­Upstream Data Rates and SNR levels required

With overhead. In mbps

Channel-width	Standar Symbol Rate	QPSK*	8-QAM	16-QAM*	32-QAM	64-QAM	128-QAM
0,2Mhz	160	0,32	0,48	0,64	0,8	0,96	1,12
0,4Mhz	320	0,64	0,96	1,28	1,6	1,92	2,24
0.8Mhz	640	1,28	1,92	2,56	3,2	3,84	4,48
1,6Mhz	1280	2,56	3,84	5,12	6,4	7,68	8,96
3,2Mhz	2560	5,12	7,68	10,24	12,8	15,36	17,92
6,4Mhz	5120	10,24	15,36	20,48	25,6	30,72	35,84
		17db	20db	24db	26db	30db	34db	MIN SNR for BER 1.0E-12 ó 0,000000000001 = CER 0,00000001%
		15db	18db	22db	24db	28db	31db	MIN SNR for D3.0 Specs with BER 1.0E-08 ó 0,00000001 = CER 0,0001%
Bits per symbol		2	3	4	5	6	7

*Only DOCSIS 1.0 & 1.1

"Usable" Upstream Data Rates

Without overhead. In mbps

Channel-width	Standar Symbol Rate	QPSK*	8-QAM	16-QAM*	32-QAM	64-QAM	128-QAM
0,2Mhz	160	0,272	0,408	0,544	0,68	0,816	0,952
0,4Mhz	320	0,544	0,816	1,088	1,36	1,632	1,904
0.8Mhz	640	1,088	1,632	2,176	2,72	3,264	3,808
1,6Mhz	1280	2,176	3,264	4,352	5,44	6,528	7,616
3,2Mhz	2560	4,352	6,528	8,704	10,88	13,056	15,232
6,4Mhz	5120	8,704	13,056	17,408	21,76	26,112	30,464

*Only DOCSIS 1.0 & 1.1