188 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
13 Measurements
 
Increasing the lower value beyond the set middle value will 
automatically increase the middle value to be more than the lower 
value. The default lower threshold is 10% or 800 mV.
If threshold Type is set to %, the lower threshold value can be set from 
5% to 93%.
5 Press the Middle softkey; then, turn the Entry knob to set the middle 
measurement 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 Ty pe is set to %, the middle threshold value can be set 
from 6% to 94%.
6 Press the Upper softkey; then, turn the Entry knob to set the upper 
measurement threshold value.
Decreasing the upper value below the set middle value will 
automatically decrease the middle value to be less than the upper value. 
The default upper threshold is 90% or 1.50 V.
• If threshold Ty pe is set to %, the upper threshold value can be set 
from 7% to 95%.
Measurement Window with Zoom Display
When the zoomed time base is displayed, you can choose whether 
measurements are made in the Main window portion of the display or the 
Zoom window portion of the 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, 
turn the Entry knob to select from:
• Auto Select — The measurement is attempted in the lower, Zoom 
window; if it cannot 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.