Specifications

Sending the STAT:PRESET will disable all the interrupts from the VT1419A.
Sending the *OPC command will enable the measurement complete interrupt. Once
this interrupt is received and the OPC condition sent to the status system, this
interrupt will be disabled if it was not previously enabled via the
STATUS:OPER/QUES:ENABLE command.
Note for C-SCPI
and SICL
The above description is always true for a downloaded driver. In the C-SCPI driver,
however, the interrupts will only be enabled if cscpi_overlap mode is ON when the
enable command is given. If cscpi_overlap is OFF, the user indicates that interrupts
are not to be enabled. Any subsequent changes to cscpi_overlap will not change
which interrupts are enabled. Only sending *OPC or STAT:OPER/QUES:ENAB
with cscpi_overlap ON will enable interrupts. In addition the user can enable or
disable all interrupts via the SICL calls, iintron() and iintroff().
Creating and Loading Custom EU Conversion Tables
The VT1419A provides for loading custom EU conversion tables. This allows for
the on-board conversion of transducers not otherwise supported by the VT1419A.
Standard EU Operation The EU conversion tables built into the VT1419A are stored in a “library” in the
module’s non-volatile flash memory. When a specific channel is linked to a
standard EU conversion using the [SENSe:]FUNC:¼ command, the module copies
that table from the library to a segment of RAM allocated to the specified channel.
When a single EU conversion is specified for multiple channels, multiple copies of
that conversion table are put in RAM; one copy into each channel’s Table RAM
Segment. The conversion table-per-channel arrangement allows higher speed
scanning since the table is already loaded and ready to use when the channel is
scanned.
Custom EU Operation Custom EU conversion tables are loaded directly into a channel’s Table RAM
Segment using the DIAG:CUST:LIN and DIAG:CUST:PIEC commands. The
DIAG:CUST:¼ commands can specify multiple channels. To “link” custom
conversions to their tables, execute the [SENSe:]FUNC:CUST <range>,(@<ch_list>)
command. Unlike standard EU conversions, the custom EU conversions are already
linked to their channels (tables loaded) before the [SENSe:]FUNC:CUST command is
executed but the command allows the A/D range for these channels to be specified.
NOTE The *RST command clears all channel Table RAM segments. Custom EU
conversion tables must be re-loaded using the DIAG:CUST:¼ commands.
Custom EU Tables The VT1419A uses two types of EU conversion tables, linear and piecewise. The
linear table describes the transducer’s response slope and offset (y=mx+b). The
piecewise conversion table gets its name because it is actually an approximation of
Programming the VT1419A Multifunction
Plus
Creating and Loading Custom EU Conversion Tables
96 Chapter 3
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