Tektronix Keithley 2268 Series, Справочное руководство

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Series 2268 850 Watt DC Power Supplies Reference Manual SCPI Command Reference
2268S-901-01 Rev. A / January 2015 221
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. No units' suffix should be included with the parameter, only support for
defaults units is available. 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.