Making Measurements 5
6000 Series Oscilloscope User’s Guide 243
•If threshold Type is set to %, the middle threshold value can
be set from 6% to 94%.
6Press 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 Type is set to %, the upper threshold value can
be set from 7% to 95%.
Time Measur ements
The default lower, middle, and upper measurement thresholds
are 10%, 50%, and 90% between Top and Base values. See “To set
measurement thresholds” on page 241 for other percentage
threshold and absolute value threshold settings.
The following figure shows time measurement points.
FFT measurements
When you make an X at Max or X at Min measurement on a math FFT function,
the resultant units will be in Hertz. No other time related automatic measurement
can be made on the FFT math function. Use the cursors to make other
measurements on FFT.
Period
Fall TimeRise Time
+ Width – Width
Upper
Middle
Lower
Thresholds
Digital channel time measurements
Automatic time measurements Delay, Fall Time, Phase, Rise Time, X at Max, and
X at Min, and are not valid for digital channels on mixed-signal oscilloscopes.