HP 54710A - Timing Definitions

Timing Definitions
Once the edges and transition points have been defined, timing
measurements are made. Timing measurements are made on the first rising
or falling edge on the display.
•
Rise time = time at the upper threshold
−
time at the lower threshold on
the first rising edge
•
Fall time = time at the lower threshold
−
time at the upper threshold on
the first falling edge
•
Period = If the first edge is rising
then period = mid-threshold crossing of second rising edge
−
mid-threshold crossing of first rising edge
else period = mid-threshold crossing of second falling edge
−
mid-threshold crossing of first falling edge
•
Frequency = 1/period
•
+Width = if first edge is rising
then +width = mid-threshold crossing of first falling edge
−
mid-threshold crossing of first rising edge
else +width = mid-threshold crossing of second falling edge
−
mid-threshold crossing of first rising edge
•
−
Width = if first edge is rising
then
−
width = mid-threshold crossing of second rising edge
−
mid-threshold crossing of first falling edge
else
−
width = mid-threshold crossing of first rising edge
−
mid-threshold crossing of first falling edge
•
Duty Cycle = (+width/period)(100)
Measurements
Timing Definitions
13–16