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Cursor Measurements
Reference
3Ć16
NOTE
When cursors measure certain math waveforms, the measurement
may not be of time, frequency, or voltage. Cursor measurement of
those math waveforms that are not of time, frequency, or voltage is
described in Waveform Math, which begins on page 3Ć148.
There are two cursor modes: independent and tracking (see Figure 3Ć9).
Tracking Mode
Only Selected Cursor
Moves
Both Cursors Move
in Tandem
Independent Mode
Figure 3Ć9:ăCursor Modes
In independent mode you move only one cursor at a time using the general
purpose knob. The active, or selected, cursor is a solid line. Press SELECT
to change which cursor is selected.
In tracking mode you normally move both cursors in tandem using the
general purpose knob. The two cursors remain a fixed distance (time or
voltage) from each other. Press SELECT to temporarily suspend cursor
tracking. You can then use the general purpose knob to adjust the distance
of the solid cursor relative to the dashed cursor. A second push toggles the
cursors back to tracking.
The cursor readout shows the absolute location of the selected cursor and
the difference between the selected and nonĆselected cursor. The readouts
differ depending on whether you are using H Bars or V Bars.
H H Bars: the value after D shows the voltage difference between the
cursors. The value after @ shows the voltage of the selected cursor
relative to ground (see Figure 3Ć10). With the video trigger option, you
can also display the voltage in IRE units.
H V Bars: the value after D shows the time (or frequency) difference beĆ
tween the cursors. The value after @ shows the time (frequency) of the
selected cursor relative to the trigger point. With the video trigger option,
you can also display the line number.
Cursor Readouts