Factory DefaultsThe factory default preset recalls the instrument to the standard configuration.

WaveformA paraded display of the digital component signal is shown as YPbPr. This allowseach component of the signal to be displayed separately. The luma signal Y isdisplayed on the left side of the screen with a typical amplitude ranging between0-700 mv. The color differencesignals Pb and Pr are offset so thatthe zero point is at the 50% point ofthe waveform display. The typicalrange of Pb and Pr is +/-350 mv.Therefore, by applying the offset,the maximum excursion of the colordifference signal and luma signalscan be easily compared. When100% color bar components areapplied, these signals extendto the maximum legal limits ofthe signal components.

VectorA vector display is an X-Y plot of the color difference signals Pb and Pr. No informationfrom the luma component is present within the vector display. The display can bescaled by the user for 100% or 75% targets. The components should then fit within

the appropriate boxes for each Pb/Prcomponent when a color bar signal isapplied. In this example, theARIB/SMPTE high definition color barpattern has been applied to the input.This pattern contains both 75% and100% color bar saturations.

PicturePicture mode renders the videodisplay into a tile of the XGA outputof the WVR Series. This allows theuser to observe the currentlyapplied video input programcontent. Additionally, the waveformmonitor can provide visualindication within the picture of wheregamut alarms are exceeded withinthe image, if the user selects thisoption within the configuration menu. If the instrument is in line select mode, a brightup line within the picture display provides an on-screen indication of the line whichis currently selected.

AudioIf the audio option is installed withinthe WVR Series, Tile 4 will displayaudio level bars of 8 audio channelsand a lissajous display of one of theselected audio pairs. The audio inputcan be analog or AES/EBU digital orde-embedded from the SDI signal,depending on which type of option isinstalled within the unit. Only oneaudio tile can be selected to display

audio. The user can configure the test tone level and peak level for the audio bardisplays for particular facilities standards. The ballistics of the meter can also beconfigured between VU, Peak, True Peak and PPM. If the audio option is not installedthis display is replaced with the Lightning display.

Two Field WaveformThis waveform display showsthe Y signal in a two field displaymode. This shows the relativeposition of the fields related to thereference signal.

Timing DisplayThe timing display shows a full color frame time within the black rectangle. The centercrosshair shows the reference point. When the circle is in the same location as thecrosshair, the input signal and the external reference are correctly timed together. Inthis example, the circle’s vertical position represents a number of lines offset from thereference. Advance time conditions are represented in the upper part of the displayand delayed time conditions are represented in the lower half of the display, as in this

example. The horizontal position ofthe circle provides information aboutthe µs offset from reference time.When the circle cursor moves towardthe left-hand side, this indicates anadvanced time condition. In a similarmanner, when the circle movestoward the r ight-hand s ide,th is indicates a delayed timecondition, as in th is case. Finet im ing ad jus tmen ts can bemade by referring to the numericalreadout in the display.

Two Field MAG of V BlankingThis waveform d isp lay is amagnification of the two fielddisplay centered around the verticalblanking interval. Cursors havebeen placed at the beginning andend of blanking to measure theduration of field blanking.

Two Line MAG of H BlankingT h i s w a v e f o r m d i s p l a y i s amagnification of the two line displayof the Y signal centered around thehorizontal blanking interval. Cursorshave been placed at the beginningand end of blanking to measure theduration of the line blanking interval.

Upper WFM MAGWhen aligning video levels of the tape leader or test signal, it is important to ensurethat the upper and lower amplitudes of the signal are correctly set up. To easily viewthe waveform with increased precision, the variable gain function of the WVR Seriescan be maximized to show the upper portion of the YPbPr paraded waveform displayin the upper half of the tile. This allows the operator to easily make adjustmentsto the proc-amp controls of therecording device and ensure the700 mv level is obtained for theupper part of the signal. Cursors areplaced on the screen to indicate the700 mv amplitude of the signal andto allow accurate alignment of thecolor bar levels.

Tektronix LightningThe Lightning display is similar to a vector display except that it incorporates the lumachannel into the display. An X-Y plot of luma versus Pb is plotted in the upper part of thedisplay and an X-Y plot of luma versus Pr is plotted in the lower part of the display. Byensuring that the color components fall with the graticule boxes, quick and easyadjustment of the proc-amp controls can be made. If this signal is stretched orcompressed in the horizontal direction, adjustment of the chroma signal is required. If thesignal is stretched or compressed in the vertical direction, then adjustment of the luma orsetup controls is required. Once the signal is correctly aligned with color bar signalelements within each of the boxes, the green-magenta transition should pass through thecenter of the crosshairs on the upper and lower graticule tic marks. If this does not

happen, there is a timing errorbetween the components of the signaland a bending of the signal will occur.The amount of this bending representsthe relative signal delay between lumaand color-difference signals. Theupper half of the display measures theP’b to Y’ timing, while the bottom halfmeasures the P’r to Y’ timing. If thetransition bends in toward black, thecolor-difference signal is delayed withrespect to luma. If the transition bendsout toward white, the color differencesignal is leading the luma signal.

Lower WFM MAGBy clever adjustment of the variablegain function, horizontal, andvertical position controls of thewaveform monitor, the lower portionof the waveform parade is displayedin Tile 3. Cursors are placed on thedisplay to show the 0 mv amplitudeof the signal. This allows easy andaccurate alignment of the colorbar black proc-amp levels.

AudioThe audio display shows the levelbars and l issajous display. Theuser can independently select eachchannel pair to be displayed on thelissajous display. The lissajous displayis an X-Y plot of the selectedchannels. In the soundstage mode asshown, when the audio channelshave the same frequency and amplitudeand are in-phase they produce a

vertical line on the lissajous display. A correlation meter below the lissajous display andeach channel pair quickly will show channel to channel correlation. In this example, thegreen diamonds within the display indicate that the correlation is at +1 and the signalsare in-phase. In this case, the True Peak ballistic was selected, the test level has beenset at -18 dBFS, and the peak level is set to -8 dBFS in the configuration menu.

YRGB Parade WFMIn color correction or camerabalancing of the RGB components, itis useful to be able to see the effectthat these adjustments have on theluma Y signal. This waveform displayshows a parade display of the YRGBcomponents. Cursors have beenplaced at the EBU-R103 RGB gamutlimits of +/-5% so that excursions ofthe signal can be noted. If the gamutlimits are exceeded, a warningappears at the bottom of the display.

Tektronix Split DiamondThe Split Diamond display is a simple method to easily view RGB gamut complianceand quickly identify the component in error. When the signal falls within the graticulelimits of the display, the signal is within RGB gamut compliance. If a portion of thesignal falls outside of the limits, the component in error can be quickly identified.Errors in green amplitude affect both diamonds equally, while blue errors affect only

the top diamond and red errorsaffect only the bottom. The centerof the display represents the lowerblack region of the signal and theupper and lower points of thediamond represent the white limitsfor the signal. A straight line fromthe center to the outer point ofthe diamond indicates a correctlybalanced luma only signal. The gamutlimits are adjustable within theconfiguration menu. In this case theEBU-R103 limits were applied.

Pseudo Composite Flat/Low PassTo assist in ensuring compositegamut limits of the signal, the WVRSeries digitally creates a pseudocomposite mode from the digitalinput signal. This allows the userto visualize the encoded compositeoutput of the final signal without theneed for an encoder. In this example,a filter parade mode showing boththe full and luma only signals isshown. In this case the cursor limits for the composite signal are applied to allow easyidentification of the signal components exceeding luma limits.

Tektronix ArrowheadThe Arrowhead display provides asimple method to view compositegamut compliance. If the signalelements fall within the graticulelimits of the display, the signal iscompliant. If a signal element fallsouts ide these l imi ts , i t can bequickly identified. Luma adjustmentsaffect the vert ical axis of theArrowhead waveform display. Chroma

adjustments affect the horizontal axis of the Arrowhead display. By using theproc-amp controls of the device being monitored, simple adjustments will keep thesignal within the Arrowhead graticule limits. The luma graticule limits are shown onthe left-hand vertical side of the Arrowhead display and luma+chroma limits areshown on the right-hand diagonals of the display.

Session Display for Quality Assurance ApplicationDuring the recording of video and audio material, it is important to monitor the video and audio content. The video should not exceed the allowed gamutrange, the audio levels should not exceed limits, or create pops, mutes or clicks during the recording process. Within the WVR Series, a variety of theseparameters can be continually monitored and displayed as session screens or an event log. The event log provides a list of when the errors occurredrelative to the internal clock of the instrument or to timecode. The event log is useful to review upon completion of the material recording or editingprocess. All errors from the session will be assessed. The user can also download the error log via the Web interface and save them as a fileor print out the log results to be attached to the recorded material.

YPbPr ParadeThe YPbPr parade display allowsthe user to monitor the signalwhile it is being recorded and tovisually observe any errors withinthe content. Indicators of gamuterrors for RGB and Composite areshown in the lower status title baras alarms.

Audio with LissajousThe audio display shows the levelbars of up to 8 channels of audio.In this case, channels 2 and 3 haveexceeded the peak threshold sincethe bars have gone above the redpeak value. The True Peak values arealso shown within the audio bardisplays. The yellow diamond beneathchannels 3/4 & 5/6 indicates acorrelation value of 0 between thechannels. This indicates thereis little correlation.

Video SessionThe video session screen provides acurrent view of format parameterssuch as SAV Placement, Field Length,Line Length and Line Number Error.Statistics are gathered on CRC/EDHerrors, RGB, Composite and Lumagamut. If a capitalized letter isshown, this indicates that the gamutlimit has exceeded the upper threshold. If a non-capitalized letter is shown, thisindicates that the lower gamut limit has been exceeded. For example, R __g_indicates that the upper Red component has exceeded the gamut threshold and thatthe lower Green component has also exceeded its lower threshold limit.

Audio SessionT h e a u d i o s e s s i o n s p r o v i d einformat ion on the C l ips , Overranges, Mutes and Silence thathave occurred during the runningof the monitored statistics. Theoverall peak and high audio levelis also noted for each of thechannels. By selecting the Error

Log from the Status menu or by downloading the session from the Web userinterface, the user can view the log and determine when these errors occurredrelative to internal clock or timecode (if available).

Line SelectionLine Select of Y ChannelThis waveform display example is aone line display view. Line Select isenabled, so the user is viewing asingle line within the video field. Theselected line number is displayed inthe lower part of the display. Thedigital processing of the WVR Seriesallows the individual line to bedisplayed as bright as the normalwaveform mode. Only one waveformtile of the display can be in LineSelect mode.

PictureThe picture mode is selected and thebright-up cursor shows the locationof the selected line currently beingviewed in one of the waveform tiles.

One Field V BlankingThe Y waveform is displayed in onefield mode. In the configuration menuof the unit, it is possible to enable afield cursor. The location of theselected line will be shown by thecursor bright-up within the display.

VectorThe vector display shows all lines ofthe signal present within the image.This vector display example is set upfor 75% bars.

monitoringhas a whole new look... yours.

FlexVu™ Technology:The information you need,

displayed the way you want it.The WVR Series of rasterizers offers aunique method for configuring a variety ofdifferent views of the video signal withinfour tiles. This display technology is calledFlexVu™ and allows the user to customizetheir measurement requirements to aspecific task. Configuring each of the four

tiles with different displays is like having four instruments withinone unit. These configurations can be saved as a preset withinthe unit and quickly recalled.

The independent tiles are selected using theDisplay Select buttons. The measurementfunction can then be selected by the userfor each individual tile.

The measurements are selected fromthe following available Measure Select

functions. Pressing and holding either the Measurement Selectbutton or Display button will display the menu selections availablefor that measurement. Within the FlexVu™ four tile displays, onlyone Audio Measurement function can be selected at a time andonly one waveform tile display can be in Line Select mode.

Tile 1 Tile 2

Tile 3 Tile 4

HD and SD Video TimingThe wide variety of video standards in high definition and the complexityof using black burst or tri-level sync as external references have madeit challenging to ensure correct timing between the various videostandards. Tektronix has developed a timing display with an intuitiveinterface to help ensure correct timing between the varieties of differentsignal standard combinations.

Tape Quality Assuranceand Line-up SetupIn setting up material to be recorded to disk or tape, a leader of colorbars and test tones is normally used. This configuration of the FlexVu™

display allows easy monitoring and adjustment of the signal levels.

Gamut MonitoringThis application is used with telecine color correction, camerabalancing, graphics production and editing areas to ensure that the video levels are within format limits when transformed between formats RGB, YPbPr and Composite. The four tile display provides a method to monitor and adjust both RGB and composite gamut compliance simultaneously.

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Contact Tektronix:

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For other areas contact Tektronix, Inc. at: 1 (503) 627-7111

Last Update August 13, 2004

For Further InformationTektronix maintains a comprehensive, constantly expanding collection ofapplication notes, technical briefs and other resources to help engineersworking on the cutting edge of technology. Please visit www.tektronix.com

Copyright © 2004, Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents,issued and pending. Information in this publication supersedes that in all previously published material. Specificationand price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All othertrade names referenced are the service marks, trademarks or registered trademarks of their respective companies.

08/04 CMD/PP 24W-18002-0

monitoringhas a whole new look... yours.

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