3.4 Optional Subsystems
Some subsystems can be specified as optional, if omission of such a subsystem
will not lead to ambiguity. This means that the subsystem can be omitted in
command line. The optional subsystems are bracketed ("[]"). For example, if full
command specification is written as:
SOURce:POWer[:LEVel]:SLOPe[:DATA]
subsystems LEVel and DATA are optional. Therefore the both commands are valid:
SOURce:POWer:LEVel:SLOPe:DATA
SOURce:POWer:SLOPe
3.5 Long and Short Formats
Each keyword in a command specification has a long format and a short format.
The short format of a command is indicated by capital letters. For example, a
command specification:
SENSe:FREQuency:CENTer
can be written as:
SENS:FREQ:CENT
SENS:FREQ:CENTer
Only long or short form of each keyword is acceptable. For example, the following
specification is incorrect:
:SENS:FREQuen:CEN
3.6 Case Sensitivity
The commands are not case sensitive. Upper case and lower case letters are only
used to indicate the long and short formats of a command specification. For
example, the following commands are equivalent:
SENS:FREQ:STAR
sens:freq:star
3.7 Parameters
The commands can have parameters. The parameters are separated from the
command by a space. If a command has several parameters, they are separated by
commas (',').
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