Keysight Technologies DSO-X 2014A, Руководство пользователя

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Horizontal Controls
2
Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide 51
• Normal — the normal viewing mode for the oscilloscope.
In the Normal time mode, signal events occurring before the trigger are
plotted to the left of the trigger point (
▼
) and signal events after the trigger
plotted to the right of the trigger point.
• XY — XY mode changes the display from a volts-versus-time display to a
volts-versus-volts display. The time base is turned off. Channel 1 amplitude
is plotted on the X-axis and Channel 2 amplitude is plotted on the Y-axis.
You can use XY mode to compare frequency and phase relationships
between two signals. XY mode can also be used with transducers to display
strain versus displacement, flow versus pressure, volts versus current, or
voltage versus frequency.
Use the cursors to make measurements on XY mode waveforms.
For more information about using XY mode for measurements, refer to "XY
Time Mode" on page 51.
• Roll — causes the waveform to move slowly across the screen from right to
left. It only operates on time base settings of 50 ms/div and slower. If the
current time base setting is faster than the 50 ms/div limit, it will be set to
50 ms/div when Roll mode is entered.
In Roll mode there is no trigger. The fixed reference point on the screen is the
right edge of the screen and refers to the current moment in time. Events
that have occurred are scrolled to the left of the reference point. Since there
is no trigger, no pre-trigger information is available.
If you would like to pause the display in Roll mode press the [Single] key. To
clear the display and restart an acquisition in Roll mode, press the [Single]
key again.
Use Roll mode on low-frequency waveforms to yield a display much like a
strip chart recorder. It allows the waveform to roll across the display.
XY Time Mode
The XY time mode converts the oscilloscope from a volts-versus-time display to a
volts-versus-volts display using two input channels. Channel 1 is the X-axis input,
channel 2 is the Y-axis input. You can use various transducers so the display could
show strain versus displacement, flow versus pressure, volts versus current, or
voltage versus frequency.