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Data Interfaces M6100 Broadcast Satellite Modulator
• When the VBR profile is selected, it is not possible to slave the baud rate of the
modulator onto the received TS rate.
• The jitter specifications are not applicable and traffic is taken in at best effort rate.
This means when too much packets are received data is discarded.
11.6.7.2 CBR (Constant Bit Rate)
M6100> TS over IP >> Traffic Profile
This is the property of a transport stream where the packet rate is constant over time, in other words
there are always the same number of packets in two time intervals of the same duration. CBR
streams are often used for transmission of multiplexes or programs over communications channels
of fixed bandwidth.
Note that the CBR is on TS level and not on IP level. This means that on IP level jitter
can be added but it does not impact the TS rate that stays constant.
In CBR mode, the baud rate of the modulator is slaved onto the received TS bit rate
when the rate adapter is disabled.
It is important that the input rate is configured correctly
The following figure is an example of a constant bit rate:
The red line indicates the variable rate of the effective data, while the green line indicates the bit rate
of the transport stream.
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