R&S®SML / R&S®SMV03 Interfaces
1090.3123.12 E-6 5.27
Interface Messages
Interface messages are transmitted to the instrument on the data lines, with the ATN (Attention) line
being active LOW. These messages serve for communication between the controller and the
instrument.
Universal Commands
Universal commands are in the code range 10 to 1F hex. They act on all instruments connected to the
bus without addressing them before.
Table 5-6 Universal commands
Command QuickBASIC command Effect on the instrument
DCL (Device Clear) IBCMD (controller%, CHR$(20)) Aborts the processing of the commands just received
and sets the command processing software to a
defined initial state. Does not change the instrument
setting.
IFC (Interface Clear) IBSIC (controller%) Resets the interfaces to the default state.
LLO (Local Lockout) IBCMD (controller%, CHR$(17)) Manual switchover to LOCAL is disabled.
SPE (Serial Poll Enable) IBCMD (controller%, CHR$(24)) Ready for serial poll.
SPD (Serial Poll Disable) IBCMD (controller%, CHR$(25)) End of serial poll.
PPU Parallel Poll Unconfigure) IBCMD (controller%, CHR$(21)) End of parallel polling state.
Addressed Commands
Addressed commands are in the code range 00 to 0F hex. They only act on instruments addressed as
listeners.
Table 5-7 Addressed commands
Command QuickBASIC command Effect on the instrument
SDC (Selected Device Clear) IBCLR (device%) Aborts the processing of the commands just received
and sets the command processing software to a
defined initial state. Does not change the instrument
setting.
GET (Group Execute Trigger) IBTRG (device%) Triggers a previously active instrument function (eg a
sweep). The effect of this command is identical to
that of a pulse at the external trigger signal input.
GTL (Go to Local) IBLOC (device%) Transition to LOCAL state (manual control).
PPC (Parallel Poll Configure) IBPPC (device%, data%) Configures the instrument for parallel polling. The
QuickBASIC command additionally executes PPE /
PPD.
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