How close to the end of the tape does the DVX trigger the external VTR. I was filming a concert, and the DVX was warning tape end at 0 minutes, and it hadnt triggered the external VTR ( my sony trv 70, and yes the DVX can controll it ive dubbed to the TRV) so i triggered recording manually. it worked fine, no big deal, but i was just wondering if it would have done it automatically at say 30sec till tape end, or 15 sec.