 seconds
Type Form C, Normally Open and Normally Closed
Rating 30Vdc open circuit, 500 mA max current closed
EXPANSION MODULE SLOT Allowable expansion modules:
· DHEI transport stream output
· 8VSB tuner module
Table 1: Technical Specifications
Characteristic Specification

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1.5 Glossary of Terms and Abbreviations
Table 2: Glossary of Terms
Term Definition
AC Alternating current
Alarm A condition or notification of a condition that prevents your DTV720 from performing
properly
Application Soft-
ware The main host software which sets up the unit hardware, runs the process of acquiring Transport Stream sources, sets up and monitors the multiplexing processes, monitors unit
operations, and provides interfaces with the network and local users.
ASI (or DVB-ASI) An “asynchronous” bit-serial physical interface for Transport Streams. Transmitting and
receiving functions are designed such that the time relationships between all packets and
their timing references are unchanged.
ATSC Advanced Television Systems Committee - sets standards for standard definition and high
definition television in the U.S. Sometimes used to mean the HDTV standards.
Boot loader Software residing in non-writable zone of flash which executes at unit reset.
Carrier An RF signal containing coded audio, video, and/or other data
DVB-ASI see ASI
EIA Electronic Industries Association
Ethernet The widely-used LAN technology specified by IEEE standard 802.3
Flash memory A memory dedicated to storing the unit’s software and an image of some hardware pro-
gramming code.
IEEE Institute of Electrical and Electronics Engineers
LAN Local area network. Your DTV720 may be connected to an Ethernet LAN.
LCD
Liquid crystal display. The front-panel text screen on your DTV720 is a liquid crystal display.
LED Light-emitting diode. The front-panel indicator lights on your DTV720 are LEDs.
Mbps, kbps Megabits per second or kilobits per second - units of data transport rate.
MPEG Moving Picture Experts Group - refers to the method of video compression established by
this group.
NVRAM Non-volatile memory. A memory dedicated to storing the unit’s setup parameters. This
memory retains its contents through power outages.
PAT Program Allocation Table. Master table which identifies all the Programs in the Transport
Stream. It associates Program numbers to the PIDs bearing the associated Program’s PMT.
PCR Program Clock Reference. Time-base signal used to synchronize transport stream data.

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PID Packet Identifier. The unique Transport Stream packet identifier assigned to each constitu-
ent data stream within the Transport Stream. Also, in this document, “PID” is used to desig-
nate the stream itself.
PMT Program Map Table. Table for a given Program identifying all the PIDs for its PCR, video,
audio, and user data streams.
Program In the MPEG hierarchy, a grouping of related audio, video, or generic data PIDs sharing a
common PCR time base and (usually) sharing a common schedule. See PMT.
PSI Tables Program-Specific Information Tables. A group of information-bearing tables, each borne by
well-known PIDs, regularly transmitted in the Transport Stream. See also “PAT” and
“PMT”. Also, ISO 13818-1 gives a thorough description of these and other Tables.
PSIP Program and System Information Protocol - a method for transporting digital television sys-
tem information and electronic program guide data.
RAM Random access memory. A general term for all memory volatile memory types out of which
application software executes and into which its variables, state information, and messages
are stored. RAM is also used to designate the volatile storage used by the Transport Demux
and decompression devices.
RF Radio frequency
TMRA Maximum Recommended Ambient Temperature, the highest operating temperature for
which the unit is rated
Transport Stream
(or MPEG Trans-
port Stream)
A multiplex of several data streams, each of which is borne in Transport packets, 188-byte
blocks containing a sync word, header information (including a PID), and payload data.
This multiplex includes PSI data tables, Programs, and padding in the form of null packets.
Warning A condition or notification of a condition that may compromise the proper performance of
your DTV720
Table 2: Glossary of Terms
Term Definition