Iwatsu DS-8814, Operation Manual

Page: 84 / 141

65
Measures time difference between rising (falling) edge of the selected
waveform and rising (falling) edge of the selected waveform in the
specified area. The level of the measurement point is relatively specified
by the ratio to the amplitude. When specifying (or setting) the level of
the measurement point by the absolute voltage,
∆
t measurement must
be used.
The following parameters are selectable.
Sets the level at which the waveform data crosses the level as reference
regarding the span between maximum and minimum values of CH1
(CH3) waveform as 100% in the specified area .
The setting range is 10 to 90%.
Selects edge of CH1 (CH3) waveform.
Rise: Uses rising edge.
Fall: Uses falling edge.
The first specified edge in the specified area becomes the skew
measurement start or end point.
Sets the level of CH2 (CH4, CH3) waveform in the same way as for the
CH1 (CH3) level.
Selects the edge of CH2 (CH4, CH3) waveform in the same way as for
the CH1 (CH3) edge.
Skew measurement example (Skew13)
In this example, the time from the CH1 waveform rise to the CH2
waveform fall between two H cursors is measured.
Skew
(SKEW)
CH1-CH2
(Skew12)
CH3-CH4
(Skew34)
CH1-CH3
(Skew13)
100%
0%
100%
0%
CH1 waveform
(e.g. 50%)
Level
Rising edge
Falling edge
5MGY
6QR
6QR
$CUG
$CUG
Point at which waveform
crosses the level is
indicated with a + mark.
CH2 waveform
(e.g. 50%)
Level
CH1 (CH3)
Level
CH 1(CH3)
Edge
CH2 (CH4,CH3)
Level
CH2 (CH4,CH3)
Edge
Select Parameter in the
Measure menu and display
the Skew parameter menu.
Select Edge or Level.
Indicates that this is the
Skew13 parameter menu.