On power-up, the instrument is always in the manual operating state and can be operated via the front panel controls. The instrument is switched to remote control as soon as it receives a command from the controller. If the instrument is controlled via RSIB or VX 11 interface, the alternative commands @REM and @LOC can be used to switch from manual to remote control and back.
While remote control is active, operation via the front panel is disabled with the exception of two softkeys. The instrument settings are optimized for maximum measurement speed; the display is switched off:
The two softkeys in the remote screen are used to modify or quit the remote state:
Go to Local switches the instrument to local state.
Display On/Off switches the display on or off.
Display
On/Off states
Switching on the display means that the analyzer shows the measurement screen with the current setups, diagram areas and traces without leaving the remote state. In this operating mode, it is possible to observe the screen while a remote control script is executed and the control elements on the front panel are still disabled:
Switching on the display is ideal for program test purposes but tends to slow down the measurement. Therefore it is recommended to switch off the display in real measurement applications where a tested program script is to be executed repeatedly.
The analyzer provides a third display option where the
measurement screen is only updated when this is triggered by a remote
control command; see SYSTem:DISPlay:UPDate
ONCE.
The instrument remains in the remote state until it is reset to the manual state via the GUI or via GPIB bus (see section Return to Manual Operation).
You can create you own keys to replace the two default
softkeys Go to Local and Display On/Off. See Combining
Manual and Remote Control.
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Remote control: |
@REM |
The GPIB address (primary address) of the instrument is factory-set to 20. It can be changed manually in the System menu or via GPIB bus. For remote control, addresses 0 through 30 are permissible. The GPIB address is maintained after a reset of the instrument settings.
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Remote control: |
Return to manual operation can be initiated via the front panel or via remote control.
Manually: Click the Local softkey in the remote screen.
Via GPIB bus: CALL IBLOC(device%)
Via RSIB or VX 11 interface: @LOC and @REM can be used to switch from remote to manual control and back.
Before returning to manual control, command processing must be completed. If this is not the case, the analyzer switches back to remote control immediately.
Returning to manual control by pressing the Local softkey can be disabled by the GPIB Local Lockout Message (LLO; see GPIB Bus Interface, Universal Commands) which is also included in the NI commands SetRWLS (Set Remote With Lockout State) or SendLLO. This prevents unintentional switch-over, i.e. return to manual control is possible via the GPIB bus only.
Returning to manual control via the front panel keys can be enabled again by deactivating the REN control line of the GPIB bus.
