Hi all I'd like to add a phase error to my PHIB's and FOM's (experimental phases) that increases linearly with higher resolution.. it's akin to taking good phases and making them bad. Any approaches on how this can be done? Thanks FR --------------------------------------------- Francis Reyes M.Sc. 215 UCB University of Colorado at Boulder gpg --keyserver pgp.mit.edu --recv-keys 67BA8D5D 8AE2 F2F4 90F7 9640 28BC 686F 78FD 6669 67BA 8D5D