HIGH DATA RATE RECEIVER
HDR-4G+ USER’S MANUAL
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
© Safran Data Systems – IMP000074 e14r1
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It cannot be duplicated or distributed without expressed written consent.
De-scrambler 1.6.1.7
The Cortex HDR supports several types of auto-synchronized de-scrambler (before frame
synchronization):
- Specific satellite de-scrambler (consult SDSY for details)
- CCITT V.35 de-scrambler (standard and Intelsat modes selectable)
Note 1: License dependent (delivered licenses are listed in Annex 5)
Note 2: Software version dependent
Note 3: Bit rates are given at the input of the demodulator. Bit rates can be limited by the used
decoder, refer to the Maximum bit rates tables given in the chapter “Licenses and Start-up
Menus” or consult SDSY
Transport Layer (RS-DVB or asynchronous LDPC layer) 1.6.1.8
The Cortex HDR supports the “Transport layer” processing.
The Transport layer is implemented between the demodulator output and the input of the CADU frame
synchronizer (CCSDS Transfer Frame layer).
The Transport layer can be used (enable or disable by configuration) with:
the RS-DVB decoding process
the LDPC decoding (7/8,1/2, 2/3) process
The Transport layer acts as a first specific frame synchronizer. The parameters of this synchronizer can
be set in Windows Registries (refer to the paragraph “Cortex HDR System Parameters in Registry”).
The following figure gives an example of the transport layer used with LDPC.
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