Page 1 User Manual VM700T Video Measurement Set Option 11 PAL Measurements 070-9649-02...
Page 2 User Manual VM700T Video Measurement Set Option 11 PAL Measurements 070-9649-02 This document supports firmware version 2.10e and above.
Page 3 Commercial Computer Software – Restricted Rights clause at FAR 52.227-19, as applicable. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.
Page 4: Table Of Contents
..........2–64 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 5 ............Index VM700T Video Measurement Set Option 11 PAL Measurements...
Page 6 ....... 2–65 Figure 2–40: K_Factor measurement right reference clamped ..2–66 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 7 ....... 2–123 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 8 ......A-10 Table A-32: Incidental Carrier Phase Modulation ....A-10 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 9 Table of Contents VM700T Video Measurement Set Option 11 PAL Measurements...
Page 10: Preface
The manual contents are arranged in the following order: Getting Started provides a brief overview of Measure mode and Auto mode measurement operation. Refer to the VM700T Option 01 & Option 11 User Manual for more complete operating instructions for the VM700T Video Measurement Set.
Page 11 Preface viii VM700T Video Measurement Set Option 11 PAL Measurements...
Page 12: Getting Started
Getting Started...
Page 14 Getting Started The VM700T Option 11 (PAL) gives you access to a large variety of interactive (Measure mode) and automatic (Auto mode) measurements. Measure mode measurements are user-selectable, interactive, graphical applica- tions that make measurements on video signals. The Measure Mode section of this manual starting on page 2–1 describes each Measure mode measurement.
Page 15 Getting Started The specifications for the PAL measurements of the VM700T Option 11, in both Measure and Auto modes, are found in Appendix A: PAL Measurement Specifica- tions. 1–2 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 16: Measure Mode
Measure Mode...
Page 18: Table 2-1: Measure Mode Measurements And Signal Qualities
Chrominance-to-luminance gain & delay inequality GroupDelay SinX_X Frequency response, group delay (both with SinX/X signal) K_Factor Short Time Distortion (K pulse/bar ratio) MultiBurst Frequency response (with MultiBurst signal) TwoField Field time distortion 2–1 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 19: Bar Linetime
Both the bar top position and the black-level reference position can be adjusted using soft keys on the Special Position submenu of the Acquire soft key. 2–2 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 20: Figure 2-1: Bar Linetime Display
Bar Width Width in s of the bar from the 50% levels of the rising and falling edges. 2–3 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 21: Bar Line Time Menu
Acquire Submenu Special +V Phase –V Phase Block Block Block Position Only Only Mode Lines Step Special Position Submenu Reference Bar Pos Exit Default Default Default Figure 2–2: Bar LineTime menu tree 2–4 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 22 Reference reference to which measured values are compared. If no refer- ence value has been stored, touching either soft key displays a message that the reference is not defined. 2–5 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 23: Figure 2-3: Bar Linetime Special Position Display
The default number of Block Lines to average is 3. Block sets the number of lines to step in the block. The Step default number of lines to step is 2. Figure 2–3: Bar LineTime special position display 2–6 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 24 50% rising edge and the 50% falling edge times of the bar. Exit leaves the Special Position submenu and displays the Bar LineTime display. 2–7 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 25: Bounce
High APL region. gives the % of deviation on the Blank level (Back Porch Level) relative to the amplitude of the bounce signal in the High APL region. 2–8 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 26: Bounce Menu
(APL) transition. For accurate results, measured settling times must be much less than the bounce period. 2–9 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 27: Figure 2-5: Bounce Menu Tree
Rescale restores the vertical display to its default scale. Display Submenu Sync Tip selects/deselects sync tip for the display. BackPorch selects/deselects back porch for the display. 2–10 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 28 NOTE. The actual sampling line is line 132 in NTSC and line 160 in PAL. If the firmware can not detect the Bounce signal, it will try to find it in the following line (up to 32 lines) 2–11 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 29 Active position cursor 1. Cursor 2 displays cursors and permits the knob to Active position cursor 2. Cursor displays cursors and permits the knob to Track position both cursors together (track). 2–12 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 30: Typical Measurement Results
Measure Mode Typical Measurement See Figure 2–4 on page 2–8 for the waveform display for Example 1. Results Example 1 2–13 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 31: Burst Frequency
Reference soft key. (Refer to Setting the Reference Burst Frequency on page 2–16.) If you use the colour burst of another channel as a reference frequency on a Dual-Standard VM700T or use Reference Internal, both signals should use the same standard (NTSC or PAL). 2–14...
Page 32: Burst Frequency Menu
A reference frequency stored with the Zero Set soft key is required for calibration. Reference sets the burst frequency reference to Ch. A Channel A. Reference sets the burst frequency reference to Ch. B Channel B. 2–15 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 33: Setting The Reference Burst Frequency
VM700T is powered down or until another reference signal is stored. To use the frequency of the internal crystal of the VM700T as a reference frequency without calibration, disconnect any signals from the current sync source, then touch the Zero Set soft key.
Page 34: Chromlum Gaindelay
Lum Gain (%) in the active Measure_Limits file). The position of the + within the box indicates delay (in ns) along the horizontal scale and gain (in %, relative to luminance) on the vertical scale. 2–17 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 35: Chromlum Gaindelay Menu
When a stored reference is selected, the currently measured value is compared to the stored reference value. Acquire displays the Acquire submenu that controls how the signal is acquired for the specific measurement. 2–18 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 36 Measure Mode causes the VM700T to search the insertion test Search signals for a signal appropriate for the measurement. If an appropriate signal is not located, the message Not found displays briefly on the display. Rescale sets the expansion factor of the display to an appropriate scaling factor for the ChromLum GainDelay measurement display graticule.
Page 37: Figure 2-10: Chromlum Gaindelay Special Position Display
The default pulse position is determined automatically by the type of signal being measured. Exit leaves the Special Position submenu and displays the ChromLum GainDelay display. 2–20 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 38: Chrominance Ampm
Chrominance AMPM display (Figure 2–11). The display features are as follows: two graphic “meters” that show the measured values of AM and PM noise digital readouts of the measurements 2–21 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 39: Figure 2-11: Chrominance Ampm Display
0 dB level for the measurement, and whether Averaging is off or on; if on, it indicates the current weighting factor used for averaging, as well as the number of sampling points acquired. 2–22 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 40: Chrominance Ampm Menu
(such as, by a VCR). Acquire displays the Acquire submenu that select full field, burst, or single line acquisition, and to select field 1, field 2, or both fields. 2–23 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 41 (which can be set with the knob); the effective chrominance signal amplitude becomes a user-specified value measured chrominance amplitude. 2–24 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 42 (for high-pass 100 kHz/ filtering) or higher than the specified frequency (for low-pass Low Pass filtering) is filtered out. 100 kHz/ 500 kHz/ 1.0 MHz 2–25 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 43: Chrominance Nonlinearity
The measurement is referenced to the 700 mV level, and is expressed as a percentage of 700 mV. 2–26 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 44: Chrominance Nonlinearity Menu
Position Only Only Mode Lines 3 Step 2 Special Position Submenu Packet 1 Packet 2 Packet 3 Ref Pos. Exit Default Default Default Default Default Figure 2–14: Chrominance NonLinearity menu tree 2–27 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 45 Acquire submenu that controls how the signal is acquired for the specific measurement. ITS Search causes the VM700T to search the insertion test signals for a signal appropriate for the measurement. If an appropriate signal is not located, the message Not found displays briefly on the display.
Page 46: Figure 2-15: Chrominance Nonlinearity Special Position Display
The default number of Block Lines to average is 3. Block sets the number of lines to step in the block. The Step default number of lines to step is 2. Figure 2–15: Chrominance NonLinearity special position display 2–29 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 47 The default reference measurement location is automati- cally defined for the type of signal being measured. Exit leaves the Special Position submenu and displays the Chrominance NonLinearity display. 2–30 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 48: Colorbar
The Chrominance Phase measurement is not made unless the chrominance amplitude is at least 35 mV. The message LOW CHROMA displays when chrominance amplitudes are less than this value. Figure 2–16: ColourBar display 2–31 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 49: Pre-Defined Colour Bar References
Average Num soft key again. Reference displays the Reference submenu which (1) stores the currently displayed values for use as a reference; or (2) displays previously stored reference values. 2–32 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 50: Figure 2-17: Colourbar Menu Tree
Not found displays briefly on the display. Rescale sets the expansion factor of the display to an appropriate scaling factor for the ColourBar measurement display graticule. The x- and y-axes adjust to accommodate the rescaled display. 2–33 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 51 Figure 2–18 shows the ColourBar Special Position display. +V Phase measures only the +V phase part of the signal. Only –V Phase measures only the –V phase part of the signal. Only 2–34 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 52: Figure 2-18: Colourbar Special Position Display
Deselecting this soft key displays the White, Yellow, Blue, Black, and Measure soft keys. NOTE. If severe luminance nonlinear distortion is present, the VM700T may not be able to find all the colour packets expected. In such cases, you must use manual positioning to set the location of each packet.
Page 53 The width of the displayed boxes shows the entire measurement area determined by the selected number of cycles. Exit leaves the Special Position display and returns to the ColourBar main measurement display. 2–36 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 54: Dgdp (Differential Gain/Differential Phase)
The lower half plots the differential phase for each packet, expressed in degrees of phase difference from the reference packet. Additional digital readouts show the minimum, maximum, and peak-to-peak values for differential phase. Figure 2–19: DGDP display 2–37 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 55: Dgdp Menu
Average Num soft key again. Reference displays the Reference submenu which (1) stores the currently displayed values for use as a reference; or (2) displays previously stored reference values. 2–38 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 56 Reference reference to which measured values are compared. If no reference value has been stored, touching either soft key displays a message that the reference is not defined. 2–39 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 57: Figure 2-21: Dgdp Special Position Display
The default number of Block Lines to average is 3. Block sets the number of lines to step in the block. The Step n default number of lines to step is 2. 2–40 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 58 VM700T displays soft keys to set measurement locations manually. NOTE. If severe luminance nonlinear distortion is present, the VM700T may not be able to resolve all the steps that were present in the original signal. In such cases, you must use manual positioning to set the location of each staircase step.
Page 59: Groupdelay Sinx_X
MHz—it is ignored). The new maximum frequency for Group Delay SinX_X remains set until the VM700T is powered off. The maximum frequency can be as high as 8.5 MHz for the PAL TV standard. Refer to the VM700T RS-232 Interface Programmer Manual for information on creating and running functions.
Page 60: Figure 2-23: Group Delay Sinx_X Bothpulse Response Display
The Group Delay SinX_X measurement requires a sin(x)/x signal. The measure- ment is set up to use a sin(x)/x signal from a Tektronix TSG-271 PAL Television Signal Generator by default; if the signal is generated by a different device, you will need to use the Special Position Submenu of the Acquire soft key to specify the first and second pulse positions in the test signal.
Page 61: Group Delay Sinx_X Menu
Area Double Pul 1 Pos Pul 2 Offs Exit Default 17.9 sec Pulse Mode 19.6 sec 32.06 sec Cursor Submenu Cursor Cursor Active Figure 2–24: Group Delay Sin x/x menu tree 2–44 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 62 Selecting Store (1) Reference or Store (2) Reference overwrites previous (1) Reference or (2) Reference values. References are stored in nonvolatile memory and are retained when the VM700T is powered down. 2–45 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 63 Figure 2–25 shows the Group Delay & Gain special position display. +V Phase Only measures only the +V phase part of the signal. –V Phase Only measures only the –V phase part of the signal. 2–46 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 64: Figure 2-25: Group Delay & Gain Special Position Display
Default position as determined by the SinX/X signal generated by the Tektronix TSG-271 signal generator. If any other soft key is highlighted, only that measurement location is changed. 2–47 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 65: Group Delay & Gain Display
Mode pulses, then computes the measurement. When deselected, the VM700T uses a single upward pulse to enable this measure- ment with a sine-squared pulse. This soft key should normally be highlighted to avoid errors caused by nonlinear distortion.
Page 66: H_Blank
(that is, the right-most start time and the left-most end time) over the range of lines selected. The H_Blank measurement can use any PAL video signal for input. Figure 2–26: H_Blank display 2–49 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 67: H_Blank Menu
On is the default. Meas. Line Start sets the measurement start line. Meas. Line End sets the measurement end line. Rescale adjusts the display graticule to an appropriate resolution. 2–50 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 68: H_Timing
Figure 2–28 are the following: sync to blanking start sync to blanking end sync to burst start burst width sync width burst level sync rise time sync fall time sync level Figure 2–28: H_Timing display 2–51 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 69: H_Timing Menu
The x- and y-axes adjust to accommodate the rescaled display. Acquire Submenu +V Phase Only measures only the +V phase part of the signal. –V Phase Only measures only the –V phase part of the signal. 2–52 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 70: Icpm (Incidental Carrier Phase Modulation)
Measurement Locations file. This measurement requires that both the video output and the quadrature output of a demodulator be connected to the VM700T. Video can be connected to either channel A or B, but the quadrature output must always be connected to the channel C input.
Page 71: Figure 2-30: Icpm Display; No Icpm Errors Present
Signal levels below the minimum or above the maximum percentage of the nominal carrier amplitude are excluded from the measurement. 2–54 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 72: Icpm Menu
In addition, displayed points are adjusted in the left-right direction (the quadrature axis) to maintain relevance with the cursor, tracking lines, and polar graticule. 2–55 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 73: Figure 2-32: Icpm Menu Tree
Plot All . When highlighted, all sampled data points display. When deselected, only points used in computing the ICPM measurement result are displayed. 2–56 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 74 Cursor . When highlighted, the knob moves the 0.0 Deg. displayed value by tenths of a degree; a cursor reflecting this value is displayed on the screen. 2–57 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 75 OFF. Selected % . When highlighted, the currently Car OFF highlighted Min % Car or Max % Car soft key is set to OFF, and the appropriate edge-value exclusion is removed. 2–58 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 76: Jitter
A digital readout above the display shows the maximum value of jitter for the lines being measured. The Jitter measurement can use any video signal as input. Figure 2–33: Jitter display 2–59 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 77: Jitter Menu
Rescale sets the expansion factor of the display to an appropriate scaling factor for the Jitter measurement display graticule. The x- and y-axes adjust to accommodate the rescaled display. 2–60 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 78: Jitter Long_Time
(in s or ns, depending on the scale of jitter) on the y-axis and time (in seconds) on the x-axis. The Jitter Long_Time measurement can use any video signal as input. 2–61 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 79: Jitter Long_Time Menu
Spectrum shows the spectrum of the jitter waveform, Display using an FFT with a Hanning window. Jitter displays the “rolled” jitter waveform. Waveform 2–62 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 80: Figure 2-37: Jitter Long_Time Menu Tree
Cursor 1 or 2, as appropriate. The 1/2 On cursor appears in the position it was in the last time it was active. Cursor enables the knob to move Cursor 1 or 2, 1/2 Active as appropriate. 2–63 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 81: K_Factor
K_Factor top level menu (see Figure 2–38). Figure 2–39 shows the menu tree. The K_Factor measurement can produce different results if the test signal is severely distorted due to the way it aligns the 2T pulse to the measurement graticule. 2–64 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 82: Figure 2-39: K_Factor Menu Tree
Figure 2–40. A second example is if the waveform has ringing that hits the reference point with positive or negative ringing. In this case, the waveform may not look aligned to the application. 2–65 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 83: Figure 2-40: K_Factor Measurement Right Reference Clamped
Graticule provides soft keys to control the graticule gain and tracking of the current graticule, and to change from a standard graticule to a user-created graticule. 2–66 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 84 The default gain is 5.0%. Graticule Track turns on graticule tracking mode. When graticule tracking is on, the size of the graticule tracks the actual waveform. 2–67 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 85 Area 4 is the center area of the graticule. Area 5 is from the center area to the end area of the graticule. Area 6 is the left and right end areas of the graticule. 2–68 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 86 Bar Top allows you to choose the bar top location in Default the signal by rotating the knob. The VM700T finds the exact center, but this location can be reset if desired by rotating the knob. Ref. Pos. allows you to choose the reference Default location of the blanking level in the signal by rotating the knob.
Page 87: Defining Your Own Graticule
Graticule soft keys, should be visible but not highlighted on the screen. To change the shape of the upper or lower graticule, touch the corresponding soft key. This displays three editable lines of equations (see Figure 2–42). 2–70 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 88: Figure 2–42: Make Graticule Display With Lower Graticule Selected
“Set to 0.0” soft key is displayed.) To set the value of the coefficient, turn the knob or touch one of the soft keys. The effect of the change on the graticule is shown immediately. 2–71 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 89 Graticule Gain soft key of the Graticule submenu. To adjust the gain, highlight the soft key, turn the knob until the desired gain value is displayed, then touch the soft key again. 2–72 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 90: Level Meter
Display Limits soft key, and the measurement points on a waveform are quickly selectable using the menu choices under the Measure Position soft key. Figure 2–43: Level Meter display 2–73 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 91: Level Meter Menu
2–74 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 92: Figure 2–45: Display Limits Menu Showing Undefined Measurement Points
(b–a/reference) in percent relative to a reference, or cursor position with respect to zero. You can also select the number of cycles over which the measurement is made for each cursor. 2–75 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 93: Figure 2–46: Measure Position Display For Locating The Measurement Points On A Signal
Max and Min display limits to new values, using Rescale will adjust the display for the optimum resolution using those new limits. Figure 2–46: Measure Position display for locating the measurement points on a signal 2–76 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 94 The reference pointer pushes the maximum and minimum display limit markers if the reference pointer setting is moved past the set display limits. 2–77 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 95 The default is 3 cycles. This setting is associated with the selected cursor, and the horizontal size of the cursor box changes as the number in the soft key box is changed to indicate the measurement area on the displayed waveform. 2–78 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 96: Figure 2–47: Display Position Display Showing Absolute Measurement Referenced To 714 Mv As 100%
DC Cpl. ABS. Meas. Figure 2–47: Display Position display showing absolute measurement referenced to 714 mV as 100% 2–79 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 97: Figure 2–48: Level Meter Display As A Result Of The Setup Shown In Figure 2–47
When Block mode is on, a readout line near the top of the display gives the start, step, and stop lines for the acquired block. 2–80 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 98: Setting Up A New Measurement Window
Select the Min soft key and press the Set Min to –nn% soft key that appears. Select the Max soft key and press the Set Max to nn% soft key that appears. Press the Menu button to return to the first level menu and press Rescale. 2–81 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 99 Level meter measures the amplitude difference between two points on a television signal and displays the result in an easy-to-read bar graph. Examples of levels that can be monitored are the sync amplitude and peak-to-peak amplitude. 2–82 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 100: Line Frequency
Figure 2–49: Line Frequency display Line Frequency Menu Pressing the Menu button when the Line Frequency measurement runs displays the Line Frequency menu (Figure 2–50). Main Menu Average Rescale Figure 2–50: Line Frequency menu tree 2–83 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 101 Rescale sets the expansion factor of the display to an appropriate scaling factor for the Line Frequency measurement display graticule. The x- and y-axes adjust to accommodate the rescaled display. 2–84 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 102: Luminance Nonlinearity
Figure 2–51: Luminance NonLinearity display 2–85 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 103: Luminance Nonlinearity Menu
Reference select the reference to use for comparison in the measurement. When a stored reference is selected, the currently measured value is compared to the stored reference value. 2–86 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 104 Luminance NonLinearity special position display. +V Phase measures only the +V phase part of the signal. Only –V Phase measures only the –V phase part of the signal. Only 2–87 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 105 When deselected, other soft keys (described below) appear to allow you to set measurement locations manually. NOTE. If severe luminance nonlinear distortion is present, the VM700T may not be able to resolve all the steps that were present in the original signal. In such cases, you must use manual positioning to set the location of each staircase step.
Page 106: Figure 2–53: Luminance Nonlinearity Special Position Display
Measure Mode Figure 2–53: Luminance NonLinearity special position display 2–89 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 107: Multiburst
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. 2–90 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 108: Figure 2–55: Multiburst Menu Tree
0dB reference position by rotating the knob and sets the 0dB reference scale for the percentage of the flag amplitude. Acquire displays the Acquire submenu that controls how the signal is acquired for the MultiBurst measurement. 2–91 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 109 0dB reference position by rotating the knob. Displays either a packet number or Flag. Flag (Auto) sets the 0dB reference scale for the percentage of the flag amplitude. 2–92 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 110: Figure 2–56: Multiburst Special Position Display
The default number of Block Lines to average is 3. Block Step sets the number of lines to step in the block. The default number of lines to step is 2. Figure 2–56: MultiBurst special position display 2–93 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 111 5.0 s. Center sets the center location of the packet. Default Width sets the measurement area of the packet. Default Exit leaves the Special Position submenu and displays the MultiBurst screen. 2–94 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 112: Noise Spectrum
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. 2–95 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 113: Figure 2–58: Noise Spectrum Menu Tree
Relative to Reference Reference submenu which selects the reference to use for compensation in the measurement. When a stored reference is selected, the currently measured value is compared to the stored reference value. 2–96 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 114 Reference reference to which measured values are compared. If no reference value has been stored, touching either soft key displays a message that the reference is not defined. 2–97 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 115 Noise Spectrum measurement. Area Pos controls the position of the signal area nn.n Sec used for the Noise Spectrum measurement. Exit leaves the Input Gate menu and returns to the Noise Spectrum display. 2–98 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 116: Figure 2–59: Noise Spectrum Input Gate Display
The Low Pass 6.0 MHz filter remains selected either until you touch the Low Pass 5.0 MHz soft key again and turn the knob counterclockwise or until the VM700T is powered off. 2–99 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 117 Noise Spectrum measurement to be taken on a ramp signal. NOTE. The noise follow might be slightly higher because the auto gain increase is limited by the larger peak-to-peak amplitude of the signal. 2–100 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 118: Sch_Phase
Burst Relative 1 s sync relative timing window Phase difference Sync Relative Timing difference 50% point of sync leading edge Dual SCH_Phase relative channel Figure 2–60: Timing relationships for Dual SCH_Phase measurements 2–101 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 119: Sch Phase Measurement
These two readouts show the phase difference between the source and reference channel burst and the sync timing difference between the source and reference channel sync. 2–102 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 120: Sch_Phase Menu
Pressing the Menu button displays the SCH_Phase menu (Figure 2–63) used to make operational choices for the type of display and reference channel selections. In each case, the source channel remains the one that is selected by the A/B/C SOURCE buttons. 2–103 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 121: Figure 2–63: Sch_Phase Menu Tree
If they appear on different sides, the source and reference channel have different colour frame timing. 2–104 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 122: Figure 2–64: Sch_Phase Full Field Display
Figure 2–64: SCH_Phase full field display Figure 2–64 shows the SCH_Phase full-field display and Figure 2–65 shows the expanded display obtained with the Rescale soft key. 2–105 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 123: Figure 2–65: Rescaled Sch_Phase Full Field Display
The x- and y-axes adjust to accommodate the rescaled display. The x-axis will scale to produce a signal display that will fill about 50% of the display area. Figure 2–65: Rescaled SCH_Phase full field display 2–106 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 124: Shorttime Distortion
Figure 2–66: ShortTime Distortion display Text readouts on the display show: the name of the measurement (Short Time Distortion) the standard of the signal being measured (PAL) the type of waveform 2–107 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 125: Shorttime Distortion Menu
Rescale sets the expansion factor of the display to an appropriate scaling factor for the measurement display graticule. The x- and y-axes adjust to accommodate the rescaled display. 2–108 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 126: Figure 2–67: Shorttime Distortion Menu Tree
Peak the waveform. Reference enables positioning the dashed cursor from nnn nS –1000 nS to +1000 nS. If the cursors are off, touching this menu selection turns them on. 2–109 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 127 Set to sets the selected variable value to 0. This soft key is only displayed when a coefficient has been selected from one of the three editing lines. 2–110 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 128 When this soft key is highlighted, use the knob to move the Bar Right position. Exit leaves the special position display and returns to the ShortTime Distortion display. 2–111 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 129: Defining Your Own Graticule
The top half of the inner and outer graticule pair (that is, the graticule surrounding the bar-level region) should also display. Any changes made to the top half of the graticules are mirrored in the bottom half. 2–112 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 130: Figure 2–69: Make Graticule Display With Inner Graticule Selected
“Set to 0.0” soft key displays.) To set the value of the coefficient, turn the knob or touch one of the soft keys. The effect of the change on the graticule is shown immediately. 2–113 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 131 5%. You can adjust the gain value with the Graticule Gain soft key of the Graticule submenu. To adjust the gain, highlight the soft key, turn the knob until the desired gain value displays, then touch the soft key again. 2–114 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 132: Twofield
525 points for each. The items displayed are selected by means of the TwoField Menu soft keys; the default is to display sync tip, back porch, and luminance. The TwoField measurement requires a field square wave as input. Figure 2–70: TwoField display 2–115 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 133: Twofield Menu
Set 100% Relative Active Active Track Cursor Relative is displayed when Cursor On is also selected. Set 100% is display when Cursor Relative is also selected. Figure 2–71: TwoField menu tree 2–116 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 134 Couple Clamping mode used by the TwoField measurement. Choices for setting the clamp position to either the sync tip or the backporch are included in the Clamp Couple submenu. 2–117 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 135 Cursor 1/2 displays cursors and causes the knob to Active move cursor 1 or 2. Cursor displays cursors and causes the knob to move Track both cursors. 2–118 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 136: Figure 2–72: Twofield Special Position Display
Sec made. The center tick of the displayed box shows the measure- ment position. Select and turn the knob to change the location from the horizontal sync. 2–119 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 137 Select and turn the knob to change the number of cycles. Peak Luma selects peak luminance level in the active area for the display. Exit leaves the special position display and returns to the TwoField display. 2–120 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 138: V_Blank
Figure 2–75 shows the V_Blank broad pulse display, showing the width, rise time, and fall time of the broad pulse. Figure 2–73: V_Blank full display 2–121 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 139: Figure 2–74: V_Blank Equalizer Pulse Display
Figure 2–75: V_Blank broad pulse display Figure 2–76 shows the V_Blank V-sync display. This is essentially the same as the full V_Blank display, except that the vertical sync area is shown. 2–122 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 140: V_Blank Menu
Average Num soft key to highlight it, rotate the knob until the desired weighting factor appears, then touch the Average Num soft key again. Equalizer displays an equalizer pulse and measures it. Pulse 2–123 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 141 Each field has 11 lines in the display area. Rescale sets the expansion factor of the display to an appropriate scaling factor for the V_Blank measurement display graticule. The x- and y-axes adjust to accommodate the rescaled display. 2–124 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 142: Video Standard
When you press the Measure button and touch the Video Standard soft key, the VM700T recognizes the standard of the incoming signal on the current channel, and then uses the correct Video_Source File for that standard.
Page 143 Measure Mode 2–126 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 144: Auto Mode
Auto Mode...
Page 146: Table 3-1: Auto Mode Measurements
Auto Mode Auto mode of the VM700T performs many industry-standard measurements with great speed and accuracy. To do so, the VM700T selects portions of the video input signal, converts them from analog to digital representation, then analyzes the digitized values to produce numeric measurement results.
Page 147 The Pk-Pk Diff Gain is the sum of the absolute values of these. Peak Diff Gain The greater of the two absolute values as determined in the previous line. 3–2 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 148 This result is brought back into a range of 90 if Bruch Blanking is found, or 45 if Bruch Blanking is not found. 3–3 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 149 Measured as the peak-to-peak amplitude of the most extreme sampled fluctuations of the back porch from black level in the frequency band from 10 Hz to 1000 Hz, expressed as a percentage of bar amplitude. 3–4 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 150: Signal-To-Noise Auto Mode Measurements
S/N and S/N.2. Both types appear in the Auto display and the Auto measurement results file. The VM700T performs S/N measurements by combining the lines being measured, then fast-Fourier transforming and filtering them. In contrast, S/N.2 measurement lines are individually fast-Fourier transformed, the energy spectra are combined, and the result is filtered (there is no S/N.2 Periodic measurement).
Page 151: Table 3-2: Signal-To-Noise Auto Mode Measurements
The measurement bandwidth is limited by a 200 kHz high-pass filter and a 5 MHz low-pass filter, the output of which are then weighted by the unified weighting network specified by the CCIR in Rec. 567. (Rec. 569-2, Sect. 2.15.2.) 3–6 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 152: Appendices
Appendices...
Page 154: Appendix A: Pal Measurement Specifications
The instrument must be in an environment with temperature, altitude, humidity, and vibration within the operating limits described in Appendix A: Specification of the VM700T Video Measurement Set Option 01 (NTSC) and Option 11 (PAL) User Manual. The instrument must have had a warm-up period of at least 20 minutes.
Page 155: Table A-2: Bounce
Absolute Mode Accuracy AM Noise 20 dB to 80 dB 1 dB (20 dB to 60 dB) PM Noise 20 dB to 70 dB 1 dB (20 dB to 60 dB) A–2 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 156: Table A-6: Chrominance Nonlinearity
0.3 dB to 6 MHz 40 dB 2.0 dB 0.6 dB Group Delay to 5 MHz 1.0 s 20 ns 5 ns to 6 MHz 1.0 s 40 ns 10 ns A–3 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 157: Table A-10: Horizontal Blanking
2T Pulse K-Factor 0 to 10% Kf 0.3% –10% to +5% K 0.3% Pulse to Bar Ratio 10% to 125% 0.7% Pulse Half Amplitude Duration (HAD) 100 ns to 500 ns 5 ns A–4 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 158: Table A-15: Level Meter
2.0 dB (–60 dB to –70 dB) (5 MHz Low Pass and Unified Weighting) Chrominance Weighted –20 dB to –80 dB 1.0 dB (–20 dB to –60 dB) Signal-to-Noise 2.0 dB (–60 dB to –70 dB) A–5 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 159: Table A-20: Sch Phase
Field 1 and Field 2, lines 15 through 20. VITS test signals recognized are: GCR 8 Fields Seq. VIRS FCC Multi Burst Pedestal Luminance Bar NTC-7 Combination Sin X/X A–6 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 160: Table A-24: Line Blanking Timing Measurements
Live picture area CCIR Rec. 569 (300 mV nominal) of nominal Sync Amplitude Error +100% to –50% 0.3% Last broad pulse in field CCIR Rec. 569 (with Sound-in-Sync) (300 mV nominal) of nominal A–7 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 161 Difference Burst Quadrature Error Differential Gain 0 to +100% 0.3% CCIR Rec. 569 (Peak and p-p) (0% nominal Differential Phase 0 to 360 CCIR Rec. 569 (Peak and p-p) (0 nominal) A–8 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 162: Table A-28: Frequency Response Measurements
Table A–30: Low Frequency Error Measurement Range Accuracy Standard Low Frequency Error (reported 0% to 25% 0.8% CCIR Rec. 569 (0% nominal) CCIR LF Error 50–550 Hz LF Error 10–1000 Hz LF Error) A–9 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 163: Table A-31: Noise Measurements
61 dB to 70 dB 2.0 dB Table A–32: Incidental Carrier Phase Modulation Measurement Range Accuracy ICPM (requires Zero-Carrier Pulse and the quadrature output of the 0 to 30 demodulator on Channel C) A–10 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 164 Index...
Page 166 Block Mode soft key, 2–6, 2–19, 2–29, 2–35, 2–40, Auto Scan soft key, 2–35, 2–41, 2–88 2–69, 2–88, 2–93, 2–98, 2–111 Average Num soft key, 2–4, 2–15, 2–18, 2–23, 2–27, 2–32, 2–38, 2–45, 2–52, 2–55, 2–60, 2–62, 2–66, Index–1 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 167 Show (1) Reference/Show (2) Reference, 2–28 Block Step, 2–35 Store (1) Reference/Store (2) Reference, 2–28 Special Position, 2–34 Relative to Reference submenu, Use (1) Reference/ Main menu Use (2) Reference, 2–28 Index–2 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 168 Flag (Auto) soft key, 2–92 Block Step, 2–40 Flag Start Default soft key, 2–94 Special Position, 2–40 Flag Width Default soft key, 2–94 V Phase Only, 2–40 Freq. Lock soft key, 2–62 Main menu Index–3 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 169 Rescale, 2–52 +V Phase Only, 2–46 H_Timing measurements, 2–51 Special Position, 2–46 High Pass 100 kHz soft key, 2–99 V Phase Only, 2–46 High Pass 200 kHz soft key, 2–99 Graticule submenu Index–4 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 170 Meas. Line End, 2–60 Level Meter, 2–73 Meas. Line Start, 2–60 Level Meter Main Menu, 2–74 Rescale, 2–60 Limit File, 2–46 Threshold, 2–60 Line Frequency, 2–83 Jitter Long_Time, 2–61 Main menu Main menu Index–5 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 171 Measure Mode selections, 1–1 Reference, 2–45 Measure Position, Level Meter, 2–76 Relative to Reference, 2–46 Measure soft key, 2–56 Special Position, 2–47 Measure Submenu GroupDelay SinX_XAcquire, 2–46 Max % Car, 2–58 Index–6 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 172 –V Phase Only, 2–98 Two Field, Special Position, 2–119 Block Lines, 2–98, 2–111 TwoField Block Mode, 2–98, 2–111 Acquire, 2–117 Block Step, 2–98, 2–111 Clamp Couple, 2–118 Input Gate, 2–98 Cursors, 2–109, 2–118 Index–7 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 173 Polar Graticule, 2–57 Average Num, 2–104 Pul 2 Offs soft key, 2–48, 2–69 Dual SCH Display, 2–104 Pulse 1 Pos soft key, 2–48, 2–69 Full Field, 2–104 Pulse Pos soft key, 2–20 Index–8 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 174 Flag Width Default, 2–94 Area, 2–48 Freq. Lock, 2–62 Area 1, 2–68 Fsc. Trap Filter, 2–100 Area 6, 2–68 Full Field, 2–104 Area Pos, 2–98 Grat Incr, 2–57 Auto Scan, 2–35, 2–41, 2–88 Index–9 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 175 2–91, 2–96 Set Default, 2–111, 2–119 Reference Ch. B, 2–15 Special Position soft key, 2–6, 2–19, 2–28, 2–34, 2–40, Reference Ch. C, 2–16 2–46, 2–69, 2–87, 2–93, 2–111, 2–117 Reference Internal, 2–15 Index–10 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 176 Upper Graticule/Lower Graticule Submenu, Variable Sync Tip soft key, 2–117 AE, 2–68 Sync to Bar Top, 2–3 Upper Graticule/Lower Graticule Submenu, Variable System B/G Curve A/B, 2–46 AE, 2–68 System I, 2–46 Index–11 VM700T Video Measurement Set Option 11 PAL Measurements...
Page 177 V Sync Display soft key, 2–124 V–sync display, V_Blank, 2–122 White soft key, 2–36 V_Blank, 2–121 Main menu Average Num, 2–123 Blanking Display, 2–124 Broad Pulse, 2–124 Zero Set soft key, 2–16 Index–12 VM700T Video Measurement Set Option 11 PAL Measurements...

Tektronix VM700T User Manual

Preface

Getting Started

Measure Mode

Auto Mode

Appendices

Appendix A: PAL Measurement Specifications

Quick Links

Need help?

Questions and answers

Related Manuals for Tektronix VM700T

Summary of Contents for Tektronix VM700T

Table of Contents