6: SCPI command reference Model 2450 Interactive SourceMeter® Instrument
6-30 2450-901-01 Rev. B/September 2013
:FORMat[:DATA]
This command selects the data format that is used when transferring readings over the remote interface.
Type Affected by Where saved Default value
Command and query
Recall settings
Instrument reset
Save settings ASC
Usage
:FORMat[:DATA] <type>
:FORMat[:DATA] REAL
:FORMat[:DATA]?
The data format, which can be one of the following:
• ASCII format: ASCii
• IEEE Std. 754 double-precision format: REAL
• IEEE Std. 754 single-precision format:
Details
This command affects the output of READ?, FETCh?, MEASure:<function>?, and TRACe:DATA queries over
a remote interface. All other queries are returned in the ASCII format.
The Model 2450 only responds to input commands using the ASCII format, regardless of the data
format that is selected for output strings.
The IEEE Std 754 binary formats use four bytes for single-precision values and eight bytes for double-precision
values.
When data is written with any of the binary formats, the response message starts with “#0” and ends with a new
line. When data is written with the ASCII format, elements are separated with a comma and space.
If you set this to REAL or SREAL, you will have fewer options for buffer elements with the TRACe:DATA?, READ?,
MEASURE:<function>?, and FETCh? commands. If you request one of the buffer elements, you will see the
error 1133, "Parameter 4, Syntax error, expected valid name parameters."
Example
Set the format to double-precision format.
Also see
:TRACe:DATA? (on page 6-109)
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