DSX321G 18.432MHZ DSX321G 18.432MHz 12PF 20PPM DSX321G 19.200MHZ DSX321G 19.2M DSX321G 19.2MHZ DSX321G 19.500MHZ DSX321G 19.5MHZ DSX321G 19.6608MHZ DSX321G 20.000MHZ DSX321G 20.048MHz