NI PXI-2557 Triggering
Trigger Input
The following table lists valid trigger inputs for the NI PXI-2557.
| Trigger Input | Software | Hardware |
|---|---|---|
| Immediate | Immediate (NISWITCH_VAL_IMMEDIATE) | N/A |
| TTL0 | TTL0 (NISWITCH_VAL_TTL0) | PXI trigger line 0 |
| TTL1 | TTL1 (NISWITCH_VAL_TTL1) | PXI trigger line 1 |
| TTL2 | TTL2 (NISWITCH_VAL_TTL2) | PXI trigger line 2 |
| TTL3 | TTL3 (NISWITCH_VAL_TTL3) | PXI trigger line 3 |
| TTL4 | TTL4 (NISWITCH_VAL_TTL4) | PXI trigger line 4 |
| TTL5 | TTL5 (NISWITCH_VAL_TTL5) | PXI trigger line 5 |
| TTL6 | TTL6 (NISWITCH_VAL_TTL6) | PXI trigger line 6 |
| TTL7 | TTL7 (NISWITCH_VAL_TTL7) | PXI trigger line 7 |
| Software Trigger | niSwitch Send Software Trigger VI or niSwitch_SendSoftwareTrigger function | N/A |
Scan Advanced Output
The following table lists valid scan advanced outputs for the NI PXI-2557.
| Scan Advanced Output | Software | Hardware |
|---|---|---|
| None | None (NISWITCH_VAL_NONE) | N/A |
| TTL0 | TTL0 (NISWITCH_VAL_TTL0) | PXI trigger line 0 |
| TTL1 | TTL1 (NISWITCH_VAL_TTL1) | PXI trigger line 1 |
| TTL2 | TTL2 (NISWITCH_VAL_TTL2) | PXI trigger line 2 |
| TTL3 | TTL3 (NISWITCH_VAL_TTL3) | PXI trigger line 3 |
| TTL4 | TTL4 (NISWITCH_VAL_TTL4) | PXI trigger line 4 |
| TTL5 | TTL5 (NISWITCH_VAL_TTL5) | PXI trigger line 5 |
| TTL6 | TTL6 (NISWITCH_VAL_TTL6) | PXI trigger line 6 |
| TTL7 | TTL7 (NISWITCH_VAL_TTL7) | PXI trigger line 7 |
Refer to the niSwitch Configure Scan Trigger VI or the niSwitch_ConfigureScanTrigger function for descriptions and values of the trigger inputs and scan advanced outputs.