System-Related Commands - Racal Instruments 3151 User Manual

System-Related
Commands
Using The Instrument 3-42
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 returns +0, "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, 3151A ,0,1.0".
The commands:
RESet
*RST
3151 And 3151A User Manual