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10.1.3 Special characters in commands
Char
Meaning
Example
|
|
A vertical stroke between parameters
indicates alternative choices. The effect of
the command is different depending on
which parameter is selected.
Command: TRIGger:SOURce
EXTernal|INTernal|LINE
The choices are external, internal, and
line.
Ex: TRIG:SOURCE INT
is one possible command choice.
A vertical stroke between keywords
indicates identical effects exist for both
keywords. The command functions the
same for either keyword.
Only one of these keywords is used at a
time.
Command: SENSe:BANDwidth|BWIDth:
OFFSet
Two identical commands are:
Ex1: SENSE:BWIDTH:OFFSET
Ex2: SENSE:BAND:OFFSET
[ ]
Keywords in square brackets are optional
when composing the command. These
implied keywords will be executed even if
they are omitted.
Command: [SENSe:]BANDwidth[:RESolu
tion]:AUTO
The following commands are all valid and have
identical effects:
Ex1: bandwidth:auto
Ex2: band:resolution:auto
Ex3: sense:bandwidth:auto
< >
Angle brackets around a word, or words,
indicates they are not to be used literally in
the command. They represent the needed
item.
Command: SENS:FREQ <freq>
In this command example the word
<freq> should be replaced by an actual frequency.
Ex: SENS:FREQ 9.7MHz.
10.1.4 Parameters in commands
There are four basic types of parameters: Booleans, keywords, variables and arbitrary block program data.
OFF|ON|0|1
(Boolean) This is a two state Boolean-type parameter. The numeric value 0 is equivalent to OFF. Any numeric
value other than 0 is equivalent to ON. The numeric values of 0 or 1 are commonly used in the command instead
of OFF or ON. Queries of the parameter always return to a numeric value of 0 or 1.
Keyword
The keywords that are allowed for a particular command are defined in the command syntax description.
UP –parameters value is increasing
DOWN –parameters value is decreasing
Units
Numeric variables may include units. The valid units for a command depend on the variable type being used. See
the following variable descriptions. The indicated default units will be used if no units are sent. Units can follow
the numerical value with, or without, a space.
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