17
Programming Fundamentals
Command Syntax
Command Syntax
A command consists of mnemonics (keywords), parameters and
punctuation. Before you start to program your signal generator,
familiarize yourself with the standard notation of each of them.
Command
Mnemonics
(keywords)
Many commands have both a long and a short form: use either one. (a combination of
the two is not allowed). Consider the :FREQuency command for example:
• Short form :FREQ
• Long form :FREQUENCY
SCPI is not case sensitive, so fREquEncy is just as valid as FREQUENCY, but FREQ and
FREQUENCY are the only valid forms of the FREQuency command.
In this documentation, upper case letters indicate the short form of the keyword. The
lower case letters indicate the long form of the keyword.
Punctuation • A vertical bar "|" dictates a choice of one element from a list. For example: <A>|<B>
indicates that either A or B can be selected, but not both.
• Square brackets "[ ]" indicates that the enclosed items are optional.
• Angle brackets "< >" indicates a variable items to be entered to represent user
choices.
• A question mark "?" after a subsystem command indicates that the command is a
query. The returned information, <value> varies in format according to the type of
the field.
Separator • A colon ":" seperates keywords of different levels. The colon before the root
keyword is usually omitted.
• A space separates a keyword and a parameter, as well as a parameter and a unit.
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