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Using The Instrument 3-36
System-Related
Commands
System-related commands are used to place the instrument in a
known state, clear the instrument to its defaults, or to query the
generator for its errors or identity. The following is an overview of
the system-related commands.
The query:
SYSTem:ERRor?
reads one error from the error queue. A record of up to 30 errors
can be stored in the generator's error queue. Errors are retrieved in
first-in-first-out (FIFO) order. The first error returned is the first error
that was stored. When all errors have been read from the queue,
the generator r0, "No error".
If more than 30 errors have occurred, the last error stored in the
queue (the most current error) is replaced with -350,"Too many
errors". No additional errors are stored until all errors have been
removed from the queue. The error queue is cleared only when
power is cycled off or after the execution of a *CLS command. The
*RST command does not clear the error queue.
The query:
SYST:ERR
queries the system error queue and returns a string with the
following format: -102,"Syntax error". A complete list of errors that
can be detected by the generator is given in Chapter 4.
The query:
SYSTem:VERSion?
queries the generator to determine the present SCPI revision and
returns a string similar to "1993.0"
The query:
*IDN?
reads the generator's identification string. The generator returns four
fields separated by commas. The first field is the manufacturer's
name, the second field is the model number, the third field is not
used (always "0") and the fourth field is the firmware version
number. The command returns "Racal Instruments,3152,0,1.0".
The commands:
RESet
*RST
reset the generator to its default state. The *RST and RES
commands have no effect on status registers, VXIbus states, VXI
address or SCPI command set.
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