Analyze Waveform Data
Selecting Automatic Measurements
The following tables list each automatic measurement by category: time or amplitude. (See p age 190, Ta ki ng A ut om at ic
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 waveform s.
See also Phase.
Rise Time
The time requ ired for the leading edge of the first pulse in the w aveform or gate d region
to rise from the low reference value (default = 10%) to the high reference value (default
= 90%) of the final value.
Fall Time
The time required for the falling edge of the first pulse in the waveform or gated region to fall
from the high reference value (default = 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 percentage . T he duty
cycle is measured on the first cycle in the waveform or gated region.
192 MSO4000 and DPO4000 Series Oscilloscopes User Manual
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