94 N9310A User’s Guide
5 Programming Fundamentals
The colon before the root keyword is usually omitted.
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.
F
o
r example: <A>|<B> indicates t
hat eith
er 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.
• A space separates a keyword and a parameter, as well as a
parameter and a unit.
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