[PDBI\ or PICO\ or ALMA\]PLOT [...] [/SPURIOUS [NO]] Plot or not the position of spurious lines due to interferences. For Plateau de Bure, they are at IF1=4500 MHZ, 6300 MHz, and at 3 and 4 times the LO1REF frequency; plotting is the default, it can be deacti- vated with PLOT /SPURIOUS NO