5-31
The <b> indicates that a Boolean type parameter is required. Thus, to set digital input line
#2 true, you must send the command with the ON or 1 parameter as follows:
:SOURce:TTL2 ON or :SOURce:TTL2 1
2.
Query commands:
This type of command requests (queries) the currently programmed
status. It is identified by the question mark (?) at the end of the fundamental form of the
command. Most commands have a query form. Examples:
*OPT?
Common query command.
:TRIGger:TIMer?
SCPI query command.
All commands that require a numeric parameter (<n>) can also use the DEFault, MINi-
mum, and MAXimum parameters for the query form. These query forms are used to deter-
mine the *RST default value, and the upper and lower limits for the fundamental command.
Examples:
:TRIGger:TIMer? DEFault
Queries the *RST default value.
:TRIGger:TIMer? MINimum
Queries the lowest allowable value.
:TRIGger:TIMer? MAXimum
Queries the largest allowable value.
3.
Case sensitivity:
Common commands and SCPI commands are not case sensitive. You can
use upper or lower case, and any case combination. Examples:
*RST
=
*rst
:SCAN?
=
:scan?
:SYSTem:PRESet
=
:system:preset
4.
Long-form and short-form versions:
A SCPI command word can be sent in its long-form
or short-form version. The command subsystem tables in this section provide the com-
mands in the long-form version. However, the short-form version is indicated by upper case
characters. Examples:
:SYSTem:PRESet
Long-form
:SYST:PRES
Short-form
:SYSTem:PRES
Long and short-form combination
Note that each command word must be in long-form or short-form, and not something in
between. For example, :SYSTe:PRESe is illegal and will generate an error. The command
will not be executed.
There are no short-form versions for common commands.
Short-form rules:
The following rules can be used to determine the short-form version of
any SCPI command:
A. If the length of the command word is four letters or less, there is no short-form version.
Examples:
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