Motorola OM 1000 User manual

Installation and
Operation Manual
OM 1000
Out-of-band Modulator
Software Version 3.5
TEST
-20dB POWER
DATA IN
EXT SYNC
PLL ERROR
RF ERROR
FAULT SUMM
OM 1000
ENT
MAIN: [INTFC] PORT NET ID
ADMIN CONTRAST> 6

Caution
These servicing instructions are for use by qualified personnel only. To reduce the risk of electrical shock, do not perform any servicing other
than that contained in the Installation and Troubleshooting Instructions unless you are qualified to do so. Refer all servicing to qualified service
personnel.
Special Symbols That Might Appear on the Equipment
This symbol indicates that dangerous voltage levels are present within the equipment. These voltages are not
insulated and may be of sufficient strength to cause serious bodily injury when touched. The symbol may also
appear on schematics.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important
installation, servicing, and operating instructions in the documents accompanying the equipment.
For continued protection against fire replace all fuses only with fuses having the same electrical ratings marked
at the location of the fuse.
Electrostatic discharge (ESD) can damage the unit and circuit card assemblies. Wear an antistatic wrist strap
attached to a chassis ground to prevent ESD damage.
This equipment operates over the marked Voltage and Frequency range without requiring manual setting of
any selector switches. Different types of line cord sets may be used for connections to the mains supply circuit
and should comply with the electrical code requirements of the country of use. This equipment requires a
grounding conductor in the line cord.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. THE APPARATUS
SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHALL BE
PLACED ON THE APPARATUS.
CAUTION: TO PREVENT ELECTRICAL SHOCK, IF THIS UNIT IS PROVIDED WITH A POLARIZED PLUG, DO NOT CONNECT THE PLUG
INTO AN EXTENSION CORD, RECEPTACLE, OR OTHER OUTLET UNLESS THE PLUG CAN BE FULLY INSERTED WITH NO PART OF
THE BLADES EXPOSED.
CAUTION: TO ENSURE REGULATORY AND SAFETY COMPLIANCE, USE ONLY THE PROVIDED POWER CABLES.
It is recommended that the customer install an AC surge arrestor in the AC outlet to which this device is connected. This is to avoid damaging the
equipment by local lightning strikes and other electrical surges.
FCC Compliance
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 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/her own expense. Any changes or modifications not
expressly approved by Motorola could void the user’s authority to operate this equipment under the rules and regulations of the FCC.
Canadian Compliance
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

FDA Compliance
This product meets the requirements of the Code of Federal Regulations, Title 21, Chapter I, Subchapter J, Sections 1010.2, 1010.3, 1040.10,
and 1040.11.
International Declaration of Conformity
We Motorola, Inc.
101 Tournament Drive
Horsham, PA 19044, U.S.A.
declare under our sole responsibility that the
Out-of-Band-Modulator Model OM 1000
to which this declaration relates is in conformity with one or more of the following standards:
EMC Standards
EN55022 EN55024 EN55013 EN50083-2 CISPR-22 CISPR-24 CISPR-13
Safety Standards
EN60065 EN60825 EN50083-1 EN60950 IEC 60950 + A1: 1992 + A2: 1993 + A3: 1995 + A4: 1996
IEC60065
following the provisions of the Directive(s) of the Council of the European Union:
EMC Directive 89/336/EEC Directive 93/68/EEC Low Voltage Directive 73/23/EEC
Use only main line cord that complies with the country’s product safety requirements.
Copyright © 2005 by Motorola, Inc.
All rights reserved. No part of this publication may be reproduced in any form or by any means or used to make any derivative work (such as
translation, transformation or adaptation) without written permission from Motorola, Inc.
Motorola reserves the right to revise this publication and to make changes in content from time to time without obligation on the part of Motorola
to provide notification of such revision or change. Motorola provides this guide without warranty of any kind, either implied or expressed,
including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Motorola may make improvements or
changes in the product(s) described in this manual at any time.
MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property
of their respective owners. © Motorola, Inc. 2005

Contents
Section 1
Introduction
Using this Manual ............................................................................................................................................................................1-2
Related Documentation...................................................................................................................................................................1-2
Document Conventions...................................................................................................................................................................1-2
If You Need Help...............................................................................................................................................................................1-3
Calling for Repairs...........................................................................................................................................................................1-4
Section 2
Overview
Functional Overview........................................................................................................................................................................2-2
OOB Signal Processing..........................................................................................................................................................2-2
Receiving OOB Data Inputs.............................................................................................................................................2-3
Multiplexing the OOB Data...............................................................................................................................................2-4
Inserting PID 0 and PID 1 Control Streams......................................................................................................................2-5
Generating the RF Output................................................................................................................................................2-6
Generating Serial Data Outputs.......................................................................................................................................2-6
Physical Overview............................................................................................................................................................................2-7
Controls and Indicators..........................................................................................................................................................2-8
Input/Output and Power Connections...................................................................................................................................2-9
Section 3
Installation
Before You Begin.............................................................................................................................................................................3-1
Mounting the OM 1000.....................................................................................................................................................................3-2
Connecting the Interface Cables....................................................................................................................................................3-3
Connecting Ethernet and Modulator Output Cables...........................................................................................................3-3
Connecting Optional Serial Port Cabling..............................................................................................................................3-4
Connecting the Optional Ground...................................................................................................................................................3-5
Connecting the Power Cable ..........................................................................................................................................................3-5
Confirming Correct Installation......................................................................................................................................................3-5
OM 1000 Installation and Operation Manual

ii Contents
Section 4
Setup and Operation
Using the Front-Panel Interface......................................................................................................................................................4-1
Menus ................................................................................................................................................................................................4-2
Factory Default Menu Settings........................................................................................................................................................4-3
MAIN Menu........................................................................................................................................................................................4-5
ADMIN Menu......................................................................................................................................................................................4-6
ADMIN Menu⎯Saving and Implementing Changes............................................................................................................4-7
ADMIN Menu⎯Rebooting the OM 1000................................................................................................................................4-7
ADMIN Menu⎯Purging the OM 1000 Software....................................................................................................................4-8
NTFC Menu⎯Modifying the Physical Port Default Settings .......................................................................................................4-9
INTFC 1 Menu⎯Viewing PORT 1 (RS-232 Console Port) Settings.....................................................................................4-10
INTFC 2 Menu⎯Setting Up PORT 2 (RS-530/RS-232)..........................................................................................................4-10
INTFC 3 Menu⎯Setting Up PORT 3 (Ethernet).....................................................................................................................4-10
INTFC 4/ INTFC 5 Menu⎯Setting Up Ports 4 and 5 (Optional RS-530/RS-232) ..............................................................4-11
INTFC 6 Menu⎯Setting Up PORT 6 (RF Modulator)............................................................................................................4-12
Spectrum Analyzer Procedure⎯Setting the Modulator Output Signal Level in Operate Mode.....................................4-15
Spectrum Analyzer Procedure⎯Setting the Modulator Output Signal Level in 2T Test Mode .....................................4-16
INTFC 7 Menu⎯Viewing the Internal MPEG Message Generator Port............................................................................4-17
Setting Up PID Maps ......................................................................................................................................................4-18
PORT Menu⎯Setting Up Logical Ports.......................................................................................................................................4-19
PORT Menu⎯Setting PID Maps (Input Ports Only)...........................................................................................................4-19
PORT Menu⎯Setting PID Maps for Ethernet Input Ports.............................................................................................4-20
PORT Menu⎯Setting PID Maps for Non-Ethernet Input Ports.....................................................................................4-23
PORT Menu⎯Setting Logical Non-Ethernet Input Ports..................................................................................................4-24
PORT Menu⎯Setting Receive Multicast IP Addresses (Logical Ethernet Input Ports Only)........................................4-26
PORT Menu⎯Setting Up Logical Ethernet Output Ports..................................................................................................4-28
NET Menu⎯Setting Up the Network............................................................................................................................................4-31
NET Menu⎯Setting Up OAM&P ..........................................................................................................................................4-32
NET Menu⎯Setting Up the CTRL (Control) Menu Options ..............................................................................................4-33
NET Menu⎯Setting Up SNMP .............................................................................................................................................4-36
Tracking Dropped Packets..............................................................................................................................................4-37
Tracking Discontinuous Packets (PID Basis) .................................................................................................................4-38
Tracking Discontinuous Packets (Overall PID Count)....................................................................................................4-38
ID Menu⎯Displaying Unit Data...................................................................................................................................................4-39
ID Menu⎯UNIT Menu Options.............................................................................................................................................4-40
ID Menu⎯SW (Software) Menu Options.............................................................................................................................4-42
ID Menu⎯LOC (Location) Menu Options ...........................................................................................................................4-43
OM 1000 Installation and Operation Manual

Contents iii
Section 5
Troubleshooting
Testing the RF Modulator................................................................................................................................................................5-3
Appendix A
Specifications
RF Output..........................................................................................................................................................................................A-1
IF Output...........................................................................................................................................................................................A-1
Electrical Specifications..................................................................................................................................................................A-1
Operating Environment...................................................................................................................................................................A-1
Physical Specifications...................................................................................................................................................................A-1
Performance Specifications............................................................................................................................................................A-2
Interconnection Specifications.......................................................................................................................................................A-2
Data (Bit) Rate ..................................................................................................................................................................................A-2
Appendix B
Cabling Specifications
RS-232 DB9 Interface Cabling (PORT2)...........................................................................................................................................B-1
DB25 RS-232 Interface Cabling (PORT 4and PORT 5- Optional Module)....................................................................................B-1
DB25 RS-530 Interface Cabling (PORT 4and PORT 5- Optional Module)....................................................................................B-3
Ethernet 10Base-T Interface Cabling.............................................................................................................................................B-4
Appendix C
Initialization Information
Self-Boot Option...............................................................................................................................................................................C-1
Download Option .............................................................................................................................................................................C-1
BOOTP Request and Reply Format.......................................................................................................................................C-2
BOOTP Request...............................................................................................................................................................C-2
BOOTP Server Reply.......................................................................................................................................................C-2
Boot File (FOF) Format...........................................................................................................................................................C-3
Hosts File Format.............................................................................................................................................................C-6
Services File Format.........................................................................................................................................................C-7
The Service Name File.....................................................................................................................................................C-8
The Gateway File .............................................................................................................................................................C-9
The Operate Directory......................................................................................................................................................C-9
OM 1000 Installation and Operation Manual

iv Contents
Glossary
Abbreviations and Acronyms Glossary-1
Definitions of Terms...........................................................................................................................................................Glossary-3
Figures
Figure 1-1 OM 1000...........................................................................................................................................................................1-1
Figure 2-1 OM 1000 operational flow diagram...............................................................................................................................2-1
Figure 2-2 OOB data flow through the OM 1000............................................................................................................................2-2
Figure 2-3 Creating an output multiplex.........................................................................................................................................2-5
Figure 2-4 RF modulator block diagram........................................................................................................................................2-6
Figure 2-5 OM 1000 dimensions......................................................................................................................................................2-7
Figure 2-6 OM 1000 front panel.......................................................................................................................................................2-8
Figure 2-7 Rear-panel.......................................................................................................................................................................2-9
Figure 3-1 Rack mounting ...............................................................................................................................................................3-2
Figure 3-2 OM 1000 Ethernet and modulator output connection ................................................................................................3-3
Figure 3-3 OM 1000 optional serial and interface output connection.........................................................................................3-4
Figure 4-1 Sample OM 1000 configuration menu..........................................................................................................................4-1
Figure 4-2 OM 1000 MAIN menu.....................................................................................................................................................4-5
Figure 4-3 ADMIN menu..................................................................................................................................................................4-6
Figure 4-4 INTFC menu...................................................................................................................................................................4-9
Figure 4-5 INTFC 3 ENET menu....................................................................................................................................................4-10
Figure 4-6 RCV MCAST menu ......................................................................................................................................................4-11
Figure 4-7 Setting up the RF modulator......................................................................................................................................4-12
Figure 4-8 RF modulator setup menu..........................................................................................................................................4-13
Figure 4-9 Setting up the internal MPEG message generator port...........................................................................................4-17
Figure 4-10 Internal MPEG message generator port display menu..........................................................................................4-18
Figure 4-11 Setting PID maps for Ethernet input ports .............................................................................................................4-20
Figure 4-12 PORT setup menu.....................................................................................................................................................4-21
Figure 4-13 PORT-PIDTBL Config/Erase menu ..........................................................................................................................4-22
Figure 4-14 Setting PID map for non-Ethernet input ports........................................................................................................4-23
Figure 4-15 PIDTBL setup menu..................................................................................................................................................4-24
Figure 4-16 Setting up logical Ethernet input port multicast receive IP addresses...............................................................4-26
Figure 4-17 Multicast receive IP Address menu.........................................................................................................................4-27
Figure 4-18 Setting up logical Ethernet output port ..................................................................................................................4-28
Figure 4-19 Logical Ethernet output port menu.........................................................................................................................4-29
OM 1000 Installation and Operation Manual

Contents v
Figure 4-20 Logical Ethernet destination IP address menu .....................................................................................................4-30
Figure 4-21 NET port setup menu ...............................................................................................................................................4-31
Figure 4-22 Setting up OAM&P....................................................................................................................................................4-32
Figure 4-23 OAM&P menu............................................................................................................................................................4-32
Figure 4-24 Setting up CTRL........................................................................................................................................................4-33
Figure 4-25 Control Status menu ................................................................................................................................................4-34
Figure 4-26 CTRL menu................................................................................................................................................................4-35
Figure 4-27 Setting up SNMP.......................................................................................................................................................4-36
Figure 4-28 SNMP port setup menu............................................................................................................................................4-36
Figure 4-29 ID menu......................................................................................................................................................................4-39
Figure 4-30 UNIT menu.................................................................................................................................................................4-40
Figure 4-31 Extended UNIT menu................................................................................................................................................4-41
Figure 4-32 SW menu....................................................................................................................................................................4-42
Figure 4-33 LOC menu..................................................................................................................................................................4-43
Figure C-1 Sample FOF file.............................................................................................................................................................C-4
Figure C-2 Sample hosts file.......................................................................................................................................................C-6
Figure C-3 Sample services file......................................................................................................................................................C-7
Figure C-4 Sample service name file .............................................................................................................................................C-8
Figure C-5 Sample gateway file......................................................................................................................................................C-9
Figure C-6 Sample operate.txt file..................................................................................................................................................C-9
Tables
Table 2-1 OM 1000 input ports........................................................................................................................................................2-3
Table 2-2 Multiplexer output destinations.....................................................................................................................................2-4
Table 2-3 OM 1000 front panel RF monitor jack, controls, and indicators................................................................................2-8
Table 2-4 OM 1000 input/output and power connections...........................................................................................................2-9
Table 4-1 Menus..............................................................................................................................................................................4-2
Table 4-2 MAIN menu options........................................................................................................................................................4-5
Table 4-3 ADMIN menu options.....................................................................................................................................................4-6
Table 4-4 Configuring the physical ports.....................................................................................................................................4-9
Table 4-5 Ethernet interface menu options................................................................................................................................4-11
Table 4-6 RF modulator setup menu options.............................................................................................................................4-14
Table 4-7 Correction factors for modulator output power measured in OPERATE mode ....................................................4-16
Table 4-8 Internal MPEG generator port setup menu options..................................................................................................4-18
Table 4-9 Example of PID table....................................................................................................................................................4-19
Table 4-10 Logical port setup menu options..............................................................................................................................4-21
Table 4-11 PORT-PIDTBL Config/Erase menu options.............................................................................................................4-22
Table 4-12 PID table setup menu options...................................................................................................................................4-24
OM 1000 Installation and Operation Manual

vi Contents
Table 4-13 Logical Ethernet input port multicast receive IP address menu options..............................................................4-27
Table 4-14 Logical Ethernet output port menu options.............................................................................................................4-29
Table 4-15 Logical Ethernet destination IP address menu options .........................................................................................4-30
Table 4-16 NET port setup menu options....................................................................................................................................4-31
Table 4-17 OAM&P menu options................................................................................................................................................4-33
Table 4-18 Control Status menu fields........................................................................................................................................4-34
Table 4-19 CTRL menu options....................................................................................................................................................4-35
Table 4-20 SNMP menu options...................................................................................................................................................4-37
Table 4-21 ID menu options..........................................................................................................................................................4-39
Table 4-22 UNIT menu options.....................................................................................................................................................4-40
Table 4-23 Extended UNIT menu options....................................................................................................................................4-41
Table 4-24 Software menu options..............................................................................................................................................4-42
Table 4-25 LOC menu options......................................................................................................................................................4-43
Table 5-1 LED status indicators......................................................................................................................................................5-1
Table 5-2 Common fault indications...............................................................................................................................................5-2
Table 5-3 Modulator port testing modes........................................................................................................................................5-3
Table B-1 RS-232 DB9 Interface Connector Pinout.....................................................................................................................B-1
Table B-2 DB25 RS-232 interface connector pinout ....................................................................................................................B-2
Table B-3 DB25 RS-530 interface connector pinout ....................................................................................................................B-3
Table B-4 Ethernet 10Base-T interface connector pinout...........................................................................................................B-4
OM 1000 Installation and Operation Manual

Section 1
Introduction
The Motorola OM 1000 Out-of-band Modulator links the digital headend equipment with the
distribution system by combining the various out-of-band inputs into a quadrature phase shift
key (QPSK)-modulated signal. It converts multiple digital input streams into a RF output signal
for transmission over the cable system.
Figure 1-1 illustrates the OM 1000:
Figure 1-1
OM 1000
TEST
-20dB POWER
DATA IN
EXT SYNC
PLL ERROR
RF ERROR
FAULT SUMM
OM 1000
ENT
The OM 1000:
Receives Ethernet User Datagram Protocol (UDP) packets from a controlling processor
Multiplexes downstream data from multiple sources
Provides forward error correction (FEC) encoding of the bitstream, as well as interleaving
and randomization
Provides downstream QPSK-modulated output within the 71 to 129 MHz range
Provides industry-standard Ethernet 10Base-T connectivity for operation, administration,
maintenance, and provisioning (OAM&P)
Performs periodic insertion of internally stored messages
Controls and provides status/alarm reporting using Simple Network Management Protocol
(SNMP)
OM 1000 Installation and Operation Manual

1-2 Introduction
Using this Manual
The following sections provide information and instructions to install, configure, and operate the
OM 1000:
Section 1 Introduction provides a product description, related documentation, the technical helpline,
and repair/return information.
Section 2 Overview describes functions of the OM 1000.
Section 3 Installation provides instructions on how to install the OM 1000.
Section 4 Setup and Operation provides instructions on how to set up and operate the OM 1000.
Section 5 Troubleshooting provides problem solving, testing, and maintenance information.
Appendix A Specifications provides the technical specifications for the OM 1000.
Appendix B Cabling Specifications provides cabling requirements.
Appendix C Initialization Information provides special information on the OM 1000 initialization
process, such as BOOTP.
Glossary The Glossary provides the full spelling of abbreviations and acronyms and definitions of the
special terms used in this manual.
Related Documentation
Although these documents provide information that may be of interest to you, they are not
required to install or operate the OM 1000:
C6U Commander 6®Upconverter Installation Manual
HCT 1000 Headend Configuration Tool (HCT) User Guide
Document Conventions
Before you begin using the OM 1000, familiarize yourself with the stylistic conventions used in
this manual:
SMALL CAPS Denotes silk screening on the equipment, typically representing front and rear-panel
controls, input/output (I/O) connections, and LEDs
* (asterisk) Indicates that several versions of the same model number exist and the information
applies to all models; when the information applies to a specific model, the complete
model number is given
Italic type Used for emphasis
Courier font Displayed text
Bold Indicates text you must type exactly as it appears, a selection item, or a default value.
OM 1000 Installation and Operation Manual

Introduction 1-3
If You Need Help
If you need assistance while working with the OM 1000, contact the Motorola Technical
Response Center (TRC):
Inside the U.S.: 1-888-944-HELP (1-888-944-4357)
Outside the U.S.: 215-323-0044
Motorola Online: http://businessonline.motorola.com
The TRC is on call 24 hours a day, 7 days a week. In addition, Motorola Online offers a
searchable solutions database, technical documentation, and low-priority issue creation and
tracking.
http://businessonline.motorola.com888-944-4357 / 215-323-0044 / 888-944-HELP
Data Networks/
Transmission Products
PRESS 3
Products
PRESS 1
Cable Router VOIP
PRESS 2
Cable Modems Products
PRESS 3
Transmission Transport
Products
(MBT/MWT/MEA)
PRESS 5
Multiservice
Management
PRESS 4
Network
Licensing
PRESS 1
Network Management
Products
PRESS 2
Network
Technical Response Center
Telephone Menu Options
Video Products
PRESS 1
Issued: 06/2004
Consumer
Support
PRESS 4
Broadcaster,
Satellite IRD or
Encoder Products
PRESS 2
Severity Level
1 - Critical Failure
2 - Serious Failure
3 - Non-Serious Failure
4 - Escalated Support
5 - Technical Assistance
PRESS 3
Settops
PRESS 2
Headend
PRESS 1
Controllers
PRESS 2
Analog
PRESS 1
Digital
IRD
PRESS 1
Commercial Encoder
PRESS 2
Uplink
Modem
PRESS 2
Cable PRESS 3 DCP
Satellite
C Band
PRESS 1
Consumer
OM 1000 Installation and Operation Manual

1-4 Introduction
Calling for Repairs
If repair is necessary, call the Motorola Repair Facility at 1-800-642-0442 for a Return for
Service Authorization (RSA) number before sending the unit. The RSA number must be
prominently displayed on all equipment cartons. The Repair Facility is open from 7:00 AM to
4:00 PM Pacific Time, Monday through Friday.
When calling from outside the United States, use the appropriate international access code and
then call 52-631-311-1100 to contact the Repair Facility.
When shipping equipment for repair, follow these steps:
1Pack the unit securely.
2Complete and enclose the checklist provided with the unit.
3Enclose a copy of the invoice that verifies the warranty status.
4Ship the unit PREPAID to the following address:
Motorola, Inc.
Broadband Communications Sector
c/o Excel
Attn: RSA #_________
6908 East Century Park Drive
Suite 100
Tucson, AZ 85706
OM 1000 Installation and Operation Manual

Section 2
Overview
The Motorola OM 1000 creates a QPSK-modulated signal to carry the out-of-band (OOB)
datastream of a digital CATV system from the headend set-tops installed in subscribers’ homes.
The OOB datastream is the control link through which the headend transmits the commands
and authorization messages that control the set-tops distributed throughout the CATV system.
The headend can also use the OOB datastream to deliver other types of information, including:
Electronic program guide (EPG) information
Application code downloads
Control messages for emergency situations
Data services
Executable code downloads to fix or upgrade cable terminal operation
Other devices in the headend create the specific commands, messages, and downloadable code
that make up the information contained in the OOB datastream. The OM 1000 accepts this
information and processes it for delivery on the OOB channel by combining it into a Motion
Picture Expert Group-2 (MPEG-2) compliant transport multiplex and outputting that transport
multiplex as an RF signal. Other output formats are also available to support specific
application requirements.
Figure 2-1 illustrates the operational flow through the OM 1000:
Figure 2-1
OM 1000 operational flow diagram
OM 1000
Cable terminal
control messages
EPG information
Code downloads
Out-of-band (OOB)
data inputs Out-of-band tranport
multiplex (OBTM)
Multiplexed
data stream
Data services
OM 1000 Installation and Operation Manual

2-2 Overview
Functional Overview
The primary function of the OM 1000 is to combine multiple OOB data inputs into a single
datastream that is transmitted over the OOB channel as an RF signal. The OM 1000 also
provides serial data communications to transmit and receive baseband digital data over various
serial data ports.
OOB Signal Processing
In converting the OOB data inputs into an RF signal, the OM 1000 performs the following OOB
signal processing functions:
Receives the cable terminal control stream and other OOB data from multiple input
sources.
Multiplexes the information into a single, packet-based, MPEG-2-compliant transport
stream.
Inserts Packet Identifier 0 (PID 0) and PID 1 control streams into the transport stream if
necessary.
Modulates the digital transport stream onto a 1.5 MHz-wide RF carrier using QPSK
modulation.
Upconverts the resulting signal into an RF output with a center frequency in the
71 through 129 MHz range. (An IF output is available for optional external upconversion to
other frequencies.)
Figure 2-2 shows the typical flow of OOB data from the input port(s) through the packet
multiplexer to the RF modulator:
Figure 2-2
OOB data flow through the OM 1000
RF
out
OOB
data
PID0/PID1 data
(if necessary)
Packet
multiplexing
Ethernet
RS-232
RS-530
Ethernet
UDP/IP
TCP/IP
RF
modulation
and upconversion
Message storage
and packet
generation
OM 1000 Installation and Operation Manual

Overview 2-3
Receiving OOB Data Inputs
The OM 1000 can receive OOB data through multiple input ports. All data ports are located on
the back panel and each has a unique numeric identifier. Table 2-1 describes the OM 1000 input
ports:
Table 2-1
OM 1000 input ports
Port Type Description
RS-232 DB9
serial data A standard RS-232 serial data port (asynchronous only) receives EPG information,
code download, and other OOB data types. In some systems, an RS-232 port is
configured to receive cable-terminal control-stream information instead of, or in
conjunction with, the Ethernet port.
Ethernet The standard Ethernet port is the primary input to the OM 1000. Because it is an
Ethernet connection, it supports communication with multiple devices over the same
physical port.
Generator port The MPEG message generator is a virtual input-only port that supplies MPEG
messages at periodic intervals to the output ports configured by the datapipe. The
control interface sets the insertion interval, availability status, and the message data.
RS-232 or RS-530
DB25 serial data The optional RS-232 and/or RS-530 serial data ports are expansion ports. These
ports are used in the same way as the RS-232 serial port and can be configured for
input or output operation. Refer to the operate.txt file in Appendix C, “Initialization
Information” for configuration information.
In general, OOB data input to the OM 1000 must be in MPEG-2 transport packets. Data sent to
configure, control, and boot the OM 1000 need not conform to MPEG-2 format.
OM 1000 Installation and Operation Manual

2-4 Overview
Multiplexing the OOB Data
The packet multiplexer combines OOB data from the Ethernet and serial input ports into a
single MPEG-2-compliant transport multiplex, and then routes this multiplex to the RF
modulator. The multiplexer can also accept input data from special internal sources (for
example, PID 0 and PID 1 control data) if necessary.
CAUTION
The aggregate input rate of all data to be combined into the RF output must not exceed 2.005 Mbps. If the rate is lower
than 2.005 Mbps, the multiplexer will add null packets to achieve the correct data rate. If the aggregate input rate is
higher than 2.005 Mbps, the multiplexer will drop packets.
The main destination for most OOB data is the RF modulator; however, the multiplexer can
route data to other output destinations. Each input packet stream can be routed to up to three
different output destinations. Table 2-2 lists the available destinations:
Table 2-2
Multiplexer output destinations
Destination Description
RF modulator The RF modulator uses QPSK modulation to convert an MPEG-2-compliant transport
multiplex into a 1.5 MHz-wide RF signal with a center frequency from
71 through 129 MHz. Data directed to this destination is output from the RF OUT and
IF OUT connectors on the OM 1000 back panel.
Serial data ports Data directed to a serial data port is output as a serial datastream. The serial data
ports are valid destinations only when configured as output or bi-directional ports.
User Datagram
Protocol (UDP)
connections over
the Ethernet port
Data directed to a UDP port is output as a serial datastream. The UDP connections
are valid destinations only when configured as output ports. A legal UDP port number
must be assigned to each connection, and the IP address of the receiving device must
be configured.
Null port The null port is a conceptual destination equivalent to routing a packet to nowhere
(that is, discarding the packet).
Because of the number of possible input sources and output destinations, the OM 1000 relies on
a collection of data-handling specifications called PID maps to support the proper multiplexing
and routing of data through the packet multiplexer. One set of PID maps is defined for each
input port to control how the multiplexer handles packets from those streams. Within the set
for a port, a single PID map controls the handling of one packet stream, and each set includes a
default PID map to control the handling of packet streams having no explicit PID mapping.
The multiplexer uses a queuing scheme to transfer packets from input ports to output buffers.
Each destination has a dedicated queue composed of multiple data buffers set up to handle
packets from particular input packet streams. As an input packet enters a given input port, the
packet multiplexer reads the stream PID map and transfers the packet to the correct output
destination queue. To generate the output multiplex for a given destination, the multiplexer
extracts packets from the destination queue by taking one packet from each buffer in a
round-robin fashion.
OM 1000 Installation and Operation Manual

Overview 2-5
Figure 2-3 illustrates how the packet multiplexer uses a destination queue to create an output
multiplex:
Figure 2-3
Creating an output multiplex
RF modulator
queue
A
B
C
Input stream B
BB
Input stream C
C
Input stream A
AA
Output multiplex
BACBA
In this example, the multiplexer routes three different input packet streams labeled A, B, and C
to the RF modulator for output. As a packet from stream A enters the queue, the multiplexer
transfers it to its associated buffer in the RF modulator destination queue. The multiplexer
handles packets from streams B and C in the same way.
The multiplexer then builds the output multiplex for the RF modulator by extracting packets
from each buffer in the RF modulator queue in sequence (that is, one packet from the A buffer,
one from the B buffer, and so on).
The input devices that supply the data control the PID numbers assigned to incoming packet
streams. As a result, it is possible that packet streams received from two different devices use
the same PID number. To avoid collision of these packets when multiplexed for output, the
OM 1000 re-assigns the PID numbers of streams routed to the same destination. PID numbers
can be re-assigned to any value or left unchanged, as necessary, to guarantee PID uniqueness in
the output. PID number re-assignment for a packet stream is defined in the PID map for that
stream.
Inserting PID 0 and PID 1 Control Streams
Depending on your system configuration, the Digital Consumer Terminal (DCT) control-stream
input to the OM 1000 can include the PID 0 and PID 1 control streams required to define the
OOB transport multiplex. If not, these streams are added to the multiplex before it is input to
the RF modulator.
The internal MPEG message stores the PID 0 and PID 1 control streams received from the
DAC 6000 and inserts packets containing messages from these streams into the multiplexer at
defined intervals. The messages are input to the internal MPEG message generator through the
Ethernet and they include data to PID 0 and PID 1 packets, as well as commands specifying
how often the generator should insert the packets into the multiplexer.
OM 1000 Installation and Operation Manual

2-6 Overview
Generating the RF Output
The RF modulator receives the OOB data transport multiplex created by the packet multiplexer
and performs the following functions to convert it for RF transmission:
Forward error correction
(FEC) encoding An FEC encoder performs Reed/Solomon encoding, data interleaving, and data
randomization to reduce transmission errors.
QPSK modulation A QPSK modulator converts the digital information in the OOB transport
multiplex into a synthesized analog waveform. The waveform is a 1.5 MHz-wide
signal with a carrier frequency centered at 44 MHz (IF).
Frequency upconversion A frequency-agile converter processes the QPSK-modulated 44 MHz IF signal
to an RF output frequency configurable from 71 through 129 MHz.
Figure 2-4 shows a block diagram of the RF modulator:
Figure 2-4
RF modulator block diagram
From packet
multiplexer RF
71-129 MHz
IF
44 MHz
To RF
distribution
system
To RF
converter
Frequency
converter
QPSK
modulator
FEC
encoder
Generating Serial Data Outputs
Depending on the routing, multiplexing, and PID re-assignment definitions contained in the
PID maps, the packet multiplexer directs input packets to serial data port destination queues
and multiplexes them into output datastreams in the same way it routes and multiplexes data
for the RF modulator.
Serial data ports must be configured as output ports to be valid output destinations.
OM 1000 Installation and Operation Manual

Overview 2-7
Physical Overview
The OM 1000 chassis mounts in a standard 19-inch equipment rack in a digital headend,
network hub office, or network end office. It occupies one rack unit (1.75 vertical inches) and
requires a blank panel with one rack unit of space above and below it for cooling airflow.
Figure 2-5 illustrates the OM 1000 and its physical dimension:
Figure 2-5
OM 1000 dimensions
1.75"
17.00"
17.00"
19.00"
Refer to Appendix A, “Specifications” for complete physical, electrical, and environmental
specifications.
OM 1000 Installation and Operation Manual