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Cursor Measurements
Reference
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 3-159.
There are two cursor modes:
independent
and
tracking
(see Figure 3-9).
Tracking Mode
Only Selected Cursor
Moves
Both Cursors Move
in Tandem
Independent Mode
Figure 3-9: Cursor 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 non-selected cursor. The readouts differ
depending on whether you are using H Bars or V Bars.
H Bars:
the value after shows the voltage difference between the
cursors. The value after @ shows the voltage of the selected cursor
relative to ground (see Figure 3-10). With the video trigger option, you
can also display the voltage in IRE units.
V Bars:
the value after
shows the time (or frequency) difference be-
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