Keithley 2002 User Manual page 147

IEEE-488 Reference
3-24
<NRf> Numeric representation format: This parameter is a number that can be
expressed as an integer (e.g., 8), a real number (e.g., 23.6) or an exponent
(2.3E6). Example:
:SYSTem:KEY 16
<n> Numeric value: A numeric value parameter can consist of an NRf number or
one of the following name parameters; DEFault, MINimum or MAXimum.
When the DEFault parameter is used, the instrument is programmed to the
*RST default value. When the MINimum parameter is used, the instrument
is programmed to the lowest allowable value. When the MAXimum param-
eter is used, the instrument is programmed to the largest allowable value.
Examples:
:TRIGger:TIMer 0.1
:TRIGger:TIMer DEFault
:TRIGger:TIMer MINimum
:TRIGger:TIMer MAXimum
<list> List — Specify one or more switching channels. Examples:
:ROUTe:SCAN (@1:10)
:ROUTe:SCAN (@ 2,4,6)
Angle brackets < >: Angle brackets (<>) are used to denote parameter type. Do not include
the brackets in the program message. For example:
:SOURce:TTL2 <b>
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 sta-
tus. It is identified by the question mark (?) at the end of the fundamental form of the com-
mand. Most commands have a query form. Example:
:TRIGger:TIMer?
Most 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
:TRIGger:TIMer? MINimum
:TRIGger:TIMer? MAXimum
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 =
:SCAN? =
: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-
"Press" NEXT key from over the bus.
Sets timer to 100msec.
Sets timer to 0.1sec.
Sets timer to 1msec.
Sets timer to 999999.999sec.
Specify scan list (1 through 10).
Specify scan list (2, 4 and 6).
Queries the timer interval.
Queries the *RST default value.
Queries the lowest allowable value.
Queries the largest allowable value.
*rst
:scan?
:system:preset