Horizontal Controls 2Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide 53• Normal — the normal viewing mode for the oscilloscope.In the Normal time mode, signal events occurring before the trigger areplotted to the left of the trigger point (▼) and signal events after the triggerplotted to the right of the trigger point.• XY — XY mode changes the display from a volts-versus-time display to avolts-versus-volts display. The time base is turned off. Channel 1 amplitudeis 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 relationshipsbetween two signals. XY mode can also be used with transducers to displaystrain versus displacement, flow versus pressure, volts versus current, orvoltage versus frequency.Use the cursors to make measurements on XY mode waveforms.For more information about using XY mode for measurements, refer to “XYTime Mode" on page 53.• Roll — causes the waveform to move slowly across the screen from right toleft. It only operates on time base settings of 50 ms/div and slower. If thecurrent time base setting is faster than the 50 ms/div limit, it will be set to50 ms/div when Roll mode is entered.In Roll mode there is no trigger. The fixed reference point on the screen is theright edge of the screen and refers to the current moment in time. Eventsthat have occurred are scrolled to the left of the reference point. Since thereis no trigger, no pre-trigger information is available.If you would like to pause the display in Roll mode press the [Single] key. Toclear 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 astrip chart recorder. It allows the waveform to roll across the display.XY Time ModeThe XY time mode converts the oscilloscope from a volts-versus-time display to avolts-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 couldshow strain versus displacement, flow versus pressure, volts versus current, orvoltage versus frequency.
