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Tektronix HDVG1 Service Manual

Hdtv digital video generator
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Service Manual
HDVG1
HDTV Digital Video Generator
071-0594-51
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

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Summary of Contents for Tektronix HDVG1

  • Page 1 Service Manual HDVG1 HDTV Digital Video Generator 071-0594-51 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.
  • Page 2 Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and are protected by United States 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.
  • Page 3 Tektronix, with shipping charges prepaid. 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.

  • Page 5: Table Of Contents

    ....... . . 4- - 5 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 6 ........8- - 2 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 7 ........2- -6 Figure 2- -7: Menu structure for the HDVG1 Generator module . . .
  • Page 8 Table 4- -1: Equipment required for Performance Verification ..4- -1 Table 4- -2: HDVG1 Calibration Data Report ....4- -2 Table 5- -1: Required tools .

  • Page 9: General Safety Summary

    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. HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 10 CAUTION indicates a hazard to property including the product. Symbols on the Product. The following symbols may appear on the product: Double CAUTION WARNING Protective Ground Insulated (Earth) Terminal Refer to Manual High Voltage HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 11 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. HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 12 Service Safety Summary viii HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 13: Environmental Considerations

    RoHS Directive requirements expect for the presence of hexavalent chromium in the surface coating of the aluminum chassis parts, assembly hardware, and 63/37 tin/lead solder used in the fabrication of the circuit boards. HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 14 Environmental Considerations HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 15: Module

    Preface You have purchased this optional service manual for the HDVG1 HDTV Digital Video Generator module. To optimize troubleshooting capability, you should also purchase the service manual for the TG2000 Platform mainframe. About This Manual This manual contains information for servicing the HDVG1 HDTV Digital Video Generator module to a module level.

  • Page 16: Related Manuals

    Preface Related Manuals The following documents are related to the HDVG1 Generator module. H The TG2000 Signal Generation Platform Service Manual describes how to service the mainframe to the module level, and includes a troubleshooting disk that is required for all module and mainframe troubleshooting. This optional manual must be ordered separately, and is recommended before beginning any troubleshooting.
  • Page 17 Specifications...

  • Page 19: Product Description 1

    Specifications This section contains a general product description of the HDVG1 Generator module followed by the operating specifications of the module. Product Description The HDVG1 Generator module is an HDTV test signal generator which provides 1.485 Gb/s serial digital video signals in various formats. The module...

  • Page 20: Table 1- 1: Electrical Specifications (Typical)

    Specifications Characteristics This section contains the specifications for the HDVG1 Generator module. Specifications are only valid when the module is installed in a TG2000 Platform mainframe. For installation instructions, refer to Module Installation on page 2- -2. For a list of environmental specifications, refer to the TG2000 Signal Generation Platform Service Manual.

  • Page 21: Table 1- 2: Certifications And Compliances

    Specifications Certification and Compliances The certification and compliances for the HDVG1 Generator module are listed in Table 1- -2 . Table 1- 2: Certifications and compliances Category Standards or description EC Declaration of Conformity - - Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was...
  • Page 22 Specifications 1- 4 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 23 Operating Information...

  • Page 25: Installation 2

    Installation This section contains instructions for installing the HDVG1 Generator module into the TG2000 Platform mainframe and instructions for operating the module. Listed below are the major topics in this section. H Preventing component damage H Module installation, including signal sets and output configuration...

  • Page 26: Figure 2- 1: Tg2000 Platform Mainframe Rear Panel, Showing Slot Numbering

    Slots 2 through 10 Power GPIB DVG1 HDVG1 Clock AGL1 Supply Module Module Module Module Module AVG1 AWVG 1 Module Module Module Module Figure 2- 1: TG2000 Platform mainframe rear panel, showing slot numbering 2- 2 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 27: Figure 2- 2: Top Cover Removal

    4. Refer to Figure 2- -2 and remove or loosen all screws to remove the top cover. Top cover Loosen screws (12) Top cover Remove screws (23) Figure 2- 2: Top cover removal 2- 3 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 28: Figure 2- 3: Removing The Rear Panel

    6. While ensuring correct alignment of the module flange as shown in Figure 2- -4, lower the module into the desired slot as shown in Figure 2- -5. Flange Figure 2- 4: Module flange 2- 4 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 29: Figure 2- 5: Installing The Module

    8. Press down evenly on the module until it is firmly in place. 9. Refer to Figure 2- -6 and insert and tighten the top screw, which comes with your module, and tighten the rear panel screw. 2- 5 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 30: Figure 2- 6: Top Screw

    Installing Signals to the Default Destination or Installing Signals to a Non-default Destination. To replace signal sets, refer to the TG2000 Signal Generation Platform User Manual. 2- 6 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 31 NOTE. The Add Signals window shows the amount of Kbytes selected (Total Tagged) and the amount available on the module. If the tagged total is greater than the amount available, the signal sets will not load. 9. Touch Select Destination. 2- 7 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 32: Signal And Logo Backup And Module Removal 2

    1. Insert a DOS formatted disk into the platform’s disk drive. 2. Push the Disk button and touch Save Signals to Disk. 3. Touch Select Source and select the HDVG1. Use the cursor arrows to select the HDVG1 module in the signals column.
  • Page 33 TG2000 Platform mainframe accessories kit. 9. Tighten the screws on the blank rear panel. 10. Reinstall the top cover and insert and tighten all top cover screws. 2- 9 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 34 Installation 2- 10 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 35: Figure 2- 7: Menu Structure For The Hdvg1 Generator Module

    Functional Overview This section provides an overview of the HDVG1 Generator module. If you are not familiar with the operation of the TG2000 Signal Generation Platform, refer to the TG2000 Signal Generation Platform User Manual before reading this section. Figure 2- -7 shows the menu structure for basic module operations.
  • Page 36 Functional Overview Outputs The HDVG1 Generator module has four outputs: three serial outputs and one trigger output. Serial Outputs. Outputs 1, 2 and 3 are serial signal outputs (BNC). Trigger Output. The trigger output (BNC) can be used to trigger an oscilloscope or other video equipment.

  • Page 37: Operating Procedures 2

    H Power on the mainframe and select the module H Select the output signal H Active signal parameters H Module parameters Refer to Figure 2- -7 on page 2- -11 for the menu structure. 2- 13 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 38: Power On And Select The Module 2

    Troubleshooting Procedures, starting on page 5- -9. NOTE. The illustrations in these procedures show the factory default name (HDVG1:X where X represents the slot number in which the module is installed). However, because you can rename the module, your icons may display a different name.

  • Page 39: Select The Output Signal 2

    The output signal is supplied on the three rear-panel serial outputs. Use the following procedure to select the module’s output test signal. You can select any of the HDVG1 signals that are loaded in your instrument. 1. Push the Signal Sets button to open the window shown below. Check that there is an icon for each installed signal set.
  • Page 40 6. To select the output signal using the List window, display the list of test signals by pushing the front-panel List button. Use the Navigation arrow keys to highlight the module and signal, and then push the Select button. 2- 16 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 41: Active Signal Parameters 2

    Signal Parameters window, shown below. Changes that you make to parameters in any of these windows affect only the active signal. To enter the Active Signal Parameters window for the HDVG1 Generator module, follow these steps: 1. Select the module, if not already selected.
  • Page 42 There are no factory defaults. Factory signals may be reinstalled, if needed. NOTE. To modify and save a Tektronix generated signal, you must rename it. When you rename and save a signal, both the original and the modified signals are saved.
  • Page 43 Access this window by touching Text Overlay in the Active Signal Parameters window, shown on page 2- -17. Detailed information about adding and position- ing overlaid text can be found in the HDVG1 HDTV Digital Video Generator User Manual. 2- 19...
  • Page 44 Operating Procedures Signal Information You can view detailed information about the selected signal in the Signal Information window, accessed through the Active Signal Parameters window shown on page 2- -17. 2- 20 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 45: Module Parameters 2

    Parameters window, shown below. Changes that you make to parameters in any of these windows affect the entire module. To enter the Module Parameters window for the HDVG1 Generator module, follow these steps: 1. Select the HDVG1 Generator module, if not already selected.
  • Page 46 You can set the horizontal and vertical timing of this module with respect to the BG1 Generator module. Changes you make to timing affect all signals for the HDVG1 Generator module. In the Module Parameters window, shown on page 2- -21, touch the module timing icon.
  • Page 47 Touch On/Off to turn on the circle overlay. If you want to reset the values, touch Reset All. This will set the diameter, horizontal, and vertical to 90%, 0, and 0 respectively. 2- 23 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 48 Touch Reset All if you want to set all the parameters to the default settings (H Pos to zero and V Pos to 1). NOTE. Triggers are active throughout the line. However, cursors are only active during active video. 2- 24 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 49: Embedded Audio 3

    You can also adjust the frequency and amplitude of the embedded audio signal. Changes you make affect all signals for this module. Detailed information can be found in the HDVG1 HDTV Digital Video Generator User Manual.
  • Page 50 You can also save logos to a floppy disk, add logos to the module, and delete logos from the module using the File Utilities window. If you want to reset the values, touch Reset. This will set the horizontal and vertical position to 0. 2- 26 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 51 Theory of Operation...

  • Page 53: Theory Of Operation

    TG2000 Platform mainframe, refer to the TG2000 Signal Generation Platform Service Manual. The HDVG1 Generator module is a 10-bit precision, digital video test signal generator for HDTV digital signals. Output signal data is stored in fast access memory (Line Memory) which has been loaded from the NVRAM over the CPU bus.

  • Page 54: Figure 3- -1: Simplified Block Diagram Of The Hdvg1 Generator

    Figure 3- 1: Simplified block diagram of the HDVG1 Generator module Signal Memory The HDVG1 module uses two levels of memory to generate signals in real time (See Figure 3- -2). Each level of memory puts constraints on the maximum complexity of a signal that can be generated.

  • Page 55: Figure 3- 2: Signal Memory Layout

    ..[1 / (60*750)] × 174762 = 3.8 seconds [233 Frames] NOTE. The limit on number of unique video lines means that HDVG1 Generator module cannot generate an arbitrarily complex full frame image (i.e., it cannot replicate a captured video image).

  • Page 56: Table 3- 1: Supported Embedded Audio Frequencies

    Theory of Operation Embedded Audio The HDVG1 can generate video signals with embedded digital audio. The embedded signal is 24 (or 20) bit audio data with a sample rate of 48 kHz. The data can be made up of multiple frequencies and amplitudes, with channel and status independence.
  • Page 57 Performance Verification...

  • Page 59: Table 4- 1: Equipment Required For Performance Verification

    Performance Verification Perform the following procedure to verify that your HDVG1 Generator module is meeting the requirements listed in the Specifications section. NOTE. All values checked in this procedure represent typical characteristics and are not absolutely guaranteed. Required Equipment Test Equipment Table 4- -1 lists the equipment required for this procedure.

  • Page 60: Table 4- 2: Hdvg1 Calibration Data Report

    Performance Verification Calibration Data Report Photocopy this form and use it to record the performance test results. Table 4- 2: HDVG1 Calibration Data Report Serial Number: Cal Date: Temperature: Humidity: Step Function Tested Minimum Cal Data Maximum Serial Output Rise Time (20% to 80% amplitude points)

  • Page 61: Preparation For Performance Verification 4

    5. Use the Navigation arrows to move the cursor to the new preset. Press the Select key. 6. Touch Save To. Your current instrument settings are saved to the new preset. 4- 3 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 62: Performance Verification Procedures 4

    If you do not wish to perform the backup, you can choose to restore the standard HDVG1 test signals instead, using the HDVG1 Test Signals disks that were shipped with the module’s user manual. To perform Instrument Backup, follow these steps: 1.

  • Page 63: Preparation 5

    Connections. Refer to Figure 4- -1 for connections. Use the 75 Ω coaxial cables to make the following connections: H Connect OUTPUT 1 connector on the HDVG1 Generator module to the CHA connector on the digital TV waveform monitor rear panel.

  • Page 64: Figure 4- -1: Sdi Correctness And Digital Audio Output Check

    1. Select the 75% SMPTE Color Bars signal as follows: a. Push the Signal Sets button on the TG2000 Signal Generation Platform. b. Touch 1920X1080 60 2:1 on the display. Load from floppy if necessary. 4- 6 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 65 Select the Input item from the menu, and select CH1- -2 input: BNC- -unbalanced item from the submenu. c. On the digital audio monitor front panel, press the CLEAR button to clear the menu. 4- 7 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 66 H Connect the OUTPUT 1 connector on the HDVG1 Generator module to the AMT75 and then to the CH1 input connector on the oscilloscope sampling head.

  • Page 67: Figure 4- 2: Eye Pattern Check Connection

    Push the Signal Sets button on the TG2000 Signal Generation Platform. b. Touch 1920X1080 60 2:1 on the display. c. Touch Color Bars on the display until the 75% SMPTE Color Bars signal is selected. 4- 9 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 68 Rise and fall time : < 270 ps (20% to 80%) Alignment jitter : < 135 ps 4. Change the cable connection on the HDVG1 Generator Module. a. Disconnect the coaxial cable from OUTPUT 1 connector on the HDVG1 Generator module. 4- 10...

  • Page 69: Figure 4- 4: Trigger Output Check Connection

    Ω Ω tions: H Connect the TRIG OUT connector on the HDVG1 Generator Module to the oscilloscope CH1 input connector. HDVG1 module TDS740D Oscilloscope TG2000 Si g nal Generati o n Pl a t- form rear panel 75 Ω...
  • Page 70 Verification procedure, restore the signals by following these steps: 1. Insert the Troubleshooting disk supplied with this manual into the mainframe disk drive and press the front-panel Sequences key. 2. Select the tgrstore.seq file, and then touch Start Load. 4- 12 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 71 Performance Verification procedure. Press the Select key. 4. Touch Recall. Your instrument settings are recalled. This completes the Performance Verification procedure. If you require further assistance, contact your nearest Tektronix Service Center. 4- 13 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 72 Performance Verification 4- 14 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 73 Maintenance...

  • Page 75: Repackaging Instructions 5

    Maintenance This section contains instructions and procedures for maintaining the HDVG1 Generator module. For information on servicing the mainframe, refer to the TG2000 Signal Generation Platform Service Manual. The following information can be found in this section: H Preparation page 5- -1...
  • Page 76 The rosin residue, if left alone, does not exhibit these corrosive properties. 5- 2 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 77: Inspection And Cleaning

    Use a shipping carton that has a test strength of at least 250 pounds (113.5 kg). b. Surround the module with a protective (anti-static) bag. 5- 3 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 78: Figure 5- 1: Placing The Module In The Protective Wrapping

    There should be three inches of tightly packed cushion- ing on all sides of the instrument. 3. Seal the carton with shipping tape, industrial stapler, or both. Module 004-4712-00 Figure 5- 1: Placing the module in the protective wrapping 5- 4 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 79: Figure 5- 2: Placing The Module In The Shipping Carton

    Maintenance 004-4713-00 2 Each 004-4712-00 004-0828-00 Figure 5- 2: Placing the module in the shipping carton 5- 5 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 80 Maintenance 5- 6 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 81: Table 5- 1: Required Tools

    To remove the rear panel from a module, perform the following steps: 1. Perform Signal Backup and Logo Backup on page 2- -8. 2. Use the Module Removal procedure on page 2- -9 to remove the HDVG1 Generator module from the mainframe.

  • Page 82: Replacing The Shield 5

    Removal and Replacement Replacing the Shield It is usually not necessary to remove the shield. If you are returning the HDVG1 Generator module to Tektronix for service, do not remove the shield. Return the entire module. If you need to replace a damaged shield, carefully follow these instructions.

  • Page 83: Table 5- 2: Equipment Required For Troubleshooting

    Troubleshooting Procedures This section contains instructions and procedures for troubleshooting the HDVG1 Generator module. These procedures will help you decide whether it is necessary to replace your module. If the TG2000 Platform mainframe does not boot up or if the display is not working, refer to Troubleshooting in the TG2000 Signal Generation Platform Service Manual.

  • Page 84: General Troubleshooting 5

    File to Disk during instrument power up. Any error messages are written to an internal file called the console ring file. Tektronix technicians can use the information in the console ring file to help troubleshoot a malfunctioning module. NOTE. Write the console ring file to disk before performing troubleshooting to prevent the troubleshooting routines from overwriting the console ring file.

  • Page 85: Table 5- 3: Fault Symptom Table

    Troubleshooting Procedures 9. Read the console ring file power up messages. If there are HDVG1 Generator module errors, refer to the Fault Symptom Table on page 5- -11. 10. If the TG2000 Platform does not display any power-up confidence test messages, or the CPU module fails the confidence test, refer to Trouble- shooting in the TG2000 Signal Generation Platform Service Manual.

  • Page 86: Figure 5- 3: Flowchart For Major Difficulties With Module

    Troubleshooting Procedures Troubleshooting Flowcharts The troubleshooting flowcharts provide a series of steps to help you determine whether the HDVG1 Generator module is faulty. Each chart relates to an entry in Table 5- -3. Use this procedure when the mainframe does not recognize the module or does not pass power-up confidence tests.

  • Page 87: Figure 5- -4: Flowchart For Checking The Current Module Installation

    Set the rear-panel power switch to on, and then use the front-panel switch to turn the instrument on. Watch the display for the HDVG1 Confidence Tests. Note whether the HDVG1 module passed the diagnostic. Note the highest number to appear.

  • Page 88: Figure 5- 5: Flowchart For Checking The Module In A Different Slot

    Set the rear-panel power switch to on, and then use the front-panel switch to turn the instrument on. Watch the display for the HDVG1 Confidence Tests. Note whether the HDVG1 module passed the diagnostic. Note the highest number to appear.

  • Page 89: Figure 5- -6: Flowchart For Failure To Power

    Set the rear-panel power switch to off, then on, and then use the front-panel switch to turn the instrument on. Watch the display for the HDVG1 Confidence Tests. Note whether the HDVG1 module passed the diagnostic. Note the highest number to appear.

  • Page 90: Figure 5- 7: Flowchart For Signals Lost After Power Down

    Replace the module. the new slot? There may be a problem with the Backplane board. Record troubleshooting information and contact Tektronix. Figure 5- 7: Flowchart for signals lost after power down 5- 16 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 91: Figure 5- 8: Measuring The Battery Charging Circuit

    Is the signal still HDVG1 Module OK wrong? Reload test signal from disk. Replace affected module. Figure 5- 9: Flowchart for wrong signal on output 5- 17 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 92: Figure 5- 10: Flowchart For Missing Output Signal

    Refer to Signal Set Installation on page 2- - 6. Is the signal still HDVG1 Module OK missing? Replace affected module. Figure 5- 10: Flowchart for missing output signal 5- 18 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 93 Option...
  • Page 95 The following option is available. H Option D1 ships with test result report. Option D1 Description A calibration data test result report will be provided with the HDVG1 Generator module when this option is specified. 6- 1 HDVG1 HDTV Digital Video Generator Service Manual...
  • Page 96 Option 6- 2 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 97: Diagram 7

    Diagram...

  • Page 99: Figure 7- 1: Hdvg1 Generator Module Connections

    Diagrams showing mainframe component interconnections, such as power supply and clock, can be found in the TG2000 Signal Generation Platform Service Manual. A block diagram of the HDVG1 Generator module is located in the Theory of Operation section, beginning on page 3- -1. OUTPUT 1...
  • Page 100 Diagram 7- 2 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 101: Replaceable Parts List 8

    Replaceable Parts List...

  • Page 103: Parts Ordering Information 8

    Replaceable Parts List This section contains a list of the replaceable modules for the HDVG1 Generator module. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative.

  • Page 104: Using The Replaceable Parts List 8

    Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow. Tektronix part number Use this part number when ordering replacement parts from Tektronix. 3 and 4 Serial number Column three indicates the serial number at which the part was first effective. Column four indicates the serial number at which the part was discontinued.
  • Page 105 671- - 2879- - XX EXTENDER BOARD - - - - - - - - - - - - - - - - - - - - - - TEST DATA REPORT 8- 3 HDVG1 HDTV Digital Video Generator Service Manual...

  • Page 106: Figure 8- 1: Exploded View

    Replaceable Parts List Figure 8- 1: Exploded view 8- 4 HDVG1 HDTV Digital Video Generator Service Manual...

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