Universal commands

Universal commands are encoded in the range 10 through 1F hex. They affect all instruments connected to the bus and do not require addressing.

Command

Long term

Effect on the instrument

*) IFC is not a real universal command, it is sent via a separate line; however, it also affects all instruments connected to the bus and does not require addressing

DCL

Device clear

Aborts the processing of the commands received and sets the command processing software to a defined initial state. Does not change the instrument settings.

IFC

Interface clear *)

Resets the interfaces to the default setting.

LLO

Local lockout

The Local softkey is disabled. Manual operation is no longer available until GTL is executed.

SPE

Serial poll enable

Ready for serial poll.

SPD

Serial poll disable

End of serial poll.

PPU

Parallel poll unconfigure

End of the parallel-poll state.