Tektronix RTX130B User manual

Service Manual
RTX130B
QAM & VSB RF Signal Generator
071-1935-03
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com

Copyright ©Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or
suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
HIn North America, call 1-800-833-9200.
HWorldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either
will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the
defective product. Batteries are excluded from this warranty. Parts, modules and replacement products used by Tektronix
for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become
the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, shipping charges prepaid, and
with a copy of customer proof of purchase. Tektronix shall pay for the return of the product to Customer if the shipment is
to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying
all shipping charges, duties, taxes, and any other charges for products returned to any other locations
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair
damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction
caused by the use of non--Tektronix supplies; or d) to service a product that has been modified or integrated with other
products when the effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX
AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES

RTX130B QAM & VSB RF Signal Generator Service Manual i
Table of Contents
General Safety Summary vii...................................
Service Safety Summary ix....................................
Environmental Considerations xi...............................
Preface xiii...................................................
Manual Structure xiii................................................
Manual Conventions xiv..............................................
Finding Other Information xiv.........................................
Introduction xv..............................................
Performance Check Interval xv........................................
Strategy for Servicing xv.............................................
Tektronix Service Offerings xvi........................................
Specifications
Product Overview 1-1.........................................
Specifications 1-3.............................................
Software Protection 1-3..............................................
Performance Conditions 1-3...........................................
Functional Specifications 1-4..........................................
Electrical Specifications 1-4...........................................
Mechanical (Physical) Characteristics 1-13................................
Environmental Characteristics 1-13......................................
Certifications and Compliances 1-14.....................................
Theory of Operation
A12 Main Board 2-1.................................................
A20 PCI Backplane Board 2-3.........................................
A180 QAM Modulator Board 2-4......................................
Front-Panel Processor Board 2-6.......................................
Keypad Board 2-7...................................................
A40 AC Distributor Board 2-7.........................................
Performance Verification
Connecting to a Network 3-1..........................................
Equipment Required 3-6..............................................
RTX130B Test Record 3-7............................................
Procedures 3-8......................................................

Table of Contents
ii RTX130B QAM & VSB RF Signal Generator Service Manual
Maintenance
Related Maintenance Procedures 4-1....................................
Preparation 4-2.....................................................
Inspection and Cleaning 4-3...........................................
Removal and Installation Procedures 4-7.........................
Preparation 4-7.....................................................
Access Procedure 4-14................................................
Procedures for External Modules 4-15...................................
Procedures for Board Modules 4-21......................................
Procedures for Internal Modules 4-26....................................
Verifying the BIOS Configuration 4-33...........................
Procedure 4-33......................................................
Troubleshooting 4-35...........................................
Troubleshooting Trees 4-35............................................
System Software Recovery 4-45..................................
Recovery Procedure 4-45..............................................
Using the Rescue Disk 4-47......................................
Recovery Procedure 4-47..............................................
Options
Diagrams
Replaceable Parts List
Parts Ordering Information 7-1.........................................
Using the Replaceable Parts List 7-3....................................

Table of Contents
RTX130B QAM & VSB RF Signal Generator Service Manual iii
List of Figures
Figure 1-1: Timing diagram of the SPI interface 1-12................
Figure 3-1: Pin connections for a crossover Ethernet cable 3-1.......
Figure 3-2: Network Connections window 3-2.....................
Figure 3-3: Local Area Connection Status dialog box 3-3............
Figure 3-4: Local Area Connection Properties dialog box 3-3........
Figure 3-5: Internet Protocol (TCP/IP) Properties dialog box 3-4.....
Figure 3-6: Equipment connection for checking the internal clock
output level 3-9............................................
Figure 3-7: Equipment connection for checking the internal clock
frequency 3-10.............................................
Figure 3-8: Equipment connection for checking the play
operation--SPI interface 3-11.................................
Figure 3-9: Equipment connections for checking the external
clock/reference and trigger inputs 3-15.........................
Figure 3-10: Equipment connection for checking the output
signal--ASI interface 3-18....................................
Figure 3-11: Equipment connections for checking the ASI play
operation 3-20.............................................
Figure 3-12: Equipment connection for checking the ASI record
operation 3-21.............................................
Figure 3-13: Equipment connection for checking the recorded
file--ASI interface 3-23.......................................
Figure 3-14: Equipment connection for verifying the 8VSB play
operation 3-24.............................................
Figure 3-15: Equipment connection for verifying the 8VSB record
operation 3-26.............................................
Figure 3-16: Equipment connection for verifying the recorded
file--SMPTE310M interface 3-27..............................
Figure 3-17: Equipment connection for checking the output for
errors 3-30................................................
Figure3-18:TestsGroupedbyPriority123screen(AnnexA) 3-32....
Figure 3-19: Equipment connection for checking the IEEE1394b
interface 3-34..............................................
Figure 3-20: Equipment setup for Option GbE performance
verification 3-40............................................
Figure 3-21: IP Playout Configuration dialog box 3-42...............
Figure 3-22: RTX130B MPEG Player display with 40.000000 Mbps 3-43

Table of Contents
iv RTX130B QAM & VSB RF Signal Generator Service Manual
Figure 3-23: Open Transport Stream dialog box 3-44................
Figure 3-24: Selecting the IP interface 3-45.........................
Figure 3-25: Interface settings 3-46...............................
Figure 3-26: IP Flow selection 3-47...............................
Figure 3-27: MTS400 Series TS Compliance Analyzer display 3-48....
Figure 3-28: Clock dialog box 3-49................................
Figure 3-29: RTX130B MPEG Player display with maximum
bit rate 3-50...............................................
Figure 3-30: MTS400 Series TS Compliance Analyzer display for
maximum bit rate 3-51......................................
Figure 4-1: RTX130B orientation 4-10.............................
Figure 4-2: External modules 4-11................................
Figure 4-3: Board modules 4-12..................................
Figure 4-4: Internal modules 4-13................................
Figure 4-5: Guide to removal procedures 4-14......................
Figure 4-6: Cabinet removal 4-16.................................
Figure 4-7: Right-side and left-side cover removal 4-17...............
Figure 4-8: Front-panel unit removal 4-18.........................
Figure 4-9: Disassembly of front-panel assembly 4-20................
Figure 4-10: A180 QAM Modulator board, A12 Main board,
CPU board, and A20 PCI Backplane board removal 4-22.........
Figure 4-11: Hard disk drive removal 4-27.........................
Figure 4-12: Internal and external fan removal 4-29.................
Figure 4-13: 12 V main power supply and A40 AC
Distributor board removal 4-31...............................
Figure 4-14: RFI filter removal 4-32..............................
Figure 4-15: Troubleshooting procedure (1) 4-36....................
Figure 4-16: Troubleshooting procedure (2) 4-37....................
Figure 4-17: Troubleshooting procedure (3) 4-38....................
Figure 4-18: Troubleshooting procedure (4) 4-39....................
Figure 4-19: Troubleshooting procedure (5) 4-40....................
Figure 4-20: Troubleshooting procedure (6) 4-41....................
Figure 4-21: Troubleshooting procedure (7) 4-42....................
Figure 4-22: Troubleshooting procedure (8) 4-43....................
Figure 4-23: A20 PCI Backplane board view--back side 4-43..........
Figure 4-24: A20 PCI Backplane board view--right side 4-44..........
Figure 6-1: RTX130B block diagram 6--3..........................
Figure 6-2: RTX130B interconnect diagram 6--5....................

Table of Contents
RTX130B QAM & VSB RF Signal Generator Service Manual v
Figure 7-1: Cabinet and covers 7-5..............................
Figure 7-2: Internal modules (1) 7-7.............................
Figure 7-3: Internal modules (2) 7-9.............................
Figure 7-4: Front-panel unit 7-11.................................
Figure 7-5: Cables 7-13.........................................

Table of Contents
vi RTX130B QAM & VSB RF Signal Generator Service Manual
List of Tables
Table 1-1: Functional specifications 1-4..........................
Table 1-2: Mainframe 1-4......................................
Table 1-3: Mechanical characteristics 1-13.........................
Table 1-4: Environmental characteristics 1-13......................
Table 1-5: Certifications and compliances 1-14.....................
Table 3-1: Equipment required for performance verification 3-6.....
Table 3-2: RTX130B test record 3-7.............................
Table 4-1: External inspection check list 4-4......................
Table 4-2: Internal inspection check list 4-5.......................
Table 4-3: Summary of procedures 4-8..........................
Table 4-4: Tools required for module removal 4-9..................

RTX130B QAM & VSB RF Signal Generator Service Manual vii
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
To Avoid Fire or
Personal Injury

General Safety Summary
viii RTX130B QAM & VSB RF Signal Generator Service Manual
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION.Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
CAUTION
Refer to Manual
WARNING
High Voltage
Protective Ground
(Earth) Terminal
Symbols and Terms

RTX130B QAM & VSB RF Signal Generator Service Manual ix
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, disconnect the mains power by means
of the power cord or, if provided, the power switch.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
xRTX130B QAM & VSB RF Signal Generator Service Manual

RTX130B QAM & VSB RF Signal Generator Service Manual xi
Environmental Considerations
This section provides information about the environmental impact of the
product.
Observe the following guidelines when recycling an instrument or component:
Equipment Recycling. Production of this equipment required the extraction and
use of natural resources. The equipment may contain substances that could be
harmful to the environment or human health if improperly handled at the
product’s end of life. In order to avoid release of such substances into the
environment and to reduce the use of natural resources, we encourage you to
recycle this product in an appropriate system that will ensure that most of the
materials are reused or recycled appropriately.
This symbol indicates that this product complies with the
European Union’s requirements according to Directive
2002/96/EC on waste electrical and electronic equipment
(WEEE). For information about recycling options, check
the Support/Service section of the Tektronix Web site
(www.tektronix.com).
Mercury Nortification. This product uses an LCD backlight lamp that contains
mercury. Disposal may be regulated due to environmental considerations. Please
contact your local authorities or, within the United States, the Electronics
Industries Alliance (www.eiae.org) for disposal or recycling information.
Perchlorate Materials. This product contains one or more type CR lithium
coin cell batteries. According to the state of California, CR lithium coin
cells are classified as perchlorate materials and require special handling. See
www.dtsc.ca.gov/hazardouswaste/perchlorate for additional information.
This product has been classified as Monitoring and Control equipment, and is
outside the scope of the 2002/95/EC RoHS Directive. This product is known to
contain lead, cadmium, mercury, and hexavalent chromium.
Product End-of-Life
Handling
Restriction of Hazardous
Substances

Environmental Considerations
xii RTX130B QAM & VSB RF Signal Generator Service Manual

RTX130B QAM & VSB RF Signal Generator Service Manual xiii
Preface
This is the service manual for the RTX130B QAM & VSB RF Signal Generator.
This manual contains information needed to service an RTX130B to the module
level.
Manual Structure
This manual is divided into sections, such as Specifications and Theory of
Operation. Furthermore, some sections are divided into subsections, such as
Product Description and Removal and Installation Procedures.
Sections containing procedures also contain introductions to those procedures.
Be sure to read these introductions because they provide information needed to
do the service correctly and efficiently. The following are brief descriptions of
each manual section.
HSpecifications contains a description of the RTX130B and the characteristics
that apply to it.
HTheory of Operation contains circuit descriptions that support service to the
module level.
HPerformance Verification contains procedures for confirming that an
RTX130B functions properly and meets warranted characteristics.
HMaintenance contains information and procedures for performing preventive
and corrective maintenance of an RTX130B. These instructions include
cleaning, module removal and installation, and fault isolation to the module
level.
HOptions contains descriptions of factory-installed options and field-upgrad-
able options.
HDiagrams contains the block diagram and interconnection diagram.
HReplaceable Parts List includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.

Preface
xiv RTX130B QAM & VSB RF Signal Generator Service Manual
Manual Conventions
This manual uses certain conventions with which you should become familiar.
Some sections of the manual contain procedures for you to perform. To keep
those instructions clear and consistent, this manual uses the following
conventions:
HNames of front panel controls and menus appear in the same case (initial
capitals, all uppercase, and so forth) in the manual as is used on the
RTX130B front panel and menus.
HInstruction steps are numbered unless there is only one step.
HBold text refers to specific interface elements that you are instructed to
select, click, or clear.
Example: Press the Menu button to open the File menu.
HItalic text refers to document names or sections. Italics are also used in
NOTES, CAUTIONS, and WARNINGS.
Example: The Diagrams section, beginning on page 6-1, includes a block
diagram and an interconnect diagram.
Throughout this manual, any replaceable component, assembly, or part of the
RTX130B is referred to generically as a module. In general, a module is an
assembly (like a circuit board), rather than a component (like a resistor or an
integrated circuit). Sometimes a single component is a module. For example, the
chassis of the RTX130B is a module.
Symbols and terms related to safety appear in the General Safety Summary and
Service Safety Summary near the beginning of this manual.
Finding Other Information
Other documentation for the RTX130B includes:
HThe RTX130B QAM & VSB RF Signal Generator User Manual (Tektronix
part number 071-1933-00) contains a tutorial to quickly describe how to
operate the RTX130B. It also includes an in-depth discussion on how to use
the RTX130B features.
Modules
Safety

RTX130B QAM & VSB RF Signal Generator Service Manual xv
Introduction
This manual contains information needed to properly service the RTX130B
QAM & VSB RF Signal Generator, as well as general information critical to safe
and effective servicing.
To prevent personal injury or damage to the RTX130B, consider the following
before attempting service:
HThe procedures in this manual should be performed only by a qualified
service person.
HRead the General Safety Summary and the Service Safety Summary,
beginning on page vii.
When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.
Performance Check Interval
Generally, the performance check described in Section 3, Performance Verifica-
tion, should be done every 12 months. In addition, a performance check is
recommended after module replacement.
If the RTX130B does not meet performance criteria, repair is necessary.
Strategy for Servicing
This manual contains all the information needed for periodic maintenance of the
RTX130B.
This manual also contains all information for corrective maintenance down to the
module level. To isolate a failure to a module, use the fault isolation procedures
found in Troubleshooting, part of Section 4, Maintenance. To remove and
replace any failed module, follow the instructions in Removal and Installation
Procedures, also part of Section 4. After isolating a faulty module, replace it
with a fully-tested module obtained from the factory. Section 7, Replaceable
Parts List, contains part number and ordering information for all replaceable
modules.

Introduction
xvi RTX130B QAM & VSB RF Signal Generator Service Manual
Tektronix Service Offerings
Tektronix provides service to cover repair under warranty as well as other
services that may provide a cost-effective answer to your service needs.
Whether providing warranty repair service or any of the other services listed
below, Tektronix service technicians are well trained to service the RTX130B.
They have access to the latest information on improvements to the RTX130B as
well as the latest new options.
Tektronix warrants this product for one year from date of purchase. The warranty
appears after the title page in this manual. Tektronix technicians provide
warranty service at most Tektronix service locations. The Tektronix product
catalog lists all worldwide service locations or you can visit our Web site for
service information: www.tektronix.com.
Tektronix supports repair to the module level by providing Module Exchange.
Module Exchange. This service reduces down-time for repair by allowing you to
exchange most modules for remanufactured ones. Each module comes with a
90-day service warranty.
For More Information. Contact your local Tektronix service center or sales
engineer for more information on any of these repair or adjustment services.
Warranty Repair Service
Self Service