I have written a tcl file and to the link library added only a fast.db file. Now suppose I include a second db file but this time a slow.db to my tcl file. Now in order to simulate the gate-level netlist with sdf back-annotation delays how should I choose the fast or the slow delay I defined in my tcl file for my simulations? I think it has something to do with the "mtm_spec" of the sdf command. Don't know how. Also is there generally any relation between the "mtm_spec" option and the -min -max operating conditions we define by the set_operating_conditions command?