8 12.5% 16 6.25% 32 3.2% 8B10B 25% Table 6 Over-head of HCM compared to 8B10B for different values of evel FEC Line Optical Clock /spectral HCM Data Rate/Mbps RS(n,k) code Rates/MHz efficiency [bit/s/Hz] (25, 248) use Table 1 for for HCM(1,1) 2 / 1 8B10B (1,1) payload and take into account /2N with ii) spectral efficiency for N=… M-PAM 2 / 1 (36,24) for i) overhead for HCM header 4 / 2 1B1B (-15,16) instead of 8B10B, see 8 / 3
8 12.5% 16 6.25% 32 3.2% 8B10B 25% Table 6 Over-head of HCM compared to 8B10B for different values of evel /spectral efficiency [bit/s/Hz] FEC RS(n,k) Line code HCM Optical Clock Rates/MHz Data Rate/Mbps 2 / 1 (25, 248) for payload 8B10B (1,1) /2N with N=… use Table 1 for HCM(1,1) and take into account ii) spectral efficiency for M-PAM i) overhead for HCM instead of 8B10B, see (36,24) for header 2 / 1 1B1B (-15,16) 4 / 2 8 / 3