6 Measurements and Math Functions
214 InfiniiVision Oscilloscopes User’s Guide
Cursor Measurements
Cursors are horizontal and vertical markers that indicate X-axis values (usually time) and
Y-axis values (usually voltage) on a selected waveform source. You can use cursors to
make custom voltage or time measurements on oscilloscope signals, and timing
measurements on digital channels. Cursor information is displayed on the line above the
softkeys.
Cursors are not always limited to the visible display. If you set a cursor, then pan and
zoom the waveform until the cursor is off screen, its value will not be changed. It will still
be there when you return to its original location.
X cursors are vertical dashed lines that adjust horizontally and normally indicate time
relative to the trigger point. When used with the FFT math function as a source, the X
cursors indicate frequency.
The X1 cursor (short-dashed vertical line) and X2 cursor (long-dashed-vertical line) adjust
horizontally and indicate time relative to the trigger point for all sources except math FFT
(frequency is indicated).
In XY horizontal mode, the X cursors display channel 1 values (Volts or Amps).
The cursor values for the selected waveform source are displayed within the X1 and X2
softkeys.
The difference between X1 and X2 (X) and 1/X are displayed on the dedicated line
above the softkeys or in the display area when some menus are selected.
Y cursors are horizontal dashed lines that adjust vertically and normally indicate Volts or
Amps, dependent on the channel Probe Units setting. When math functions are used as
a source, the measurement units correspond to that math function.
The Y1 cursor (short-dashed horizontal line) and Y2 cursor (long-dashed horizontal line)
adjust vertically and indicate values relative to the waveform's ground point, except math
FFT where the values are relative to 0 dB.
In XY horizontal mode, the Y cursors display channel 2 values (Volts or Amps).
The cursor values for the selected waveform source are displayed within the Y1 and Y2
softkeys.
The difference between Y1 and Y2 (Y) is displayed on the dedicated line above the
softkeys or in the display area when some menus are selected.
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