IM 701210-07E
11
History Memory
Section 11.1, “Displaying History Waveforms” in the User’s Manual Part 2
When waveforms are being measured, the waveform data stored in the acquisition memory is displayed as waveforms on the DL750/
DL750P screen. When waveforms are continuously measured, it is impossible to stop the measurement in time when an abnormal
waveform appears (newer waveforms appear on the screen). Normally, past abnormal waveforms cannot be displayed. However, past
waveform data stored in the acquisition memory can be displayed using the history memory function while measurement is stopped. You
can display a specified past waveform data from the data (up to 2000 screens worth) stored in the acquisition memory. In addition, you
can search for waveforms that passed (or did not pass) a specified zone from waveforms stored in the acquisition memory. For details,
see sections 11.2 and 11.3 in the user’s manual.
Waveforms stored in the acquisition
memory
(Up to 2000 screens)
Selected Record No. 0
Selected Record No. –25
Specified zone
Detects the waveform
that passed through the
specified zone.
Selected Record No. -28
Selected Record No. 0
P-P
Detects a waveform
whose P-P exceeds
a specified range
Item Setup : P-P
Condition : OUT
Waveforms stored in the acquisition
memory
(Up to 2000 screens)
Zone
Paramerter
Dual Capture
Section 7.6, “Using the Dual Capture Function” in the User’s Manual Part 1
This function enables trend recording in low-speed roll mode
1
while acquiring data at high speeds. The function is useful when capturing
at high speeds abnormal phenomena that occur suddenly during long-term observations, such as in an endurance test.
You can detect the occurrence of burst waveforms. However, since the time resolution of the measured
data is not high enough, you are unable to determine how many burst waveforms occurred. (T/div: 100
µ
s/div)
Zoom waveform (zooming the time axis)
Sub waveform (dual capture)
Since data can be acquired at high sample
rates (up to 10 MS/s), you can observe 5
incidents of burst waveforms.
(T/div: 100
µ
s/div)
Up to 100 MW*
100 screens maximum
(standard model)
250 screens maximum
(/M1 model)
500 screens maximum
(/M2 and /M3 models)
High speed (sub waveform)
Update mode display (trigger recording)
Low speed (main waveform)
Roll mode display (trend recording)
Up to 10 kW
Enables data acquisition at two
different sample rates on a single unit.
TRIGGER
VERTICAL
HORIZONTAL
Sample rate: 100 kS/s or less
Sample rate: 10 MS/s or less
Main waveform
* Up to 100 MW when the /M3 option is installed. Up to 5 MW on the standard model.
1. If the trigger mode is set to Auto, Auto Level, Single, or Log and the time axis is set between 100 ms/div and 3 day/div, the waveform is
displayed in roll mode. In roll mode, the displayed waveform is not updated on the occurrence of triggers (update mode). Rather, the oldest
data is deleted as new data is acquired, and the waveform is shifted from right to left on the screen.
Summary of Contents for ScopeCorder DL750P
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