I played with the ftp option last night which is probably similar to the
email, and think I may know what's going on, provided the AVC760 and
AVC761 are roughly similar.
My ftp images are of all four cameras just like it appears on the screen.
Actually, I think that's actually telling us the answer. I believe you just
get sent what the monitor view is currently showing. So, if you have
it set to view camera one, any motion trip will send camera one,
not because camera one has anything to do with the motion detection,
but because you've selected it for viewing.
My thought last night was that I do remember some 'sequence' option
that cycles through the cameras one by one. If you configured it to
send a lot of images and set the motion detection window just right,
you might be able to get it to send a few snaps of each camera
(full view) each time the motion detection tripped.
I'm not sure there's any way that you can have the focus (monitor view)
automatically changed to the motion detection source, but that's
what you'd want. I'll look over the manual again tonight.
It might be that the sequence option actual does what you want.
If you were insane, you could rig up some logic to detect an alarm using
the output on the back and then send IR commands to the unit to change
screens. (You could use a PDA or ocelot or similar.) The problem there
is that you'd first have to unlock the DVR, switch screens, and then
relock it, and that's real cludgy.
Did you ever manage to get this problem sorted?
I also have an AVC760 and am having exactly the same problem: i.e. irrespective of the channel that triggered the event, the box only ever emails the image off the screen *not* the image that triggered the event.