YOKOGAWA DL7440 User Manual

10-31
IM 701450-01E
10
Analyzing and Searching Waveforms
Search Target Waveform
You can select the search target waveform.
DL7440
You can select the target waveform from CH1 to CH4, Math1, and Math2.
DL7480
You can select the target waveform from CH1 to CH8, Math1, and Math2.
Level
You can set the level used to determine whether the polarity of the search target
waveform is high or low. The selectable range is 8 divisions within the screen. The
resolution is 0.01 divisions.
Polarity
You can select the polarity, high or low, used to perform determination.
High
Uses the pulse width of the waveform that is greater than or equal to the specified level
(including the hysteresis condition) in the determination.
Low
Uses the pulse width of the waveform that is less than or equal to the specified level
(including the hysteresis condition) in the determination.
Hysteresis
You can set the hysteresis. The selectable range is 0.3 divisions to 4.0 divisions. The
resolution is 0.1 divisions.
• The interval from the point where the level of the search target waveform passes from
below the specified lower limit of hysteresis to above and including the upper limit of
hysteresis to the point where the level changes from above the specified upper limit of
hysteresis to below and including the lower limit of hysteresis is determined to be the
high pulse width.
• The interval from the point where the level of the search target waveform passes from
above the specified upper limit of hysteresis to below and including the lower limit of
hysteresis to the point where the level changes from below the specified lower limit of
hysteresis to above and including the upper limit of hysteresis is determined to be the
low pulse width.
• When the change in the search target level does not apply to high or low conditions
described above, it is not detected as a high or low pulse width. It is handled as an
area where the search condition is not met.
Level
Upper limit of hysteresis
Lower limit of hysteresis
Detected as a low pulse width.
Detected as a high pulse width.
Not detected as a pulse width.
Determination Time
You can set the time used as a determination reference. The value specified here and the pulse
width detected by the specified search condition are compared, and determination is made as to
whether the result matches the selected type. The selectable range is (1/sample rate) to the
display range. For a description of the sample rate, see appendix 1.
Search Start Point
You can set the search start point. The selectable range is ±5 divisions. The resolution
is 10 divisions÷the display record length. For a description of the display record length,
see appendix 1.
10.4 Searching Waveforms Using the Search and Zoom Function

YOKOGAWA DL7440 Specifications

General

Brand	YOKOGAWA
Model	DL7440
Category	Test Equipment
Language	English