Руководство По Установке для Cisco Cisco D9804 Multiple Transport Receiver
Appendix B
Technical Specifications
166
78-4042990-01 Rev B
Parameter
Specification
DVB-S2 Modulation (EN 302 307)
Modulation
QPSK, 8PSK
QPSK LDPC FEC Rates
Pilots On
8PSK LDPC FEC Rates
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
LDPC FEC Frame Length
3/5, 2/3, 3/4, 5/6, 8/9, 9/10
Pilot Tones
Normal
Symbol Rate Range
Automatic detection
Maximum Channel Bit Rate
See DVB-S2 Pilots Off/On FEC Rates (on page
166)
166)
Maximum User Bit Rate
90 Mbit/s
Note: For DVB-S2 symbol rates below 10 Ms/s, contact your Cisco sales
representative to evaluate your specific application.
representative to evaluate your specific application.
DVB-S2 Pilots Off/On FEC Rates
Parameters
Pilots Off
Pilots On
Symbol Rate
5 - 31 Msymbols/s
1 - 31 Msymbols/s
8PSK FEC Rates
5/6, 8/9, 9/10
3/5, 2/3, 3/4, 5/6, 8/9,
9/10
Symbol Rate
5 - 31 Msymbols/s
1 - 31 Msymbols/s
QPSK FEC Rates
1/2, 3/5, 2/3, 3/4, 5/6,
8/9, 9/10
8/9, 9/10
1/2, 3/5, 2/3, 3/4, 5/6,
8/9, 9/10
8/9, 9/10
DVB-S Eb/No (C/N) Ratio
Convolutional FEC Rate
Eb/No Ratio (dB) in Linear
Channel and IF Loop
Configuration
Channel and IF Loop
Configuration
C/N at DVB Threshold (BW
= Symbol Rate)
= Symbol Rate)
1/2
4.5
4.1
2/3
5.0
5.9
3/4
5.5
6.9
5/6
6.0
7.9
7/8
6.4
8.5