234 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
14 Measurements
 
The Full Screen measurement interval variation measures the value on all 
displayed data points.
The N Cycles measurement interval variation measures the value on an 
integral number of periods of the displayed signal. If less than three edges 
are present, the measurement shows "No edges".
The X cursors show what interval of the waveform is being measured.
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 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.
T
Negative area
N cycles
Positive area
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.