
WaveSurfer 3000 Oscilloscopes
Determining Rise and Fall Times
Once top and base are estimated, calculation of the rise and fall times is easily done (see figure). The appropriate
threshold levels are automatically determined by the instrument, using the amplitude (ampl) parameter.
Rising Edge Duration
Falling Edge Duration
Where
Mr
is the number of leading edges found,
Mf
the number of trailing edges found,
the time when rising edge
i
crosses the x% level,
and the time when falling edge
i
crosses the x% level.
Determining Time Parameters
Time parameter measurements such as width, period and delay are carried out with respect to the mesial reference level,
located halfway (50%) between the top and base reference lines or with respect to the specified level for @level
parameters.
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Содержание WaveSurfer 3000
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