DSO321SW38.400MHZ DSO321SW40.000MHZ DSO321SW50.000MHZ DSO321SW8.000MHZ DSO321SWAH14.7456MHZ DSO321SY 12.288MHz DSO321SY 13.500MHz DSO321SY 16.000MHz DSO321SY 20.048MHz DSO321SY 3.6864MHz