Analyze Waveform Data
Selecting Automatic Measurements
The following tables list each automatic measurement by category: time or amplitude. (See page 155, Taking Auto matic
Measurements.)
Time Measurements
Measurement Description
Period
The time required to complete the first cycle in a waveform or gated region. Period is the
reciprocal of frequency and is measured in seconds.
Frequency
The first cycle in a waveform or gated region. Frequency is the reciprocal of the period; it is
measured in hertz (Hz) where one Hz is one cycle per second.
Delay
The time between the mid reference (default 50%) amplitude point of two different waveforms.
See also Phase.
Rise Time
The time require d for the lead ing edge of the first pulse in the waveform or gated region
to rise from the low reference value (defa u lt = 10%) to the high reference value (default
= 90%) of the final value.
Fall Time
The time required for the falling edge of the fi rst pulse in the waveform or gated region to fall
from the high reference value (d efault = 90%) to the low reference value (default = 10%) of
the final value.
Positive Duty
Cycle
The ratio of the positive pulse width to the signal period expressed as a perce ntage. The duty
cycle is measured on the first cycle in the waveform or gated region.
DPO3000 Series Oscilloscopes User Manua l 157
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