Keysight Technologies 34450A Programmer's Reference Manual page 13

ASCII String Parameters
ASCII string parameters can contain virtually any set of ASCII characters. A quoted ASCII string parameter
must begin and end with matching quotes; either with a single quote or a double quote. You can include
the quote delimiter as part of the string by typing it twice without any characters in between. The following
command uses a quoted ASCII string parameter:
FUNC < quoted ASCII string >
For example, the following commands select the AC voltage function (double or single quotes are allowed).
FUNC "VOLT:AC"
An unquoted ASCII string parameter does not use quotation marks. The following command uses an
unquoted ASCII string parameter:
CALibration:SECure:CODE < unquoted ASCII string >
For example, the following command uses an unquoted ASCII string to set a new calibration security code
(calibration memory must be unsecured):
CAL:SEC:CODE T3ST_DUT165
Using Device Clear
Device Clear is an IEEE-488 low-level bus message that you can use to return the instrument to a
responsive state. Different programming languages and IEEE-488 interface cards provide access to this
capability through their own unique commands. The status registers, the error queue, and all configuration
states are left unchanged when a Device Clear message is received.
Device Clear performs the following actions:
— If a measurement is in progress, it is aborted.
— The instrument returns to the trigger "idle" state.
— The instrument's input and output buffers are cleared.
— The instrument is prepared to accept a new command string.
The ABORt
Keysight 34450A Programmer's Reference
or FUNC 'VOLT:AC'
command is the recommended method to terminate a measurement.
1 34450A Remote Operation
13