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120 Agilent E1441A SCPI Command Reference
Chapter 3
SYSTem
The SYSTem command subsystem returns error numbers and their associated
messages from the error queue. You can also query the SCPI version to which this
instrument complies.
Subsystem Syntax SYSTem
:ERRor?
:VERSion?
:ERRor?
SYSTem:ERRor? returns the error numbers and corresponding error messages in
the error queue. See Appendix B in this manual for a listing of the error numbers,
messages and descriptions.
Comments • When an error is generated by the function generator, it stores an error number
and corresponding message in the error queue.
• One error is removed from the error queue each time the SYSTem:ERRor?
command is executed. The errors are cleared in a first-in, first-out (FIFO)
order. This means that if several errors are waiting in the queue, each
SYSTem:ERRor? query returns the oldest (not the most recent) error. That
error is then removed from the queue.
• When the error queue is empty, subsequent SYSTem:ERRor? queries return
+0,"No error". To clear all errors from the queue, execute the *CLS
command.
• The error queue has a maximum capacity of 20 errors. If the queue overflows,
the last error is replaced with -350, "Too many errors". No additional errors
are accepted by the queue until space becomes available (until you remove
some of the errors by reading them).
Example Reading the Error Queue
SYST:ERR?
Query the error queue.
enter statement
Enter readings into computer.
:VERSion?
SYSTem:VERSion? returns the SCPI version number to which this instrument
complies.
Comments • The information returned is in the format "YYYY.R" where "YYYY" is the
year and "R" is the revision number within that year.