CMU CMU Base System
1100.4903.12 6.5 E-10
CMU Base System
System Commands
The SYSTem subsystem contains the functions that are not related to instrument performance. The
CMU supports the following SCPI-confirmed SYSTem commands:
SYSTem:ERRor? Error Queue
Response
Parameter description Def. value Default unit FW vers.
-32768 to +32768 and error string
Ex.: -230,"Data corrupt or stale"
Error message 0, "No error" – V1.20
Command description
This command queries the next entry from the error/event queue and deletes it. Positive error numbers are in-
strument-dependent; negative error numbers are reserved by the SCPI standard, see chapter 9. If the error
queue is empty, the error number 0, "No error" is returned.
SYSTem:VERSion? SCPI Version
Response
Parameter description Def. value Default unit FW vers.
YYYY.V
Ex.: 1990.0
SCPI version of CMU – – V1.20
Command description
This command queries the SCPI version number for which the instrument complies. YYYY is the year of SCPI
compliance, V is the version number within the year.
SYSTem:NONVolatile:DISable Disable Non Volatile RAM
Command description FW vers.
This command has no query form. It prevents the CMU from saving measurement settings to the
non volatile ram. This improves the system performance but implies that the current settings will not
be saved for later sessions. Disabling the non volatile ram is recommended on instruments
equipped with an FMR 6 Front Module controller.
Note: There is no way to cancel the effect of the SYSTem:NONVolatile:DISable
command within the current session, even is the CMU is switched to manual
control (Local). To re-enable the non volatile ram, the CMU must be rebooted.
V3.0
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