Analyze Waveform or Trace Data
Selecting Automatic Measurements in the Time Domain
The following tables list each automatic measurement by category: time or amplitude. (See page 124,
Measurements in the Time Domain
Time measurements
Measurement
Description
Frequency
The
fi
rst 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.
Period
The time required to complete the
fi
rst cycle in a waveform or gated region. Period is
the reciprocal of frequency and is measured in seconds.
Rise Time
The time required for the leading edge of the
fi
rst pulse in the waveform or gated region
to rise from the low reference value (default = 10%) to the high reference value (default =
90%) of the
fi
nal 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 (default = 90%) to the low reference value (default =
10%) of the
fi
nal value.
Delay
The time between the mid reference (default 50%) amplitude point of two different
waveforms. See also
Phase
.
Phase
The amount of time that one waveform leads or lags another waveform, expressed in
degrees where 360° makes up one waveform cycle. See also
Delay
.
Positive Pulse
Width
The distance (time) between the mid reference (default 50%) amplitude points of a
positive pulse. The measurement is made on the
fi
rst pulse in the waveform or gated
region.
Negative Pulse
Width
The distance (time) between the mid reference (default 50%) amplitude points of a
negative pulse. The measurement is made on the
fi
rst pulse in the waveform or gated
region.
Positive Duty
Cycle
The ratio of the positive pulse width to the signal period expressed as a percentage. The
duty cycle is measured on the
fi
rst cycle in the waveform or gated region.
Negative Duty
Cycle
The ratio of the negative pulse width to the signal period expressed as a percentage.
The duty cycle is measured on the
fi
rst cycle in the waveform or gated region.
Burst Width
The duration of a burst (a series of transient events) and is measured over the entire
waveform or gated region.
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