Tektronix MDO4054-3, Руководство пользователя

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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 121, Taking Automatic
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.
122 MDO4000 Series Oscilloscopes User Manual