Measurements and Math Functions 5
InfiniiVision 7000B Series Oscilloscopes User’s Guide 177
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 and in the
softkey menu area.
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 (where frequency is indicated).
In XY horizontal mode, the X cursors display channel 1 values (Volts or
Amps).
The X1 and X2 cursor values for the selected waveform source are
displayed in the softkey menu area.
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).
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