Tektronix, Inc. P6240, User Manual

Page: 164 / 321

Measuring Waveforms with Cursors
3–82
TLS 216 User Manual
Paired cursors measure both vertical parameters (typically volts) and horizontal
parameters (typically time) at once.
Look at Figure 3-38. Note that each of the two paired cursors has a long vertical
bar paired with a short horizontal bar. The short horizontal bars measure vertical
parameters (typically volts). The long vertical bars measure horizontal parame-
ters (typically time or frequency). (See To Interpret Cursor Readouts below for
more information.)
There are two cursor modes: independent and tracking. (See Figure 3-39.)
Tracking Mode
Only Selected Cursor Moves
Both Cursors Move
in Tandem
Independent Mode
Figure 3-39: 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 press toggles the cursors back to tracking.
To Interpret Cursor Readouts
To become familiar with what the cursor readout displays and how it varies with
the cursor type selected, H Bars, V Bars, or Paired, read the following descrip-
tions.
The value after
D
shows the voltage difference between the cursors. The value
after @ shows the voltage of the selected cursor relative to ground.
Cursor Modes
H Bars