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
