16-2
IM DL850E-01EN
Parameter Search
You can search for history waveforms that do or do not meet specified search parameter conditions.
Waveforms Stored in the Acquisition Memory
Selected Record 28
Selected Record 0
Time Range2
Start Record
End Record
P-P
Time Range1
Source: P-P
Condition: OUT
Waveforms whose P-P value
exceeds the specified range
are detected.
History Waveform Search Range
The search range is from Start Record to End Record.
Search Method
The DL850E/DL850EV starts searching in order from the newest waveform.
Calculation, Cursor Measurement, Automated Measurement, Statistical Processing,
and FFT
You can perform calculations, cursor measurement, automated measurement of waveform parameters, or FFT
analysis on the history waveform that you specified with Selected Record. You can also calculate statistics of
automatically measured values on all history waveforms.
Displaying and Analyzing XY Waveforms
You can display XY waveforms and perform analysis on the history waveform you specified with Selected
Record. If the display mode is set to All, XY waveforms of all history waveforms are displayed.
Display Mode (Display Mode)
Selects how history waveforms are displayed.
• One waveform (1 Record): Only the waveform that corresponds to the selected record number is displayed.
• All waveforms (All Record): All history waveforms from the specified start (Start Record) to stop (End Record)
number are overlaid. All waveforms other than the highlighted one are displayed in an intermediate color.
• Averaged waveform (Average Record): Linear averaging is performed on all history waveforms from the
specified start (Start Record) to stop (End Record) number, and the results are displayed as a single
waveform.
An averaged waveform cannot be displayed for the following history waveforms.
Waveforms with record lengths of 250 kpoint or greater on the standard model, 1 Mpoint or greater on
models with the /M1 option, or 2.5 Mpoint or greater on models with the /M2 option.
Highlighting (Selected Record)
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 and timestamp that correspond to the record number you specify here are highlighted.
Selectable range: 0 to −(the number of waveform acquisitions − 1)
16 Displaying and Searching History Waveforms