3.2 Simultaneous acquisition and readout (CST option)
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Acqiris SA230E User's Manual
3.2 Simultaneous acquisition and readout (CST
option)
Overview
The streaming mode (CST) answers the need for simultaneous ADC module acquisition and readout
with triggered acquisitions. Compared with standard acquisition mode, this mode enables longer
acquisition duration, and is dedicated to applications requiring no trigger loss.
Figure 3.3 -
Acquisition sequence using a simultaneous acquisition and readout.
Functional description
The CST option allows the user to readout multiple data streams while the acquisition is still running.
This feature can be used with digitizer mode or averaging mode. This section focuses on the usage of
simultaneous acquisition and readout in digitizer mode . The next section presents the
simultaneous acquisition and readout (AVG & CST) (page 47)
.
In a standard readout mode, acquisition and readout are sequential ; the readout of the data is
performed after the acquisition has stopped. Consequently, the duration of the acquisition is limited by
the ADC module internal buffer memory size.
In CST mode, acquired records are streamed to the host computer while the ADC module is acquiring
the next records. This mode supports acquisitions of triggered records of same length.
Enabling gaps between the triggered records, CST mode allows acquisition over longer periods. There
is not maximum duration of the acquisition. The maximum trigger rate and record size depend on the
readout data throughput.
There is a re-arm time between the records (~ 100 ns).