Specifications

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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.
If you run a third party SNMP program you can monitor the Output bitrate and
see that the outgoing bitrate is not too high.
See Chapter 9 for more information about SNMP.
The table below gives max bit rates for QAM out from an EXM unit.
NOTE! Due to bit rate fluctuations from statistical multiplexing, we recommend
that you use maximum 85% of the theoretical available bit rate
English
Output signal Modulation Baudrate/BW Theoretical 85 %
bitrate (Mb/s)
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
Table 1. Theoretical bit rates for 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.
6 About remultiplexing QAM out