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IM 701210-05E
2.4 Setting Waveform Acquisition Conditions and Display Conditions
Dual Capture Function <Section 7.6>
This function enables waveform acquisition in low-speed roll mode (main waveform)
along with high-speed waveforms (sub waveform) using a different sampling interval. It
is useful when capturing at high speeds abnormal phenomenon that occurs suddenly
during long-term observation (low-speed sampling). When the waveform data is saved,
the sub waveform is saved along with the main waveform. Likewise, when the main
waveform is loaded, the sub waveform is also loaded. This function is valid when the
acquisition mode is set to normal, envelope, or box average.
In addition, the acquired waveform data can be recalled from a memory different from
the history memory.
Main waveform: Roll mode display
100 MW maximum
10 kW
×
100 screens
(standard model)
100 screens maximum
(standard model)
250 screens maximum
(/M1 model)
500 screens maximum
(/M2 and /M3 models)
Sub waveform: Trigger display
When displayed using the zoom function
Cannot tell how many burst waveforms occurred
When displayed using the Dual Capture
function
Able to observe the occurrence of five
burst waveforms
Main waveform
Observe this phenomenon using the zoom
function (horizontal zoom) and Dual Capture
function (T/div: both 100
µ
s/div)
Sub (high-speed) waveform display frame
Event waveforms
Displays the time when the sub waveform was acquired as an event waveform
Sub waveform acquired here
The dual capture function can be used in the following two trigger modes.
• Auto Mode
For the main waveform, measurement is performed from the time sampling is started
until there is a request to end the sampling. For the sub waveform, up to 100* sets
can be stored. When this number is exceeded, the oldest sub waveforms are deleted
as new ones are stored, so that only the 100* newest sub waveforms are stored at
any given time.
*: 250 sub waveforms on the /M1 model. 500 sub waveforms on the /M2 and /M3 models.
• Log Mode
For the main waveform, the waveform is acquired from the time sampling is started up
to the specified record length. (The acquisition stops also when 10 divisions of
waveform are displayed.) For the sub waveform, up to 100* sets can be stored.
In addition, you can view the past sub waveform data while acquiring the waveform.
*: 250 sub waveforms on the /M1 model. 500 sub waveforms on the /M2 and /M3 models.
Note
If waveforms are acquired exceeding the record length specified on the main side in Auto mode,
there is a possibility that the waveform acquired on the sub side will not exist on the main side.