Chapter 4. Understanding The Hp E1313/E1413; Advanced Fifo Data Retrieval - HP E1313A Manual

Understanding the HP E1313/E1413

Advanced FIFO Data Retrieval

Chapter 4
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Except where noted, all references to the HP E1413 apply to the HP E1313.
This chapter introduces more advanced SCPI programming procedures for
the HP A/D Scanning Converter and includes programming examples.
Chapter contents include:
•
Advanced FIFO Data Retrieval . . . . . . . . . . . . . . . . . . . . . . . Page 101
•
Controlling Data Conversion and Destination. . . . . . . . . . . . Page 108
•
Understanding Scanning Modes . . . . . . . . . . . . . . . . . . . . . . Page 109
•
Triggering and Scanning Modes . . . . . . . . . . . . . . . . . . . . . . Page 111
•
Synchronizing Multiple Cards . . . . . . . . . . . . . . . . . . . . . . . . Page 115
•
Using Automatic Scan List Sequencing
(List-of-Lists) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 120
•
Using the Status System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 122
•
Updating the Status System and VXIbus Interrupts . . . . . . . . . Page 129
•
HP E1313/E1413 Background Operation . . . . . . . . . . . . . . . Page 130
•
Averaging Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 131
•
Limit Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 133
•
Custom EU Conversion Tables . . . . . . . . . . . . . . . . . . . . . . . Page 136
•
Compensating for System Offsets . . . . . . . . . . . . . . . . . . . . . Page 138
•
Detecting Open Transducers . . . . . . . . . . . . . . . . . . . . . . . . . Page 141
•
Thermocouple Reference Compensation. . . . . . . . . . . . . . . . Page 142
•
More On Autoranging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 144
•
Reducing Settling Waits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 144
The discussion of FIFO data access in Chapter 3 ("Step 10. Retrieving
Data" ) assumed that the number of readings to be transferred from the
HP E1313/E1413 is a known quantity. The
command works well in that situation. This section is applicable when:
•
You do not want the data retrieval section of your program to " need
to know" the total number of readings to be transferred during
scanning. Making the data retrieval section independent of the
configuration section reduces the complexity of your program.
•
You cannot define the total number of readings that will be
transferred. This is very likely when the number of scans to be made
is open-ended (
INITiate:CONTinuous
to ).
INFinite
•
Your system contains several HP E1313/E1413s and your program
must execute as fast as possible to maintain a reading transfer rate
greater than the total reading acquisition rate.
Understanding the HP E1313/E1413
Chapter 4
[SENSe:]DATA:FIFO:PART?
is or
ON TRIGger:COUNt
is set
101