Measure on sync is not working? Nortek Support June 21, 2019 22:10 Updated Follow Firmware 1.21, dated February 2013, has broken the “measure on sync” feature. The problem has been found and fixed and a new release has been made. Please upgrade to the newest firmware version. Related articles How do I remove the ambiguity velocity/phase wrapping from my data? How much seeding is needed? Comments 0 comments Please sign in to leave a comment.