9-3
IM DL950-02EN
Note
• After you execute a search on the history waveforms, the only waveforms that are displayed are those
that meet the search conditions. To display all the history waveforms in acquisition memory again, turn
the history waveform search feature off.
• The averaging feature requires a certain amount of acquisition memory. If this is not available, you will
not be able to display the Average Record.
Displaying a List of History Waveforms (List)
2.
Tap
List
, or press the soft key. A list of history waveforms appears.
Date
List of history waveforms
Record number
Timestamp (time reference time information)
Note
Notes on Using the History Feature
• When the acquisition mode is set to Average, you cannot use the history feature.
• If you stop waveform acquisition, even if one complete screen’s worth of waveform data has not been
acquired, the waveform at which the trigger occurred is displayed as a single history waveform.
• You can start waveform acquisition when the History menu is displayed. However, you cannot change
the history feature settings while waveform acquisition is in progress.
• The settings are restricted so that the following relationship is retained: Last record (End Record) ≤
Selected Record ≤ first record (Start Record).
• When you load waveform data from the specified storage device, history waveforms up to that point are
cleared. The loaded waveform data is placed in record number zero. If you load a file containing multiple
history waveforms, the latest waveform is placed in zero, and earlier waveforms are placed in order to
record numbers –1, –2, and so on.
• Computation and automated measurement of waveform parameters are performed on the waveform
of the record number specified by Selected Record. You can analyze old data as long as you do not
overwrite the acquisition memory contents by restarting waveform acquisition. If Display Mode is set to
Average Record, analysis is performed on the averaged waveform.
• History waveforms are cleared when you turn the power off.
9.1 Displaying Waveform History Waveforms