Operators Manual Owner manual

Operator's Manual
Cursors
Cursors are markers (lines, cross-hairs, or arrows) that identify specific voltage and time values on the
waveform. Use cursors to make fast, accurate measurements of specific points in the waveform. There
are five, standard cursor types available.
The cursor measurement values can be read on the descriptor box for the trace. The Show buttons let you
change which set of values are shown on the descriptor box. The available selections depend on the type
of cursor.
The easiest way to position cursors is to touch and drag them to the desired locations. Use the Front
Panel Cursors knob or the Position data entry controls at the right side of the Standard Cursors dialog to
place the cursors precisely.
Cursor Types
Standard Cursors
These five cursors can be placed on most any Channel, Memory, Math or Zoom trace.
Horizontal (Time) cursors place vertical lines through a desired point along the horizontal axis to read the
signal's amplitude at the selected time. There are two main types:
l Horizontal Abs - displays a single, dashed, vertical line. The readout shows the absolute value at
the cursor location.
l Horizontal Rel - displays two, dashed, vertical lines. The readout depends on the Show option
selected.
Vertical (Amplitude) cursors place horizontal lines through a point on the vertical axis to read the
amplitude of the signal at that point. The two types are:
l Vertical Abs - displays a single dashed, horizontal line. The readout shows the absolute value at the
cursor location.
l Vertical Rel - displays two dashed, horizontal lines. The readout depends on the Show option
selected.
An option exists to place Both Horizontal (Time) and Vertical (Amplitude) types at once.
Special Cursors
Some cursors are offered only in special circumstances:
l Horizontal (Frequency) cursors look the same as Horizontal (Time) cursors except that they are
placed on waveforms that have frequency on the x-axis, such as FFTs.
l Horizontal (Event) cursors are placed only on Trend waveforms.
In addition, some optional software packages provide cursors and help markers that are specific to the
application.
Cursors on Math Functions
Cursors can be placed on math functions whose X-axis has a dimension other than time, such as an FFT.
When there is at least one math trace open, the Standard Cursors dialog contains an X-Axis control where
you can choose the units measured by the horizontal cursors. The options will be appropriate to the types
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