R&S AFQ100A Operating Manual page 362

R&S AFQ100A
IEC/IEEE Bus Messages
Interface messages are transferred on the data lines of the IEC/IEEE bus when the "ATN" control line is
active (LOW). They are used for communication between controller and instruments and can only be
sent by the controller which currently has control of the IEC/IEEE bus.
Universal Commands
The universal commands are encoded 10 - 1F hex. They affect all instruments connected to the bus
without addressing.
Command
DCL
(Device Clear)
IFC
(Interface Clear)
LLO
(Local Lockout)
SPE
(Serial Poll Enable)
SPD
(Serial Poll Disable)
PPU
(Parallel Poll Unconfigure)
Table 8-2 Universal Commands
Addressed Commands
The addressed commands are encoded 00 - 0F hex. They are only effective for instruments addressed
as listeners.
Command
SDC
(Selected Device Clear)
GET
(Group Execute Trigger)
GTL
(Go to Local)
PPC
(Parallel Poll Configure)
Table 8-3 Addressed Commands
1401.3084.32
Visual Basic command
IBCMD (controller%, CHR$(20))
IBSIC (controller%)
IBCMD (controller%, CHR$(17))
IBCMD (controller%, CHR$(24))
IBCMD (controller%, CHR$(25))
IBCMD (controller%, CHR$(21))
VISUAL BASIC Command
IBCLR (device%)
IBTRG (device%)
IBLOC (device%)
IBPPC (device%, data%)
8.5
Hardware Interfaces
Effect on the instrument
Aborts the processing of the commands just received
and sets the command processing software to a
defined initial state. Does not change the instrument
settings..
Resets the interfaces to the default setting.
Locks switchover from remote control to manual
control by means of the front panel keys
Ready for serial poll.
End of serial poll.
End of the parallel-poll state.
Effect on the instrument
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.
Triggers a previously active device function (e.g. a
sweep). The effect of the command is the same as
with that of a pulse at the external trigger signal input.
Transition to the "Local" state (manual control).
Configures instrument for parallel poll. Additionally,
the Visual Basic command executes PPE/PPD.
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