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DESCRIPTION
a
Copy the data to disk for offline analysis. Header is in default format.
b
Copy the data to disk for offline analysis. Additional information about e.g. the experiment, is added
to the header.
c
Header and data is analyzed in real-time and only requested parameters are stored.
Figure 32: Data flow through the system
7.9 Record header
7.9.1
Metadata
The record header contains the information described in
this information to a header and write to disk. The example C-code defines a struct which reads the
header information from the header buffer.
PARAMETER
FORMAT
Record Status
Byte
User ID
Byte
Channel
Byte
Data format
Byte
Serial number
uint32
Record number
uint32
SAMPLE_PERIOD
int32
TIME_STAMP
uint64
RECORD_START
int64
Record length
uint32
General purpose
uint16
vector
Timestamp reset
uint16
Table 4:
Header data.
7.9.2
Record Status
The status parameters indicates if the record was transferred correctly,
Over-range or under-range condition within the data is indicated. Over-range and under-range can
appear at various stages in the signal chain and the result is not easy to predict. A more detailed
description of over-range and under-range is in
19-2302 A
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DESCRIPTION
Over/under range, FIFO fill factor and lost data.
A user-configurable value to identify the ADQ unit.
The channel number.
Information about data.
Serial number of the ADQ digitizer.
The current record number.
Time between two samples in steps of 25 ps.
Timestamp of trigger event in steps of 25 ps.
Time between trigger event and record start in steps of 25 ps.
Length in number of samples of data in record.
Usage varies with option.
Number of times that the timestamp was reset.
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Table
4. Example code is available to pack
Section
7.10.
ADQ8-4X Manual
19-2302 A 2020-09-16
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Table
5.
41(46)
REF
7.9.1
7.9
REF
7.9.2
7.9.3
7.9.5
7.9.5
7.9.4
7.9.6
4.4
4.4
4.4
7.9.8
4.4.2
41(46)
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