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To be sure that you don’t exceed maximum bit rate for an output
MUX, please control that you don’t select to many services.
The website:
http://www.satcodx.com/eng/
lists bit rates for satellite
services.
The services are named TS and marked red and by clicking on one
service you can get both average and peak values. It is
recommended to select the peak value when planning a new MUX.
The table below gives max bit rates for COFDM and QAM out from
ECX-200.
NOTE!
Due to bit rate fluctuations from statistical multiplexing, we
recommend that you only use 85% of the maximum available bit
rate
Output signal Modulation
Baudrate/BW
Max bitrate (Mb/s)
85%
COFDM
64QAM
8 MHz
31,67
26,92
COFDM
64QAM
7 MHz
27,71
23,55
COFDM
64QAM
6 MHz
23,75
20,19
QAM
16QAM
6.875 Mbaud/s
25,34
21,54
QAM
32QAM
6,875 Mbaud/s
31,68
26,93
QAM
64QAM
6.875 Mbaud/s
38,01
32,31
QAM
128QAM
6.875 Mbaud/s
44,35
37,70
QAM
256QAM
6.875 Mbaud/s
50,69
43,08
5. About remultiplexing
Table 1. Max bit rates for COFDM and QAM.
The formula for calculating QAM output bitrate is: [ Baudrate x
”A”/(204/188) ]where ”A” is 4 for 16QAM, 5 for 32QAM, 6 for
64QAM, 7 for 128QAM and 8 for 256QAM mode.
