18-2
IM DLM3054-01EN
Display Mode (Mode)
Selects how history waveforms are displayed.
• One: Displays only the waveform of the selected record number
• All: Overlays all selected waveforms. All waveforms except the highlighted waveform are displayed in an
intermediate color.
• Accumulate: Overlays all selected waveforms. The frequency of data occurrence is represented by intensity
(Intensity) or by color (Color).
Average (Average)
Highlights the waveform obtained by taking a linear average of the history waveforms in the range specified
by Start No. and End No. When the display mode is set All, all history waveforms that had been averaged are
overlaid using an intermediate color.
Highlighting (Select No.)
The latest history waveform is assigned the record number zero, and older waveforms are assigned numbers in
descending order (−1, −2, −3, and so on).
The waveform that correspond to the record number you specify here are highlighted.
Selectable range: 0 to −(the number of waveform acquisitions − 1)
You can use the jog shuttle to highlight history waveforms at high speeds. While you control the jog shuttle,
history waveforms in the range corresponding to the speed of progression are collectively highlighted. Repeating
this process, you can ultimately highlight all waveforms. When you stop controlling the jog shuttle, only the
waveform of the record number indicated in Select No. will be highlighted.
Maximum Number of Waveform Acquisitions
(Maximum number of history waveforms that can be stored in the acquisition memory)
The number of history waveforms that can be stored varies depending on the selected record length and the
installed memory options as follows:
Record Length
Number of History Waveforms
No options
(125 Mpoints)
/M1 option
(250 Mpoints)
/M2 option
(500 Mpoints)
1.25 kpoints
20000
50000
100000
12.5 kpoints
2500
5000
10000
125 kpoints
250
500
1000
1.25 Mpoints
25
50
100
2.5 Mpoints
10
25
50
5 Mpoints
5
10
25
12.5 Mpoints
1
5
10
25 Mpoints
1
1
1
2
50 Mpoints
1
1
1
1
1
125 Mpoints
1
1, 2
1
1
1
1
250 Mpoints
−
1
1, 2
1
1
500 Mpoints
−
−
1
1, 2
1 Waveform acquisition operates in Single mode at this record length regardless of the trigger mode
setting.
2
CH2 and CH4 (LOGIC) waveforms cannot be acquired at this record length. Math2 (Ref2) and Math4
(Ref4) are also unavailable.
Display Range (Start/End No.)
Using record numbers, set the range of history waveforms to display when the display mode is set to All or
Accumulate.
Selectable range: 0 to −(the number of waveform acquisitions − 1)
List of Timestamps (List)
Lists the history waveforms’ record numbers, trigger timestamps, and time differences from the previous data
triggers.
The trigger timestamp resolution varies depending on the sample rate.
18 Displaying and Searching History Waveforms