l
Braces ( { } ) indicate parameters that may be repeated zero or more times. The notation <value>
{,<value>} shows that the first value must be entered, while additional values may be omitted or
may be entered one or more times.
Parameter Types
The SCPI language defines several data formats to be used in commands and queries.
Channel Parameter
The channel parameter <chanlist> is required to address one or more channels as follows:
(@<channel> {,<channel>}) - up to six channels
You can also specify a range of sequential channels as follows:
(@<start_channel>:<end_channel>)
For example, (@2) specifies channel 2 and (@1:3) specifies channels 1 through 3. The channel list,
shown as <chanlist> throughout this document, must be preceded with the @ symbol and must be
enclosed in parentheses (). A maximum of 6 channels may be specified through a combination of single
channels and ranges. Query results are channel list order-sensitive. Results are returned in the order
they are specified in the list.
When adding a <chanlist> to a query, you must include a space character between
the query indicator (?) and the channel list parameter. Otherwise error –103, Invalid
separator will occur.
Numeric Parameters
Commands that require numeric parameters will accept all commonly used decimal representations of
numbers including optional signs, decimal points, and scientific notation. If a command accepts only
certain specific values, the instrument will automatically round the input numeric parameters to the
accepted values. The following command requires a numeric parameter for the voltage value:
[SOURce:]VOLTage 50|MIN|MAX, (@1)
Note that special values for numeric parameters such as MINimum, MAXimum, and INFinity are also
accepted. Instead of selecting a specific value for the voltage parameter, you can substitute MIN to set
the voltage to its minimum allowable value, MAX to set it to its maximum allowable value.
You can also send engineering unit suffixes with numeric parameters (e.g., V for volts, A for amperes,
W for Watts). All parameters values are in base units.
Discrete Parameters
Discrete parameters are used to program settings that have a limited number of values (like
IMMediate, EXTernal, or BUS). They may have a short form and a long form just like command
keywords. You can use upper- or lower-case letters. Query responses will always return the short form
in all upper-case letters. The following command requires a discrete parameter for the Function:
5 SCPI Programming Reference
100 Keysight MP4300 Series Operating and Service Guide
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