Tektronix VM700A User Manual
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Tektronix VM700A User Manual

Video measurement set option 01 (ntsc) & option 11 (pal)
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Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
User Manual
VM700A Video Measurement Set
Option 01 (NTSC) & Option 11 (PAL)
070-8166-05

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  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) User Manual VM700A Video Measurement Set Option 01 (NTSC) & Option 11 (PAL) 070-8166-05...
  • Page 2 User Manual VM700A Video Measurement Set Option 01 (NTSC) & Option 11 (PAL) 070-8166-05 This document supports firmware version 2.09.01.
  • Page 3 Copyright 1992, 1993 Tektronix, Inc., Beaverton, Oregon. Printed in the United States of America. All Rights Reserved. Contents of this publication may not be reproduced in any form without the written permission of Tektronix, Inc. Specification and price change privileges are reserved.
  • Page 4 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. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
  • Page 5 For product support outside of North America, contact your local Tektronix distributor or sales office. Service Contact your local Tektronix distributor or sales office. Or visit Support our web site for a listing of worldwide service locations. http://www.tektronix.com For other...
  • Page 6 Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Leav Previous Video Audio Diags Selection e D irectory Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï The VM700A Video Measurement Set...
  • Page 8 EC Declaration of Conformity Tektronix Holland N.V. Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the VM700A meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official...

  • Page 10: Table Of Contents

    ..........3-13 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 11 ..............VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 12 ............9-15 Index VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 13: List Of Figures

    ....... . 9-12 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 14: List Of Tables

    ..........9-14 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 15 Contents VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 16: Safety Summary

    This product is intended to operate from a power source that applies no more than 250 V between the supply conductors or between either supply conductor and ground. A protective ground connection, through the grounding conductor in the power cord, is essential for safe system operation. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 17 To avoid explosion, do not operate this product in an explosive atmosphere. Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present. viii VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 18: Section 1:Introduction And Specification

    Section 1:Introduction and Specification...

  • Page 20: Manual Overview

    Input signals can be broadcast or generated by test equipment. The VM700A can be operated by using its front-panel controls or by using one of the rear-panel RS-232C ports, or the GPIB port if Option 48 is installed, to send it commands.
  • Page 21 Operator Manual. Consult either of those manuals for more information about individual measurements. The VM700A features a large set of diagnostics, to allow you to verify that the instrument is operating properly, as well as to localize malfunctions if they occur. Diagnostics are described in...

  • Page 22: Instrument Specifications

    To 15,240 meters (50,000 feet). Meets FCC CFR Part 15, Sub-part B, Class A Table 1-4: Remote Relay Characteristics Description Remote Contact Closure Relay Contacts are not debounced. Maximum Current 50 mA VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 23: Table 1-5: Optional Power Cords

    IEC—International Electrotechnical Commission NEMA—National Electrical Manufacturer’s Association SEV—Schwetzervischer Elektrotechischer Versin UL—Underwriters Laboratories Inc. A 6 A, type C fuse is also installed inside the plug of the Option A2 power cord. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 24: Section 2:Installation And Operation

    Section 2:Installation and Operation...

  • Page 26: Power Requirements

    Section 2:Installation and Operation Power Requirements The VM700A operates with line frequencies from 48 Hz to 66 Hz, over two line voltage ranges. The nominal setting of the low voltage range is 115 VAC. The nominal setting of the high voltage range is 230 VAC.

  • Page 27: Calibrating The Touch Screen

    Tektronix field office for additional power-cord information. Calibrating the Touch The VM700A is shipped from the factory with its touch screen fully calibrated. Screen Although it will seldom be necessary, the touch screen can easily be recalibrated.

  • Page 28: Front Panel Operation

    Figure 2-2: VM700A front panel Touch Screen The display (CRT) area of the VM700A is also a touch screen for user input. The screen displays input waveform signals, the digital vectorscope, a low-quality television picture of the input signal, graphic measurement displays, and automatic measurement results.

  • Page 29: Freeze. Source Selection, And Average Functions

    For some modes, an input source can be inverted. This feature may be used to invert a positive-sync video signal to obtain the correct polarity for measurement by the VM700A. To invert a single source, press and hold the source button approximately one second, until the instrument beeps. When a source is inverted, the LED on the source button blinks.

  • Page 30: Control Knob

    Help button a second time. Configure and Function. The Configure button and its usage are discussed in Section 3, Configuring the VM700A. The Function button and its usage are discussed in the VM700A Programmer’s Reference Manual. Copy. The Copy button sends a copy of the display to the print spooler (tempo- rary memory space) to queue for printing.

  • Page 31: Equipment/Signal Sources Required

    Without the correct signal being applied, the displays contain no useful information. Bandwidth The bandwidth of the VM700A is 0 Hz (DC) to approximately 6.8 MHz. Connecting Inputs and The VM700A has three video loop-through inputs, one external sync loop- Outputs through, and two RS-232C DTE ports on its rear panel (Figure 2-3).

  • Page 32: Figure 2-3: Vm700A Rear Panel

    Pin 4 - RTS (Request To Send [data to the VM700A]). With Flow Control (CTS/RTS selected), normally RTS connects to the CTS line of a terminal, and the line is active when the VM700A is ready to receive data. When the receive buffers of the VM700A are nearing...

  • Page 33: Table 2-1: Typical Rs-232C Cable Wiring

    Note also that both ends of the DTE to DTE cable are typically female DB-25 connectors. The DTE to DCE cable is female on the VM700A (DTE) end, and typically male on the modem (DCE) end. See the VM700A Programmer’s Reference Manual for more information on connecting the VM700A for remote operation and cable wiring diagrams.

  • Page 34: Connecting Printers

    Communication Setup file, all you need to do now is turn on the VM700A and the printer. If you have changed some factory default values, be sure the file contains the values shown in the following example.

  • Page 35: Connecting An Apple Laser Writer

    Laser Writer serial port. Setting up the VM700A. In Configure mode, set the Copy Format, Report Format, and Log Format in the Communication Setup file to PostScript. Set the Copy Port and Report Port to Serial Port 0 or Serial Port 1, as appropriate.

  • Page 36: Connecting An Ascii Printer

    The pin 20 to pin 5 connection is required only for hardware flow control. It may be omitted for XON/XOFF flow control. Connecting an ASCII The VM700A can also be configured to operate with a generic ASCII printer. In Printer the Communication Setup file, set the Report Format and Log Format to ASCII Printer.
  • Page 37 Section 2 - Installation and Operation 2-12 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 38: Section 3:Configuring The Vm700A

    Section 3:Configuring the VM700A...

  • Page 40: Figure 3-1: Typical Main Configure Menu

    These files are arranged in a directory structure accessed using the front-panel Configure button and the touch screen menu choice. These files control such areas of VM700A operation as: Which measurements are performed in Auto mode;...
  • Page 41 These soft keys are defined as follows: Time: Pressing this soft key brings up a display and submenu that allows you to set the internal clock of the VM700A. (This procedure is described later in this section of the manual.)

  • Page 42: Configure Operations

    The exact number of directories and their names depends on the installed options. All the directories are given in alphabetical order from left to right, top to bottom. Each of the VM700A option manuals provides details on configuring the files for the options.
  • Page 43 The ~ (tilde) in a directory or file name represents a carriage return, and is used to join the first and second lines of directory, function key, or file names. VM700A Video Measurement Sets equipped with both Option 01, NTSC, and Option 11, PAL (dual-standard) provide a soft key labeled Switch NTSC/PAL in many of the Configure mode menus.

  • Page 44: Supplied Directories And Files

    Section 3 - Configuring the VM700A Supplied Directories All the directories and most of the files supplied with the VM700A are read- and Files only; they cannot be edited, renamed, or deleted. However, files can be copied to create new, editable files. Only files that you have created can be renamed or deleted.

  • Page 45: Editing Files

    6. After typing the name, touch Done to complete the creation of the file, or press Cancel to quit the process and not create the file. To Delete a File. Press the Delete soft key. The VM700A prompts you to select a file.
  • Page 46 Section 3 - Configuring the VM700A 1. If the item that you touch is not editable, the VM700A produces a “click” sound, but the screen is not changed. 2. If the item that you touch is to be edited alphabetically, a keyboard appears on the lower half of the VM700A display screen.

  • Page 47: Printing Files

    Printing Files Any VM700A file can be printed by selecting the Print File soft key and selecting the file. The file is printed from the serial port designated as the Copy Port. The LED in the Copy button lights continuously while the VM700A creates a print file, and flashes until the entire print file has been sent to the printer.

  • Page 48: Setting The Internal Clock

    To Set the Time and Date. Select (touch) the Time soft key to display the VM700A calendar and clock. The clock continues to run, but the numbers in the soft keys do not advance with the time and display the time that was present when the Time Configure menu was selected.

  • Page 49: Directory Structure

    The Source_Selection~Video file assigns a file in the Video_Source Files (File) directory to each of the VM700A signal sources (A, B, and C). When a given source is selected (that is when its front-panel Source button is on), the VM700A gets parameter information from the file in the Video_Source Files directory pointed to by the corresponding entry in the Source_Selection~Video file.
  • Page 50 (periodically scheduled reports and functions) is determined by the contents of file “My_Events” in the Timed Events subdirectory. When the VM700A is shipped, all three channel parameters and the Timed Events parameter are set to System Default. For a dual-standard VM700A (those equipped with both Option 01, NTSC, and Option 11, PAL), the Source_Selection~Video file is a little different.

  • Page 51: Figure 3-4: How The Vm700A Gets Parameter Information

    Î Î Î Î Î Î Î Î Î Î Î Î Î Î (Directory) Î Î Î Î Î Î Î Î Î Î Î Î Î Î Figure 3-4: How the VM700A gets parameter information 3-12 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 52: Video_Source~Files (Directory)

    This arrangement, whereby the file in the Video_Source Files directory defines the measurement environment while the Video Source file assigns the environ- ment to a channel, gives the VM700A maximum flexibility in meeting a variety of signal monitoring needs. Pre-defining a number of different environments...

  • Page 53: Auto_Limit Files (Directory)

    The first line of each file in the Auto_Limit Files directory is the title line for identification of the file. The second line sets the number of consecutive times the VM700A must find a value outside either of its Alarm limits before sending a report of the error to the Log Port.

  • Page 54: Communication Setup (File)

    Alarm limits may be set inside Caution limits, but then only Alarm limit violations are flagged. Communication The VM700A has two RS-232-C serial ports. Either port can be attached to an Setup (File) ASCII, Epson, HP LaserJet, or PostScript printer, or to a modem or terminal for serial communication during remote operation.
  • Page 55 Epson LQ, PostScript, ASCII Printer, HP LaserJet, HP DeskJet, and HP ThinkJet. If you have an Epson LQ, PostScript-compatible, or HP LaserJet printer, you can use the Copy function to capture any VM700A display from the Waveform, Vector, Picture, Measure, or Auto modes.

  • Page 56: Diagnostic Errors (File)

    Diagnostics The Diagnostics Selection file lists the diagnostics the VM700A can perform at Selection (File) power up. If installed options require additional diagnostics, those are also listed.

  • Page 57: Measure_Limit Files (Directory)

    Auto and Measure modes. The measurement locations file for each channel is designated in the active file in the Video_Source Files directory. For PAL, the SIS Present parameter tells the VM700A whether Sound in Sync is present (yes) or absent (no). When SIS Present is yes, measurements are made using Synchronous sampling.

  • Page 58: Measurement Results (Directory)

    NOTE. Enabling the Password function requires partial removal of the left side cover of the VM700A. Refer the instrument to a qualified service person to either change the Password enabled/disabled state or to reset the password should it become unknown for some reason.

  • Page 59: Selected Measurements (Directory)

    To Enable or Reset the Password Function. Turn off the VM700A and remove the holding screws for the left side panel. Slide the left side cover of the VM700A back to expose the 6-section DIP switch on the A5 circuit board. To enable Password, set position 3 (from the front of the DIP switch) UP.
  • Page 60 Timed Events file. The Report Port setting in the Communication Setup file must be set to Port 0 or Port 1, (not None) for reports to be generated. 3-21 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 61 Pressing the Cancel Report soft key halts the timed report execution. Once the report is complete, the VM700A returns to the mode it was in when the report began. The Copy button flashes until the report is either printed or canceled with the Cancel Copy soft key in the initial Configure menu.
  • Page 62 Enter Report or Enter Function soft key as required. The VM700A inserts a copy of the selected type above the highlighted line. That may then be edited for the new event or function to be timed.
  • Page 63 To Cancel a Timed Report in Progress. Press the Cancel Report soft key. To Cancel a Timed Function Execution in Progress. Press the Function button. This leaves the VM700A in whatever state it was in during function execution when you pressed the button.

  • Page 64: Video Source Identification (File)

    Measurement Locations file, but it should be an even number between 26 and 52 µsec.) When a start pulse is found, the VM700A checks that no part of the waveform preceding the start pulse is more than one-half the bar amplitude.
  • Page 65 Section 3 - Configuring the VM700A 3-26 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 66: Section 4:Waveform Mode

    Section 4:Waveform Mode...

  • Page 68: Introduction

    VITS on the first field in a frame, the display is slowed slightly from real-time. For NTSC, the VM700A may display any part of the two frames of two fields each. Select the frame displayed by selecting Field 1 or Field 2 for frame 1 or Field 3 or Field 4 for frame 2.

  • Page 69: Line Identification

    If more than one line is displayed, the indicator is found to the right of sync tip for each line. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 70: Horizontal Reference Line

    The first line of text displays the units for the horizontal graticule scale (microseconds or nanoseconds). This line also indicates when the VM700A is performing self-calibration. The second line gives the APL (Average Picture Level), and the on/off status of Precision mode and Sound-In-Sync (PAL only).

  • Page 71: Freeze

    Freeze When Freeze is selected by pressing the Freeze button, the VM700A acquires consecutive frames of 50 lines each and holds that information in the display memory. Therefore, it is not possible to scroll through the entire field when Freeze is selected, only the acquired lines may be displayed.

  • Page 72: Figure 4-2: Waveform Menu Tree

    NOTE. The LED in the Menu button is on when the Waveform menu is displayed. If the Menu button is pressed when the Menu LED is on, the menu is unselected (removed from the display), and the Menu LED goes off. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 73: Menu

    This row of soft keys is known as the Waveform menu. The entire Waveform mode menu tree is shown in Figure 4-2. Pressing the Menu button when the VM700A is in Waveform mode displays the Waveform menu, which is structured as follows: [1-11] H Display: resets the Waveform display to fit a specified number of lines [1 to 11] into the display.

  • Page 74: Sync

    Changing the signal source also switches the sync to the new signal source. Sound in Sync (PAL only, not shown in Figure 4-2): enables the VM700A to lock or sync to signals that contain digitally-encoded sound information in the sync pulse.

  • Page 75: Noise [0 Db - 30.10 Db]

    Screen Memory mode. This soft key prevents this from happening accidentally. It also changes cursor mode to make the knob move the cursors if they are unlocked from the waveform. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 76: Filter Select

    Adjustments outside ±300 mV may cause APL measurement problems. Clamp Slow: selects slow clamp speed. This allows hum effects to be visible, but is useful for coping with large DC offsets on an input signal. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 77: Select Line

    Select Line menu in Vector mode). See Section 5 for more information on the Vector Line. In individual measurements, the Default Line Sel. soft key changes the displayed line to the measurement line specified in the Measurement Locations file. 4-10 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 78: Cursors

    Section 4 - Waveform Mode Cursors The VM700A provides a set of cursors that enable you to make custom measurements manually with a high degree of accuracy. You can use the cursors Measure time duration Measure frequency Measure luminance or chrominance amplitudes...

  • Page 79: Moving Cursors-Lock Left, Lock Right, Center Left, And Center Right

    You can also select Freeze to stabilize the signal. Note that the VM700A bandwidth limits the signal to 6 MHz. To accurately display rise times of signals with significant frequency components between 5 MHz and 6 MHz, select Precision mode.
  • Page 80 90%. The Time from L to R: readout now indicates sync width from the 10% point of the leading edge of sync to the 10% point on the trailing sync edge. 4-13 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 81: Using Cursors To Measure Timing

    Position the sine-wave zero crossings to occur at the horizontal reference line. Select the Cursors soft key and position a zero crossing on the cursors. 4-14 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 82: Figure 4-4: Color Burst Aligned With Horizontal Reference Line

    The following example discusses the Vertical delta: readout, and its use in measuring amplitude of the color burst. Figure 4-4: Color burst aligned with horizontal reference line 4-15 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 83: Figure 4-5: Cursors Mode Indicating Color Burst Amplitude

    See Figure 4-5. The Vertical delta readout now indicates the absolute amplitude of the waveform. Figure 4-5: Cursors mode indicating color burst amplitude 4-16 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 84: Section 5:Vector Mode

    Section 5:Vector Mode...

  • Page 86: Introduction

    Section 5:Vector Mode Introduction This section provides a detailed description of the capabilities of Vector mode, and tells how to operate the VM700A as a vectorscope. Display Vector mode provides a conventional vector display. Because the display is digitally derived, a single line is displayed with full brightness. The Vector mode...

  • Page 87: Control Knob

    –V-axis burst. It has no effect on lines with a +V-axis burst. Display Select V (PAL only): toggles between display of lines with a +V-axis, a –V-axis, or both axes (default). VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 88: Figure 5-2: Vector Mode Menu

    75% Bar Cal: Rotating the knob in Vector mode changes the gain or phase angle, which can leave the VM700A uncalibrated for angle or amplitude. Touching this softkey returns Vector mode to a default calibrated state, with phase angle set to 0.0 degrees, gain to 1.000 (0.0 dB).

  • Page 89: Select Line

    Field n Line nn (NTSC)/Line n (PAL): displays the line specified by the softkey. To change the line number, select and hold the softkey to be changed, turn the knob until the new line number is found, and release the softkey. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 90 Section 6:Measure Mode...

  • Page 92: Measure Mode Menu Operation

    Section 6:Measure Mode Pressing the Measure button on the front panel puts the VM700A into Measure mode. In this mode, the VM700A provides interactive control of measurement parameters, as well as graphical display and digital readouts of measurement results. Measure Mode Menu Operation...

  • Page 93: Video Option Measurement Menu Operation

    Î Î Î Î Figure 6-2: Measure menu of Camera Video Option The menu choice of Previous Selection returns the VM700A back to the previously selected measurement. The menu choice of Leave Directory displays the next higher level of the menu hierarchy. The directories and files in the higher-level menu displays are not accessed via this route in normal operation.

  • Page 94: Section 7:Picture Mode

    Section 7:Picture Mode...
  • Page 96 Graticule hardkey is held in, turning the control knob adjusts the picture contrast. Both brightness and contrast can be reset to their default values using the Adjust/Default Brightness and Adjust/Default Contrast soft keys. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 97 Section 7 - Picture Mode VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 98: Section 8:Auto Mode

    Section 8:Auto Mode...

  • Page 100: Introduction

    The Auto mode measurements are not affected by the sync and clamping parameters set in Waveform mode for the manual measurements. Measurement In Auto mode, the VM700A lists measurement names on the left-hand side of the Identification display. Each name is followed by the measurement result, and a notation of the measurement’s reference where applicable.

  • Page 101: Comments Column

    The comment describes the nature of the problem the VM700A has in making the measurement to assist you in rectifying the problem. If the measurement is one that will not normally be available from the signal being measured, a new Selected Measurement file can be created to customize the measurements list to those of interest in your application.
  • Page 102 The first line of the file is the title line. The second line of the file, ”2 consecu- tive error(s) before reporting,” sets the number of times the VM700A must make consecutive measurements of a value that is outside the Alarm Limits before logging the error to the printer.

  • Page 103: Defining Measurement Locations

    Note that the labels Selected and Not Selected are printed below the directory window. Touch the highlighted line on the Selected side of the screen VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 104: Setting Event Times

    The Report Time is entered in 24-hour format. Any file in the Selected Measure- ments directory may be specified at any Report Time. At any Event Time, regardless of what mode it is in, the VM700A screen will blank and display a message indicating that a Timed Event is occurring. You will see the LED in a SOURCE (channel) button light when measurements are being made for a report on that channel.
  • Page 105 Section 8 - Auto Mode VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 106: Section 9:Diagnostics

    Section 9:Diagnostics...

  • Page 108: Introduction

    Section 9:Diagnostics Introduction The VM700A self-diagnostic routines evaluate each of the instrument’s major hardware components. The primary intent of the diagnostics is to provide a high degree of confidence that measurement results produced by the instrument are correct. The diagnostics can also supply useful information for board-level fault isolation.

  • Page 109: Table 9-1: Vm700A Power Up Diagnostics

    Contents of RAM are copied to main system RAM before the test runs. This preserves the contents of RAM. If main system RAM is bad, the test returns ???, indicating it did not run. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 110: Individual Diagnostics

    GOTO instructions. Optional Hardware “Pass” indicates hardware present and working; “NA” indicates hardware not available. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 111 Verifies each DAC for independence by changing the other two and monitoring the one being tested to verify that its range and bit weight remain unchanged. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 112 NTSC pattern active lines to the always-on pattern number. Likewise for PAL. Range is the arithmetic sum of the measured bit weights, and bit weights are measured as the effect of toggling only the indicated bit. VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 113: Diagnostic Measurements

    Power-Up Diagnostics When the VM700A is powered up normally, it first runs the low-level diagnos- tics, then runs the individual diagnostics selected in the Diagnostics~Selection file in directory /nvram0/ConfigFiles.

  • Page 114: Individual Diagnostics

    “selected” within the Diagnostics Selection file, located in directory / nvram0/ConfigFiles. When the VM700A is powered up, the diagnostic applications selected in the Diagnostics Selection file are automatically executed after the low-level diagnostics are completed. Results of individual diagnostics are displayed in Power-Up mode;...

  • Page 115: Bypassing Power-Up Diagnostics

    Diagnostics hold the Waveform button when you switch the VM700A on. (If the VM700A is being started cold, hold the button for three to five seconds; if the VM700A is already warmed up, one or two seconds should do it.) The AudioProcessor~Diagnostic and AudioAnalog~Diagnostic selections are available only with the VM700A Audio option.

  • Page 116: Individual Diagnostics And Measurements

    SELECT RUN MODE screen appears again. Press the Measure button to select a different diagnostic or Measure-mode measure- ment. Press any other major mode button to put the VM700A into a different mode. 3. Touching Interactive Mode runs the diagnostic, one group at a time. Results of individual tests, as well as a summary for each group of tests, appear on the display.

  • Page 117: Diagsloop

    Connecting Outputs for details on the required cable wiring. If you are connecting a PC to the VM700A, you will also have to run a terminal emulator program in order to read the information output by the VM700A.

  • Page 118: Running Remote Diagnostics In Debug Mode

    Set the switch above the “C” on the “FAC|MODE|” DIP switch to the UP position. Running Remote When the VM700A first enters Debug mode, the following menu appears on the Diagnostics in Debug terminal screen as shown in Figure 9-2.

  • Page 119: Figure 9-2: Debug Mode Terminal Screen Display

    Any files you may wish to use later should be backed up to a PC disk (using remote operations capability of the VM700A and a utility such as VMBACKIT) before this option is invoked. When you choose the Clear NVRAM Filesystem option, the following...

  • Page 120: Serial Port Setup For Low-Level Diagnostics, Debug Mode

    From this point, you can run any diagnostic, or use the soft keys to get to the Console or Diagnostic Error files. NOTE. If you want to use the VM700A after running it in High-Level Debug mode, power the instrument down and start it back up again normally to guarantee that all internal constants set during the power-up procedure are correct.

  • Page 121: Start-Up Shortcuts

    None Start-Up Shortcuts Several shortcuts are available to power up the VM700A and put it immediately into a specific mode. Each of these shortcuts involves powering up the VM700A while pressing certain combinations of front-panel keys. To use a shortcut, power down the instrument, press and hold the indicated key(s) on the VM700A, and power up.

  • Page 122: Getting Technical Support

    Console File Whenever the VM700A initializes, information is stored in the console file, located in the / (topmost) directory. If the VM700A performs an auto reset due to a malfunction, the console file may contain information useful to a service person.
  • Page 123 Section 9 - Diagnostics 9-16 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

  • Page 124: Index

    Index...
  • Page 126 3 9 H - High-Level Debug mode, 9 13 Cancel Copy, 3 2 N - Normal (Power Up) mode, 9 11 Cancel Copy soft key, 3 8 Index–1 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 127 Individual Diagnostics, 9 3, 9 7 Expansion, Waveform, 2 5 Individual Diagnostics and Measurements, 9 9 Expansion point, 2 5 inputs, 2 6 Extra Functions, 4 8 Instrument Overview, 1 1 Index–2 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 128 Print File softkey, 3 8 measurement printer deselection, 3 21 Apple LaserWriter, 2 10 selection, 3 21 ASCII, 2 11 Measurement Locations, Defining, 8 4 EPSON LQ-570, 2 9 Index–3 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 129 Display Select V (PAL only), 5 2 signal sources (A, B, and C), 3 10 Field n Line nn (NTSC)/Line n (PAL), 5 4 Sound in Sync, 3 18, 4 7 Index–4 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...
  • Page 130 Vertical interval automatic scan, 8-4 waveform expansion, 2 5 Video Source, 3 10 Waveform mode menu, 4 6 Video Source Identification Number, inserting, 3 25 Waveform Positioning, 2 5 Violated Limits, 8 2 Index–5 VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual...

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