User`s guide

Remarks
Specify "34401A" for <compatibility> to select 34401A maximum
compatibility mode. In this mode, the 34410A, 34411A, or L4411A
instrument provides backwards compatibility with the SCPI language used
by the 34401A Multimeter. Refer to the Agilent 34401A Multimeter User's
Guide for a description of the SCPI language for the 34401A. Refer to
Agilent 34401A Compatibility Mode for additional information about SCPI
compatibility in this mode.
Specify "34410A" (34410A only), "34411A" (34411A only), or "L4411A"
(L4411A only) for <compatibility> to return the instrument to its native
SCPI mode. In its native mode, the instrument follows the SCPI language
syntax described in this SCPI Command Reference:
The 34410A accepts the "34410A" parameter, and operates as
described in this SCPI Command Reference, except for the additional
"34411A-only" functionality where so identified. The default is
"34410A" for the 34410A instrument.
The 34411A accepts the "34411A" parameter, and operates as
described in this SCPI Command Reference, including the additional
"34411A-only" functionality. The default is "34411A" for the 34411A
instrument.
The L4411A accepts the "L4411A" parameter, and operates as
described in this SCPI Command Reference, including the additional
"34411A-L4411A" functionality. The default is "L4411A" for the
L4411A instrument.
The SYSTem:LANGuage command is, necessarily, available regardless of
the current language compatibility mode selection.
This command has no effect on front-panel operations.
The <compatibility> parameter is stored in non-volatile memory, and does
not change when power has been off, after a Factory Reset (*RST
command), or after an Instrument Preset (SYSTem:PRESet command).