... BBSYN is used to set the frequency for the BBC or digital filter assigned to each baseband channel (subband channel in EVLA terminology). ... All baseband channels assigned to the same physical BBC should be assigned the same frequency. ... For the VLBA DAR and MkIV systems, the baseband frequency must be set on even 10 kHz frequencies. ... The PFB personality of the RDBE, ( DBE = RDBE_PFB ) has rather rigid baseband frequency options. ... Argument: Up to 16 frequencies in MHz. ...