OBSERVATORY PDBI [Year] Several states of the PDBI hardware implementation can be accessed using the year in which they were installed: -1995: 3 and 1.3 mm receivers, 500 MHz bandwidth -2000: 3 and 1.3 mm receivers, 580 MHz bandwidth -2006: new generation receivers (NGR: 4 GHz bandwidth, 2 polar.) -2010 NGR + modifications in the LO system -2013 = 2010 + additional slight modification in the LO system -2015 = 2013 + Optimized tuning on a LO grid [default]