SCPI Command Reference
Parameter Types
Release 3.0 197
Parameter Types
Several different data types are defined for use in program messages and response
messages.
Boolean
Parameters
Boolean parameters are single binary conditions such as 1 and 0, or ON and OFF.
The following is an example of a command that uses Boolean parameters:
SYST:COMM:GPIB:PONS {ON|OFF|1|0}
Discrete
Parameters
Discrete parameters are used when program settings have a limited number of
values. If you query a discrete parameter, the response will always be in the short
form with all uppercase letters. The following is an example of a command that uses
discrete parameters:
TRIG:SOUR {BUS|EXT|IMM|NONE}
Numeric
Parameters
Numeric parameters are number representations such as decimal points, optional
signs, and scientific notation. Values such as MINimum and MAXimum are
accepted as substitutes for numbers. When DEFault is provided as a parameter, the
machine selects the default value automatically. You can also use engineering unit
suffixes such as, V, A, or W with numeric parameters. In cases where specific
numeric values are accepted, the power unit will round the input parameters. The
following is an example of a command that uses numeric parameters:
VOLT:PROT {<voltage>|MAX|MIN}
String
Parameters
String parameters are used when a series of ASCII characters is required. Strings
must be enclosed within single or double quotations. The beginning and ending
quotation marks must be matching. Quote delimiters may be included in the string
by typing the quotation marks twice without any characters in between. The
following is an example of a command that uses string parameters:
CAL:STAT ON, “0000”
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