246 6000 Series Oscilloscope User’s Guide
5 Making Measurements
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
X at Max 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 value is being measured.