4.4 Thresholding (Zero-Suppress - ZS1 option)
54 Acqiris SA220P User's Manual
Returned data
For details about data format, please refer to Acquired data format section > Signed left-aligned
16-bit ADC code (page 21).
Digitizer mode only (DGT)
When reading the acquired records, the driver returns:
their amplitude value for the samples complying with user criteria.
a "Zero" defined by ZeroValue (default is -32768) for samples below the defined threshold.
This is the readout mode used by default by the SFP.
Digitizer mode combined with streaming (DGT+CST)
The following are returned to the host application:
the gated-record data
the gate position (referred as gate marker) relative to the first sample where the trigger
occurred
Both are using two different streams as illustrated below.
Figure 4.7 - Data readout structure. The data streamed contains the acquired samples in the region of interest. The
marker stream contains the trigger markers and the gate markers.
The gated-records are streamed successively.
The size of the gated-record depends on the gate length and can differ between successive gated-
records.
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