NI PXI-2571 Triggering
- Updated2025-07-01
- 1 minute(s) read
The 2571 can send and receive triggers using synchronous and handshaking modes. This module can recognize trigger pulse widths less than 150 ns by disabling digital filtering.
Trigger Input
The following table lists valid trigger inputs for the measurement complete path on the NI PXI-2571.
| Trigger Input | Terminal Name | Hardware Terminal Used |
|---|---|---|
| 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 Terminals
The following table lists valid scan advanced output terminals for the NI PXI-2571.
| Scan Advanced Output | Terminal Name | Hardware Terminal Used |
|---|---|---|
| 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 description of the trigger input signals and scan advanced output signals.