NX2520SA-32.000MHZ NX2520SA-32.000MHZ-STD-CSX1 NX2520SA-32.000M-STD-CSW-2 NX2520SA-32.000M-STD-CSW-4 NX2520SA-32.000M-STD-CSW-5 NX2520SA-32.000M-STD-CSX1 NX2520SA-32.000M-STD-CSX1 ND NX2520SA-32.0MHZ NX2520SA-32.768M-STD-CSW-4 NX2520SA-32MHZ-STD-CSX-1