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196 User Manual
The History Func�on
The history function will continuously record the waveforms of the input channels. The
oscilloscope records input waveform continually when running. When the history memory
is full (reach the maximal frame) the new acquisitions will replace the old acquisitions and
keep the latest acquisitions (FIFO).
To use the History function, the HORIZONTAL Format must be set to YT .
Do the following steps to record and replay a waveform:
1. Press the History button on the front panel to enable the History function.
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If the oscilloscope is running, it will then stop.
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If the oscilloscope is stopped it will remain in the stopped state.
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Press the History or Stop button to turn off the History function.
2. Press the List softkey to turn on or off the list display. The list records the timestamp
of every frame. It is accurate to microseconds.
（
2
）
Press Source softkey to choose the output DUT channel that you require.
（
3
）
Press Save softkey ( Recall softkey) to enable the bode plot save (recall)
function. For the details of save (recall) see Chapter “Save and Recall”.
Figure 113 History
3.
Press the Frame softkey; then turn the Universal Knob to select the acquisition to
display.
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The format of the Frame is A/B; A is the acquisition number that is displaying
on the screen and B is the maximal acquisition number that can be set.