Tektronix VM700T, User Manual

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VM700T Option 01 (NTSC) & Option 11 (PAL) User Manual
3- 1
Waveform Mode
This section describes the capabilities of the VM700T Video Measurement Set as
a waveform monitor and how the user interface controls its operation. It is
divided into three topics:
H Display
features discusses basic characteristics of a Waveform mode display.
H Menu
contains information on all the functions and controls accessed
through the Menu button.
H Select Line
describes the operation of the digital line selection feature.
Display
Figure 3--1 shows a typical Waveform display. Refer to this figure as you read
the descriptions that follow.
The Waveform mode can present a real-time Waveform display (with 30 updates
per second) when a video line or less is displayed. With a greater number of
lines, a very full display, or a display of VITS on the first field in a frame, the
display is slowed slightly from real-time.
For NTSC, the measurement set may display any part of the two frames of two
fields each. Select the frame displayed by selecting Field 1 or Field 2 for frame 1
or Field 3 or Field 4 for frame 2. The default display is both frames. Use the
Select Line menu (discussed later in this section) to move to the desired field
within a frame.
For PAL, the measurement set may display any part of the four frames of an
eight-field color sequence. You can select which frames are displayed in the
Select Line menu; the default is all four frames displayed. There is no implicit
field selection. Again, use the Select Line menu (discussed later in this section)
to move to the desired field within a frame.
The Waveform mode graticule scale tracks as the waveform expands, contracts,
or moves in both the horizontal and vertical directions. This ensures the graticule
scale is always calibrated regardless of the gain (expansion) factor.
The Waveform mode vertical graticule scale is in mV or Volts, depending on the
vertical gain setting.
Waveform
Graticule
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