These are good questions that could use further discussion.
From the V3 manual:
When using the analog outputs and sending the signal to a recorder with a variable input, use
the following procedure: turn the gain control fully counter-clockwise, turn the trim control fully
counter-clockwise. Set the record level control on the recorder to 12 o'clock or midway between
minimum and maximum. With the sound source present, adjust the preamplifier gain control
clockwise until the signal peaks at 9dBFS (+16dBu) on the V3. Adjust the record level control
on the recorder for the optimum recording level.
V3 meters:
dBFS ANALOG OUT ANALOG OUT LED COLOR
BALANCED (dBu) UNBALANCED (dBu)
0 +25 +19 RED
-3 +22 +16 AMBER
-6 +19 +13 AMBER
-9 +16 +10 AMBER
-12 +13 +7 GREEN
-15 +10 +4 GREEN
-21 +4 -2 GREEN
-27 -2 -8 GREEN
So the v3 manual suggests peaking the V3 at -9. That results in a balanced output level of +16dBu. The 722 can accept a +26dBu signal in line mode. So if you peak the V3 at only -9, you're probably going to need to add gain at the 722 in order to make your levels.
I have been running the V3 much hotter in these situations. Same for the DAV/BG1.
I just hung up the phone with Justin and he indicated that unity is at 0. At that setting, he says the 722 will neither add gain nor attenuate prior to sending to the A/D.
So it seems to me that the pre should be run hotter than -9 dBFS unless you want to add more gain with the 722. Thoughts?