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WEB Interface
CP560 DVB-T2 Gateway User’s Manual Rev. 2.2 (3686)
ID: um_t2gateway
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Transport Stream (TS)
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Generic Encapsulated Stream (GSE)
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Generic Continuous Stream (GCS)
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Generic Fixed-length Packetized Stream (GFPS)
PLP mode
This field sets the transmission mode. Two modes are available:
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Normal Mode (NM), where the Input Stream Synchronisation (ISSY) Field is ap-
pended to user packets for packetized streams.
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High Efficiency Mode (HEM), where a single ISSY field is transmitted per BBFRAME
in the BBHEADER. Higher throughput than Normal Mode.
Group ID
This field identifies with which PLP group within the DVB-T2 system the current PLP is
associated.
Modulation
This field indicates the used constellation for the PLP signaling. Possible values are:
•
Quadrature Phase Shift Keying (QPSK)
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16 Quadrature Amplitude Modulation (16-QAM)
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64 Quadrature Amplitude Modulation (64-QAM)
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256 Quadrature Amplitude Modulation (256-QAM)
Rotated constellation
This feature improve the avoidence of potential problems in selective channels. This feature
is only applyable for QAM constellations.
FEC Type
Forward Error Correction (FEC) is a mechanism to add extra data to a transmission in
order to protect it. Dependent on the amount of extra data added, the receiver will be
able to correct errors (i.e. regenerate lost packets) in case of network packet loss. The two
supported types are:
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16 K Low density parity check (LDPC)
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64 K Low density parity check (LDPC)
Code rate
This field sets the value of the code rate, it sets the fraction of useful data in the FEC block.
Possible values are 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 for T2-Base and 1/3, 2/5, 1/2, 3/5, 2/3,
3/4 for T2-Lite. Values closer to 1 gives less protection but more data bits throughput.
Time interleaving type
This field indicates the type of time-interleaving.
Summary of Contents for CP560
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