Figure 9-3: Vxi–11 Channels Between Instrument And Controller - R&S OSP Operating Manual

R&S OSP
immediate abort of the core channel; the interrupt channel transmits spontaneous
service requests of the instrument. Link setup itself is very complex. For more details
refer to the VXI–11 specification.
Figure 9-3: VXI–11 Channels between Instrument and Controller
The number of controllers that can address an instrument is practically unlimited in the
network. In the instrument, the individual controllers are clearly distinguished. This
distinction continues up to the application level in the controller, i.e. two applications on
a computer are identified by the instrument as two different controllers.
Figure 9-4: Remote control via LAN from Several Controllers
The controllers can lock and unlock the instrument for exclusive access. This governs
access to the instrument from several controllers.
9.1.3.2 VXI-11 Interface Messages
On the Ethernet link, the interface messages are called low–level control messages.
These messages can be used to emulate interface messages of the IEC/IEEE bus.
Command
&ABO
&DCL
&GTL
&GTR
&GET
&LLO
Operating Manual 1505.3896.12 - 14
Effect on the instrument
(Abort) Aborts processing of the commands just received.
(Device Clear) Aborts processing of the commands just received and sets the command
processing software to a defined initial state. Does not change the instrument
setting.
(Go to Local) Transition to the "Local" state (manual control).
(Go to Transition to the "Remote" state (remote control).
Remote)
(Group Triggers a previously active device function (e.g. a sweep). The effect of the
Execute command is the same as with that of a pulse at the external trigger signal
Trigger) input.
(Local Disables switchover from remote control to manual control by means of the
Lockout) front panel keys.
Appendix
Interfaces and Connectors
198