Rohde & Schwarz SMB 100a - Remote Control Via IEC;IEEE Bus

R&S SMB Switchover to Remote Control
1407.0806.32 5.3 E-2
The instrument remains in the REMOTE mode until local control is selected either manually with the
LOCAL
key on the front panel or with the interface command &GTL via the remote-control interface.
Switching from manual operation to remote control and vice versa does not affect the remaining
instrument settings. In the remote control mode, the front-panel keys and an external mouse or
keyboard that may be connected can be disabled with command :SYST:KLOC ON. Menus cannot be
opened in this case and switchover from remote control to manual operation is only possible by means
of a remote-control command. Inadvertent switchover with the
LOCAL key is not possible in this case.
Operation of the LOCAL key alone can be disabled with interface command &LLO.
Remote Control via IEC/IEEE Bus
To be able to control the instrument via the IEC/IEEE bus, instrument and controller must be linked by
an IEC/IEEE-bus cable. An IEC/IEEE-bus card, the card drivers and the program libraries for the
programming language used must be provided in the controller. The controller must address the
instrument with the set IEC/IEEE-bus address. The IEC/IEEE bus address of the instrument is factory-
set to 28. It can be changed manually in the Environment - GPIB menu or via IEC/IEEE bus with
command SYSTem:COMMunicate:GPIB: ADDRess . Addresses 0 to 30 are permissible.
Manually: Setup - Remote - GPIB ...
Via IEC/IEEE bus:
CALL IBFIND("DEV1", generator%)
'Open port to the instrument
CALL IBPAD(generator%, 28)
'Inform controller about old address
CALL IBWRT(generator%, "SYST:COMM:GPIB:ADDR 18")
'Set instrument to new address
CALL IBPAD(generator%, 18)
'Inform controller about new address
Sending the first command starts remote control operation.
Return to manual operation is possible via the front panel or the IEC/IEEE bus.
Manually: ! Press the
LOCAL key.
Notes:
Before the transition, command processing must be completed as
otherwise transition to remote control is performed immediately.
The
LOCAL key can be disabled by the interface message &LLO (see
Section "IEC/IEEE Bus Messages") in order to prevent unintentional
transition. In this case, transition to manual mode is only possible via the
IEC/IEEE bus.
The
LOCAL key can be enabled again by deactivating the REN line of
the IEC/IEEE bus ( (see Section "IEC/IEEE Bus Messages").
Via IEC/IEEE bus:
...
CALL IBLOC(generator%)
'Set instrument to manual operation
...