combined-fec40mhz-nocables.pdf ALTROC CHIP 40 MHz version VREF=1.19V sampling 10MHz nocables connected combined-fec40mhz-newcables.pdf 40 MHz FEC, 10 MHz sampling newcables in shielded box grounded with FEC and groundcable. combined-fec40mhz-oldcables.pdf 40 MHz FEC, 10 MHz sampling oldcables in shielded box grounded with FEC and groundcable.