VM700T User_Manual_EN

VM700的英文操作手册

User Manual

VM700T Video Measurement Set

Option 20 Teletext Measurements

070-9652-01

This document applies to firmware version 1.02e

and above.

VM700的英文操作手册

Copyright © Tektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers andare protected by United States copyright laws and international treaty provisions.

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Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedesthat in all previously published material. Specifications and price change privileges reserved.

Tektronix, Inc., 14200 SW Karl Braun Drive, Beaverton, OR. 97077

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

VM700的英文操作手册

Table of Contents

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the Option

Configuring the Teletext Measurement Limit File. . . . . . . . . . . . . . . . . . . . . . . .

Create a Teletext Measurement Limits File. . . . . . . . . . . . . . . . . . . . . . . . .

Editing a Teletext Measurement Limit Text Parameter. . . . . . . . . . . . . . . .

Deleting a Teletext Measurement Limit File. . . . . . . . . . . . . . . . . . . . . . . .

Configuring the Video Source Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Editing the Video Source File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Changing the Video Source Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the Source Selection Video Files. . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifying a Video Source File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurement Results Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Basics

Function Key Special Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measure Mode Menu Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Teletext Timing Measurement Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Teletext Eye Measurement Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Teletext Histogram Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Teletext Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Eye Measurement Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Eye Measurement Parameters Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cursors Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Acquire Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Special Position Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SoundInSync Eye Measurement Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SoundInSync Histogram Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SoundInSync Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Eye Measurement Parameters Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cursors Submenu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remote Commands and Keywords

Command Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Teletext measurement Remote Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

execute application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

get keyword [channel-letter]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

getresults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VM700T Option 20 Teletext Measurements User Manualiii1–31–51–71–81–91–101–101–111–111–122–12–12–22–42–62–72–72–72–82–92–102–102–112–122–142–152–152–162–162–173–23–23–23–23–3i

VM700的英文操作手册

Table of Contents

Index

List of Figures

List of Tables

iihardkey button_name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3set keyword [channel_letter] value1 [value2 ...]. . . . . . . . . . . . . . . . . . . . . 3–3show filename. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4softkey softkey_name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4Get and Set Command Keywords. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5J Group: Teletext Configuration (NTSC). . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5K Group: Teletext Configuration (PAL). . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5Function Key Special Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6Figure 1–1: The configure menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2Figure 1–2: Configure menus options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2Figure 1–3: Creating a new file. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3Figure 1–4: Teletext (NTSC) System Default file. . . . . . . . . . . . . . . . . . . . . . . 1–4Figure 1–5: Teletext and SoundInSync (PAL) System Default file. . . . . . . . . . . 1–5Figure 1–6: File naming keyboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6Figure 1–7: Channel Configuration System Default file. . . . . . . . . . . . . . . . . . . 1–9Figure 1–8: Source Selection Video file. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11Figure 1–9: Teletext measurement results file. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–12Figure 1–10: SoundInSync measurement results file. . . . . . . . . . . . . . . . . . . . . 1–13Figure 2–1: Measure Mode menu choices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2Figure 2–2: Teletext timing display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3Figure 2–3: Teletext Eye display (without histogram). . . . . . . . . . . . . . . . . . . . . 2–4Figure 2–4: Teletext Eye display (with histogram). . . . . . . . . . . . . . . . . . . . . . . 2–6Figure 2–5: Teletext menu tree. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8Figure 2–6: Teletext Special Position display. . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11Figure 2–7: SoundInSync Eye display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12Figure 2–8: SoundInSync Histogram display. . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14Figure 2–9: SoundInSync menu tree. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15Table 3–1: Button Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3Table 3–2: J Group Keywords: Teletext Configuration (NTSC) . . . . . . . . . . . . 3–5Table 3–3: K Keywords: Teletext Configuration (PAL) . . . . . . . . . . . . . . . . . . . 3–6VM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Preface

The VM700T Video Measurement Set Option 20 (Teletext) gives you access totwo additional measurements: “Teletext” and “SoundInSync.” These measure-ment applications determine various parameters related to the transmission ofdigital information in the vertical interval and in the sync pulse, respectively. Themanual contents are arranged as follows:

Configuring the Option describes how to configure the Teletext Measurementoption of the VM700T Video Measurement Set.

Operating Basics describes operation of the VM700T Video Measurement SetTeletext option. Teletext measures parameters related to the transmission ofdigital information in the vertical interval of a teletext signal. SoundInSyncmeasures parameters related to the transmission of digital information in a

sound-in-sync pulse. The measurements, menus, and displays for these featuresare found in this section.

Remote Commands and Keywords describes the remote commands and keywordsthat are added to perform the option measurements and get measurement resultsAbbreviated instructions for operating the instrument using remote control arealso found in this section. For more complete information about remote control,see the VM700T RS-232 Interface Programmer Manual. If you have Option 48,the GPIB interface option, installed refer also to the VM700T Option 48 GPIBInterface Programmer Manual for added information on GPIB remote operation.

VM700T Option 20 Teletext Measurements User Manualiii

VM700的英文操作手册

Preface

ivVM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

This section describes how to configure the Teletext Measurement option of theVM700T Video Measurement Set.

The Teletext soft key appears in the Video Options directory window whenOption 20 is installed in your VM700T. The SoundInSync soft key appears inthe Video Options directory window when Option 20 is installed in yourVM700T with PAL or dual-standard software.

To view the Video Options directory window, press the Measure button on thefront panel. If the VM700T was in the Video Options directory when you lastused Measure Mode, the Video Options directory will be displayed. Otherwise,press the VideoOptions soft key at the bottom of the display to view the VideoOptions directory.

Configuring the VM700T Teletext Measurement option is similar to using itsother video functions. A series of files and directories provide default parametersthat the VM700T uses to measure video signals. If your application requiresparameters other than the defaults supplied with the VM700T, you can configurethe Teletext Measurement option according to your preferences. To configure anduse new parameters in Teletext measurements you must do the following tasks:H

H

HCreate your own Teletext Measurement limits file (for example, NewLimits)and configure it with your limits.Create your own Video Source file (for example, NewSource) and selectNewLimits as the limits file to use.Configure the Source_Selection Video file to select the NewSource file as asource file for one or all of the channels (A, B, or C) as needed for your

measurements.

Use the following steps to create and configure new files:

1.Press the Configure button to begin configuration of the Teletext Measure-

ment option. The screen displays a memory use indicator, information aboutinstrument option versions, and four soft keys (touch-screen buttons) asshown in Figure 1–1.

VM700T Option 20 Teletext Measurements User Manual1–1

VM700的英文操作手册

Configuring the Option

1–2

Nonvolatilememory:used52416bytes,free995904bytesusedfree5%95%VMā700TVideoMeasurementSetxxxxxx xxxxOption01NTSCVersion2.09Option11PALVersion2.09Option40AudioVersion1.05Option30ComponentVersion1.01Option20TeletextVersion1.01Option1GEcho/RoundingVersion1.00Option21CameraTestingVersion1.02TimeConfigureFunctionOptionFilesKeysKeyFigure 1–1: The configure menu2.Touch the ConfigureFiles soft key to begin configuration. The screendisplays a series of options in a window as shown in Figure 1–2. Scroll thewindow to view the Teletext choices by turning the front panel knob.

In/nvramØ/ConfigFilesSwitchPrintLeaveNTSC/PALFileDirectoryFigure 1–2: Configure menus optionsVM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

Configuring the Teletext Measurement Limit File

Touch the Teletext soft key to enter the Teletext Measurement limit filedirectory. The screen displays the system default file and (if any have been

created) user limit files (see Figure 1–3). You can touch a soft key to display theparameters in any file, but parameters of the system default files cannot bechanged.

The system default files shown in Figure 1–4 and Figure 1–5 are used to describethe measurement limits and sources for the Teletext and SoundInSync automeasurements. The control knob is used to scroll the choices into view.

If a default Teletext file is acceptable, the VM700T uses it (if it is the selectedfile) to measure input video signals. You can modify the Teletext limits from thesystem defaults by creating a new measurement limit file to edit.

Figure 1–3: Creating a new file

VM700T Option 20 Teletext Measurements User Manual1–3

VM700的英文操作手册

Configuring the Option

1–4SystemDefaultTeletextOptionConfigurationLocationsFieldLineTeletext115LimitsLowerUpper`1'`0'Level482.0EyeLevel-18.0518.0EyeHeight(%)70.018.0EyeHeight(mV)350.0100.0P-PWidth(%)70.0500.0P-PAmplitude100.0100.0Run-InAmplitude(%)(mV)500.0130.0Run-InStart9.0650.0DataBits(usec)14.011.0DataLineEndtoWidth(bits)Sync(u(usec)52.018.059.0Run-InAmplitude(mV)sec)1.00482.03.00518.0Line22Showing /rom/ConfigFiles/Teletext/NTSC/System~Default"No&ExitChangeFigure 1–4: Teletext (NTSC) System Default fileVM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

SystemDefaultTeletextOptionConfiguration

Locations

TeletextLine

Limits

`1'Level`0'LevelEyeHeight(%)EyeHeight(mV)EyeWidth(%)P-PAmplitude(%)P-PAmplitude(mV)DataTiming(usec)Run-InStart(usec)Run-InBits(bits)DataLineWidth(usec)DataEndtoSync(usec)Run-InAmplitude(mV)

SoundInSync

`3'`2'`1'`0'EyeEyeEyeP-PP-PLevel(mV)Level(mV)Level(mV)Level(mV)Height(%)Height(mV)Width(%)Amplitude(%)Amplitude(mV)370.0137.0-97.0-330.070.0163.070.0100.0700.0

Line36

Showing /rom/ConfigFiles/Teletext/PAL/System~Default"

NoChange&Exit430.0197.0-37.0-220.0100.0230.0100.0130.0910.0Lower420.0-14.070.0323.070.0100.0462.011.09.014.052.01.00420.017Upper504.014.0100.0562.0100.0130.0600.013.011.018.059.03.00504.0

Figure 1–5: Teletext and SoundInSync (PAL) System Default file

Complete the following tasks to modify Teletext Measurement limit fileparameters:

Create a Teletext

Measurement Limits FileThe system default files cannot be altered. If you wish to alter the defaultparameters you must set up new files that can be edited for your measurement

requirements.

1.Touch the CreateFile soft key (see Figure 1–3). The query line (the top

line of the display) then asks you to select a file template for your new file.

1–5VM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

1–62.Touch the soft key of the file you want to use for a template (for example,SystemDefault).3.A keyboard displays as shown in Figure 1–6.4.Type the new file name, observing the following rules and noting the specialuses of some characters and keys:HSpaces are not allowed in file or directory names; use an _ (underline) or. (dot) to separate words in a name.HForward slash (/) and reverse slash (\) are not permitted in the file name.HWhen neither and uppercase English alphabet characters. The lowercase Set1 norSet2 is highlighted, you can type lowercaseSet1 characterset allows you to enter numerals and punctuation characters. Theuppercase Set1 and the Set2 character set allow you to enter variousspecial characters and accented characters for use in non-Englishlanguage file names.Both the Set1 and Set2 character keys and the Shift soft key “lock”when selected. Set1 and Set2 are unlocked by touching the same keyagain or touching the unselected key of the pair. Shift is unlocked bytouching Shift again.HA maximum of 31 characters are allowed in a file or directory name.

Please enter file name (max 31 characters)qwertyuiopasdfghjklBackzxcvbnmReturnCancelSet1Set2SpaceShiftDoneFigure 1–6: File naming keyboardVM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

HUse only uppercase and lowercase letters, numbers, and the followingpunctuation characters: _ (underline), . (dot), — (minus sign), + (plus

sign), : (colon), and ~ (tilde) in names. Avoid using punctuation

characters other than those mentioned above in a directory or file name.Multi-line directories and file names can be entered using the Returnkey. Touch Return on the touch-screen keyboard to get to the second

line.

When the VM700T is in remote mode, the return character becomes atilde (~) character for purposes of file name reference. Thus, a directorywhose name is displayed as:JOHN

SMITHHH

in the directory display becomes JOHN~SMITH when referred to in aremote operation.

5.Touch the Done soft key when you have named the file. The VM700T

displays the new file containing the Teletext Measurement limits from thefile you selected as the template. You can edit the parameters in this file.(Press Cancel instead of pressing Done if you do not want to create the newfile.)

Editing a Teletext

Measurement Limit

Text ParameterTo change any Teletext Measurement limit text parameter:1.In the editable file, rotate the knob to highlight the line that contains the

parameter you want to change. This includes the title line in the configura-tion file. Use a descriptive title to easily identify it later. (This does notchange the name of the file.)

2.Touch the parameter you want to change. A box highlights the parameter.

3.Rotate the knob to increase or decrease the value of a parameter.

4.Touch the AcceptInput soft key to accept the change. The highlight box

disappears and the new parameter displays.

VM700T Option 20 Teletext Measurements User Manual1–7

VM700的英文操作手册

Configuring the Option

Deleting a Teletext

Measurement Limit File

1–8NOTE. If you change a parameter and do not want to save the change, touch theNoExitChange soft key again to verify that you want to exit without changing anything.&Exit soft key. The VM700T asks you to touch the NoChange&To display the file you created, touch its soft key.When making extensive changes to a file, avoid losing changes by touching theUpdateyou make a mistake and must exit the file, earlier work is retained while the most&Exit soft key after each change, then re-enter the file. That way, ifrecent change (or mistake) is eliminated.To delete a modified Teletext Measurement limit file:1.Touch theDelete soft key in the Teletext files directory. The query line (thetop line of the display) asks you to select a file to delete.2.Touch the soft key of the file you want to delete. The VM700T begins thedeletion process. The file is deleted when its soft key completely disappearsfrom the screen.NOTE. Touch the Cancel soft key (replaces the Delete soft key when deletionbegins) to halt the deletion process. You can also halt file deletion by touchingthe file soft key.3.Touch the LeaveDirectory soft key to return to the Configure menus.VM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

Configuring the Video Source Files

If the system default Channel Configuration file for video sources is acceptable,the VM700T uses this file as it performs video measurements. In the

System~Default Video_Source File shown in Figure 1–7, choices for the

installed options needing video sources are listed. This file is not editable. If youmust select a source file other than the default file selection, you will have tocreate a new file that can be edited.

To modify file parameters you must do the following:

Hcreate a file

Hselect the existing file to be used as a template

Hname the file you created

Hedit the information in the new file as needed

Haccept the edits

Hsave the changesChannelConfigurationSystemDefaultFile

AutoMeasureLimitsFile:EndToEnd

MeasurementLimitsSystem~Default

SelectedLocationFile:System~Default

AutoMeasurementFile:FileSystem~Default

SourceSyncName:SourceLocked

VideoPrintoutTitle:LockedtoSource

VMā700TtoVideoSourceMeasurementSet

Options:

EchoTeletextandRoundingSystem~Default

ComponentSystem~DefaultSystem~Default

Line15

Showing /rom/ConfigFiles/Video_Source~Files/NTSC/System~Default"

No&ExitChange

Figure 1–7: Channel Configuration System Default file

VM700T Option 20 Teletext Measurements User Manual1–9

VM700的英文操作手册

Configuring the Option

Editing the Video

Source File

Changing the Video

Source Parameters

1–10To modify the Video Source file:1.Touch the CreateFilesoft key. The query line (the top line of the display)asks you to select the file to use as a template for your new file.2.Touch the appropriate soft key for the file you want to use (for example,SystemDefault). A keyboard displays.3.Type the name for your new file.4.Touch the Done key. The VM700T displays the contents of the new file thatcontains the Video Source data from the file you selected as the template.You can modify parameters in this file.To change the Video Source parameters:1.Rotate the knob to highlight the line that contains the parameter you want tochange (in this case, highlight the line Teletext:System~Default).2.Touch the desired parameter (for example, touch Teletext:System~Default). A box highlights the selected parameter.3.Rotate the knob to change the parameter or value (select the name of the newVideo Source file).4.Touch the AcceptInput soft key to accept the change. The highlight boxdisappears and the new parameter displays.5.Touch the Update&Exit soft key to save the change and return to theVideo Source Files menu.NOTE. If you change a parameter and don’t want to save the change, touch theNoExitChange soft key again to verify that you want to exit without changing anything.&Exit soft key. The VM700T asks you to touch the NoChange&For more information about the other selections in the Video Source file, see theuser manual for your NTSC, PAL, or dual-standard VM700T Video Measure-ment Set.VM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

Configuring the Source Selection Video Files

The source channel, A, B, or C, for the video signal is configured in the SourceChannel Selection file to accept NTSC or PAL sources as appropriate for theapplication (see Figure 1–8). If you have created a new Video Source File, youcan edit the Video Source File Name parameter in this file to select it. If youhave a single standard instrument (Option 01 NTSC or Option 11 PAL only),the Video Source File Name column shows only the video standard installed.You can select a Video Source file from the Source Selection Video (if youintend to use a source file other than the system default) for each of threesources.VideoStd.NTSVideoSourceFileName

System~DefaultSystem~DefaultSystem~DefaultSystem~DefaulturceFileName PALVideoSoSystem~DefaultSystem~DefaultSystem~Default

Line8SourceA:NTSCSourceB:PALSourceC:NTSCTimedEvents:

Editing /nvram0/ConfigFiles/Source_Selection~Video"

AcceptInput

Figure 1–8: Source Selection Video file

Specifying a Video

Source FileTo specify a Video Source file:1.Rotate the front panel knob until Source_Selection Video displays.

2.Touch the Source_SelectionVideo soft key. The Source_Selection Video

file is then seen.

3.Rotate the front panel knob to highlight the source for which you are

specifying a Video Source file (source A, B, or C).

4.Touch the highlighted source file to select it. A box highlights the selected

file.

5.Rotate the front panel knob to change the Video Source file selection.

6.Touch the AcceptInput soft key. The highlight box disappears and the new

source displays.

VM700T Option 20 Teletext Measurements User Manual1–11

VM700的英文操作手册

Configuring the Option

7.Touch the Update&Exit soft key if the change is correct. The ConfigFiles

menu displays. If the change is not correct, touch the NoChange&Exitsoft key.NOTE. If you change the Video Source file and do not want to save the change,touch the AcceptInput soft key, then touch the NoChange&Exit soft key.The VM700T asks you to touch the NoChange&Exit soft key again to verifythat you want to exit the Source Selection Video directory and cancel anychanges.

Measurement Results Files

The measurement results for Teletext and SoundInSync (for PAL and dual-stan-dard instruments) are kept in the Measurement Results files. The results of themost recent measurement are stored here and can be viewed by selecting theTeletext or the SoundInSync results file. The following displays (see Figure 1–9and Figure 1–10) show examples of the data contained in the MeasurementResults files.

MeasurementResults

TeletextField=1Line=15Accumulation400timesTimingAverageOff

(EyeThreshold=1/250)EyeHeight45.928.1(AtClock)EyeWidth58.1(AtMiddle)`1'Level66.0`0'Level4.7P-PAmplitude156.896.1Run-InStart9.91Run-InBits16.0DataLineWidth50.32DataEndtoSync3.32Run-InAmplitude52.7%IRE%IREIRE%IREusecbitsusecusecIRE**********ChannelAFriAug3016:19:59Waveform->Teletext70.049.070.067.5-2.5100.070.052.001.0067.5100.070.0100.072.52.5130.091.059.003.0072.5

Figure 1–9: Teletext measurement results file

1–12VM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Configuring the Option

MeasurementResults

SoundInSyncLine=96(SISmode)Accumulation200times

(EyeThreshold=1/250)EyeHeight86.2201.0(AtClock)EyeWidth77.5(AtMiddle)`3'Level370.8`2'Level147.1`1'Level-86.1`0'Level-310.9P-PAmplitude106.0722.5ChannelAFriAug3016:37:29%mV%mVmVmVmV%mV

Figure 1–10: SoundInSync measurement results file

VM700T Option 20 Teletext Measurements User Manual1–13

VM700的英文操作手册

Configuring the Option

1–14VM700T Option 20 Teletext Measurements User Manual

VM700的英文操作手册

Operating Basics

The VM700T Video Measurement Set Teletext option measures parametersrelated to the transmission of digital information in the vertical interval. Thismeasurement requires a teletext signal. Running the Teletext measurement writesa file called Teletext into the Measurement Results directory.

SoundInSync measures parameters related to the transmission of digitalinformation in the sync pulse. This measurement requires sound in the syncpulse to guarantee proper operation. Running the SoundInSync Measurementwrites a file called SoundInSync into the Measurement Results directory.

Function Key Special Feature

A special feature enables Teletext and SoundInSync measurements on signalswith offsets in the sync level such as found in scrambled video. The procedurerequires that the measurements be called from a Function Key. Refer to FunctionKey Special Feature on page 3–6 for more information.

Measure Mode Menu Operation

Measure mode is used for making interactive measurements of NTSC and PALsignal properties, and accessing the measurements of any installed options asshown in Figure 2–1. This is different from Auto Mode, which is used for

automatic, non-interactive, and continuous execution of user-specified measure-ments.

To view the Video Options directory window, press the Measure button on thefront panel. If the VM700T was in the Video Options directory when you lastused Measure mode, the Video Options directory displays. Otherwise, touch theVideo Options soft key at the bottom of the display to view the Video Optionsdirectory. Touch theTeletextsoft key to display the measurement selectionsfor the Teletext option.

VM700T Option 20 Teletext Measurements User Manual2–1

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