User manual

RIGOL
© 2008 RIGOL Technologies, Inc.
User‟s Guide for DS1000B Series
2-95
Time Measurements
The DS1000B series oscilloscopes provide 12 kinds timing parameters
auto-measurements; Frequency, Period, Rise Time, Fall Time, +Width, -Width, Delay
A→B , Delay A→B , +Duty and –Duty, Phase A→B ,Phase A→B .
Figure 2-124 shows a pulse with some of the time measurement points.
Figure 2-124 The time parameters
Rise Time: Time that the rising edge of the first pulse in the waveform takes to rise
from 10% to 90% of its amplitude.
Fall Time: Time that the falling edge of the first pulse in the waveform takes to fall
from 90% to 10% of its amplitude.
+Width: The width of the first positive pulse in 50% amplitude points.
-Width: The width of the first negative pulse in the 50% amplitude points.
Delay A→B : The time delays between the channel A and channel B at the rising
edge.
Delay A→B : The time delays between the channel A and channel B at the falling
edge.
Phase A→B : The phase between the channel A and channel B at the rising edge.
Phase=(delay/source A period)×360°
Phase A→B : The phase between the channel A and channel B at the falling edge.
+Duty: +Duty Cycle, defined as +Width/Period
-Duty: -Duty Cycle, defined as -Width/Period.
10%
50%
90%
-Width
+Width
Fall Time
Rise Time