a2b ETX-200, Installation Manual, Page: 16 / 32

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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 table below gives max bit rates for COFDM and QAM out from ETX-200.
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.