Tektronix VM700T, Руководство пользователя

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Waveform Mode
3- 4
VM700T Option 01 (NTSC) & Option 11 (PAL) User Manual
NOTE
. Using the Expand function to change the display gain does not affect the
analog processing of the signal. Signals of up to 4V peak-to-peak may be viewed.
Display and Graticule Intensity. Display and Graticule intensity adjustments are
also made with the control knob. While the Display button is depressed, the
control knob varies the intensity of the waveform, menu information, and any
other text on the display not associated with the graticule. While the Graticule
button is held in, the control knob varies only the intensity of the graticule and
the background text displays.
When Freeze is selected by pressing the Freeze button, the measurement set
acquires consecutive frames of 50 lines each and holds that information in the
display memory. Therefore, it is not possible to scroll through the entire field
when Freeze is selected, only the acquired lines may be displayed.
Menu
Pressing the Menu button while in the Waveform mode displays a row of soft
keys along the bottom of the display. This row of soft keys is known as the
Waveform menu. The entire Waveform mode menu tree is shown in Figure 3--2.
Pressing the Menu button when the measurement set is in Waveform mode
displays the Waveform menu, which is structured as follows:
[1-11] H Display : resets the Waveform display to fit a specified number of lines
[1 to 11] into the display. When possible, it aligns the front porch of the system
line to the left edge of the display, and 0 volts is aligned with the horizontal
reference line. To select the number of lines to display, hold the soft key while
turning the knob.
This choice provides a set of cursors centered on the waveform display. To
position the cursors, move the waveform over the cursor and lock the cursor to
the desired point of the waveform. When cursors are on, the lower part of the
display contains three additional status lines for cursor measurement results.
Pressing the Cursors soft key brings up the following submenu:
Center Left/Right
: centers the left or right vertical cursor on the screen. If the
cursor is locked to the waveform, the two will move together. If the left and right
cursors overlie each other, they appear together as a single dotted line. The
vertical amplitude reference marker positions are reset if the cursor is unlocked.
Freeze
Cursors
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