NI 5412/5421/5422/5441/5442
Trigger Sources
Trigger sources are software selectable. You can use any of the following external input triggers:
- PFI 0 or PFI 1 on the SMB front panel connectors
- PFI 2 or PFI 3 on the DIGITAL DATA & CONTROL front panel connector (except NI 5412 and 5442)
- RTSI<0..7> (PCI) lines or PXI_TRIG<0..7> lines and PXI_STAR (except NI 5442) on the PXI trigger bus on the backplane
The following figure shows the possible trigger sources for the NI 5412/5421/5422/5441/5442.
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§Refer to Exporting Signals for more information routing signals.
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Notes The male VHDCI (Digital Data & Control) connector is not available on the NI 5412, the NI 5421/5422 with the 8 MB memory option, or the NI 5442. |
| The PXI_STAR trigger line is not a valid trigger source on the NI 5442. |
External triggers are only recognized on the rising edge of the trigger. All triggers are ignored until you call the niFgen Initiate Generation VI or the niFgen_InitiateGeneration function.
The default trigger source for NI-FGEN is Immediate, which causes an automatic Start trigger pulse to be generated internally as soon as hardware can generate signals after generation has been initiated. You can configure the trigger source with niFgen Configure Trigger VI or the niFgen_ConfigureTriggerSource function. Refer to the niFgen Send Software Edge Trigger VI or the niFgen_SendSoftwareEdgeTrigger function for more information about programmatically triggering the device.
Refer to the device specifications for the minimum Start trigger pulse width required for operation.