DekTec DTC-378 T2Xpress - Manual (Page 22)

© 2009-2015 DekTec Digital Video BV Page 22/27 DTC-378 T2Xpress Manual
Essential Tools for Digital-TV Professionals February 2015
DTC-378 T2Xpress
7.10.1.3. V&V model
In case V&V model is selected, the PLP streams are generated according to the DVB-T2 V&V
Working Group "Generating DVB-T2 Reference Streams" document. Four modes of stream
generation are supported.
- Mode
Mode Description
Data PLP Stream Generates a sequence of Transport Stream packets for a data
PLP containing a PRBS payload.
Common PLP Stream Generates a sequence of Transport Stream packets for the
common PLP containing a PRBS, SDT and EIT-table payload.
Common PLP with Data Stream (PRBS) Transport Packets carrying the PRBS are split over the
common PLP and selected data PLP.
After combining the selected data PLP and common PLP in the
receiver it results in one single and complete PRBS stream.
This mode deviates a little from the V&V Working Group
generation model it enables BER measurement of the
combined streams.
Common PLP with Data Stream (TS-File) Transport Packets carrying the TS-file contents are split over
the common PLP and selected data PLP. If necessary stuffing
packets are generated on PID 0x1FFE.
After combining the selected data PLP and common PLP in the
receiver it results in one single and complete Transport
Stream again. This mode enables visual validation of the
combined streams.
- Run lengths
If the Mode is set to ‘Data PLP Stream’, this parameter specifies the number of packets that are
generated when it is this PLP’s turn. Each PLP in the group gets its turn. Within one chapter this
pattern is repeated a number of times. The length of the runs within the chapters is separated by
commas.
- #Repetitions
This parameter is common for all PLPs in the group. Therefore it is only specified in the common
PLP. This parameter specifies the number of repetitions within a chapter. The number of
repetitions is separated by commas.
- Common Slot itv
Interval between common PLP packets