HDO6000 High Definition Oscilloscope
ps (125 GS/s) apart. The process of acquiring these bins and satisfying the time constraint is a random
one. The relative time between ADC sampling instants and the event trigger provides the necessary
variation.
The instrument requires multiple triggers to complete an acquisition. The number depends on the sample
rate: the higher the sample rate, the more triggers are required. It then interleaves these segments (as
shown in the following illustration) to provide a waveform covering a time interval that is a multiple of the
maximum single-shot sampling rate. However, the real-time interval over which the instrument collects
the waveform data is much longer, and depends on the trigger rate and the amount of interleaving
required.
Interleaving of sample in RIS sampling mode.
Sequence Sampling Mode
In Sequence Mode, the complete waveform consists of a number of fixed-size segments (see the
instrument specifications at teledynelecroy.com for the limits). The oscilloscope uses the sequence
timebase setting to determine the capture duration of each segment as 10 x time/div. With this setting,
the oscilloscope uses the desired number of segments, maximum segment length, and total available
memory to determine the actual number of samples or segments, and time or points.
Sequence Mode is ideal when capturing many fast pulses in quick succession or when capturing few
events separated by long time periods. The instrument can capture complicated sequences of events
over large time intervals in fine detail, while ignoring the uninteresting periods between the events. You
can also make time measurements between events on selected segments using the full precision of the
acquisition timebase.
Capturing segments in Sequence sampling mode.
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922499 Rev B
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