PXI-5421 PFI Event Pulse

[pveaston]

I have an arbitrary waveform output during which I need to generate an event output on the PFI outputs between user-defined samples.  I thought I had managed this using niFgen "Event Pulse" however this appears limited to a maximum pulse time of 64 samples and I need to generate pulses a lot longer than this.

Any pointers would be much appreciated.

[NIRebecca]

Hi pveaston,

Would Marker Events be suitable? These generate a pulse on a PFI line for a specific offset count from the start of the waveform. The 5421 supports up to 4 Marker events as trigger output.

You can set the pulse width of the Marker Event in clock periods or seconds using the Events:Marker:Pulse:Width Value Property. If you still need to increase the pulse width see How Can I Make the Marker Event Pulse Width Longer in NI-FGEN?

Further info in
Output Triggers and Events section of Advanced Waveform Sequencing and Triggering on Arbitrary Waveform Generators

Events section (p2.81 onwards) in NI PXIe-5450 User Manual (also includes specs on the 5421)

[pveaston · Accepted solution]

Hi and thanks

  The Events:Marker:Pulse:Width Value Property was limited to 64 samples, I have used a script with the marker set to toggle to get the length I required however I now need to work out if I can use a control to vary the marker0 positions within the script.