Agilent Technologies Infiniium 8000A Programmer's Reference Manual page 233

See Also :SYSTem:SETup command and query. When HEADers and LONGform are ON,
the :SYSTem:SETup command performs the same function as the *LRN? query.
Otherwise, *LRN and SETup are not interchangeable.
*LRN? Returns Prefix to Setup Block
The *LRN query always returns :SYSTem:SETup as a prefix to the setup block.
The :SYSTem:HEADer command has no effect on this response.
Common Commands
*LRN? (Learn)
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