Marvin Test Solutions GX5280, User Manual

Page: 36 / 50

28 GX5280 User Guide
The external events trigger can be set to one or two levels. In the one level mode, the trigger will be generated after
the external condition has been met with the D or T event mask registers. In the two level mode, the board will wait
for two sequential events to be met before issuing the trigger signal (D first, T second or opposite).
PXI Trigger Bus Line Trigger
Controlled by software the GX5280 can be programmed to trigger on any one of the PXI Trigger Bus Lines. The
programmed selected PXI Trigger Bus Line can then be Enabled/Disabled through software control achieving
additional control over the PXI Trigger Bus event.
Pause Command
The pause command causes the board to change its state to the Pause state and originates from the following
sources:

PC (Software).

External control line

External events line

PXI Trigger Bus Line Pause
PC (Software) Pause
The software Pause originates within the PC. The PC bus Pause command takes effect immediately and overrides
other established trigger conditions.
External Pause
External Pause Control Line
External pause originates from the external pause line. Pulling this line low will cause an immediate pause. The
external pause overrides other pause conditions set to the GT-DIO board.