Evaluate Backup Exec 2012 - without affecting B.E. 2010 production backups

We are current running Backup Exec 2010 in our production environment. We do Full Saves on Thur to go offsite, Full on Friday to stay onsite, and incremental saves the other days of the week. All of the 2010 saves are set to ‘Use the Archive Bit (Reset Archive Bit).  

 I am also testing Backup Exec 2012 in Trial and would like to be able to do saves during the week that will not affect my production incremental saves. I’m a bit confused on the my options in 2012 – If I use the ‘By modified time’ Backup method, will it leave the Archive bit alone so my production saves are not affected?

Thank You