“random occasional static burst”
Is it random? When you hear a static pop make note of the timecode or a visual cue and roll the tape back and play it again. Does the pop occur in the same exact spot?
Check the audio directly on the deck, isolating each channel and listening for static. If the audio on the deck is clean then swap the audio cables feeding the Nitris DX. If the problem persists you should contact support.
If the audio on the deck contains static, check with the camera man and sound man to track the source of the problem.