
2-33
IM 701210-05E
Explanation of Functions
2
2.4 Setting Waveform Acquisition Conditions and Display Conditions
Sequential Store Function <Section 7.5>
In the case of the history memory function, the waveform data of each block is updated
in order until the measurement is stopped. However, in the sequential store function,
you specify the waveform acquisition count (number of blocks), and the measurement
stops when the specified count is reached. The updating of the waveform display is
carried out after acquiring the entire waveform data. To acquire waveforms using this
function, set the trigger mode to Single(N). The maximum Single(N) count is equal to N
that is explained in the history memory function. The stored waveform data can be
recalled using the history memory function.
The figure below shows an example when data is sequentially stored 100 times.
Display example when the acquisition count is 100
• Displaying all waveforms
(when all display is
executed)
• Display the newest
waveform (When Selected
Record No. = 0)
• Display the oldest
waveform (When Selected
Record No. = –99)
History Memory Function <Section 11.1>
If the record length is set short on the DL750/DL750P, 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. The record length of a single waveform (one channel
and one acquisition) is the same as the maximum display length. 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
Current display waveform
(Selected Record No. = 0)
Display past waveforms
(set 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 Function” in section 2.7.