Options, Licensing and Upgrades
7.2.1 Inputs and Outputs
The MPM1 has no external inputs or outputs. All data is passed into and out of the
module via the internal connectors.
7.2.2 Loss of Video Input
On loss of video input, the MPM1 can be configured to select one of the default test
patterns or a freeze frame as the output.
7.2.3 Output Bit Rate
The output rate of the transport packets is derived from the 27 MHz reference clock
and is accurate to within 1 kbps of the configured transport bit rate.
The output video bit rate of the MPM1 is configurable within ranges dictated by the
operating mode. These ranges are listed in Annex B, Technical Specification. The
Configured Video rate is also known as Transport Stream rate.
The module supports bit-stuffing to maintain configured bit rate, if the operating
mode requires it.
The output of a module never exceeds the configured bit rate (or bit rate ceiling).
7.2.4 Program Clock Reference
The MPM1 will insert a Program Clock Reference (PCR) in each video stream
header.
7.2.5 Transport Packets
The MPM1 supports adaptation field stuffing of transport packets for the alignment
of PES packets to transport packet boundaries. Valid continuity counter values are
inserted into the transport packet headers.
7.3 Removal and Replacement of Modules
This section gives information relating to the handling of option modules as they are
inserted/removed from the unit.
2/1553-FGC 101 1400 Uen B
7-4
Comments to this Manuals