270 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
15 Measurements
You can either enter the fundamental frequency as a measurement parameter and
have the fundamental frequency and harmonics be tracked manually, or you can
allow the fundamental frequency and harmonics to be tracked automatically,
where the highest peak is assumed to be the fundamental frequency.
When this measurement is tracked with cursors, the cursors show the band
surrounding the fundamental frequency that is being measured (at ±1/4 of the
fundamental frequency).
Measurement Thresholds
Setting measurement thresholds defines the vertical levels where measurements
will be taken on an analog channel or math waveform.
1 From the Measurement Menu, 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 0% to 100%.
Changing default thresholds may change measurement results
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.
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