Syntax Rules
6 Keysight 3458A Quick Reference Guide
6 Keysight 3458A Quick Reference Guide
Syntax Rules
– Command headers may be entered in upper
or lower case.
– Parameters may be entered in upper case,
lower case, or as a numeric value. Numeric
values can be either integer, floating-point, or
exponential in format. Parameters in
floating-point format are rounded to the
nearest integer if the command requires an
integer. For example, “SUB 2.49” is rounded
down to “SUB 2" and “SUB 2.5” is rounded up
to “SUB 3”.
– Command headers and parameters must be
separated by either a space or a comma.
– You can default a parameter by omitting it or
replacing it with -1 (minus 1). From remote
only, you can use two commas to indicate a
default value.
– The carriage return (cr), line feed (lf),
semicolon (;), or EOI sent concurrent with the
last character indicate the end of message
(command terminator) to the multimeter.
When you send a command from the system
controller in the standard format (e.g.
OUTPUT 722:“TEST”), the controller typically
adds a cr lf to the end of the command. With
its input buffer off (off is the power-on input
buffer mode), the multimeter processes the cr
immediately, but does not process the lf until
the command completes execution. This
means that, because of the lf, the bus is held
and you cannot regain use of the controller
until the multimeter is done executing the
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