Card Use the Card subtab to provision OPT-AMP-L, OPT-AMP-C, and OPT-AMP-17-C card-level parameters. Item Description Card Working Mode Allows you to provision the OPT-AMP-L, OPT-AMP-C, or OPT-AMP-17-C card as a PRE amplifier or as a BST amplifier. Apply Applies changes made to the fields in the tab. Reset Cancels any changes to the tab and returns the fields to their last-saved settings. Help Displays context-sensitive help.