Advantech AMT-73 Installation And Operation Manual page 119

The calculated uncoded size is thus reduced to the nearest multiple of 8.
In 2D cases, U is 1. The code rate is then determined as the ratio of the two values:
z
For each of the supported code, the rates are:
Code
eH(32, 26) eH(32,26) eH(16,11)
eH(64, 57) eH(64, 57) P(4,3)
eH(64, 57) eH(64, 56)
eH(128, 120) eH(128, 119)
eH(128, 120) P(128, 126)
Figure 58: eTPC Code Rates and Eb/No Values
The code rate can then be used to calculate the transmitted symbol rate from the input bit rate (and
visa versa):
CodeRate
The ratio of the raw data (base-band) bit rate and the transmitted symbol rate is the product of the
code rate and the modulation order in bits/symbol: BPSK has order 1; QPSK and Offset QPSK have
order 2; 8PSK has order 3 and 16QAM order 4.
AMT-70/AMT-73/AMT-75 Installation and Operation
× ×
⎛
(( U U
=
⎜
X Y
U int
bits
⎝
8
CodeRate =
Rate TPC Code
0.44815891 TPC16K-2/5
0.58817829 TPC16K-3/5
0.76550388 TPC4K-3/4
0.86288760 TPC16K-8/9
0.91375969 TPC16K-19/20
0.75 TPC-4k
0.875 TPC-16k
×
Modulation
bits / symbol
−
⎞
U ) 32 )
× ⎟
z
8
⎠
U
E
Eb/No (10 Mbps data rate & 10
QPSK 8PSK
2.4 dB
2.9 dB 5.8
3.9 dB 7.0
4.2 dB 7.3
5.1 dB 8.6
3.9 dB 7.0
4.2 dB 7.3
BitRate
=
bits / s
BaudRate
symbols / s
-7
BER)
16QAM
7.9
8.3
9.6
7.9
8.3
119