USB-4431 Analog Output Glitch Error After Starting Generation

Updated Dec 21, 2017

Reported In

Hardware

  • USB-4431

Driver

  • NI-DAQmx 8.9
  • NI-DAQmx 9.0

Issue Details

I am using a USB-4431 DSA device. When I start my analog output task, I am seeing a single glitch in the output somewhere between 5165 and 5218 samples into the generation. 
 

Why am I seeing this glitch? What can I do to fix this?

Solution

This is a known issue with the USB-4431 caused by an FPGA timing subsystem error when used with DAQmx 8.9 and below. This issue was fixed in DAQmx 9.0 and later. See the related links section for the NI-DAQmx driver download page.

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