I don't see any AGC settings under MARCS-IP Sys Options, nor under any individual MARCS site or Department. Quite elusive. Or is this something new with the latest firmware [which I haven't applied yet] ?
Keep looking. It's always been there, and I've changed it from the menu as recently as a couple of weeks ago, but I don't recall where it is and can't get my SDS100 out to look right now.
It doesn't help that the SDS100 manual is mostly useless. I'm pretty sure it is listed in the BCD436HP manual, so why they left it out of the SDS100 manual is a puzzler.