200 Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide14 Measurements4 Press the Lower softkey; then, turn the Entry knob to set the lower measurementthreshold value.Increasing the lower value beyond the set middle value will automaticallyincrease the middle value to be more than the lower value. The default lowerthreshold is 10% or 800 mV.If threshold Type is set to %, the lower threshold value can be set from 5% to93%.5 Press the Middle softkey; then, turn the Entry knob to set the middlemeasurement threshold value.The middle value is bounded by the values set for lower and upper thresholds.The default middle threshold is 50% or 1.20 V.• If threshold Type is set to %, the middle threshold value can be set from 6% to94%.6 Press the Upper softkey; then, turn the Entry knob to set the uppermeasurement threshold value.Decreasing the upper value below the set middle value will automaticallydecrease the middle value to be less than the upper value. The default upperthreshold is 90% or 1.50 V.• If threshold Type is set to %, the upper threshold value can be set from 7% to95%.Measurement Window with Zoom DisplayWhen the zoomed time base is displayed, you can choose whether measurementsare made in the Main window portion of the display or the Zoom window portion ofthe display.1 Press the [Meas] key.2 In the Measurement Menu, press the Settings softkey.3 In the Measurement Settings Menu, press the Meas Window softkey; then, turnthe Entry knob to select from:• Auto Select — The measurement is attempted in the lower, Zoom window; if itcannot be made there, the upper, Main window is used.• Main — The measurement window is the upper, Main window.• Zoom — The measurement window is the lower, Zoom window.
