Structure Of A Command Line; Optional Keywords; Long And Short Form; Parameter - Rohde & Schwarz PR100 Manual

R&S PR100
DISPlay:WINDow:CATalog?
List all available display modes.

Optional keywords

Some command systems permit certain keywords to be optionally inserted
into a command or omitted. These keywords are marked by square brackets
in the description. Some commands are considerably shortened by these
optional keywords, although the full command length is also recognized by the
device.
Example:
Command description:
Full command:
Shortened command:
Note: An optional keyword must not be omitted if its effect is specified in detail
by a numeric suffix.

Long and short form

The keywords can be of a long form or a short form. Either the short form or
the long form can be entered, other abbreviations are not permissible.
Example:
Long form: STATus:QUEStionable:ENABle 1
Short form: STAT:QUES:ENAB 1
Note: The short form is marked by upper-case letters, the long form
corresponds to the complete word. Upper-case and lower-case notation only
serve the human reader, the device itself does not make any difference
between upper- and lower-case letters.

Parameter

The parameter must be separated from the header by a "white space". If
several parameters are specified in a command, they are separated by a
comma ",". A few queries permit the parameters MINimum, MAXimum and
DEFault to be entered. For a description of the types of parameter, refer to
"Parameters" in Section 9.1.5.
Example:
DISPlay:BRIGhtness? MAXimum
This query requests the maximal value for the display backlight.
Numeric Suffix
If a device features several functions or characteristics of the same kind, the
desired function can be selected by a suffix added to the command. Entries
without suffix are interpreted like entries with the suffix 1.

9.1.3 Structure of a command line

Several commands in a line are separated by a semicolon ";". If the next
command belongs to a different command system, the semicolon is followed
by a colon.
Example:
DISPlay:BRIGhtness MAXimum;:SYSTem:AUDio:VOLume MAXimum
FORMat[:DATA] ASCii
FORMat ASCii
FORM ASC
Response: 1.00
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