UBS Axcera 6U4AD, HU5000BTD, CU1800BTD User Manual
INSTRUCTION MANUAL
Axciter
Digital
Modulator/Upconverter System
AXCERA, LLC
103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA
(724) 873-8100 • FAX (724) 873-8105
www.axcera.com • info@axcera.com
Digital ATSC Exciter-Modulator System Table of Contents
CHAPTER 1: INTRODUCTION...................................................................................................................... 1
MANUAL OVERVIEW.......................................................................................................................................... 1
AXCITER OVERVIEW .......................................................................................................................................... 1
SAFETY............................................................................................................................................................... 2
Read All Instructions..................................................................................................................................... 2
Retain Manuals.............................................................................................................................................. 2
Heed Notes, Warnings, and Cautions............................................................................................................2
Follow Instructions........................................................................................................................................ 2
Cleaning ........................................................................................................................................................ 2
Ventilation ..................................................................................................................................................... 2
Replacement Parts......................................................................................................................................... 3
RETURN MATERIAL PROCEDURE........................................................................................................................ 3
WARRANTY FOR BROADCAST PRODUCTS........................................................................................................... 4
Limited One-year Warranty........................................................................................................................... 4
CHAPTER 2: INSTALLATION AND OPERATING INSTRUCTIONS...................................................... 5
INSTALLATION.................................................................................................................................................... 5
SETUP AND OPERATION PROCEDURES.............................................................................................................. 10
MODULATOR OPERATIONAL OVERVIEW .......................................................................................................... 10
USER INTERFACE.............................................................................................................................................. 11
Navigating the User Interface ..................................................................................................................... 11
User Interface Conventions......................................................................................................................... 13
SCREEN DISPLAYS AND DETAILS...................................................................................................................... 15
Axciter Main Screen .................................................................................................................................... 15
Control and Status Screen........................................................................................................................... 16
Signals Status Screen................................................................................................................................... 17
Channel Offset Example.............................................................................................................................. 18
AXACT Equalizers....................................................................................................................................... 19
Clock and Power Status Screen................................................................................................................... 21
LED Status Screen....................................................................................................................................... 22
History......................................................................................................................................................... 24
DTVISION LINEAR - OPTIONAL....................................................................................................................... 25
DTVision Linear Home/ Spectrum Screen................................................................................................... 26
DTVision Constellation Screen.................................................................................................................... 27
DTVision Eye Screen................................................................................................................................... 28
Linear Equalizer Graph............................................................................................................................... 29
Linear Quad Display Screen ....................................................................................................................... 30
DTVISION NON-LINEAR - OPTIONAL ............................................................................................................... 31
DTVision Non-Linear Home/Spectrum Screen............................................................................................ 32
DTVision Peak to Average Screen............................................................................................................... 33
Nonlinear Phase Amplitude Display............................................................................................................ 34
Nonlinear Equalizer Display....................................................................................................................... 35
Nonlinear Quad Display Screen.................................................................................................................. 36
Upconverter Screen..................................................................................................................................... 37
Setup Screen ................................................................................................................................................ 39
CHAPTER 3: UPCONVERTER/DOWNCONVERTER TRAY OR MODULE ASSEMBLIES.............. 42
UPCONVERTER/DOWNCONVERTER TRAY AND MODULES OVERVIEW.............................................................. 42
UPCONVERTER/DOWNCONVERTER BOARD DESCRIPTIONS............................................................................... 43
Final Conversion Board, Axciter (1307263)............................................................................................... 43
L-Band PLL Board, Axciter (1307206) ....................................................................................................... 43
First Conversion Board, Axciter (1306759)................................................................................................ 44
AGC Control Board, Axciter (1307366)...................................................................................................... 44
Downconverter Board, Axciter (1306807) .................................................................................................. 46
Axcera Axciter, Rev. 0 i March 22, 2007
Digital ATSC Exciter-Modulator System Table of Contents
CHAPTER 4: AXCITER MODULATOR AND TRANSMITTER SET UP PROCEDURES................... 47
AXCITER ALIGNMENT OVERVIEW .................................................................................................................... 47
TRANSMITTER SET UP PROCEDURES................................................................................................................ 47
SYSTEM PREPARATION..................................................................................................................................... 47
INITIAL TEST SET UP ........................................................................................................................................ 47
SETTING UP THE OUTPUT POWER OF THE TRANSMITTER IN SLED-BASED SYSTEM.......................................... 48
SETTING UP OF AGC 1 ...................................................................................................................................... 48
SETTING UP OF AGC 2 ...................................................................................................................................... 48
SETTING UP OF OVERDRIVE THRESHOLD............................................................................................................ 48
(K2) AXCITER PRE AND POST FILTER SAMPLE VALUES.................................................................................. 49
UPCONVERTER DOWN CONVERTER ADJUSTMENT ............................................................................................... 49
SYSTEM CALIBRATION OF FORWARD AND REFLECTED POWERS USING THE HX OR LX DRIVER/AMPLIFIER, IN
SLED-BASED SYSTEMS..................................................................................................................................... 49
FORWARD POWER CALIBRATION ........................................................................................................................ 49
REFLECTED POWER CALIBRATION...................................................................................................................... 50
CHAPTER 5: MAINTENANCE...................................................................................................................... 51
MAINTENANCE................................................................................................................................................. 51
APPENDIX A: SYSTEM & MODULATOR DRAWINGS......................................................................... A-1
APPENDIX B: UPCONVERTER/DOWNCONVERTER TRAY DRAWINGS (USED WITH
VISIONARY IOT TRANSMITTERS ........................................................................................................... B-1
APPENDIX C: UPCONVERTER AND DOWNCONVERTER MODULE ASSEMBLY DRAWINGS
(USED WITH INNOVATOR LX & HX SERIES TRANSMITTERS) ...................................................... C-1
APPENDIX D: GLOSSARY OF TERMS..................................................................................................... D-1
Axcera Axciter, Rev. 0 ii March 22, 2007
Digital ATSC Exciter-Modulator System Chapter 1, Introduction
Chapter 1: Introduction
This manual explains the installation, setup, operation, alignment and
maintenance for the Axciter 8VSB digital television modulator. It is
intended that persons installing, operating, or maintaining the Axciter read
this manual for important safety and operational instructions.
Manual Overview
This instruction manual is divided in 5 chapters and four supporting
appendices. Chapter 1, Introduction, contains information on safety,
general maintenance, product return procedures, and warranties.
Chapter 2, Installation and Operating Instructions, describes the system
installation and setup of the Axciter. Chapter 3, Detailed Alignment,
contains alignment instructions for each circuit card that contains
alignment controls. Chapter 4, Upconverter/Downconverter Tray or
Module Assemblies, contains descriptions of the tray and module
assemblies and the boards and subassemblies that make up the tray and
module assemblies. Chapter 5, Maintenance, contains maintenance
instructions. Appendix A, System & Modulator Drawings, contains the
System Drawings for both the stand alone and the sled based Axciter
systems. Appendix B, Upconverter/Downconverter Tray Drawings,
contains the tray interconnect, board schematics and assembly drawings.
Appendix C, Upconverter and Downconverter Module Assembly
Drawings, contains the interconnects of the module assemblies, and the
schematics and assembly drawings of the boards that make up the
module assemblies. Appendix D contains a glossary of acronyms that is
provided for reference.
Axciter Overview
The Axciter represents the most up-to-date technology available in digital
television (DTV) modulators. The Axciter DTV exciter was designed to
address many of the problems facing digital television transmitter
engineers. The Axciter accepts SMPTE-310M encoded digital video and
performs all processing necessary to create an ATSC compatible RF output.
The exciter is equipped with high speed digital signal processing systems
that monitor not only the incoming digital video signal but the transmitted
signal as well. Critical information about the incoming digital video is
provided to aid in trouble-shooting the digital video chain leading up to the
exciter. On the output side, the Axciter monitors the RF output of the
transmitter power amplifier and automatically computes precorrection
information that is used to produce the highest quality over-the-air 8VSB
signal possible. This system is called Adaptive Digital Equalization and
throughout this manual is referred to as simply ADE. Optional software
called DTVision is available for viewing the performance of the adaptive
system directly on the self-contained color LCD of the Axciter.
While the Axciter performs all of these tasks automatically it is important to
understand how the Axciter operates. There are no controls inside the
Axciter due to its digital nature and it is quite likely that the transmitter
engineer will never have to even open the cover. Even so there are several
selections and options that must be made from the front panel of the
Axcera Axciter, Rev. 0 1
Digital ATSC Exciter-Modulator System Chapter 1, Introduction
Axciter. It is important to know what these selections do and when they
should be used. The Axciter is designed to work over a wide range of
transmitter types and field conditions. There are certain front panel
settings that if improperly selected could cause undesired results. Please
pay particular attention to any warnings or notes in this manual about
various selections to make sure that your transmitter is always operating at
its peak performance.
Safety
The digital modulators manufactured by Axcera are designed to be easy to
use and repair while providing protection from electrical and mechanical
hazards. Listed throughout the manual are notes, cautions, and warnings
concerning possible safety hazards that may be encountered while
operating or servicing the system. Please review these warnings and
familiarize yourself with the operation and servicing procedures before
working on the system.
Read All Instructions
All of the operating and safety instructions should be read and
understood before operating this equipment.
Retain Manuals
The manuals for the system should be retained at the transmitter
site for future reference. We provide two sets of manuals for this
purpose; one set can be left at the office while one set can be kept
at the site.
Heed Notes, Warnings, and Cautions
All of the notes, warnings, and cautions listed in this safety section
and throughout the manual must be followed for your safety and
optimum performance of this equipment.
Follow Instructions
All of the operating and use instructions for the system should be
followed.
Cleaning
Unplug or otherwise disconnect power from the equipment before
cleaning. Do not use liquid or aerosol cleaners. Use a damp cloth
for cleaning.
Ventilation
Openings in the back of the cabinet and tray front panel are
provided for ventilation. There is a small fan mounted near the rear
of the Axciter to pull cool air into the cabinet. To ensure reliable
operation, and to protect the unit from overheating, these openings
must not be blocked. Pay particular attention to the ventilation
holes in the bottom of the Axciter front panel. These holes are
placed in locations necessary to affect proper cooling of the highspeed digital circuits. They should not be blocked by equipment
placed directly below the Axciter. NOTE: Never operate the Axciter
for extended periods of time with the top cover removed. The top
cover is an integral component of the overall cooling system. If it is
Axcera Axciter, Rev. 0 2
Digital ATSC Exciter-Modulator System Chapter 1, Introduction
removed then the airflow will be altered such that some circuits do
not receive proper cooling.
Servicing
Do not attempt to service this product yourself until becoming
familiar with the equipment. If in doubt, refer all servicing questions
to qualified Axcera service personnel.
Replacement Parts
When replacement parts are used, be sure that the parts have the
same functional and performance characteristics as the original part.
Unauthorized substitutions may result in fire, electric shock, or other
hazards as well as improper operation. Please contact the Axcera
Technical Service Department if you have any questions regarding
service or replacement parts.
Return Material Procedure
To insure the efficient handling of equipment or components that have been
returned for repair, Axcera requests that each returned item be
accompanied by a Material Return Authorization Number (RMA#).
An RMA# can be obtained from any Axcera Field Service Engineer by calling
the Axcera Field Service Department, at 1-724-873-8100. This procedure
applies to all items sent to the Field Service Department regardless of
whether the item was originally manufactured by Axcera.
NOTE: To prevent damage to the product during shipping, Axcera will
supply a shipping container to the customer, upon request, at no cost.
When equipment is sent to the field on loan, an RMA# is included with the
unit. The RMA# is intended to be used for the return of the unit to Axcera.
In addition, all shipping material should be retained for the return of the
unit to Axcera. Replacement assemblies are also sent with an RMA# to
allow for the proper routing of the exchanged hardware. Failure to close
out this type of RMA# will normally result in the customer being invoiced for
the value of the loaner item or the exchange assembly.
When shipping an item to Axcera, please include the RMA# on the packing
list and on the outside of the shipping container. The packing slip should
also include contact information and a brief description of why the unit is
being returned.
Please forward all RMA items to:
Axcera, LLC
103 Freedom Drive
P.O. Box 525
Lawrence, PA 15055-0525 USA
For more information concerning this procedure, call the Axcera Field
Service Department, at 1-724-873-8100 or by fax at 1-724-873-8105.
Axcera can also be contacted through e-mail at info@Axcera.com and on
the Web at www.Axcera.com
Axcera Axciter, Rev. 0 3
Digital ATSC Exciter-Modulator System Chapter 1, Introduction
Warranty for Broadcast Products
Limited One-year Warranty
Axcera warrants each new product that it has manufactured and sold
against defects in material and workmanship under normal use and service
for a period of one (1) year from the date of shipment from Axcera’s plant,
when operated in accordance with Axcera’s operating instructions. This
warranty shall not apply to tubes, fuses, batteries, or bulbs.
Warranties are valid only when and if (a) Axcera receives prompt written
notice of breach within the period of warranty, (b) the defective product is
properly packed and returned by the buyer (transportation and insurance
prepaid), and (c) Axcera determines, in its sole judgment, that the product
is defective and not subject to any misuse, negligence, improper
installation, accident, or (unless authorized in writing by Axcera) repair or
alteration. Axcera’s exclusive liability for any personal and/or property
damage (including direct, consequential, or incidental) caused by the
breach of any or all warranties, shall be limited to the following: (a)
repairing or replacing (in Axcera’s sole discretion) any defective parts free
of charge (F.O.B. Axcera’s plant) and/or (b) crediting (in Axcera’s sole
discretion) all or a portion of the purchase price to the buyer.
Equipment furnished by Axcera, but not bearing its trade name, shall bear
no warranties other than the special hours-of-use or other warranties
extended by or enforceable against the manufacturer at the time of delivery
to the buyer.
NO WARRANTIES, WHETHER STATUTORY, EXPRESSED, OR IMPLIED, AND
NO WARRANTIES OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR
PURPOSE, OR FREEDOM FROM INFRINGEMENT, OR THE LIKE, OTHER THAN
AS SPECIFIED IN PATENT LIABILITY ARTICLES, AND IN THIS ARTICLE,
SHALL APPLY TO THE EQUIPMENT FURNISHED HEREUNDER.
Axcera Axciter, Rev. 0 4
Digital ATSC Exciter-Modulator System Chapter 2,
Downconverter
Sled
Upconverter
Sled
Driver PA Sled
Installation and Operating Instructions
Chapter 2: Installation and Operating Instructions
This section provides information on how to install and set up the Axciter
exciter system.
Installation
To install the Axciter stand alone tray system: If the trays are not pre-installed
in a cabinet, follow the steps below.
1. Remove the modulator tray and upconverter/downconverter tray from
the shipping boxes and inspect them for any damage that may have
occurred during shipment. Remove all packing material used in
shipment.
2. Install the tray slides that have been provided for the modulator and
the upconverter/downconverter trays into a standard 19" rack or
cabinet with the upconverter/downconverter tray slides located in a
convenient position, close to the Axciter. Slide the Axciter modulator
into the cabinet and adjust or align the tray so that it slides in and out
easily without interfering with cabling or other pieces of equipment.
Slide the upconverter/downconverter tray into the cabinet and adjust
or align the tray so that it slides in and out easily without interfering
with cabling or other pieces of equipment.
Note: Refer to Figures 2-4, 2-5 & 2-6 for the location of the rear panel
connections.
3. Connect the AC power cord, provided in the installation kit, to the AC
input jack, located on the rear of the Axciter modulator. Do not plug
the AC power cord into a source of power, at this time.
4. Connect another AC power cord to the IEC connector AC input jack,
located on the rear of the upconverter/downconverter. Do not plug the
AC power cord into a source of power, at this time.
To install the Axciter sled based system: If the tray and sleds are not pre-
installed in a cabinet and the chassis assembly, follow the steps below.
1. Remove the modulator tray and the upconverter and downconverter
sleds from the shipping boxes and inspect them for any damage that
may have occurred during shipment. Remove all packing material
used in shipment.
2. Install the tray slides that have been provided for the modulator into a
standard 19" rack or cabinet. Slide the Axciter modulator into the
cabinet and adjust or align the tray so that it slides in and out easily
without interfering with cabling or other pieces of equipment. Slide the
Downconverter Sled and the Upconverter Sled into chassis assembly,
as shown below.
Control/Power
Supply Sled
Figure 2-1: HX or LX Driver/Amplifier Chassis Assembly, Front View
Axcera Axciter, Rev. 0 5
Digital ATSC Exciter-Modulator System Chapter 2,
Installation and Operating Instructions
3. Connect the AC power cord, provided in the installation kit, to the AC
input jack, located on the rear of the Axciter modulator. Do not plug
the AC power cord into a source of power, at this time.
The following steps apply to the Axciter tray-based or sled-based system.
Figure 2- 2: Block Diagram Axciter tray-based system
Figure 2-3: Block Diagram Axciter sled-based system
1. Using the supplied cables and any other cables needed, make the
necessary interconnections between the Axciter modulator tray and the
upconverter/downconverter tray, in a tray-based system or the
driver/amplifier chassis assembly, in a sled-based system. Refer to
Figures 2-4, 2-5 & 2-6, the information in Tables 2-1, 2-2, 2-3 & 2-4
and the preceding block diagrams to aide in the reconnection of the
system.
2. The required external interconnections are detailed in Table 2-3.
Connect the SMPTE 310M signal source to the J27 or J23 input as
selected on the front panel of the Axciter modulator tray. This
connection applies to both the tray-based and sled-based systems
3. Connect the RF output of the upconverter/downconverter tray at J8 to
the driver or IPA of the transmitter, in a tray-based system. In a sledbased system, connect the RF output of the driver/amplifier chassis
assembly at J25 to the driver or IPA of the transmitter
Axcera Axciter, Rev. 0 6
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