User Manual

104
Time Measurements
Time measurements include 11 kinds of time measurements.
Type
Description
Period
The time between the middle threshold points of two consecutive, like-
polarity edges
Freq
The reciprocal of the period.
+ Width
The time difference between the 50% threshold of a rising edge to the 50%
threshold of the next falling edge of the pulse
- Width
The time difference between the 50% threshold of a falling edge to the 50%
threshold of the next rising edge of the pulse
Rise Time
The time for the signal amplitude to rise from 10% to 90%
Fall Time
The time for the signal amplitude to fall from 90% to 10%
BWidth
The duration of a burst over the entire waveform
+Duty
The ratio of the positive pulse width to the period
-Duty
The ratio of the negative pulse width to the period
Delay
Time from the trigger to the first transition at the 50% crossing
Time@Mid
Time from trigger of each transition at a specific level and slope
Delay Measurements
Delay measurements measure the time difference between two channels. There are 10 kinds of
delay measurements. To measure delay parameters, select the Type softkey in the MEASURE
menu and turn the CH1-CH2 box on (both channels must be displayed on the screen or this
selection will be grayed-out).
Type
Description
Phase
The phase difference between two channels
FRR
The time between the first rising edge of source 1 and the first rising edge
of source 2 at the 50% voltage level
FRF
The time between the first rising edge of source 1 and the first falling edge
of source 2 at the 50% voltage level
FFR
The time between the first falling edge of source 1 and the first rising edge
of source 2 at the 50% voltage level