B+K precision 2510B Series, Руководство пользователя, Страница: 128 / 184

Measure 128
10.1.2 Time Measurements
Time measurements include 11 kinds of time parameters.
Figure 10.4 Time Measurements
Period The time period of the complete waveform cycle. The time is measured between the middle
threshold points of two consecutive, like-polarity edges. A middle threshold crossing must
also travel through the lower and upper threshold levels which eliminates runt pulses. The
X cursors show what portion of the waveform is being measured. The Y cursor shows the
middle threshold point.
Frequency Frequency is defined as 1 / Period .
+ Width The time from the middle threshold of the rising edge to the middle threshold of the next
falling edge.
- Width The time from the middle threshold of the falling edge to the middle threshold of the next
rising edge.
Rise Time Duration of rising ege from 20 to 90 %.
Falling Time The duration of falling edge from 90 to 10 %.
Bwid The time from the first rising edge to the last falling edge, or the first falling edge to the last
rising edge at the 50% corssing.
+ Duty The ratio of positive width to period.
- Duty The ratio of negative width to period.
Delay The time difference between two waveform edges using the specified threshold points of
the waveform.
T@L The tie from the trigger to the first transition at a specific level and slope, include: Current,
Max, Min, Mean, and Std-dev.