Keysight E1406A User Manual and SCPI Programing Guide 273GPIB Message Reference Keysight E1406A Command ReferenceGPIB Message ReferenceThis section describes IEEE-488.1 defined messages and their affect oninstruments installed in the mainframe. The examples shown are specifically forHP 9000 Series 200/300 computers using BASIC language. Although anyIEEE-488 controller can send these messages, the syntax may be different fromthat shown here.Device Clear (DCL) or Selected Device Clear (SDC)DCL clears all instruments in the command module servant area. SDC clears aspecific instrument. The purpose of DCL or SDC is to prepare one or moreinstruments to receive and execute commands (usually *RST).DCL or SDC do the following to each instrument:-- Clear the input buffer and output queue.-- Reset the command parser.-- Disable any operation that would prevent *RST from being executed.-- Disable the Operation Complete and Operation Complete Query modes.-- DCL or SDC does not affect:-- Any settings or stored data in the instrument (except the OperationComplete and Operation Complete Query modes).-- Front panel operation.-- Any instrument operation in progress (except as stated above).-- The status byte (except for clearing the Message Available bit as aresult of clearing the output queue).ExampleCLEAR 7 Clear all instruments.CLEAR 70900 Clear the System instrument.Go To Local (GTL)Places an instrument in local state.Comments– Refer to the Local Lockout message later in this chapter for information onhow GTL affects front panel lockout.
