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User Manual VM700T Video Measurement Set Option 30

1. 000 3 2 execute application i iue REESE OE Ee Oe 3 2 get keyword channel letter cesses 3 3 getresults s uie pin d ec bere e pe Re 3 3 hardkey button name l eeeeeee me 3 4 set keyword channel letter valuel value2 lesus 3 4 show filename e ARES ek ees T Es OY ICE Ee a 3 5 softkey soffkey name cles 3 5 Get and Set Command Keywords 0 00 0 cee ee eee eee 3 5 VM700T Option 30 Component Measurements User Manual Table of Contents List of Figures Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 2 1 Figure 2 2 Figure 2 3 The Configure menu ccc cc ccc csccsceecs 1 2 Configure menus options eene 1 2 Component measurement limit menu choices 1 3 File naming keyboard eeeeeees 1 4 Creating a new file eeeeeeeeere 1 5 Selecting a file to use as a template 1 8 Measure mode menu choices eese 2 1 Bowtie display showing nearly ideal waveform 2 2 Bowtie display showing waveform with relative timing and amplitude errors cc cece cece rere eee 2 3 Figure 2 4 Figure 2 5 Bowtie menu tree cc cece cece cece cece ceeee 2 4 Channel delay display showing color difference Component delays cc ccc ccc c eens cece a E 2 6 Figure 2 6 Figure 2 7 levels in Fig
2. Forward slash and reverse slash V are not permitted in the file name When neither Set 1 nor Set2 is highlighted you can type lowercase and uppercase English alphabet characters The lowercase Set1 character set allows you to enter numerals and punctuation characters The uppercase Set1 and the Set2 character set allow you to enter various special characters and accented characters for use in non English language 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 key again or touching the unselected key of the pair Shift is unlocked by touching Shift again A maximum of 31 characters are allowed in a file or directory name Use only uppercase and lowercase letters numbers and the following punctuation 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 VM700T Option 30 Component Measurements User Manual Configuring the Option m Multi line directories and file names can be entered using the Return key Touch Return on the touch screen keyboard to get to the second line m When the VM700T is in remote mode the return character becomes a tilde character for purposes of file name reference Thus a directory whose name is displayed as JOHN SMITH in the directo
3. Relative to Reference Submenu Use 1 Reference Use 2 Reference Use CBStd Reference Rescale Use 1 Reference selects user defined Reference 1 to compare with the signal being measured Use 2 Reference selects user defined Reference 2 to compare with the signal being measured Use CBStd Reference selects the standard colorbar level for measurement Rescale adjusts the display graticule for the appropriate displayed resolution Acquire Submenu Special Position Block Mode Special Position provides soft keys than let you set the locations on the waveform where measurements are made Block Mode enables Block mode The block starts at the system line VM700T Option 30 Component Measurements User Manual Operating Basics Block Lines nn Block Step nnn Block Lines sets the number of lines to average for the measurement The default number of block lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the last line of the block exceeds the current field Block Step sets the number of lines to step in the block The default number of lines to step is 2 the range is 2 to end of the field Special Position Submenu Auto Scan White nn n psec Yellow nn n psec Blue nn n psec Black nn n psec Measure Cycles n Exit Auto Scan automatically scans and determines measurement locations Deselecting Auto Scan displays soft
4. 49 menu 2 49 Vector Amplitude submenu 10096 2 50 75 2 50 Vector main menu Average Num 2 50 Vector measurement main menu Amplitude 2 50 Rescale 2 50 Video Options soft key 2 1 viewing the window 2 1 Video Options directory 2 1 Video Source file 1 1 configuring 1 7 editing 1 7 specifying 1 9 VM700 prompt 3 2 VM700T commands execute 3 2 get 3 3 getresults 3 3 hardkey 3 4 set 3 4 show 3 5 softkey 3 5 VM700T Option 30 Component Measurements User Manual
5. Figure 1 6 Selecting a file to use as a template To change the Video Source parameters Rotate the knob to highlight the line that contains the parameter you want to change in this case highlight the line Component System Default 2 Touch the desired parameter for example touch Component System De fault A box highlights the selected parameter 3 Rotate the knob to change the parameter or value select the name of the new Video Source file you created 4 Touch the Accept Input soft key to accept the change The highlight box disappears and the new parameter displays 5 Touch the Update amp Exit soft key to save the change and return to the Video Source Files menu NOTE If you change a parameter and don t want to save the change touch the No Change amp Exit soft key The VM 700T asks you to touch the No Change amp Exit soft key again to verify that you want to exit without changing anything For more information about the other selections in the Video Source file see the user manual for your NTSC PAL or dual standard VM 700T Video Measure ment Set VM700T Option 30 Component Measurements User Manual Configuring the Option Configuring the Source Selection Video Files The Video Limit files used by the VM700T for video measurements are configured in the Video Limit Files directory and specified in the Video Source Files directory Likewise the Video Source files are configured in the Video
6. 2 46 VM700T Option 30 Component Measurements User Manual iii Table of Contents List of Tables Figure 2 26 Parade menu tree eeeeee eene 2 47 Figure 2 27 Vector measurement display 2 49 Figure 2 28 Vector menu tree eeeeeeeeeeeeeennnnn 2 49 Table 3 1 VM 700T remote control commands format 3 2 Table 3 2 Front panel button names eene 3 4 Table 3 3 Keywords for get and set NTSC component 3 6 Table 3 4 Keywords for get and set PAL component 3 7 VM700T Option 30 Component Measurements User Manual Preface Contents of This Manual Option 30 Component of the VM700T Video Measurement Set gives you access to the following component measurements m Bowtie measures timing and amplitude differences m Channel Delay measures timing and amplitude differences as does Bowtie but it works with signals containing jitter m ColorBar measures the Y Pb and Pr amplitudes of each chroma packet W K_ Factor measures K 2T K 5T and Pulse to Bar ratio on component input signals m Level Meter monitors peak to peak amplitude of a component signal m Lightning displays two XY graphs on the screen m Luminance NonLinearity measures luminance nonlinear distortion m Component Multiburst measures frequency response W Noise Spectrum measures noise level and performs spectrum analysis m Overlay displays stacked or superimposed Y
7. Block Lines 2 9 Block Mode 2 8 Block Step 2 9 Frequency Set 2 8 VM700T Option 30 Component Measurements User Manual Channel Delay Bowtie Display submenu Exit 2 9 Marker 2 9 Channel Delay Frequency Set submenu Pb Pr 2 9 Set to Default 2 9 Set to Measured 2 9 Y 2 9 Channel Delay main menu Acquire 2 8 Average Num 2 7 Bowtie Display 2 8 Reference 2 7 Relative to Ref 2 7 Rescale 2 8 Channel Delay Reference submenu Show 1 Reference 2 8 Show 2 Reference 2 8 Store 1 Reference 2 8 Store 2 Reference 2 8 Channel Delay Relative to Reference submenu Rescale 2 12 Use 1 Reference 2 8 2 12 Use 2 Reference 2 8 2 12 Use CBStd Reference 2 12 Chroma Amp soft key 2 26 Clamp Couple soft key 2 4 2 25 Clamp Couple submenu Clamp Fast 2 5 2 26 Clamp Slow 2 5 2 26 DC Coupling 2 5 2 26 Clamp Fast soft key 2 5 2 26 Clamp Slow soft key 2 5 2 26 ColorBar measurement 2 10 menu 2 10 ColorBar Acquire submenu Block Lines 2 13 Block Mode 2 12 Block Step 2 13 Special Position 2 12 ColorBar Amplitude submenu 10096 2 13 75 2 13 75 with 100 Flag 2 13 ColorBar main menu Acquire 2 12 Amplitude 2 12 Average Num 2 11 Reference 2 11 Index 1 Index Relative to Reference 2 11 Rescale 2 12 ColorBar Reference submenu Show 1 Reference 2 12 Show 2 Reference 2 12 Store 1 Reference 2 12 Store 2 Reference 2 12 ColorBar Special Po
8. Pb and Pr component inputs m Parade displays side by side Y Pb and Pr component inputs W Vector provides an XY display of the Pb and Pr components The Component soft key is displayed in the Measure mode Video Options directory window when Option 30 is installed in your VM 700T Configuring the Option describes how to configure the Component Measurement option of the VM 700T Video Measurement Set Operating Basics describes the Option 30 component measurements What is measured how to interpret the displays and the menu controls are discussed Remote Commands and Keywords describes the remote commands and lists the keywords that are added to perform the option measurements and get measure ment results for Option 30 Abbreviated instructions for operating the instrument using remote control are also found in this section For complete information about remote control see the VM 700T RS 232 Interface Programmer Manual If you have Option 48 the GPIB interface option installed refer also to the VM700T Option 48 GPIB Interface Programmer Manual for added information on GPIB remote operation VM700T Option 30 Component Measurements User Manual V Configuring the Option NU SSS Configuring the Option This section describes how to configure the Component Measurement option of the VM700T Video Measurement Set Configuring the VM 700T Component Measurement option is similar to using its other video functions A series of files and
9. 1 0 Upper Graticule lets you define the upper graticule of the special graticule Follow the displayed instructions to define the upper graticule Lower Graticule lets you define the lower graticule of the special graticule Follow the displayed instructions to define the lower graticule Set to 0 0 sets the graticule coefficient to 0 0 This soft key is displayed when you touch a graticule coefficient Set to 1 0 sets the graticule coefficient to 1 0 This soft key is displayed when you touch a graticule coefficient Set to 1 0 sets the graticule coefficient to 1 0 This soft key is displayed when you touch a graticule coefficient VM700T Option 30 Component Measurements User Manual Operating Basics LevelMeter Measurement Figure 2 11 shows the typical LevelMeter display monitoring the peak to peak amplitude of a component signal The display shows levels for Y Pb Pr components and Y Sync You can set the measurement for delta between two points in mV delta between two points in percent referenced to a value or absolute between one point and zero ground in either mV or percent The LevelMeter measurement displays indicators large arrows next to the readouts when the input signal exceeds preset limits Arrow direction indicates above limit or below limit readings You can set the LevelMeter upper and lower limits in the current Component measurements ConfigFiles directory Refer to Configuring the Component Measur
10. 3 3 and Table 3 4 The channel letter can be A B or C The configuration values changed with set remain in effect until restored to their original pre remote values with the restoreconfig command or power to the instrument is switched off and back on System line and other global variables can be changed with set but are not restored with restoreconfig Example VM700T gt set ELPW A 1 5 1 5 The above example changes the NTSC lightning peak white amplitude error limits for channel A from their previous values to 1 5 to 1 5 percent VM700T Option 30 Component Measurements User Manual Remote Commands and Keywords show filename The show command returns the contents of the specified filename The default path is the Measurement Results directory but other files can be specified with a full pathname or a path relative to the Measurement Results directory Example VM700T gt show nvram0 ConfigFiles Source Selection Video Video NTSC Video Source File Name PAL Video Source File Name Source A NTSC System Default System Default Source B PAL System Default System Default Source C NTSC System Default System Default Timed Events System Default softkey softkey name The softkey command indicates the touch and release of a specified softkey such as Cursors Sending softkey is equivalent to entering softpress and softrelease however in general softkey should be used instead of these commands Example VM700T gt
11. 8 0 50 0 50 0 6 0 40 0 40 0 4 0 30 0 30 0 2 0 20 0 20 0 0 0 10 0 10 0 2 0 0 0 0 0 4 0 10 0 10 0 6 0 20 0 20 0 8 0 30 0 30 0 10 0 40 0 40 0 12 0 50 0 50 0 14 0 60 0 60 0 16 0 70 0 70 0 18 0 80 0 80 0 20 0 90 0 90 0 22 0 100 0 24 0 Average 32 32 Figure 2 5 Channel delay display showing color difference component delays Pressing the Menu button while the Channel Delay measurement is running displays the Channel Delay main menu The Channel Delay menu tree is shown in Figure 2 6 VM700T Option 30 Component Measurements User Manual Operating Basics Channel Delay Main Menu Reference Submenu Relative to Ref Submenu Acquire Submenu Frequency Set Submenu Bowtie Display Submenu VM700T Option 30 Component Measurements User Manual Average Reference Relative Acquire Bowtie Rescale Num 32 to Ref Display Store 1 Store 2 Show 1 Show 2 Reference Reference Reference Reference Use 1 Use 2 Reference Reference Frequency Block Block Block Set Mode Lines nn Step nn l Setto Setto Y PbPr Default Measured nnnkHz nnn kHz Marker Exit nn n usec 1 Only when Y or Pb Pr are selected Figure 2 6 Channel delay menu tree Channel De
12. Basics In an ideal set of component signals the two vertical lines coincide as do the two horizontal lines Figure 2 2 The greater the separation between the two lines in either pair the greater the timing or amplitude difference in the component signals Figure 2 3 Bowtie F1 L 39 Marker line F1 L164 Centermost of 13 markers 35 42 uSec 4 8 ns Relative Timing 12 4 ns 2 77 mv Relative Amplitude 6 22 mv Figure 2 3 Bowtie display showing waveform with relative timing and amplitude errors A digital readout above each graph indicates the timing difference between the channels and the peak to peak difference between luminance and chrominance at the measured null point Other information shown on the first two lines of the Bowtie display includes the measurement name the field and line number on which the measurement is made and the number of data points averaged and the total number of points to average only appears when averaging is on The third line of the display changes depending on whether or not an artificial reference is in use When an artificial reference is not used this is the case most of the time the VM700T displays the field and line number of the marker line the number of markers found and the location of the centermost marker relative to the leading edge of the sync pulse This number is used as the reference location of the null point When using an artificial reference the VM700T displays th
13. Fast 2 26 Clamp Slow 2 26 DC Coupling 2 26 display explained 2 23 Main menu Average Num 2 25 Chroma Amp 2 26 Clamp Couple 2 25 Determine ColorBars 2 25 Draw Numbers 2 25 Scale 2 25 Standard 2 26 measurement 2 23 measurement running 2 23 menu 2 24 Scale submenu Rescale 2 26 Scale Flat 2 26 Scale Grat 2 26 Scale User 2 26 Limit file deleting 1 6 Luminance NonLinearity measurement 2 27 menu 2 27 Luminance NonLinearity Acquire submenu Block Lines 2 30 Block Mode 2 30 Block Step 2 30 Special Position 2 30 Luminance NonLinearity main menu Acquire 2 29 Average Num 2 28 Reference 2 28 Relative to Reference 2 28 Rescale 2 29 Luminance NonLinearity Reference submenu Show 1 Reference 2 29 Show 2 Reference 2 29 Store 1 Reference 2 29 Store 2 Reference 2 29 Luminance NonLinearity Relative to Reference submenu Use 1 Reference 2 29 Use 2 Reference 2 29 Index 3 Index Luminance NonLinearity Select Y Pb Pr submenus Ist Step 2 31 Last Step 2 31 Manual Steps 2 31 Previous Display 2 31 Luminance NonLinearity Special Position submenu Select Pb 2 31 Select Pr 2 31 Select Y 2 31 Marker Line 2 5 markers explained 2 5 Measure mode 2 1 Measurement Locations file 2 5 measurements Bowtie 2 2 Channel Delay 2 6 ColorBar 2 10 K Factor 2 14 LevelMeter 2 19 Lightning 2 23 Luminance NonLinearity 2 27 Multiburst 2 32 Noise Spectrum 2 38 Over
14. Pb Pr Meas Area Bar Top Ref Pos Pulse Pos Previous nnn nn n usec nn n usec nn n usec Display 1 NTSC only 2 PAL only 3 Only with Special Graticule selected 4 Only with Pb or Pr selected Figure 2 10 K Factor menu tree K Factor Main Menu Average Num nnn Average Num specifies the weighting factor to be used for averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Graticule Graticule presents soft keys to control the graticule gain and tracking of the current graticule and to change from a standard to a user created graticule VM700T Option 30 Component Measurements User Manual 2 15 Operating Basics 2 16 Acquire Rescale Acquire presents soft keys for acquisition control such as block mode acquisition pattern or for determining a measure ment position on the waveform Rescale adjusts the display graticule for the appropriate displayed resolution Graticule Submenu EIA Graticule CMTT 2T Graticule CCIR 2T Graticule Special Graticule Make Graticule Graticule Gain n n Graticule Track Graticule Reset EIA Graticule NTSC only selects the standard EIA graticule using the current values of graticule gain and tracking This is the default NTSC graticule CMTT 2T Gr
15. Submenu Select Y Select Pb Select Pr Select Y displays the data or waveform for source A Select Pb displays the data or waveform for source B Select Pr displays the data or waveform for source C Select Y Pb Pr Submenus Manual Steps n 1st Step nn n psec Last Step nn n psec Previous Display Manual Steps selects the number of luminance steps in the signal You can adjust the number of luminance steps with the knob after touching this soft key 1st Step selects the position of the first luminance step edge of stair case Touch the soft key and turn the knob to select the position of the first luminance step Last Step selects the position of the last luminance step edge of stair case Touch the soft key and turn the knob to select the position of the last luminance step Previous Display leaves the display and returns to the previous display VM700T Option 30 Component Measurements User Manual 2 31 Operating Basics Multiburst Measurement Component MultiBurst measures frequency response The MultiBurst display stacks the three component input signals and plots each signal amplitude in dB as a function of its difference from the reference frequency Figure 2 18 shows the Component Multiburst display Arrows on the display indicate an out of limits condition The measurement limits for Y Pb and Pr multiburst flags and packets in mV and dB respec tively are set to default values You can change the
16. averaging up to 256 and stores Reference current display values as user reference 1 when released Store 2 Store 2 Reference begins averaging up to 256 and stores Reference current display values as user reference 2 when released NOTE You can obtain the best reference by using a large averaging number Show 1 Show 1 Reference displays the date and values of user Reference reference 1 Show 2 Show 2 Reference displays the date and values of user Reference reference 2 Relative to Ref Submenu Use 1 Use 1 Reference selects user defined Reference 1 to Reference compare with the signal being measured Use 2 Use 2 Reference selects user defined Reference 2 to Reference compare with the signal being measured Acquire Submenu Special Special Position provides soft keys than let you set the Position locations on the waveform where measurements are made Block Mode Block Mode enables Block mode The block starts at the system line VM700T Option 30 Component Measurements User Manual 2 21 Operating Basics Block Lines nn Block Step nnn Block Lines sets the number of lines to average for the measurement The default number of block lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the last line of the block exceeds the current field Block Step sets the number of lines to step in the block The default number of lines to step is 2
17. directories provide default parameters that the VM 700T uses to measure video signals Creating User Files If your application requires parameters other than the defaults supplied with the VM700T you can configure the Component Measurement option according to your preferences To configure and use new parameters in Component measure ments you must do the following tasks W Create your own Component Measurement limits file for example NewLimits and configure it with your limits W Create your own Video Source file for example NewSource and select the NewLimits file as the limits file to use m Configure the Source Selection Video file to select the NewSource file as a source file for one or all of the channels A B or C as needed for your measurements The following text describes these steps 1 Press the Configure button to begin configuration of the Component Measurement option The screen displays a memory use indicator informa tion about instrument option versions and four soft keys touch screen buttons as shown in Figure 1 1 VM700T Option 30 Component Measurements User Manual 1 1 Configuring the Option Non volatile memory used 52416 bytes free 995904 bytes used free 5 95 VM700T Video Measurement Set Xxxxxxx Xxxxx Option 01 NTSC Version 2 09 Option 11 PAL Version 2 09 Option 40 Audio Version 1 05 Option 30 Component Version 1 01 Option 20 Teletext Version 1 01 Option 1G Echo Round
18. lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the last line of the block exceeds the current field Block Step Block Step sets the number of lines to step in the block The nnn default number of lines to step is 2 the range is 2 to end of the field Touching the Special Position soft key shows the Special Position display and its soft keys This display shown in Figure 2 20 presents the Y Pb and Pr input signals side by side Touching a soft key displays the Y Pb or Pr waveform by itself on an expanded scale VM 700T Option 30 Component Measurements User Manual 2 35 Operating Basics Measurement Location for Component Multiburst Field 1 Line 50 Y G Pb B Pr R n AM 2 ea ee ee pee css peste eee qp 40 0 20 0 40 0 Figure 2 20 MultiBurst special position display Special Position Submenu Select Y Select Y displays the data or waveform for source A Select Pb Select Pb displays the data or waveform for source B Select Pr Select Pr displays the data or waveform for source C Select Y Pb Pr Submenus Set Set Default resets each location s default numbers unless Default another key is selected Otherwise only the location you select is changed FlagStart FlagStart selects the leading edge location of the MultiBurst Flag FlagWidth FlagWidth selects the width of the MultiBurst Flag Packet n n Packet selects one of the six packets and using
19. on the current line If the signal conforms to a known color bars standard that standard and the estimated chromi nance bar amplitude 75 or 100 become the current standard and amplitude for the measurement VM 700T Option 30 Component Measurements User Manual 2 25 Operating Basics Standard Standard selects a color bar standard to display the graticule and make amplitude and timing measurements When this soft key is highlighted the standard can be selected by rotating the knob Available standards include SMPTE EBU BetaCam and MII Chroma Chroma Amp selects a colorbar chrominance amplitude Amp percentage to use for displaying the graticule and as an amplitude reference for calculating error results When this soft key is highlighted the amplitude percentage can be selected with the knob Available percentages include 75 and 100 Scale Submenu Scale Scale Flat sets the scale at a value that allows for the widest Flat known standard colorbar signal Scale Scale Grat fills the display along the x axis for the colorbar Grat signal currently being received Scale User Scale User adjusts x axis expansion by rotating the knob Rescale Rescale resets the x axis expansion value to that seen when the Scale Method is set to Flat This soft key only appears when the Scale User soft key is highlighted Clamp Couple Submenu Clamp Clamp Slow selects slow clamp speed This speed allows Slow visible hum effects but is useful in copi
20. one of the 0 5 to 4 5 MHz low pass filters in 0 5 MHz increments To change the frequency select and hold the soft key turn the knob to locate the new frequency and release the soft key Previous Previous Display leaves the current display and returns to the Display previous display Cursors Submenu Nearest Nearest Peak positions the active cursor on the nearest peak of Peak the Noise Spectrum display Cursor 1 Cursor 1 On displays noise cursor 1 The cursor appears in the On position it was in the last time the cursor was active Cursor 2 Cursor 2 On displays noise cursor 2 The cursor appears in the On position it was in the last time the cursor was active Cursor 1 Cursor 1 Active enables the knob to move noise cursor 1 Also Active displays the Nearest Peak soft key Cursor 2 Cursor 2 Active enables the knob to move noise cursor 2 Also Active displays the Nearest Peak soft key Acquire Submenu InputGate Block Mode InputGate provides soft keys to control the width and position of the signal area used for the Noise Spectrum measurement Block Mode enables Block mode The block starts at the system line VM700T Option 30 Component Measurements User Manual 2 41 Operating Basics 2 42 Block Lines Block Lines sets the number of lines to average for the nn measurement The default number of block lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the l
21. softkey Select Graph The general rule for forming a softkey name is to take the spelling and capital ization from the soft key soft key is used as a single word name on the display omit the variable part and join the words with _ underscore For example the softkey name for the Noise 15 03 dB soft key is Noise dB and for 1H Display itis H Display For soft keys that perform toggle operations such as on off the soft key name is followed by a colon For example Plot ON or Freq LINEAR The soft key displays the current status of the toggle To name toggle keys use the function name with appropriate capitalization up to but not including the colon Get and Set Command Keywords This section documents the Component measurement keywords used with the get and set commands see Table 3 3 and Table 3 4 For each get set keyword it gives the syntax of the set command and the get result a description of what the keyword does and the upper and lower limits of its range Some keywords return only one value F1 some return two values F1 and F2 and other return three values F1 F2 and F3 For information on working with VM 700T remote control commands see the VM 700T RS 232 Interface Programmer Manual VM700T Option 30 Component Measurements User Manual 3 5 Remote Commands and Keywords Table 3 3 Keywords for get and set NTSC Component EBC1EBC8 Pb CB color 1 mV Pb CB color 48 mV EBHA Pb K Factor Pulse
22. stores Reference current display values as user reference 1 when released Store 2 Store 2 Reference begins averaging up to 256 and stores Reference current display values as user reference 2 when released NOTE You can obtain the best reference by using a large averaging number Show 1 Reference Show 2 Reference Show 1 Reference displays the date and values of user reference 1 Show 2 Reference displays the date and values of user reference 2 Relative to Reference Submenu Use 1 Reference Use 2 Reference 2 34 Use 1 Reference selects user defined Reference 1 to compare with the signal being measured Use 2 Reference selects user defined Reference 2 to compare with the signal being measured VM700T Option 30 Component Measurements User Manual Operating Basics dB Reference Submenu OdB dB Ref selects the position of the 0 dB reference on the dB Ref scale Flag Flag sets the dB scale reference for the percentage of the flag nnn amplitude Rescale Rescale adjusts the display graticule for the appropriate displayed resolution Acquire Submenu Special Special Position provides soft keys than let you set the Position locations on the waveform where measurements are made Block Mode Block Mode enables Block mode The block starts at the system line Block Lines nn Block Lines sets the number of lines to average for the measurement The default number of block
23. the range is 2 to end of the field Special Position Submenu Select Y Select Pb Select Pr Two Wire Mode Select Y displays the data or waveform for source A Select Pb displays the data or waveform for source B Select Pr displays the data or waveform for source C Two Wire Mode measures Pb and Pr on source B Select Y Pb Pr Submenu Sync nn n psec BackPorch nn n psec Pos nn n psec Pos nn n psec Measure Cycles n Previous Display 2 22 Sync lets you use the knob to adjust the center position of the line sync when you press this soft key BackPorch lets you use the knob to adjust the center position of the back porch when you press this soft key Pos lets you use the knob to adjust the center position of the minus peak packet when you press this soft key Pos 4 lets you use the knob to adjust the center position of the plus peak packet when you press this soft key Measure Cycles selects the number of chrominance subcarrier cycles measured in each packet The displayed box shows the measurement area determined by the selected number of cycles Select the soft key and turn the knob to change the number of cycles Previous Display exits the current display and returns to the previous display VM700T Option 30 Component Measurements User Manual Operating Basics Lightning The Lightning measurement measures timing and amplitude differences between the three channels in an an
24. 04 en msn M 0 1 99 8 99 6 P P Pr Figure 2 15 NonLinearity measurement display Luminance Pressing the Menu button while the Luminance NonLinearity measurement is NonLinearity Menu running displays the Luminance NonLinearity main menu The Luminance NonLinearity menu tree is shown in Figure 2 16 VM700T Option 30 Component Measurements User Manual 2 27 Operating Basics NonLinearity Main Menu Reference Submenu Relative to Ref Submenu Acquire Submenu Special Position Submenu Select Y Pb and Pr Submenus 2 28 Average Reference Relative Acquire Rescale Num 32 to Ref Store 1 Store 2 Show 1 Show 2 Reference Reference Reference Reference Use 1 Use 2 Reference Reference Special Block Block Block Position Mode Lines nn Step nn Selec Selec Select Two Wire Y Pb Pr Mode Manual Ist Step Last Step Previous Steps n nn n usec nn n usec Display Figure 2 16 NonLinearity menu tree Luninance NonLinearity Main Menu Average Num nnn Reference Relative To Ref Average Num specifies the weighting factor to be used for averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to
25. 1 F2 float 50 0 50 0 EYKF F1 F2 float 0 0 99 9 EYM1 to EYM9 Y MB Packet 1 dB Y MB Packet 9 dB F1 F2 float 40 0 40 0 EYMB Y Multiburst P ackets F1 integer 3 9 EYMF Y Multiburst Flag mV F1 F2 float 0 0 999 9 EYNL Y Non Linearity F1 F2 float 0 0 50 0 EYNO Y Noise Level dB rms F1 F2 float 100 0 oo VM700T Option 30 Component Measurements User Manual EYSA FLF2F3 f 999 9 Table 3 4 Keywords for get and set PAL Component FBC1 to FBC8 FL F2 float 500 0 500 0 FBKB FLF2 float 50 0 50 0 FBKF f 99 9 FBMB integer 9 FBMF fat 999 9 FBNL 50 0 FBNO 00 FBPP F1 F2 F3 999 9 FBRD F1 F2 FS 400 0 FBWL F1 integer 1 625 FBWT float 100 0 100 0 FBYD F1 F2 F3 float 400 0 400 0 FCSD Colourbar standard Fl GBR YPbPrSMPTE EBU FLCP Lightning color pk pk ampl error F1 F2 float 10 00 10 00 FLPW Lightning pk white ampl error F1 F2 float 10 00 10 00 Remote Commands and Keywords Table 3 4 Keywords for get and set PAL Component cont FMKL Fl integer 1 625 FPRI Fl no yes FRCL to FRCE 500 0 FRCI FL no yes FRHA PrK Factor Pulse HAD F1 integer 2 8 FRKB Pr K PB Factor Fl F2 float 0 0 50 0 FRKF Pr K Factor 96 F1 F2 float 0 0 99 9 FRM1 to FRM9 att Packet 1 dB to Pr MB Packet 9 F1 F2 float 40 0 40 0 FRMB Pr Multiburst Packets F1 integer 3 9 FRMF Pr Multiburst Flag mV F1 F2 float 0 0 999 9 FRNL Pr Non Lin
26. 30 Component Measurements User Manual Operating Basics Main Menu Average Num Scale Clamp Couple Average Num specifies the weighting factor to use for averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value touch the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then touch the Average Num soft key again Scale displays the Scale submenu which selects the method of determining the x axis expansion value Clamp Couple displays the Clamp Couple submenu This menu lets you set the Clamping mode used by the Lightning measurement Lightning Average Main Menu Num 32 Scale Scale Submenu Flat Clamp Couple Clamp Submenu 5 ow Scale Clamp Draw Determine Standard Chroma Couple Numbers ColorBars Unknown Amp 10096 Scale Scale Grat User Clamp DC Fast Coupling Figure 2 14 Lightning menu tree Draw Numbers Determine ColorBars Draw Numbers displays amplitude values in millivolts for each of the six color bars on each of the three channels along with the percentage deviation from the reference value The numbers are linked to the display by lines that indicate the measured amplitude location Determine ColorBars attempts to determine the color bars standard and the chrominance amplitude of the input color bars signal
27. Cursor 2 On 2 41 Nearest Peak 2 41 VM700T Option 30 Component Measurements User Manual Index Noise Spectrum Filters Selection submenu Chroma Weighting 2 41 FSC Trap Filter 2 41 High Pass 100 kHz 2 40 High Pass 200 kHz 2 40 Low Pass 2 41 Low Pass 4 2 MHz 2 40 Low Pass 5 0 MHz 2 41 NTC 7 Weighting 2 41 Previous Display 2 41 Unified Weighting 2 41 Noise Spectrum InputGate submenu Area Pos 2 42 AreaWidth 2 42 Exit 2 42 Normal 2 42 Noise Spectrum main menu Acquire 2 40 Average Num 2 40 Cursors 2 40 Rescale 2 40 Tilt Null 2 40 Y Pb Pr Select 2 40 Noise Spectrum Select submenu Filters Selection 2 40 Select Pb 2 40 Select Pr 2 40 Select Y 2 40 O Overlay measurement 2 43 menu 2 43 Overlay Cursors submenu Cursor1 2 45 Cursor2 2 45 Cursors On 2 45 Cursors to Midscreen 2 45 Overlay Display submenu Overlay Channels 2 45 Stack Channels 2 45 Waveform A 2 44 Waveform B 2 44 Waveform C 2 44 Overlay main menu Average Num 2 44 Cursors 2 44 Display 2 44 Rescale 2 44 VM700T Option 30 Component Measurements User Manual P Parade measurement 2 46 menu 2 46 Parade Cursors submenu Cursors On 2 47 Cursors1 2 48 Set to 100 Std 2 47 Set to 7596 Std 2 47 Set to nnn mV 2 48 Parade Display submenu Aligned 2 48 Offset 2 48 Parade main menu Average Num 2 47 Cursors 2 47 Display 2 47 Rescale 2 47 Parameters changing the Vid
28. HAD EBKB Pb K PB Factor EBKF EBM1 to EBM9 EBMB integer EBMF Pb Multiburst Flag mV F1 F2 float 0 0 999 9 EBNL Pb Non Linearity Fl F2 float 0 0 50 0 EBNO Pb Noise Level dB rms Fl F2 float 100 0 0 0 EBPP Pb P P Amplitude mV 3 values FL F2 F3 float 0 0 999 9 EBRD Pb to Pr Delay nsec 3 values F1 F2 F3 float 400 0 400 0 EBWL Bowtie field and line F1 F2 integer 12 10 262 EBWT Bowtie interchannel delay ns F1 F2 float 100 0 100 0 EBYD Pb to Y Delay nsec 3 values F1 F2 F3 float 400 0 400 0 ECSD Colorbar standard Fl GBR 700 system default GBR 700 Setup GBR 714 GBR 714 Setup YPbPrSMPTE EBU YPbPr 714 Betacam Setup YPbPr 714 Betacam YPbPr 700 MII Setup ELCP FLF2 float 10 00 10 00 ELPW F1 F2 float 10 00 10 00 EMKL 10 262 EPRI yes ERCI yes ERHA integer 8 ERKB 50 0 ERKF 99 9 ERMI to ERM9 40 0 ERMB 9 ERMF 999 9 ERNL FL F2 float 0 0 50 0 ERNO Pr Noise Level dB rms Fl F2 float 100 0 0 ERPP Pr P P Amplitude mV 3 values F1 F2 F3 float 0 0 999 9 ERYD Pr to Y Delay nsec 3 values F1 F2 F3 float 400 0 400 0 3 6 VM700T Option 30 Component Measurements User Manual Remote Commands and Keywords Table 3 3 Keywords for get and set NTSC Component cont ETNM Fl integer 50 150 EYC1 to EYC8 Y CB color 1 mV Y CB color 8 mV F1 F2 float 500 0 500 0 EYHA 8 EYKB F
29. Reference selects user defined Reference 1 to Reference compare with the signal being measured Use 2 Use 2 Reference selects user defined Reference 2 to Reference compare with the signal being measured Touching the Special Position soft key shows the Special Position display see Figure 2 17 where you can specify locations on the waveform for measure ments VM 700T Option 30 Component Measurements User Manual 2 29 Operating Basics Location for the Luma NonLinearity Component Field 1 Line 50 p Y G 20 0 40 0 n Jif u sec 20 0 40 0 Pr R 20 0 40 0 Select Y Select Pb Select Pr Figure 2 17 Luminance NonLinearity special position display Acquire Submenu Special Position Block Mode Block Lines nn Block Step nnn 2 30 Special Position provides soft keys than let you set the locations on the waveform where measurements are made Block Mode enables Block mode The block starts at the system line Block Lines sets the number of lines to average for the measurement The default number of block lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the last line of the block exceeds the current field Block Step sets the number of lines to step in the block The default number of lines to step is 2 the range is 2 to end of the field VM700T Option 30 Component Measurements User Manual Operating Basics Special Position
30. Source Files directory and specified in the Source Selection Video directory You can select a Video Source file from the Source Selection Video if you intend to use a source file other than the system default for each of three sources Specifying a Video To specify a Video Source file Source File NETS Rotate the front panel knob until Source Selection Video displays 2 Touch the Source Selection Video 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 Accept Input soft key The highlight box disappears and the new source displays 7 Touch the Update amp Exit soft key if the change is correct The ConfigFiles menu displays If the change is not correct touch the No Change amp Exit soft key NOTE If you change the Video Source file and do not want to save the change touch the Accept Input soft key then touch the No Change amp Exit soft key The VM 700T asks you to touch the No Change amp Exit soft key again to verify that you want to exit the Source Selection Video directory and cancel any changes VM700T Option 30 Component Measurements User Manual 1 9 E Operating Basics C Operating Basics This se
31. T Graticule PAL only 2 16 CMTT 2T Graticule NTSC only 2 16 EIA Graticule 2 16 Graticule Gain 2 16 Graticule Reset 2 16 Make Graticule 2 16 Special Graticule 2 16 K Factor main menu Acquire 2 16 VM700T Option 30 Component Measurements User Manual Index Average Num 2 15 Graticule 2 15 Rescale 2 16 K Factor Select Y Pb Pr submenu Bar Top 2 17 Meas Area 2 17 Previous Display 2 17 Pulse Pos 2 17 Ref Pos 2 17 K Factor Special Position submenu Select Pb 2 17 Select Pr 2 17 Select Y 2 17 keyboard Setl 1 4 Set2 1 4 keywords get command 3 5 set command 3 5 L Leave Directory soft key 1 6 LevelMeter measurement 2 19 menu 2 19 LevelMeter Acquire submenu Block Lines 2 22 Block Mode 2 21 Block Step 2 22 Special Position 2 21 LevelMeter main menu Acquire 221 Average Num 2 20 Reference 2 20 Relative to Reference 2 21 Rescale 2 21 LevelMeter Reference submenu Show 1 Reference 2 21 Show 2 Reference 2 21 Store 1 Reference 2 21 Store 2 Reference 2 21 LevelMeter Relative to Ref submenu Use 1 Reference 2 21 Use 2 Reference 2 21 LevelMeter Select Y Pb or Pr submenu BackPorch 2 22 Measure Cycles 2 22 Pos 2 22 Pos 2 22 Previous Display 2 22 Sync 2 22 VM700T Option 30 Component Measurements User Manual LevelMeter Special Position submenu Select Pb 2 22 Select Pr 2 22 Select Y 2 22 Two Wire Mode 2 22 Lightning Clamp Couple submenu Clamp
32. Test Equipment Depot User Manual 1 800 517 8431 Tektronix 7 VM700T Video Measurement Set Option 30 Component Measurements 070 9654 01 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com B Table of Contents Preface d hex Sa OSE Ble Crewe as OE Ra UE du s es v Configuring the Option Creating User Files 2 28 Aer ESO Eee ers Ae s 1 1 Configuring the Component Measurement Limit File 1 3 Create a Component Measurement Limit File 1 3 Editing a Component Measurement Limit Text Parameter 1 6 Deleting a Component Measurement Limit File 1 6 Configuring the Video Source Files 1 7 Editing the Video Source File 2 2 00 eee ee 1 7 Changing the Video Source Parameters 2 0 00 eee eee eee ee 1 8 Configuring the Source Selection Video Files slssleeeeeeees 1 9 Specifying a Video Source File 00 cece eee ee 1 9 Operating Basics Measure Mode Menu Operation 00 e cee cece eee eee eee 2 1 BoWwte ox REESE a ee 2 2 Bowtie Display 435 se ERR LR RAO Ea t os dps 2 2 Bowtie Menus su cos ate Etc Lc Ec ds 2 4 Markers and Artificial References 00 0 cece eee eee eee 2 5 Channel Delay 0 cece mee 2 6 Channel Delay Menu Ra ERE E RON EU eee 2 6 ColorB r 2 vente nie Ee EC LR soe te he ic 2 10 ColorBar Menu
33. Y Sync BackPorch Pos Pos Measure Previous Submenu nn nysec nn n usec nn n usec nn n usec Cycles n Display l Select Pb and Pr Pos Pos Measure Previous Submenus nn n usec nn n usec Cycles n Display Figure 2 12 LevelMeter menu tree LevelMeter Main Menu Average Average Num specifies the weighting factor to be used for Num nnn averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Reference Reference displays the Reference submenu that lets you store the current display as user reference 1 or user reference 2 or show what is currently stored as user reference 1 or user reference 2 2 20 VM700T Option 30 Component Measurements User Manual Operating Basics Relative Relative To Ref displays the Relative to Reference submenu To Ref This menu lets you subtract either of two stored reference values from the signal being measured The displayed result is the difference between the measured signal and the reference value selected Acquire Acquire displays the Acquire submenu with soft keys for frequency and block acquisition control Rescale Rescale adjusts the display graticule for the appropriate displayed resolution Reference Submenu Store 1 Store 1 Reference begins
34. alog component system using a standard colorbar signal To set up the VM700T to run the Lightning measurement connect the signals as follows m Luminance Y output signal to Channel A m B Y signal to Channel B m R Y signal to Channel C Make sure that the incoming signal is a colorbar Lightning Display The Lightning display can be thought of as two XY displays that share the same screen Figure 2 13 shows a typical Lightning display It consists of a single graph divided into two halves The upper half plots the B Y component along the x axis and the Y luminance component along the y axis The lower half plots the R Y component along the x axis and inverted Y an inverted luminance component along the y axis This increases luminance plots upward in the upper half of the screen and downward in the lower half A small rectangle in the center of the screen represents the blanking level or zero signal A series of graticule boxes define the expected values for yellow cyan green magenta red and blue color bars The position of the boxes on the screen varies with the color bar standard used Color bar signals with correct Y B Y and R Y amplitude levels and relative timing display a series of dots that cluster in each of the graticule boxes The line of dots forming the transition between the graticule boxes may be straight or may exhibit a slightly curved S shape depending on the relative bandwidth of the luminance and color d
35. ast line of the block exceeds the current field Block Step Block Step sets the number of lines to step in the block The nnn default number of lines to step is 2 the range is 2 to end of the field InputGate Submenu Normal Normal restores the Area Width and Area Position soft keys to their default values Area Width Area Width controls the width of the signal area used for the nn n psec Noise Spectrum measurement Note low frequency characteris tics and frequency resolution can be changed depending on the area width selected Area Pos Area Pos controls the position of the signal area used for the nn n psec Noise Spectrum measurement Exit Exit leaves the InputGate menu and returns to the Noise Spectrum display VM700T Option 30 Component Measurements User Manual Operating Basics Overlay Measurement Overlay Menu The Overlay measurement displays component Y Pb and Pr inputs in superim posed or stacked format user selectable The display plots signal level in mV against time in usec This measurement provides two cursors for locating waveform features a selection that aligns or offsets the superimposed signals and the ability to isolate any one of the three inputs for individual display Figure 2 23 shows the Overlay measurement display Overlay Field 1 Line 50 Synchronous mV Y A 0 5 10 15 20 25 30 35 40 45 50 55 60 Average Off MicroSeconds Figure 2 23 Overlay measurement display Overlay Chann
36. aticule NTSC only selects the standard CMTT CCIR graticule using the current graticule gain and tracking values CCIR 2T Graticule PAL only selects the standard CCIR graticule using the current graticule gain and tracking values this is the default graticule Special Graticule selects the special user defined graticule Make Graticule only with Special Graticule selected provides soft keys to define the upper and lower graticules of the special graticule Graticule Gain enables Graticule Variable Gain mode Turn the knob to adjust the gain within the 0 1 to 20 0 range Resolution is 0 1 and the default gain is 5 0 Graticule Track enables graticule tracking mode When graticule tracking is enabled the size of the graticule tracks the actual waveform Graticule Reset disables graticule tracking mode and resets the graticule gain to 5 0 Acquire Submenu Special Position Block Mode Special Position provides soft keys than let you set the locations on the waveform where measurements are made Block Mode enables Block mode The block starts at the system line VM700T Option 30 Component Measurements User Manual Operating Basics Block Lines nn Block Step nnn Block Lines sets the number of lines to average for the measurement The default number of block lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the last line of the block excee
37. ction describes the Option 30 component measurement What is measured how to interpret the displays and the menu controls are discussed Measure Mode Menu Operation You can use Measure mode to make interactive measurements of NTSC and PAL signal properties and to access the measurements of any installed options as shown 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 In nvram0 Executable Files Video Options Audio Video Camera Testing Component Timing Echo_Rounding Teletext i i i Video Previous Leave TUE Audio Diags Options Selection Directory Figure 2 1 Measure mode menu choices NOTE In the first Measure mode menu display the Video soft key is visible when Video Options are selected and the Video Options soft key is visible when Video is selected The Audio soft key is seen only if Audio Options are installed Press the Measure button on the front panel to view the Video Options directory window If the VM700T was in the Video Options directory when you last used Measure mode the Video Options directory displays Otherwise touch the Video Options soft key at the bottom of the display to view the Video Options directory Touch the Component soft key to displa
38. ds the current field Block Step sets the number of lines to step in the block The default number of lines to step is 2 the range is 2 to end of the field Special Position Submenu Select Y Select Pb Select Pr Select Y displays the data or waveform for source A Select Pb displays the data or waveform for source B Select Pr displays the data or waveform for source C Select Y Pb Pr Submenus Meas Area nnn 96 Bar Top nn n 96 Ref Pos nn n psec Pulse Pos nn n psec Previous Display Select Pr displays the data or waveform for source C Bar Top selects the bar level measurement location in the signal Press the soft key and turn the knob to select the bar level measurement location Ref Pos selects the bar level reference location in the signal Press the soft key and turn the knob to select the bar level reference location You can set the reference level to the base of the pulse by turning the knob fully CCW Pulse Pos displays the pulse position cursor which you can adjust by turning the knob You must adjust the cursor only for an approximate center location the VM700T firmware locates the cursor to the exact center of the pulse Previous Display exits the current display and returns to the previous display VM700T Option 30 Component Measurements User Manual 2 17 Operating Basics 2 18 Make Graticule Submenu Upper Graticule Lower Graticule Set to 0 0 Set to 1 0 Set to
39. e display and adjust the channel vertical attributes separately or together Rescale Rescale adjusts the display graticule for an appropriate displayed resolution Cursors Submenu Cursors On Cursors On displays the cursors Set to 75 Set to 75 Std places Cursor 1 on the lowest and Cursor 2 on Std the highest amplitude of the 75 colorbar in the currently defined standard for all three channels Set to 10096 Set to 100 Std places Cursor 1 on the lowest and Cursor 2 Std on the highest amplitude of the 100 colorbar in the currently defined standard for all three channels VM700T Option 30 Component Measurements User Manual 2 47 Operating Basics 2 48 Set to Set to nnn mV moves the selected cursor to the amplitude nnn mV specified by the soft key To change the preset amplitude select and hold the soft key to be changed turn the knob until the new amplitude is displayed and release the soft key Cursor Cursor1 assigns knob turns to cursor 1 adjustments Touch the display to select the channel that cursors are active on Cursor2 Cursor2 assigns knob turns to cursor 2 adjustments Touch the display to select the channel that cursors are active on Display Submenu Aligned Aligned aligns and locks together the vertical displays for the three waveforms Turning the knob moves or expands the vertical scale for the display Offset Offset permit you to offset Pb and Pr from the Y display by as much as 350 mV Turning the k
40. e time at which the artificial reference point is set Refer to Markers and Artificial References on page 2 5 for more information VM700T Option 30 Component Measurements User Manual 2 3 Operating Basics 2 4 Bowtie Menu Bowtie Main Menu Artif Reference Submenu Clamp Couple Submenu Pressing the Menu button when the Bowtie measurement runs displays the Bowtie main menu The Bowtie menu tree is shown in Figure 2 4 Average Artif Clamp Num 32 Reference Couple Artif R ef Use Store 35 5 us Artif Ref Artif R ef Clamp Clamp DC Slow Fast Coupling Figure 2 4 Bowtie menu tree Main Menu Average Num Artif Reference Clamp Couple Average Num specifies the weighting factor to use for averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value touch the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then touch the Average Num soft key again Artif Reference displays the Artif Ref submenu which changes and engages an artificial reference or null point Clamp Couple displays the Clamp Couple submenu which sets the Clamping mode used by the Bowtie measurement VM700T Option 30 Component Measurements User Manual Operating Basics Artif Ref Submenu Artif Ref Artif Ref specifies a time from leading edge of sync to use as the expected locatio
41. earity F1 F2 float 0 0 50 0 FRNO Pr Noise Level dB rms Fl F2 float 100 0 0 FRPP FLF2 F3 float 0 0 999 9 FRYD F1 F2 F3 float 400 0 400 0 FTNM F1 integer 50 150 FYC1to FYC8 Y CB color 1 mV to Y CB color 8 mV f 500 0 FYM1 to FYM9 FYMB FYMF FYNL FYNO FYPA FYSA 3 8 Y MB Packet 1 dB to Y MB Packet 9 dB Y Multiburst Packets Y Multiburst Flag mV f Y Non Linearity 96 F1 F2 float 0 0 50 0 Y Noise Level dB rms F1 F2 Y Peak Amplitude mV 3 values F1 F2 F3 Y Sync Amplitude mV 3 values Fl F2 F3 100 0 500 0 100 0 9 999 9 0 0 2000 0 999 9 VM700T Option 30 Component Measurements User Manual Index Index A Accept Input soft key 1 6 1 9 Artif Ref soft key 2 4 2 5 Artif Ref Submenu Artif Ref 2 5 Store Artif Ref 2 5 Use Artif Ref 2 5 artificial references explained 2 5 Auto mode 2 1 Average Num soft key 2 4 2 25 Bowtie Artif Ref submenu Artif Reference 2 5 Store Artif Reference 2 5 Use Artif Reference 2 5 Clamp Couple submenu Clamp Fast 2 5 Clamp Slow 2 5 DC Coupling 2 5 display explained 2 2 Main menu Artif Ref 2 4 Average Num 2 4 Clamp Couple 2 4 measurement 2 2 menu 2 4 buttons Configure 1 1 3 4 Function 3 4 Measure 3 4 Menu 2 4 names front panel 3 4 C Cancel soft key 1 6 cancelling a change 1 5 Channel Delay measurement 2 6 menu 2 6 Channel Delay Acquire submenu
42. ed to specific voltage features on the display see Figure 2 25 Parade SMPTE EBU Field 1 Line 50 Synchronous mv Y A mv Pb B mv Pr C I 700 700 ig i 600 60 50 40 30 20 vomepeemrmqpenmm pee ym Average Off Figure 2 25 Parade measurement display Pressing the Menu button while the Parade measurement is running displays the Parade measurement main menu The Parade measurement menu tree is shown in Figure 2 26 VM700T Option 30 Component Measurements User Manual Operating Basics Parade Average Main Menu 32 Cursors Display Rescale Cursors Cursors Submenu _ 0n 75 Std 100 Std nnn mV Setto Setto Cursor 1 Cursor 2 Display Aligned Submenu 1 Only with cursors on 2 Only with either cursor active Figure 2 26 Parade menu tree Parade Main Menu Average Average Num specifies the weighting factor to be used for Num nnn averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Cursors Cursors presents soft keys that let you adjust horizontal cursors to make timing measurements Display Display presents soft keys that let you reorganize th
43. els mode Pressing the Menu button while the Overlay measurement is running displays the Overlay measurement main menu The Overlay measurement menu tree is shown in Figure 2 24 VM 700T Option 30 Component Measurements User Manual 2 43 Operating Basics 2 44 Overlay Main Menu Cursors Submenu Display Submenu Average Cursors Display Rescale Num 32 Cursors Cursors to Cursor 1 Cursor 2 On Midscreen 2 Waveform Waveform Waveform Aligned 2 Offset Stack Overlay A B C Channels Channels 1 Only when either cursor is on 2 Only when Overlay Channels is selected Figure 2 24 Overlay menu tree Overlay Main Menu Average Average Num specifies the weighting factor to be used for Num nnn averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Cursors Cursors presents soft keys that let you adjust horizontal cursors for timing measurements Display Display presents soft keys that let you reorganize the display and adjust channel vertical attributes separately or together Rescale Rescale adjusts the display graticule for an appropriate display resolution Display Submenu Wave
44. ement Limit File on page 1 3 for more information Component LevelMeter Field 1 Line 50 Sync A mV Y A mv Pb B mV Pr C mv 301 5f 701 9 702 2 699 3 E 770 0 i E 320 770 0 760 0 760 315 760 0 750 0 750 310 13993 740 0 740 740 0 730 305 730 0 730 0 720 0 720 300 Berar g 710 0 710 295 710 0 700 0 700 290 700 0 690 0 690 285 690 0 680 0 680 680 0 280 670 0 670 670 0 660 275 P 660 0 Ed 650 0 650 650 0 640 0 640 265 0 640 0 630 Average 32 gt 32 Figure 2 11 LevelMeter measurement display LevelMeter Menu Pressing the Menu button while the LevelMeter measurement is running displays the LevelMeter main menu The LevelMeter menu tree is shown in Figure 2 12 VM 700T Option 30 Component Measurements User Manual 2 19 Operating Basics LevelMeter Average Reference Relative Acquire Rescale Main Menu Num 32 to Ref Reference Store 1 Store 2 Show 1 Show 2 Submenu Reference Reference Reference Reference Relative to Ref Use 1 Use 2 Submenu Reference Reference Acquire Special Block Block Block Submenu Position Mode Lines nn Step nn Special Position Selec Selec Select Two Wire Submenu Y Pb Pr Mode Select
45. eo Source file 1 8 Component Measurement Limits 1 6 prompt VM 700 3 2 R remote control capabilities 3 1 remote control command format 3 2 Rescale soft key 2 26 S Scale soft key 2 25 Scale submenu Rescale 2 26 Scale Flat 2 26 Scale Grat 2 26 Scale User 2 26 Scale User soft key 2 26 set VM 700T Command 3 4 set command keywords 3 5 show VM700T Command 3 5 soft keys Accept Input 1 6 1 9 Artif Ref 2 5 Artif Reference 2 4 Average Num 2 4 2 25 Cancel 1 6 Chroma Amp 2 26 Index 5 Index Clamp Couple 2 4 2 25 Clamp Fast 2 5 2 26 Clamp Slow 2 5 2 26 Component 1 3 2 1 Configure Files 1 2 Create File 1 7 DC Coupling 2 5 2 26 Delete 1 6 Determine ColorBars 2 25 Done 1 5 Draw Numbers 2 25 Leave Directory 1 6 No Change amp Exit 1 6 Rescale 2 26 Scale 2 25 Scale Flat 2 26 Scale Grat 2 26 Scale User 2 26 Source Selection Video 1 9 Standard 2 26 Store Artif Ref 2 5 System Default 1 3 Update amp Exit 1 6 1 9 Use Artif Ref 2 5 Video Options 2 1 softkey VM 700T Command 3 5 Source Selection Video configuring 1 9 file 1 1 soft key 1 9 specifying Video Source file 1 9 Standard soft key 2 26 Store Artif Ref soft key 2 5 System Default soft key 1 3 T template existing file used as 1 3 Index 6 U Update amp Exit soft key 1 6 1 9 Use Artif Ref soft key 2 5 user files 1 1 V Vector measurement 2
46. f the centermost marker as the expected position for the null point When an artificial reference is used the VM700T uses a user specified value displayed in the Artif Ref box of the Artif Reference submenu as the expected position for the null point Setting an artificial reference point can be useful to compensate for long cable delays or other unavoidable factors that could affect the relative timing of component signals In either case all Bowtie numerical measurements are given relative to the expected null position VM700T Option 30 Component Measurements User Manual 2 5 Operating Basics Channel Delay 2 6 Channel Delay Menu This application make measurements similar to Bowtie and uses the same input signal Its bar level displays work well in manufacturing environments for at a glance comparisons see Figure 2 5 Unlike the Bowtie measurement Channel Delay can work with signals containing jitter You can also make delay measurements at frequencies other than the standard 500 kHz for Y and 502 kHz for Pb and Pr channels For example Bowtie performs measurements only at 500 kHz in the Y and 502 kHz in the Pb and Pr channels With its Frequency Set submenu the Channel Delay measurement lets you set the signal measurement frequency Component Channel Delay Field 1 Line 50 Pb to Y n sec Pr to Y n sec Pb to Pr n sec 2 8 6 0 8 8 E 100 0 90 07 90 0 14 0 80 0 80 0 12 0 70 0 70 0 10 0 60 0 60 0
47. form A Waveform A displays the waveform on channel A when you touch the soft key WaveformB Waveform B displays the waveform on channel B when you touch the soft key WaveformC Waveform C displays the waveform on channel C when you touch the soft key Aligned Aligned aligns and locks together the vertical displays for the three waveforms Turning the knob moves or expands the vertical scale for the display VM700T Option 30 Component Measurements User Manual Operating Basics Offset Offset permits offsetting Pb and Pr from the Y display by 350 mV Turning the knob moves or expands the vertical scale for the display Stack Stack Channels stacks channel input displays one above the Channels other Overlay Overlay Channels superimposes channel input displays one on Channels top of the other Cursors Submenu Cursors Cursors On displays the cursors On Cursors to Cursors to Midscreen moves the selected cursor to midscreen Midscreen Cursor Cursor1 enables knob turns to adjust Cursor 1 Cursor2 Cursor2 enables knob turns to adjust Cursor 2 VM 700T Option 30 Component Measurements User Manual 2 45 Operating Basics Parade Measurement Parade Menu 2 46 The Parade measurement displays component Y Pb and Pr inputs side by side on the VM700T screen The Parade display plots signal level in mV against time in usec This measurement provides two cursors for locating waveform features and the cursors can be position
48. gWidth Packet Center Width 1 Previous Default nn Display 1 Only when Packetis selected Figure 2 19 Multiburst menu tree Multiburst Main Menu Average Num nnn Average Num specifies the weighting factor to be used for averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Reference Reference presents the Reference submenu This menu lets you store the current display as user reference 1 or user reference 2 or show what is currently stored as user reference 1 or user reference 2 VM700T Option 30 Component Measurements User Manual 2 33 Operating Basics Relative Relative To Ref displays the Relative to Reference submenu To Ref which lets you subtract either of two stored reference values from the signal being measured The displayed result is the difference between the measured signal and the reference value selected dB dB Reference select the position of the dB scale reference Reference Acquire Acquire presents the Acquire submenu with soft keys for frequency and block acquisition control Rescale Rescale adjusts the display graticule for the appropriate displayed resolution Reference Submenu Store 1 Store 1 Reference begins averaging up to 256 and
49. highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Reference displays the Reference submenu This menu lets you store the current display as user reference 1 or user reference 2 or show what is currently stored as user reference 1 or user reference 2 Relative To Ref displays the Relative to Reference submenu which lets you subtract either of two stored reference values from the signal being measured The displayed result is the difference between the measured signal and the reference value selected VM700T Option 30 Component Measurements User Manual Operating Basics Acquire Acquire presents the Acquire submenu with soft keys for frequency and block acquisition control Rescale Rescale adjusts the display graticule for the appropriate displayed resolution Reference Submenu Store 1 Store 1 Reference begins averaging up to 256 and stores Reference current display values as user reference 1 when released Store 2 Store 2 Reference begins averaging up to 256 and stores Reference current display values as user reference 2 when released NOTE You can obtain the best reference by using a large averaging number Show 1 Show 1 Reference displays the date and values of user Reference reference 1 Show 2 Show 2 Reference displays the date and values of user Reference reference 2 Relative to Reference Submenu Use 1 Use 1
50. ie interchannel delay in ns for channel A getresults The getresults command stores Measure or Auto mode measurement results in default files in the Measurement Results directory In Measure mode entering getresults with no argument s stores measurement results for the current measurement If the system is not taking a measurement the message Request not supported displays If the system is making a measurement the message Results in file filename displays Use the show filename command to view the results Example VM700T gt getresults Results in file Lightning VM700T Option 30 Component Measurements User Manual 3 3 Remote Commands and Keywords hardkey button_name set keyword channel letter value1 value2 3 4 The hardkey command indicates the press and release of the specified front panel button button_name Using the hardkey command is equivalent to entering hardpress and hardrelease however in general hardkey should be used instead of these commands Example VM700T gt hardkey Menu Front panel button names are listed in Table 3 2 Table 3 2 Front panel button names Display Picture Freeze SelectLine Vector Waveform XY Arrow selector MoveExpand NOTE The Configure Function and Measure buttons cannot be selected from remote The set command defines configuration values to use during the remote session The keywords available for use with set are listed in Table
51. ifference channels Regardless of the transition shape it passes through the midpoint of an imaginary straight line between each pair of graticule boxes Amplitude errors result in a displacement of each cluster of dots outside the graticule boxes Displacement along the vertical axis indicates luminance amplitude error displacement along the horizontal axis indicates B Y or R Y amplitude error Relative timing differences between the Y and B Y or R Y signals are indicated by a pronounced bowing of the line of dots that make up the transition between boxes VM700T Option 30 Component Measurements User Manual 2 23 Operating Basics 2 24 Lightning Colorbars 75 MII 60Hz Pk to Pk 485 6 mv Fl L 44 Pk white 100 700 0 mV Setup 7 5 Color I 4 YL Sot i I Gores c E R p cm E Brees G ie c LOC y1 7 Color Pk to Pk B Y 484 91 mv 0 15 R Y 484 87 mv Pk white 698 69 mv 100 0 19 Delay B Figure 2 13 Lightning display 0 16 2 ns R Y 1 ns Additional information shown on the Lightning display includes the name of the selected measurement the field number and line measured the color bar standard and chrominance amplitude percentage 7596 or 10096 and other information that determines the colorbar type Lightning Menu Pressing the Menu button while the Lightning measurement is running displays the Lightning main menu The Lightning menu tree is shown in Figure 2 14 VM700T Option
52. ing Version 1 00 Option 21 Camera Testing Version 1 02 Configure Function Option Time Files Keys Key Figure 1 1 The Configure menu 2 Touch the Configure Files soft key to begin configuration The screen displays a series of options in a window as shown in Figure 1 2 Scroll the window to view all the menu choices by turning the front panel knob The following topic describes how to configure the VM 700T Component Measurement option Audio Limit Audio Source Audio Source Files Files Identification Auto Limit Camera Communi cation Files Testing Setup C Diagnostics Diagnostic omponent Selection Errors Measure Limit Measurement Echo Rounding 3 c Files Locations m NTSC Files In nvram ConfigFiles Switch Print Leave NTSC PAL File Directory Figure 1 2 Configure menus options 1 2 VM700T Option 30 Component Measurements User Manual Configuring the Option Configuring the Component Measurement Limit File Touch the Component soft key to enter the Component Measurement limit file directory 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 the parameters in any file but parameters of the sy
53. ing the Component Measurement Limit File on page 1 3 for more information K Factor Component Field 1 Line 50 K 2T Y K 5T Pb Inv K 5T Pr Inv 0 7 0 1 0 1 K PB 0 0 KF K PB 0 1 KF K PB 0 1 KF HAD 199 9 n sec HAD 499 3 n sec HAD 499 7 n sec PN we M NM Gb EP dd Pulse Bar Pos 22 9 36 9 Y 34 0 25 1 Pb 33 9 25 1 Pr u sec Average 32 32 Figure 2 9 K Factor component measurement display K Factor Menu Pressing the Menu button while the K Factor measurement is running displays the K Factor main menu The K Factor menu tree is shown in Figure 2 10 2 14 VM700T Option 30 Component Measurements User Manual Operating Basics K Factor Main Menu Graticule Submenu Make Graticule Submenu Acquire Submenu Special Position Submenu Select Y Pb and Pr Submenus Average Graticule Acquire Rescale Num 32 EIA CMTT 2T CCIR 2T Graticule Graticule Graticule 2 Special Make Graticule Graticule Graticule Graticule Graticule 3 Gain n n Track Reset Upper Lower Setto Setto Setto Graticule Graticule 0 04 1 04 1 04 Special Block Block Block Position Mode Lines nn Step nn Selec Selec Selec Y
54. keys for manually setting measurement locations White allows knob adjustment of white packet center position Yellow allows knob adjustment of yellow packet center position Blue allows knob adjustment of blue packet center position Black allows knob adjustment of black packet center position Measure Cycles selects the number of chrominance subcarrier cycles measured in each packet Press the soft key and turn the knob to change the number of cycles Exit leaves the Special Position display and returns to the previous display Amplitude Submenu 75 with 100 Flag 75 100 75 with 100 Flag selects 75 colorbar with 100 white flag 75 selects 75 colorbar 100 selects 100 colorbar VM700T Option 30 Component Measurements User Manual 2 13 Operating Basics K Factor Measurement The K Factor measurement measures K 2T K 5T and Pulse to Bar ratio on Y Pb and Pr input signals Figure 2 9 shows a typical K Factor measurement display The display shows signals superimposed on K 2T K 7T Pb and K 7T Pr graticules Digital readouts also show the measured values of K PB as a percent of K Factor and HAD K Factor displays indicators large arrows next to the readouts when the input signal exceeds preset limits Arrow direction indicates above limit or below limit readings You can set the K Factor upper and lower limits in the current Component measurements ConfigFiles directory Refer to Configur
55. lay 2 43 Parade 2 46 Vector 2 49 menus Bowtie 2 4 Artif Ref 2 5 Clamp Couple 2 5 Main 2 4 Channel Delay 2 6 ColorBar 2 10 K Factor 2 14 LevelMeter 2 19 Lightning 2 24 Clamp Couple 2 26 Main 2 25 Scale 2 26 Luminance NonLinearity 2 27 Multiburst 2 32 Overlay 2 43 Parade 2 46 Vector 2 49 Multiburst measurement 2 32 menu 2 32 Multiburst Acquire submenu Block Lines 2 35 Index 4 Block Mode 2 35 Block Step 2 35 Special Position 2 35 Multiburst dB Reference submenu OdB Reference 2 35 Flag 2 35 Rescale 2 35 Multiburst main menu Acquire 2 34 Average Num 2 33 Reference 2 33 Relative to Reference 2 34 Rescale 2 34 Multiburst Reference submenu Show 1 Reference 2 34 Show 2 Reference 2 34 Store 1 Reference 2 34 Store 2 Reference 2 34 Multiburst Relative to Reference submenu Use 1 Reference 2 34 Use 2 Reference 2 34 Multiburst Select Y Pb Pr submenus Center 2 37 FlagStart 2 36 FlagWidth 2 36 Packet 2 36 Previous Display 2 37 Set Default 2 36 Width 2 37 Multiburst Special Position submenu Select Pb 2 36 Select Pr 2 36 Select Y 2 36 N name list front panel buttons 3 4 No Change amp Exit soft key 1 6 Noise Spectrum measurement 2 38 menu 2 39 Noise Spectrum Acquire submenu Block Lines 2 42 Block Mode 2 41 Block Step 2 42 InputGate 2 41 Noise Spectrum Cursors submenu Cursor 1 Active 2 41 Cursor 1 On 2 41 Cursor 2 Active 2 41
56. lay Main Menu Average Average Num specifies the weighting factor to be used for Num averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Reference Reference displays the Reference submenu This menu lets you store the current display as user reference 1 or user reference 2 or show what is currently stored as user reference 1 or user reference 2 Relative Relative To Ref displays the Relative to Reference submenu To Ref This menu lets you subtract either of two stored reference values from the signal being measured The displayed result is the difference between the measured signal and the reference value selected Operating Basics Acquire Acquire displays the Acquire submenu with soft keys for frequency and block acquisition control Bowtie Bowtie Display presents the Bowtie Display submenu and a Display Bowtie display with marker Rescale Rescale adjusts the display graticule for the appropriate displayed resolution Reference Submenu Store 1 Store 1 Reference begins averaging up to 256 and stores Reference current display values as user reference 1 when released Store 2 Store 2 Reference begins averaging up to 256 and stores Reference current display values as user reference 2 when released NOTE You ca
57. lication You can use the following VM700T remote commands with the Component Measurement option The execute command starts the specified VM 700T application An application is one of the executable files with exceptions noted below found in the Instrument Operations VM700 Diagnostics Video Measurements or Audio Measurements directories in the Executable Files directory Selecting an operational mode application such as Vector is equivalent to pressing the front panel button the LED on the selected button is turned on Selecting a measure ment or diagnostic application is equivalent to touching the desired soft key Example VM700T execute Bowtie VM700T Option 30 Component Measurements User Manual Remote Commands and Keywords You can run these Component Measurement applications under remote control Be sure to use the same capitalization and tildes as shown m Bowtie m Component Channel_Delay m Component ColorBar m Component K_Factor m Component LevelMeter m Component Multiburst m Component Noise m Component NonLinearity m Component Vector m Lightning m Overlay W Parade get keyword The get command returns the configuration file value specified by keyword on channel letter the channel specified by channel letter The keywords available are listed in Table 3 3 and Table 3 4 The choice of channel letters is A B or C Example VM700T gt get EBWT A The above example returns the Bowt
58. mote Commands and Keywords LESEN II Remote Commands and Keywords Like other VM 700T Video Measurement Set video functions remote control of Component measurement functions is performed through the serial RS 232C or parallel GPIB option 48 ports on the VM 700T rear panel Using the remote control functions requires that you connect a terminal or computer to the VM700T through the RS 232C port with a correctly wired interconnect cable If you use a computer you will also need a suitable VM 700T terminal program such as the Tektronix application VMT for serial communication VMT offers a choice of either menu selection or command line entry of VM 700T remote commands For GPIB communications you will need a GPIB controller and appropriate controller programming Connection between the GPIB controller and the VM 700T is through a standard GPIB interface cable For information about configuring the VM 700T serial ports for remote opera tion see the VM 700T RS 232 Interface Programmer Manual The Programmer manual discusses the VM 700T RS 232C port requirements in detail and shows typical cable wiring configurations For information on using GPIB for remote operation see the VM 700T Option 48 GPIB Interface Programmer Manual Remote Control Capabilities Capabilities available while operating the VM 700T from a remote location include m Make a specific manual measurement or Auto mode series of measurements W Execute and interrupt a fu
59. n obtain the best reference by using a large averaging number Show 1 Reference Show 2 Reference Show 1 Reference displays the date and values of user reference 1 Show 2 Reference displays the date and values of user reference 2 Relative to Reference Submenu Use 1 Reference Use 2 Reference Use 1 Reference selects user defined Reference 1 to compare with the signal being measured Use 2 Reference selects user defined Reference 2 to compare with the signal being measured Acquire Submenu Frequency Set Block Mode 2 8 Frequency Set presents soft keys that let you select frequency acquisition options Block Mode enables Block mode The block starts at the system line VM700T Option 30 Component Measurements User Manual Operating Basics Block Lines Block Lines sets the number of lines to average for the nn measurement The default number of block lines to average is 3 The range is 2 to 32 lines but the actual number of lines measured can be smaller if the last line of the block exceeds the current field Block Step Block Step sets the number of lines to step in the block The nnn default number of lines to step is 2 the range is 2 to end of the field Bowtie Display Submenu Marker Marker allows marker position adjustment when you turn the nn n psec knob with this soft key selected The marker is not used for measurement Exit Exit leaves the Bowtie display and re
60. n of the Bowtie null point when the Use Artif Ref soft key is highlighted When the Bowtie measure ment begins this value is updated from the non volatile memory of the VM700T to the latest value stored using the Store Artif Ref soft key If no value is stored a default value is used Use Use Artif Ref changes the reference location of the null point Artif Ref to the time displayed in the Artif Ref box Store Store Artif Ref stores the time displayed in the Artif Ref box Artif Ref into the VM 700T non volatile memory Until a new artificial reference is stored this stored value becomes the current value whenever the Bowtie measurement starts Clamp Couple Submenu Clamp Clamp Slow selects slow clamp speed This speed allows Slow visible hum effects but is useful in coping with large DC offsets on an input signal Clamp Clamp Fast selects fast clamp speed This speed removes DC Fast offset hum and bounce effects from the signal This is the default clamp setting for the Bowtie measurement DC DC Coupling selects DC coupling no clamping Coupling Markers and Artificial When an artificial reference is not used this is the case most of the time the References VM700T searches a line identified as Marker Line in the Measurement Locations file for the occurrence of markers for example time intervals where the marker line exceeds 0 0 IRE units The VM700T counts the number of markers found on this line then uses the position o
61. nction Function key m Temporarily change the configuration of a channel limit files selected measurement files and measurement location files printer type and port for each type of output Copy Report Log specify an End of File character for printer output The remote commands that access the Component Measurement functions are the same as those used for other VM 700T functions The command arguments are listed and described below The information in this section assumes that you are familiar with manual operation of the VM 700T and understand the principles of remote VM 700T operation For information on working with VM 700T remote control commands see the VM 700T RS 232 Interface Programmer Manual VM700T Option 30 Component Measurements User Manual 3 1 Remote Commands and Keywords Command Format NOTE The abbreviated remote command description that follows assumes you understand the principles of remote VM700T operation and have access to the VM700T RS 232 Interface Programmer Manual The VM700T remote control commands use this form command argument s Table 3 1 VM700T remote control commands format Format Description command The actual command name italic Variable values Optional arguments A discussion of command usage and arguments follows the command header Note that VM700 gt is a prompt which you can change not an input Component Measurement Remote Commands execute app
62. ng with large DC offsets on an input signal Clamp Clamp Fast selects fast clamp speed This speed removes DC Fast offset hum and bounce effects from the signal This is the default clamp setting for the Lightning measurement DC DC Coupling selects DC coupling no clamping Coupling 2 26 VM700T Option 30 Component Measurements User Manual Operating Basics Luminance NonLinearity Measurement Luminance NonLinearity measures luminance nonlinear distortion Figure 2 15 shows the Luminance NonLinearity display The display stacks the nonlinear distortion measurements for the three compo nent signals For each signal the display plots the step height of each packet as a percentage of the largest step size packet A digital readout of each packet s step size is also provided as well as a peak to peak value showing the difference between the maximum and minimum step sizes Arrows on the display indicate an out of limits condition Non linear distortion limits for Y Pb and Pr components are set to default values You can change these values in the current Component measurements ConfigFiles directory Refer to Configuring the Component Measurement Limit File on page 1 3 for more information Luminance Non Linearity Component Field 1 Line 50 100 0 100 0 100 0 100 0 100 0 100 0 100 0 100 0 100 0 100 0 100 100 100 99 99 P P Pb 0 0 No ON n 100 0 100 0 100 0 100 0 100 100 2 100
63. nob moves or expands the vertical scale for the display VM700T Option 30 Component Measurements User Manual Operating Basics Vector Measurement The component Vector measurement is an X Y display of the Pb and Pr components see Figure 2 27 Component Vector SMPTE EBU 75 Field 1 Line 50 Synchronous Average Off Figure 2 27 Vector measurement display Vector Menu Pressing the Menu button while the Vector Measurement is running displays the Vector measurement main menu Figure 2 28 shows the Vector menu tree Vector Average Amplitude Rescale Main Menu Num _32 Amplitude 75 100 Submenu Figure 2 28 Vector menu tree VM 700T Option 30 Component Measurements User Manual 2 49 Operating Basics Vector Main Menu Average Average Num specifies the weighting factor to be used for Num nnn averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Amplitude Amplitude displays soft keys that let you select 75 or 100 colorbars Rescale Rescale adjusts the display graticule for an appropriate displayed resolution Amplitude Submenu 75 75 selects 75 colorbar 100 100 selects 100 colorbar 2 50 VM700T Option 30 Component Measurements User Manual en game Re
64. nt levels in mV ColorBar Menu Pressing the Menu button when the ColorBar measurement runs displays the ColorBar main menu The ColorBar menu tree is shown in Figure 2 8 2 10 VM700T Option 30 Component Measurements User Manual Operating Basics ColorBar Main Menu Reference Submenu Relative to Ref Submenu Acquire Submenu Special Position Submenu Amplitude Submenu VM700T Option 30 Component Measurements User Manual Average Reference Relative Acquire Amplitude Rescale Num 32 to Ref Store 1 Store 2 Show 1 Show 2 Reference Reference Reference Reference Use 1 Use 2 Use CBStd Rescale Reference Reference Reference Special Block Block Block Position Mode Lines nn Step nn l l Auto White Yellow Blue Black Measure Exit Scan nnnysecl nn n usec nn n usec nn n usec Cycles n 75 with 15 100 100 Flag 1 Only when Auto Scan is not selected Figure 2 8 ColorBar menu tree ColorBar Main Menu Average Average Num specifies the weighting factor to be used for Num nnn averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value touch the Average Num soft key to highlight it rotate the knob
65. r 2 Peak On On Active Active Input Block Block Block Gate Mode Lines nn Step nnn Normal Area Width Area Pos Exit nn n usec nn n usec 1 PAL only NTSC only 3 Only with Y selected Only with Pb or Pr selected 5 Only with either cursor activated Figure 2 22 Noise Spectrum menu tree VM700T Option 30 Component Measurements User Manual 2 39 Operating Basics 2 40 Noise Spectrum Main Menu Average Average Num specifies the weighting factor to be used for Num nnn averaging The Average Num range is 1 to 256 The default value is 32 To change the Average Num value press the Average Num soft key to highlight it rotate the knob until the desired weighting factor appears then press the Average Num soft key again Y Pb Pr Y Pb Pr select displays soft keys for display and filters Select selection Cursors Cursors provides soft keys to display and activate the two noise spectrum cursors Readouts for the cursors give the peak to peak dB value at the frequency location of the cursors and the noise level in dB rms between the cursors Acquire Acquire displays the Acquire submenu with soft keys for frequency and block acquisition control Tilt Null Tilt Null automatically compensates for tilt horizontal sag to enable measuring the noise spectrum on a ramp signal Note the noise floor can be slightly higher because the auto gain increase is limited by the larger peak to peak amplitude of the signal Rescale Rescale adju
66. re information Noise Spectrum Component Field 1 Line 50 Amplitude 0 dB 714 mV p p Noise dB rms o Band width 10kHz to 4 2MHz 5 10 15 20 25 30 35 40 45 50 55 60 65 170 75 80 85 90 95 100 e 999595999999999999959955 f i T j i i i B 1 0 2 0 3 0 4 0 5 0 MHz Average 32 gt 32 Figure 2 21 Noise Spectrum measurement display VM700T Option 30 Component Measurements User Manual Operating Basics Noise Spectrum Menu Noise Spectrum Main Menu Y Pb PR Select Submenu Filters Selection Submenu Cursor Submenu Acquire Submenu Input Gate Submenu Pressing the Menu button while the Noise Spectrum measurement is running displays the Noise measurement main menu The Noise measurement menu tree is shown in Figure 2 22 Average Y Pb Pr Cursors Acquire Tilt Rescale Num 32 Selec Null Selec Selec Selec Filters Y Pb Pr Selection High Pass Low Pass NTC 7 Chroma 200 kHz 4 2 MHz Weighting23 Weight13 High Pass Low Pass Unified FSC Trap Low Previous 100 kHz 5 0 MHz Weighting 3 Filter Pass Display Nearest Cursor 1 Cursor 2 Cursor 1 Curso
67. ry display becomes JOHN SMITH when referred to in a remote operation 5 Touch the Done soft key when you have named the file The VM 700T displays the new file containing the Component Measurement limits from the file you selected as the template You can edit the parameters in this file If you do not want to create the new file touch Cancel to quit the process System Default NewLimits NTSC Files In nvram ConfigFiles Component NTSC Switch Create Print Leave Delete Rename NTSC PAL File File Directory Figure 1 5 Creating a new file VM700T Option 30 Component Measurements User Manual 1 5 Configuring the Option Editing a Component Measurement Limit Text Parameter Deleting a Component Measurement Limit File 16 To change any Component Measurement limit text parameter 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 not change 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 Accept Input soft key to accept the change The highlight box disappears and the new parameter displays NOTE If you change a parameter and do no
68. se parameters cannot be changed To modify file parameters you do the following create a file select the existing file to be used as a template name the file you created edit the information in the new file as needed accept the edits save the changes If the system default Video Source file is acceptable the VM 700T uses this file as it performs video measurements To change the Video Source file complete the procedure described in the following section Editing the Video To modify the Video Source file Source File Touch the Create File soft 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 Touch the appropriate soft key for the file you want to use for example System Default A keyboard displays Type the name for your new file Touch the Done key The VM 700T displays the contents of the new file that contains the Video Source data from the file you selected as the template You can modify parameters in this file If you do not want to create the new file touch Cancel to quit the process VM700T Option 30 Component Measurements User Manual 1 7 Configuring the Option 1 8 Changing the Video Source Parameters NewSource System Default NTSC Files In nvram ConfigFiles Video Source Files NTSC Delete Switch Create Rename Print Leave NTSC PAL File File Directory
69. se values in the current Component measurements ConfigFiles directory Refer to Configuring the Component Measurement Limit File on page 1 3 for more information Component Multiburst Field 1 Line 50 Amplitude 0 dB 100 of 421 2 mV 421 3 mV 419 5 mV Flag dB 0 00 0 02 0 07 0 08 0 13 0 15 _ 0 00 0 01 0 05 0 03 0 01 Pb 0 0 Pr 0 50 1 00 1 50 2 00 2 50 Average 32 gt 32 Figure 2 18 Multiburst measurement display Multiburst Menu Pressing the Menu button while the Multiburst measurement is running displays the Multiburst main menu The Multiburst menu tree is shown in Figure 2 19 2 32 VM700T Option 30 Component Measurements User Manual Operating Basics Multiburst Main Menu Reference Submenu Relative to Ref Submenu dB Reference Submenu Acquire Submenu Special Position Submenu Select Y Pb and Pr Submenus Average Reference Relative dB Acquire Rescale Num 32 to Ref Reference Store 1 Store 2 Show 1 Show 2 Reference Reference Reference Reference Use 1 Use 2 Reference Reference 0 dB Flag Rescale Ref nnn Special Block Block Block Position Mode Lines nn Step nn Selec Selec Select Y Pb Pr Set FlagStart Fla
70. siipi o pei as ee CEP GO UN ER kasd 2 10 K Factor Measurement lab ERREUR oes Che gies 2 14 K Factor Menu itu sik vest ais desis iis as oe e ERE CREER 2 14 LevelMeter Measurement 0 00 0 cece eee eee 2 19 LevelMeter Menu isi setenta hp ews BAe NER EE aes 2 19 Taghining 04 cette shes ots ER Bilt aes Meh ad oleh ae aah sO acy 2 23 Lightning Display 3 5 tsp Bow EORR deh ee eae a aa 2 23 Lightning Menu i ss LE t ae ees be e be DE ha 2 24 Luminance NonLinearity Measurement 0 0000 c eee ee eee 2 27 Luminance NonLinearity Menu 0 00 cece ee eee eee 2 27 Multiburst Measurement 0 cece cee cece eee ene 2 32 Multiburst Menu ciis cs sis ee et es 8 betas See EQ DERE 2 32 Noise Spectrum Measurement 0 0 cece cece eee eee 2 38 Noise Spectrum Menu 0 0 c eee eee eee 2 39 Overlay Measurement sus RR Bidens Bate he RR UR ERU oie 2 43 Overlay Menifee eux be beni DILE E she sive ee aca 2 43 Parade Measurement 00 2 a o a eee ene 2 46 Parade Menu 5 EO cates tests eit ae oe bias o b S 2 46 Vector Measurement i suus kp ER Banas lias IEEE CES 2 49 Vector Ment 4 san RE LEERLO VPE ORE OEL RR 2 49 Remote Commands and Keywords Remote Control Capabilities lese ese 3 1 VM700T Option 30 Component Measurements User Manual i Table of Contents Index Command Format 12 a bas shale cad e SA awe Ses ER 3 2 Component Measurement Remote Commands
71. sition submenu Auto Scan 2 13 Black 2 13 Blue 2 13 Exit 2 13 Measure Cycles 2 13 White 2 13 Yellow 2 13 command format 3 2 commands execute 3 2 get 3 3 getresults 3 3 hardkey 3 4 set 3 4 show 3 5 softkey 3 5 Component Measurement limit file changing parameters 1 6 configuring 1 3 creating 1 3 Component Measurement limits file 1 1 Component soft key 1 3 Configure button 1 1 3 4 Configure Files soft key 1 2 configuring begin 1 1 Component Limit files 1 3 Source Selection Video 1 9 steps 1 1 Video Source files 1 7 Create File soft key 1 7 D DC Coupling soft key 2 5 2 26 Delete soft key 1 6 deleting a limit file 1 6 Determine ColorBars soft key 2 25 directory Video Options 2 1 display Bowtie 2 2 Done soft key 1 5 Draw Numbers soft key 2 25 Index 2 E execute VM 700T Command 3 2 F file template 1 3 files Component Measurement limits 1 1 1 3 deleting 1 6 Measurement Locations 2 5 rules for naming 1 4 Source Selection Video 1 1 Video Source 1 1 1 8 format commands 3 2 Function button 3 4 G get VM 700T Command 3 3 get command keywords 3 5 getresults VM 700T Command 3 3 graticules 2 23 H hardkey VM 700T Command 3 4 K K Factor measurement 2 14 menu 2 14 K Factor Acquire submenu Block Lines 2 17 Block Mode 2 16 Block Step 2 17 Special Position 2 16 K Factor Graticule submenu CCIR 2
72. stem default files cannot be changed If the system default Component file is acceptable the VM 700T uses it if it is the selected file to measure input video signals You can modify the Component limits from the system defaults Complete the following tasks to modify Component Measurement limit file parameters System Default NTSC Files In nvram ConfigFiles Component NTSC Delete Switch Create Rename Print Leave NTSC PAL File File Directory Figure 1 3 Component measurement limit menu choices Create a Component 1 Touch the Create File soft key The query line the top line of the display Measurement Limit File asks you to select a file to use as a template for your new file 2 Touch the soft key of the desired file for example System Default 3 The screen displays a keyboard that you can use to type a name for your new file see Figure 1 4 VM700T Option 30 Component Measurements User Manual 1 3 Configuring the Option 14 Please enter file name max 31 characters NewLimi T JBOD CJ e Cancel sett set2 Space shift Figure 1 4 File naming keyboard 4 Type the new file name observing the following rules and noting the special uses of some characters and keys Spaces are not allowed in file or directory names use an underline _ or dot to separate words in a name
73. sts the display graticule for the appropriate displayed resolution Y Pb Pr Select Submenu Select Y Select Y displays the data or waveform of source A Select Pb Select Pb displays the data or waveform of source B Select Pr Select Pr displays the data or waveform of source C Filters Filters Selection provides soft keys to select one or more noise Selection filters for the selected source Filters Selection Submenu High Pass 100 kHz High Pass 200 kHz Low Pass 4 2 MHz High Pass 100 kHz selects the 100 kHz high pass filter Signal information below 100 kHz is removed High Pass 200 kHz PAL only selects the 200 kHz high pass filter Signal information below 200 KHz is removed Low Pass 4 2 MHz NTSC only selects the 4 2 MHz low pass filter Signal information above 4 2 MHz is removed VM700T Option 30 Component Measurements User Manual Operating Basics Low Pass Low Pass 5 0 MHz selects the 5 MHz low pass filter Signal 5 0 MHz information above 5 MHz is removed Unified Unified Weighting only with Y selected selects the standard Weighting CCIR unified weighting filter NTC 7 NTC 7 Weighting NTSC only selects the standard NTC 7 Weighting weighting filter Chroma Chroma Weighting PAL only filters the signal to display Weighting approximately 3 to 6 MHz FSC Trap FSC frequency at subcarrier Trap Filter selects the subcarrier Filter trap filter Low Pass Low Pass only with Pb or Pr selected selects
74. t want to save the change touch the No Change amp Exit soft key The VM 700T asks you to touch the No Change amp Exit soft key again to verify that you want to exit without changing anything To display the file you created touch its soft key When making extensive changes to a file avoid losing changes by touching the Update amp Exit soft key after each change then re enter the file That way if you make a mistake and must exit the file earlier work is retained while the most recent change or mistake is eliminated To delete a modified Component Measurement limit file Touch the Delete soft key in the Component files directory The query line the top 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 VM 700T begins the deletion process The file is deleted when its soft key completely disappears from the screen NOTE Touch the Cancel soft key replaces the Delete soft key when deletion begins to halt the deletion process You can also halt file deletion by touching the file soft key 3 Touch the Leave Directory soft key to return to the Configure menus VM700T Option 30 Component Measurements User Manual Configuring the Option Configuring the Video Source Files Touch the Video_Source Files soft key to enter the Video Source Files directory The Video Source files are displayed Touching a soft key displays the parameters in a file the
75. turns to the previous display Frequency Set Submenu Set To Set To Default resets the frequency to the default value Default Set To Set To Measured sets the frequency to the measured value Measured Y Y nnn kHz select the frequency for Y source A nnn kHz Pb Pr Pb Pr nnn kHz displays soft keys for display and filters nnn kHz selection VM700T Option 30 Component Measurements User Manual 2 9 Operating Basics ColorBar ColorBar measures the Y Pb and Pr amplitudes of each chroma packet and displays them on three separate graticules as millivolt levels and their associated colors The ColorBar measurement display is shown in Figure 2 7 Each graticule includes the measurement limits for each color the limits are shown as a dashed horizontal line extending the width of each color You can set the ColorBar measurement limits in the current Component measurements ConfigFiles directory Refer to Configuring the Component Measurement Limit File on page 1 3 for more information Colorbar SMPTE EBU 75 Field 1 Line 50 Y Level mV 200 0 702 0 467 0 370 5 310 4 217 5 158 5 60 5 0 3 600 Pb Level mV 0 1 263 5 88 9 174 4 174 2 89 1 263 2 0 0 Pr Level mV 0 1 42 4 262 4 220 1 219 6 262 1 42 5 0 1 TUE es SE ee LP NAR Ira M a a DEC aa Gad M D eaae aani aaien TER ee ee ep ea Se Gray Yellow Cyan Green Magenta Red Blue Black Average Figure 2 7 ColorBar display showing color difference compone
76. two other soft keys chooses the location and measurement area Pressing the soft key displays cursors indicating location width and frequency 2 36 VM700T Option 30 Component Measurements User Manual Operating Basics Center Center selects the center location of the packet only when the Packet soft key is selected Width Width selects the measurement area of the packet only when the Packet soft key is selected Previous Previous Display leaves the Special Position display and Display returns to the previous display VM700T Option 30 Component Measurements User Manual 2 37 Operating Basics Noise Spectrum Measurement 2 38 Noise Spectrum measures noise level and performs spectrum analysis Figure 2 21 shows the Noise Spectrum display The display plots noise level in decibels where 0 dB 714 mV p p versus frequency in MHz A digital readout also displays the rms noise level of the entire bandwidth for each component An arrow indicates the component being displayed You can select one of the components for display by touching the Y Pb Pr Select soft key and touching the soft key for the component desired Arrows on the display indicate an out of limits condition The measurement limits for Y Pb and Pr noise spectrum levels are set to default values You can change these values in the current Component measurements ConfigFiles directory Refer to Configuring the Component Measurement Limit File on page 1 3 for mo
77. until the desired weighting factor appears then touch the Average Num soft key again Reference Reference displays the Reference submenu which lets you store the current display as user reference 1 or user reference 2 or show what is currently stored as user reference 1 or user reference 2 Relative Relative To Ref displays the Relative to Reference submenu To Ref which lets you subtract either of two stored reference values from the signal being measured The displayed result is the difference between the measured signal and the reference value selected 2 11 Operating Basics 2 12 Acquire Acquire displays the Acquire submenu which provides soft keys for defining measurement positions on the waveform Amplitude Amplitude provides soft keys to select 75 or 100 colorbars Rescale Rescale adjusts the display graticule for the appropriate displayed resolution Reference Submenu Store 1 Store 1 Reference begins averaging up to 256 and stores Reference current display values as user reference 1 when released Store 2 Store 2 Reference begins averaging up to 256 and stores Reference current display values as user reference 2 when released NOTE You can obtain the best reference by using a large averaging number Show 1 Reference Show 2 Reference Show 1 Reference displays the date and values of user reference 1 Show 2 Reference displays the date and values of user reference 2
78. ure 2 8 Figure 2 9 Figure 2 10 Figure 2 11 Figure 2 12 Figure 2 13 Figure 2 14 Figure 2 15 Figure 2 16 Figure 2 17 Figure 2 18 Figure 2 19 Figure 2 20 Figure 2 21 Figure 2 22 Figure 2 23 Channel delay menu tree eee 2 7 ColorBar display showing color difference component MAD VY 2l2e nsereevesserenneter e es bee Pea eee UE Rue 2 10 ColorBar menu tree cece ccc e cece eeeens 2 11 K Factor component measurement display 2 14 K Factor menu tree 0 cece cece ce eee ee 2 15 LevelMeter measurement display 2 19 LevelMeter menu tree cece cece eee eee 2 20 Lightning display eee 2 24 Lightning menu tree eeeeeee eee 2 25 NonLinearity measurement display 2 27 NonLinearity menu tree eeeeeeeeee 2 28 Luminance NonLinearity special position display 2 30 Multiburst measurement display 2 32 Multiburst menu tree eeeeeeeeeee 2 33 MultiBurst special position display 2 36 Noise Spectrum measurement display 2 38 Noise Spectrum menu tree eeeeeee 2 39 Overlay measurement display Overlay Channels mode eeeeeeeeeeeee e nnn 2 43 Figure 2 24 Figure 2 25 Overlay menu tree cece ccc cece wesc ee cnes 2 44 Parade measurement display
79. y the measurement selections for the Component option VM700T Option 30 Component Measurements User Manual 2 1 Operating Basics Bowtie 2 2 Bowtie Display Bowtie measures timing and amplitude differences between the three channels in an analog component system using a bowtie signal available from some component signal generators To set up the VM700T to run the Bowtie measurement connect m The Luminance Y output signal to Channel A m The B Y signal to Channel B m The R Y signal to Channel C Make sure that the incoming signal is a bowtie signal The Bowtie display consists of two voltage vs time 1H displays of Y minus B Y and Y minus R Y shown side by side Figures 2 2 and 2 3 show typical Bowtie measurement displays Bowtie F1 L 49 Marker line F1 L164 Centermost of 13 markers 35 71 uSec 0 7 ns Relative Timing 1 3 ns 1 25 mV Relative Amplitude 0 75 mV Figure 2 2 Bowtie display showing nearly ideal waveform An ideal set of component signals that is one that exhibits neither timing nor amplitude differences produces waveforms that cross the exact center or null point of both graphs A solid vertical line in the center of each graph indicates the expected null point A dashed vertical line in each graph indicates the actual null point Two horizontal lines indicate the top and bottom of the waveform at the measured null point VM700T Option 30 Component Measurements User Manual Operating

User Manual VM700T Video Measurement Set Option 30

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