Cisco Cisco D9804 Multiple Transport Receiver 安装指南
L-Band Input and Processing
78-4042990-01 Rev B
167
C/N = Eb/No + 10 log (2 x FEC X 188/204)
The D9804 MTR currently displays the C/N Ratio.
DVB-S2 Error Rate Performance Es/No (C/N) Ratio
Mode
Simulated Es/No (dB) for
FEC Frame length = 64,800
FEC Frame length = 64,800
Typical Performance (dB) in
Linear Channel and IF Loop
Configuration
Linear Channel and IF Loop
Configuration
QPSK 1/2
1.00
1.2
QPSK 3/5
2.23
2.4
QPSK 2/3
3.10
3.2
QPSK 3/4
4.03
4.2
QPSK 4/5
4.68
4.8
QPSK 5/6
5.18
5.3
QPSK 8/9
6.20
6.4
QPSK 9/10
6.42
6.6
8PSK 3/5
5.50
5.8
8PSK 2/3
6.62
6.8
8PSK 3/4
7.91
8.1
8PSK 5/6
9.35
9.6
8PSK 8/9
10.69
10.9
8PSK 9/10
10.98
11.3