Tektronix RTX130B Service Manual

Service Manual

RTX130B QAM & VSB RF Signal Generator

071-1935-00

Warnin g

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 treat y provisions.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication superc edes 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:

H In North America, call 1-800-833-9200.

H Worldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2

Tektronix warrants that this product will be free from defe cts 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 t he 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 be en modified or integrated with other products when the effect of such modification or integration i ncreases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER W ARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED W ARRANTIES 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

Specifications

General Safety Summary vii...................................

Service Safety Summary ix....................................

Environmental Consid erations xi...............................

Preface xiii...................................................

Manual Structure xiii................................................

Manual Conventions xiv..............................................

Introduction xv..............................................

Performance Check Interval xv........................................

Strategy for Servicing xv.............................................

Tektronix Service Offerings xvi........................................

Product Overview 1-1.........................................

Specifications 1-3.............................................

Performance Conditions 1-3...........................................

Functional Specifica tions 1-3..........................................

Electrical Specifications 1-4...........................................

Mechanical (Physical) Characteristics 1-12................................

Environmental Chara cteristics 1-12......................................

Certifications and Compliances 1-13.....................................

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

Equipment Required 3-1..............................................

RTX130B Test Record 3-3............................................

Procedures 3-4......................................................

RTX130B QAM & VSB RF Signal Generator Service Manual

Table of Contents

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 Disc 4-47......................................

Recovery Procedure 4-47..............................................

Options

Diagrams

Replaceable Parts List

Options 5-1..................................................

Diagrams 6-1.................................................

Parts Ordering Information 7-1.........................................

Using the Replaceable Parts List 7-3....................................

RTX130B QAM & VSB RF Signal Generator Service Manual

List of Figures

Table of Contents

Figure 1-1: Timing diagram of the SPI interface 1-11................

Figure 2-1: Block diagram of the A180 QAM Modulator board 2-4...

Figure 3-1: Equipment connection for checking the internal clock

output level 3-5............................................

Figure 3-2: Equipment connection for checking the internal clock

frequency 3-6.............................................

Figure 3-3: Equipment connection for checking the play

operation--SPI interface 3-7.................................

Figure 3-4: Equipment connections for checking the external

clock/reference and trigger inputs 3-11.........................

Figure 3-5: Equipment connection for checking the output

signal--ASI interface 3-14....................................

Figure 3-6: Equipment connections for checking the ASI play

operation 3-16.............................................

Figure 3-7: Equipment connection for checking the ASI record

operation 3-17.............................................

Figure 3-8: Equipment connection for checking the recorded

file--ASI interface 3-19.......................................

Figure 3-9: E quipment connection for verifying the 8VSB play

operation 3-20.............................................

Figure 3-10: E quipment connection for verifying the 8VSB record

operation 3-22.............................................

Figure 3-11: Equipment connection for verifying the recorded

file--SMPTE310M interface 3-23..............................

Figure 3-12: Equipment connection for checking the output

for

errors 3-26................................................

Figure3-13:TestsGroupedbyPriority123screen(AnnexA) 3-28....

Figure 3-14: Equipment connection for checking the IEEE 1394b

interface 3-30..............................................

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: Gu ide to removal procedures 4-14......................

RTX130B QAM & VSB RF Signal Generator Service Manual

iii

Table of Contents

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 Back plane board removal 4-22.............

Figure 4-11: H ard 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....................

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.........................................

RTX130B QAM & VSB RF Signal Generator Service Manual

List of Tables

Table of Contents

Table 1-1: Functional specifications 1-3..........................

Table 1-2: Mainframe 1-4......................................

Table 1-3: Mechanical characteristics 1-12.........................

Table 1-4: Environmental characteristics 1-12......................

Table 1-5: Certifications and compliances 1-13.....................

Table 3-1: Equipment required for performance verification 3-1.....

Table 3-2: RTX130B test record 3-3.............................

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 modu le removal 4-9..................

RTX130B QAM & VSB RF Signal Generator Service Manual

Table of Contents

RTX130B QAM & VSB RF Signal Generator Service Manual

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.

To Avoid Fire or

Personal Injury

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.

RTX130B QAM & VSB RF Signal Generator Service Manual

vii

General Safety Summary

Symbols and Terms

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

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RTX130B QAM & VSB RF Signal Generator Service Manual

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.

RTX130B QAM & VSB RF Signal Generator Service Manual

Service Safety Summary

RTX130B QAM & VSB RF Signal Generator Service Manual

Environmental Considerations

This section provides information about the environmental impact of the product.

Product End-of-Life

Handling

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 t o 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.

The symbol shown to the left 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 t he 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.

Restriction of Haz ardous

Substances

RTX130B QAM & VSB RF Signal Generator Service Manual

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.

Environmental C onsiderations

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RTX130B QAM & VSB RF Signal Generator Service Manual

Preface

Manual Structure

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.

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.

H Specifications contains a description of the RTX130B and the characteristics

that apply to it.

H Theory of Operation contains circuit descriptions that support service to the

module level.

H Performance Verification contains procedures for confirming that an

RTX130B functions properly and meets warranted characteristics.

H Maintenance 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.

H Options contains descriptions of factory-installed options and field-upgrad-

able options.

H Diagrams contains the block diagram and interconnection diagram.

H Replaceable Parts List includes a table of all re placeable modules, their

descriptions, and their Tektronix part numbers.

RTX130B QAM & VSB RF Signal Generator Service Manual

xiii

Preface

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, t his manual uses the following conventions:

H Names 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.

H Instruction steps are numbered unless t here is only one step.

H Bold 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.

H Italic text refers to document names or sections. Italics are also used in

NOTES, CAUTIONS, and W A RNINGS.

Modules

Safety

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 m odule. 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:

H The RTX130B QAM & VSB RF Signal Generator User Manual (Tektronix

Example: The Diagrams section, beginning on page 6-1, includes a block diagram and an interconnect diagram.

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.

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RTX130B QAM & VSB RF Signal Generator Service Manual

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:

H The procedures in this manual should be performed only by a qualified

service person.

H Read 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 Verification, should be done every 12 months. In addition, a performance check is

recommended after module replacement.

Strategy for Servicing

If the RTX130B does not meet performance criteria, repair is necessary.

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.

RTX130B QAM & VSB RF Signal Generator Service Manual

Introduction

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 s ervice the RTX130B. They have access to the latest information on improvements to the RTX130B as well as the latest new options.

Warranty Repair Service

Self Service

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.

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RTX130B QAM & VSB RF Signal Generator Service Manual

Specifications

Product Overview

The RTX130B QAM & VSB RF Signal Generator generates QAM and 8VSB modulated signals that are compliant with the DVB-C/ITU-T J.83 Annex A/B/C and ATSC standards. In addition to the RF signal output feature, the RTX130B records and plays MPEG-2 transport streams that are compliant with ATSC, DVB, and ARIB standards.

The RTX130B provides the following features:

H 16/64/256QAM and 8VSB modulation formats

H Modulation frequency range: 50 MHz to 860 MHz

H 44 MHz or 36 MHz IF output

H Support the following standards:

H DVB-C/ITU-T J.83 Annex A (Option M1)

H ITU-TJ.83AnnexB(OptionM2)

H ITU-TJ.83AnnexC(OptionM3)

H ATSC (Option M4)

H Data rate: 200 Mbps maximum (RAM mode); 256 Kbps minimum

H Hierarchy display of stored or captured transport streams

H 188, 204, 208 bytes packet size, S-TMCC, M-TMCC, non transport stream,

and partial transport stream output formats

H Real-time updating of stream parameters; continuity_counter, PCR/PTS/

DTS, TOT/TDT/STT, NPT, and Reed Solomon (ISDB-T only)

H Continuous recording of captured streams

H PCR jitter insertion

H Triggered stream capture

H Full remote control using Ethernet interface

H Scheduler application for automated stream playout and record (Option SC

only)

The RTX130B includes the R eMux application software that provides the capability to create a transport stream of super frame structure defined in the ISDB-S systems from an MPEG2 transport stream.

RTX130B QAM & VSB RF Signal Generator Service Manual

1-1

Product Overview

1-2

RTX130B QAM & VSB RF Signal Generator Service Manual

Specifications

Tables 1-1 through 1-4 list the functional, electrical, mechanical, and environmental characteristics of the RTX130B. Table 1-5 lists the national and international standards to which the RTX130B complies.

All listed specifications are guaranteed unless labeled “typical”. Typical specifications are provided for your convenience but are not guaranteed.

Performance Conditions

The electrical characteristics listed on the following pages are valid under the following conditions:

H The RTX130B must be in an environment where the temperature, altitude,

H The RTX130B must have a warm-up period of at least 20 minutes.

H The RTX130B must be operating at an ambient temperature between

humidity, and vibration conditions are within the operating limits described in Table 1-4 on page 1-12.

+5 _Cto+40_C, unless otherwise noted.

Functional Specifications

Table 1-1: Functional specifications

Characteristics Description

System configuration

System OS Windows XP Professional

CPU 1.3 GHz

System memory 1GB

Display 6.3 inch, XGA (1024 x 768), Windows Control Panel setting is SVGA (800 x 600)

Hard disk drive 160 GB

Expansion slot 1-PCIslot

RTX130B QAM & VSB RF Signal Generator Service Manual

1-3

Specifications

Electrical Specifications

Table 1-2: Mainframe

Characteristics Description

Maximum output rate

Hard disk

RAM

Maximum record rate

Hard disk

RAM

Internal reference clock For Output_clock, PCR/PTS/DTS, packet operation timing, and TDT/STT time.

Reference clock (on shipping) 27 MHz ± 1 ppm

Reference clock stability, typical ± 1 ppm/year

External reference/clock input

Connector type BNC

Input impedance, typical 50 Ω

Reference input

Frequency 8.129698 MHz, 10 MHz, and 27 MHz

Input level, typical Sine wave: 0 ± 6dBm

Clock input

Frequency 160 kHz to 25 MHz (parallel clock)

Input level, typical 0.5 V to 3.0 V

External trigger input/MISC output

Connector type BNC

Input impedance, typical 1kΩ

Threshold level Rising and falling edges are programmable.

High level

Low level

Output level

High level

Low level

Output impedance 50 Ω

≥120 Mbps

≥200 Mbps

≥120 Mbps (File size: < 4 GB, just after disk format operation) ≥90 Mbps (File size: 33 GB, just after disk format operation)

≥200 Mbps

± 1 ppm (5 _Cto40_C)

Square wave: 0.5 Vp-p to 3.0 Vp-p

1.28 MHz to 32 MHz (serial clock)

>3.5 V (maximum input voltage: 7 V)

<0.8 V

>2.2V(with50Ω termination)

<0.8V(with50Ω termination)

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RTX130B QAM & VSB RF Signal Generator Service Manual

Table 1-2: Mainframe (Cont.)

Characteristics Description

PLL

Frequency 50 MHz to 100 MHz, locked to reference clock

Output clock 50 MHz maximum (serial clock)

26.75 MHz maximum (parallel clock)

Output rate 214 Mbps maximum

64 Kbps minimum

TS clock

TS clock = (X / (2 * Y * Z) ) * 27 MHz

Specifications

(Internal and external reference, 27 MHz and 10 MHz)

(External parallel clock) TS clock = (X / (2 * Y * Z) ) * external parallel clock, 214 MHz maximum

(External serial clock) TS clock = (X / (2 * Y * Z) ) * external serial clock / 8,32 MHz maximum

P/N and Jitter (serial clock)

SPI interface

Connector type D-sub, 25 pin

Data rate 256 Kbps to 214 Mbps

Pin assignments 1 DCLK

15362 < X < 31248 1686 < Y < 3376 2 ≤ Z ≤ 65536

15632 < X < 31248 1 < Y < 16383 2 ≤ Z ≤ 65536

< --104 dBc/Hz at 21.455707 MHz +20 kHz (RBW=300 Hz)

2GND 3to10 DATA7toDATA0 11 DVALID 12 PSYNC 13 Shield 14 DCLK 15 GND 16 to 23 DATA 7 24 DVALID 25 PSYNC

to DATA 0

RTX130B QAM & VSB RF Signal Generator Service Manual

1-5

Specifications

Table 1-2: Mainframe (Cont.)

Characteristics Description

Output

Output level, typical 330 mV to 550 mV (termination: internal 100 Ω, external 100 Ω), bus LVDS with 50 Ω

termination

Offset 1.1 V to 1.5 V

Output resistance, typical 100 Ω, between differential outputs (output off)

Data delay , typical ± 5 ns from the falling edge of DCLK (see Figure 1-1 on page 1-11)

Input

Input level, typical

Input resistance, typical 100 Ω (between differential inputs)

Clock pulse width, typical T/2 ± T/10, T=1/f (f=byte clock frequency) (see Figure 1-1 on page 1-11)

Data hold time, typical T/2 ± T/10, T=1/f (f=byte clock frequency, data are latched on DCLK rising edge)

ASI/SMPTE310M interface

Connector type BNC

Impedance 75 Ω

Data rate 256 Kbps to 214 Mbps (ASI), 19.3 Mbps (SMPTE310M)

Output

Output voltage 800 mV ± 10%

Jitter (ASI)

Jitter (SMPTE310M)

Rise/fall time

Return loss

Input

Input voltage, typical 200 mV to 880 mV

Return loss

Data format Accepts both byte and packet modes.

> +100 mV, < --100 mV, (RI+)--(RI--) with 100 Ω termination

(see Figure 1-1 on page 1-11)

≤ 0.2 UI p--p

Past 1stedge < 1.4 ns

Past 2 Prev 1

edge < 2ns

edge < 1.4 ns

ASI: ≤ 1.2 ns (20% to 80%) SMPTE310M: 0.4 ns ≤ X ≤ 5 ns (20% to 80%)

ASI: < --17 dB (5 MHz to 270 MHz) into 75 Ω load SMPTE310M: < --30 dB (5 MHz to 38.7 MHz) into 75 Ω load

ASI: < --17 dB (5 MHz to 270 MHz) into 75 Ω load SMPTE310M: < --17 dB (5 MHz to 38.785316 MHz) into 75 Ω load

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RTX130B QAM & VSB RF Signal Generator Service Manual

Table 1-2: Mainframe (Cont.)

Characteristics Description

RF/IF output

Connector type BNC

Output impedance, typical 75 Ω

Digital modulation standard

DVB-T/ITU-T J8.3 Annex A (Option M1) The following parameters conform to the standard:

Symbol rate: 1 Msps to 6.9565 Msps (IF output)

Modulation: 16/64/256QAM Outer cording: RS (204, 188) Roll off: 0.15

ITU-T J.83 Annex B (Option M2) The following parameters conform to the standard:

Symbol rate: 5.056941/5.360537 Msps Modulation: 64/256QAM Outer cording: RS (128, 122) Roll off: 0.18/0.12 Interleaving: Level 1 (64 QAM only)

Specifications

5 Msps to 6.9565 Msps (RF output)

I=128, J=1

Level 2

I=128, J=1 (Control Word: 0001) I=64, J=2 (0011) I=32, J=4 (0101) I=16, J=8 (0111) I=8, J=16 (1001) I=128, J=1 (0000) I=128, J=2 (0010) I=128, J=3 (0100) I=128, J=4 (0110) I=128, J=5 (1000) I=128, J=6 (1010) I=128, J=7 (1100) I=128, J=8 (1110)

ITU-T J.83 Annex C (Option M3) The following parameters conform to the standard:

Symbol rate: 1 Msps to 5.3097 Msps (IF output)

5 Msps to 5.3097 Msps (RF output) Modulation: 64QAM Outer cording: RS (204, 188) Roll off: 0.13

ITU-T J.83 Annex C-JCTEA The following parameters conform to the standard:

Symbol rate: 5.274 Msps Modulation: 64QAM Outer cording: RS (204, 188) Roll off: 0.13

RTX130B QAM & VSB RF Signal Generator Service Manual

1-7

Specifications

Table 1-2: Mainframe (Cont.)

Characteristics Description

ATSC (Option M4) The following parameters conform to the standard:

Symbol rate: 10.762238 Msps Modulation: 8VSB Outer cording: RS (187, 207) Roll off: 0.1152

RF output

Frequency 50 MHz to 860 MHz (setting resolution: 12.5 kHz steps)

Output amplitude, typical 45 dBmV to 58 dBmV (setting resolution: 1 dB steps)

EVM (ITU-T J.83 Annex A) 256QAM

< 2.5% (RMS), 50 MHz to 750 MHz @ 45 dBmV to 52 dBmV < 3.1% (RMS), 50 MHz to 860 MHz @ > 52 dBmV

64QAM

< 2.7% (RMS), 50 MHz to 750 MHz @ 45 dBmV to 52 dBmV < 3.3% (RMS), 50 MHz to 860 MHz @ > 52 dBmV

16QAM

< 3.0% (RMS), 50 MHz to 750 MHz @ 45 dBmV to 52 dBmV < 3.8% (RMS), 50 MHz to 860 MHz @ > 52 dBmV

EVM (ITU-T J.83 Annex B) 256QAM

< 2.5% (RMS), 50 MHz to 750 MHz @ 45 dBmV to 52 dBmV < 3.1% (RMS), 50 MHz to 860 MHz @ > 52 dBmV

64QAM

< 2.7% (RMS), 50 MHz to 750 MHz @ 45 dBmV to 52 dBmV < 3.3% (RMS), 50 MHz to 860 MHz @ > 52 dBmV

EVM (ITU-T J.83 Annex C and Annex C for JCTEA)

SN (8VSB)

Return loss

IF output

Frequency 36 MHz, 44 MHz

Output amplitude 35 dBmV

EVM (ITU-T J.83 Annex A)

EVM (ITU-T J.83 Annex B)

64QAM

< 2.7% (RMS), 50 MHz to 750 MHz @ 45 dBmV to 52 dBmV < 3.3% (RMS), 50 MHz to 860 MHz @ > 52 dBmV

> 27.0 dB, 190 MHz to 860 MHz @ 45 dBmV to 52 dB mV > 25.0 dB, 190 MHz to 860 MHz @ > 52 dB mV > 25.0 dB, < 190 MHz @ 45 dB mV to 58 dBmV

<--12 dB @ 50 MHz to 860 MHz

256QAM: <0.8% (RMS), 64QAM: <0.9% (RMS), 16QAM: <0.9% (RMS) (symbol rate: ≥1 Msps, IF frequency: 36 MHz)

256QAM: <0.8% (RMS), 64QAM: <0.9% (RMS) (IF frequency: 36 MHz)

1-8

RTX130B QAM & VSB RF Signal Generator Service Manual

+ 126 hidden pages

Tektronix RTX130B Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

List of Figures

List of Tables

General Safety Summary

Service Safety Summary

Environmental Considerations

Preface

Manual Structure

Manual Conventions

Finding Other Information

Introduction

Performance Check Interval

Strategy for Servicing

Tektronix Service Offerings

Product Overview

Specifications

Performance Conditions

Functional Specifications

Electrical Specifications