Measurements 14
Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide 235
1 From the Measurement Menu, press the Settings softkey; then, press the
Thresholds softkey to set analog channel measurement thresholds.
You can also open the Measurement Threshold Menu by pressing [Analyze] >
Features and then selecting Measurement Thresholds.
2 Press the Source softkey to select the analog channel or math waveform source
for which you want to change measurement thresholds.
Each analog channel and the math waveform can be assigned unique threshold
values.
3 Press the Type softkey to set the measurement threshold to % (percentage of
Top and Base value) or to Absolute (absolute value).
• Percentage thresholds can be set from 5% to 95%.
• The units for absolute threshold for each channel is set in the channel probe
menu.
• When the Source is set to Math: f(t), the threshold Type can only be set to
Percent.
4 Press the Lower softkey; then, turn the Entry knob to set the lower measurement
threshold value.
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%.
Absolute threshold hints
• Absolute thresholds are dependent on channel scaling, probe attenuation, and probe units. Always
set these values first before setting absolute thresholds.
• The minimum and maximum threshold values are limited to on-screen values.
• If any of the absolute threshold values are above or below the minimum or maximum waveform
values, the measurement may not be valid.
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