EXFO FVA-3150 Variable Attenuator - Manual (Page 107)

Remote Control Commands
Variable Attenuator 101
Specific commands-Quick Reference Command Tree
SYSTem:ERRor?
Description This command returns the next error on the list. The
commands ERR? and LERR? give the same result.
When an error is generated, an error number is sent to the error
list. The error list can be accessed with the commands
SYST:ERR?, ERR?, or LERR?.
Syntax SYST:ERR?
Response See error list and descriptions in Error Messages on page 52.
SYSTem:VERSion?
Description This command returns the FVA-3150 identification string.
Syntax SYST:VERS?
Response “EXFO FVA-3150-XX-XX x.x.x.x” where XX-XX is the current
product model and x.x.x.x is the current product version.
Note The *IDN? and IDN? commands are equivalent to the
SYST:VERS? command. They give the same result.