Tektronix 4000 Series, Руководство пользователя

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Analyze Waveform Data
Selecting Automatic Measurements
The following tables list each automatic measurement by category: time or amplitude. (See page 168, Taking Automatic
Measurements .)
Time Measurements
Measurement Description
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.
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.
Delay The time between the mid reference (default 50%) amplitude point of two different waveforms.
See also
Phase .
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.
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.
Tektronix 4000 Series Oscilloscopes User Manual 171