Measurements and Math Functions 5
InfiniiVision 7000B Series Oscilloscopes User’s Guide 165
Fall Time
The fall time of a signal is the time difference between the crossing of the
upper threshold and the crossing of the lower threshold for a
negative- going edge. The X cursor shows the edge being measured. For
maximum measurement accuracy, set the sweep speed as fast as possible
while leaving the complete falling edge of the waveform on the display.
The Y cursors show the lower and upper threshold points.
Rise Time
The rise time of a signal is the time difference between the crossing of the
lower threshold and the crossing of the upper threshold for a
positive-going edge. The X cursor shows the edge being measured. For
maximum measurement accuracy, set the sweep speed as fast as possible
while leaving the complete rising edge of the waveform on the display.
The Y cursors show the lower and upper threshold points.
+ Width
+ Width is the time from the middle threshold of the rising edge to the
middle threshold of the next falling edge. The X cursors show the pulse
being measured. The Y cursor shows the middle threshold point.
– Width
– Width is the time from the middle threshold of the falling edge to the
middle threshold of the next rising edge. The X cursors show the pulse
being measured. The Y cursor shows the middle threshold point.
X at Max Y
X at Max Y is the X axis value (usually time) at the first displayed
occurrence of the waveform Maximum, starting from the left-side of the
display. For periodic signals, the position of the maximum may vary
throughout the waveform. The X cursor shows where the current X at Max
Y value is being measured.
To measure the peak of an FFT:
1 Select FFT as the Operator in the Waveform Math Menu.
2 Choose Math: f(t) as the source in the Measurement Menu.
3 Choose Maximum and X at Max Y measurements.
To Next Page
Loading...
Need help?
General
