YOKOGAWA DL7440 User Manual

10-26 IM 701450-01E
Hysteresis
You can set the hysteresis. The selectable range is 0.3 divisions to 4.0 divisions. The
resolution is 0.1 divisions.
• When the level of the search target waveform changes from below the specified lower
limit of hysteresis to above and including the upper limit of hysteresis, it is detected as
a rising edge.
• When the level of the search target waveform changes from above the specified
upper limit of hysteresis to below and including the lower limit of hysteresis, it is
detected as a falling edge.
• For all other cases, it is not detected as an edge.
Detection Count
• You can set the edge detection count. The selectable range is 1 to 1000000.
• If the search is aborted in the middle of the operation and the next search is resumed,
the rising or falling edge of the previous detection position is counted as the 1
st
edge
detection count.
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.
Edge Search Example
Level
Search start point
Display frame
Detection position
Upper limit of hysteresis
This rising slope is not counted as an edge.
When the edge is set to rising and the detection count is set to 2
Lower limit of hysteresis
Search Conditions of Serial Patterns
The following conditions can be specified.
Clock Channel
Detects the status pattern in sync with the selected clock signal (clock channel).
DL7440
You can select from CH1 to CH4, and None.
DL7480
You can select from CH1 to CH8, and None.
• When the Clock Channel Is Set to None
Detection Interval
You can set the interval for detecting the pattern.
• When the Clock Channel Is Set to CH1 to CH8/4
You can set the detection level, slope, and hysteresis of the selected synchronization
clock signal.
• Level
You can set the level for detecting the synchronization clock. The selectable range
is 8 divisions within the screen. The resolution is 0.01 divisions.
10.4 Searching Waveforms Using the Search and Zoom Function

YOKOGAWA DL7440 Specifications

General

Brand	YOKOGAWA
Model	DL7440
Category	Test Equipment
Language	English