Whats your setup? It's hard to tell for sure but i think it is a skip. It would likely have been from loosing digital signal for a sec, deck goes into pause (unless it is locked in "hold") for a second and starts recording again a second later when it gets signal back. I had this happen before and now try to put the deck in hold so that there would be a missing space instead of a skip like that. Then I know it happened and either can fix it or not depending. Is it time for a new coaxial?