2-30
IM 701240-01E
History Memory «For procedures, see section 11.1.»
If the record length is set short on the SL1400, the memory is divided into blocks, and
waveform data is saved to the individual blocks each time a trigger occurs. If N
represents the maximum number of blocks determined by the record length, the oldest
waveform data block is cleared when the number of activated triggers exceeds N. If you
stop the measurement, you can recall the waveform data stored in each block and
display the data on the screen. Once the specified number of waveforms have been
stored, you can display any of the waveforms individually or all of them together. This
function is useful when capturing the changes in the waveform over time.
The following figure indicates an example when N = 100.
Holds waveform data of the last 100 triggers
Selected Record No. 0
Selected Record No. –25
Currently displayed waveform
(Selected Record No. = 0)
Displays waveforms before the
currently displayed waveform
(Select the Selected Record
No. in the range of –1 to –99)
You can also search a particular waveform from the past waveforms that are held
(history search function). For details, see “History Search” in section 2.7.
2.4 Setting Waveform Acquisition Conditions and Display Conditions
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