Hi John-
Everytime you change batteries or turn the camera(s) off, you will need to re-jam. PLEASE READ THE MANUAL (pg. 134 and 135). It’s more than just plugging in two BNC’s and putting the TC’s on free-run. The cameras have to be set up the same.
If you are going to be doing a lot of shooting with two or more cameras, you really should get something called a “Lockit” box made by Ambient (one for each camera). These boxes boast less than one frame of drift per-day. Mount them on the cameras and keep them plugged in. Of course, you should still re-jam every few hours or so, anyway…just to be safe.
Regards,
Dave