Agilent Technologies InfiniiVision 2000 X-Series User Manual page 187

Changing default thresholds may change measurement results
N O T E
The default lower, middle, and upper threshold values are 10%, 50%, and 90% of the value
between Top and Base. Changing these threshold definitions from the default values may
change the returned measurement results for Average, Delay, Duty Cycle, Fall Time,
Frequency, Overshoot, Period, Phase, Preshoot, Rise Time, +Width, and -Width.
1 From the Measurement Menu, press the Settings softkey; then, press the
2 Press the Source softkey to select the analog channel or math waveform
3 Press the Type softkey to set the measurement threshold to %
Absolute threshold hints
T I P
• Absolute thresholds are dependent on channel scaling, probe attenuation, and probe units.
• 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
4 Press the Lower softkey; then, turn the Entry knob to set the lower
Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide
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.
source for which you want to change measurement thresholds.
Each analog channel and the math waveform can be assigned unique
threshold values.
(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.
Always set these values first before setting absolute thresholds.
values, the measurement may not be valid.
measurement threshold value.
13
Measurements
187