177
Keysight InfiniiVision HD3-Series Oscilloscopes
User's Guide
13 Markers
To make marker measurements / 178
Marker Examples / 181
Markers are horizontal and vertical markers that indicate X-axis values and Y-axis
values on a selected waveform source. You can use markers to make custom
voltage, time, phase, or ratio measurements on oscilloscope signals.
Marker information is displayed in the Results area.
Markers are not always limited to the visible display. If you set a marker, then pan
and zoom the waveform until the marker is off screen, its value will not be
changed. It will still be there when you return to its original location.
X Markers X markers are vertical dashed lines that adjust horizontally and can be used to
measure time (s), frequency (1/s), phase (°), and ratio (%).
When used with the FFT math function as a source, the X markers indicate
frequency.
The Markers tab/list in the Results pane shows:
• X1 and X2 marker values for the selected waveform source
• ∆X (the difference between X1 and X2)
• 1/∆X
• ∆Y/∆X
Y Markers Y markers are horizontal dashed lines that adjust vertically and can be used to
measure Volts or Amps, dependent on the channel Probe Units setting, or they can
measure ratios (%). When math functions are used as a source, the measurement
units correspond to that math function.
The Y markers adjust vertically and typically indicate values relative to the
waveform's ground point, except for math FFT where the values are relative to
0 dB.
The Markers tab/list in the Results pane shows:
• Y1 and Y2 marker values for the selected waveform source
•
∆Y (the difference between Y1 and Y2)
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