6-5
IM DLM3054-01EN
• Even if Interpolation or Repetitive Sampling mode is selected, the instrument runs in real-time sampling
mode when the sample rate is less than or equal to 2.5 GS/s. When the instrument is running in
Interpolation or Repetitive Sampling mode, “IntP” or “Rep” appears at the upper right of the screen.
• When the sample rate is at its maximum rate (250 GS/s) in Interpolation or Repetitive Sampling mode, if
you decrease the time axis setting, the display record length is reduced.
• If the trigger mode is set to Single or N Single, the acquisition mode is set to Averaging, and the sampling
mode is set to Repetitive Sampling, the instrument actually runs in Interpolation mode.
• If the trigger mode is set to N Single and the sampling mode is set to Repetitive Sampling, the instrument
actually runs in Interpolation mode.
• Repetitive Sampling mode can only be used when the record length is 1.25 Mpoints or less. If the trigger
source is set to LOGIC, the instrument runs in Interpolation mode.
Waveform Acquisition (RUN/STOP)
When you execute (RUN) waveform acquisition, the instrument stores waveform data to the acquisition memory
and updates the displayed waveforms each time the instrument triggers. The acquisition memory is divided into
many areas based on the specified record length, and the maximum number of acquirable waveforms are stored
in the memory. You can recall past waveforms that are stored in the memory using the history feature when
waveform acquisition is not running.
How the Instrument Operates When the Acquisition Mode Is Set to Averaging
• Averaging stops when you stop acquisition.
• If you execute acquisition again, averaging starts from the beginning.
RUN and STOP Operations during Accumulation
• Accumulation stops when you stop waveform acquisition.
• When you execute acquisition again, the displayed waveforms up to that point are cleared, and accumulation
restarts from the beginning.
The RUN/STOP Key Is Disabled:
• When the instrument is in remote mode.
• When the instrument is printing to a printer, when it is being set up automatically, or when it is accessing a
storage device.
• If you press HISTORY during waveform acquisition, waveform acquisition stops.
• If you change the waveform acquisition conditions and, waveform acquisition, the past data stored in the
acquisition memory is cleared.
• You can use the snapshot feature to retain the displayed waveform on the screen. This feature allows you
to update the display without having to stop waveform acquisition.
• To update the displayed waveform once when the trigger condition is met and then stop waveform
acquisition, press SINGLE.
Acquiring the Waveform Once (SINGLE)
When you execute waveform acquisition (SINGLE) and trigger conditions are met, the instrument updates the
displayed waveform once and stops waveform acquisition. If no triggers occur, the display is not updated.
If no triggers occur, the display is not updated. If TIME/DIV is set to a value that would cause the display to
switch to roll mode (100 ms/div to 500 s/div), roll mode is used until a trigger occurs. When the instrument
triggers, roll mode will stop when it acquires the record length's post-trigger data. This mode is suitable for the
observation of single-shot signals.
6 Waveform Acquisition