Iwatsu DS-8814, Operation Manual

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Measures rise time of waveform in the specified area.
Measures fall time of waveform in the specified area.
Set the following parameters.
Sets a reference waveform amplitude.
If Top-Base is selected, Top and Base are found from a waveform data
histogram and are set as 100%.
If P-P is selected, the span between Max. and Min. of the waveform
data in the specified area is set as 100%.
The measurement end level is set at the Tr and the measurement start
level is set at the Tf. The setting range is 11 to 90%.
The measurement start level is set at the Tr and the measurement end
level is set at the Tf. The setting range is 10 to 89%.
Rise time (Tr)
Fall time (Tf)
Tr
Tf
100%
Upper Level (e.g. 90%)
0% Base
Lower Level (e.g. 10%)
Top
This span is
regarded as
100%.
The point at which the waveform crosses
the level is indicated with a + mark.
100%
Upper
Lower
Amplitude parameter (100%) setting and specification of measurement interval
When a waveform has an overshoot or undershoot as shown in the figure, the
measured value varies depending on Top-Base or P-P selection.
If no area to be measured is specified, the rise (fall) time at the leftmost part of
the screen is measured.
Overshoot
Undershoot
100% in
P-P
100% in
TOP-BASE
If there are several rises (falls) on the
screen, specify the measuring area
with H cursors.
H cursor
H cursor