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1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later2 3.. _frontend-property-cable-systems:4 5*****************************************6Properties used on cable delivery systems7*****************************************8 9 10.. _dvbc-params:11 12DVB-C delivery system13=====================14 15The DVB-C Annex-A is the widely used cable standard. Transmission uses16QAM modulation.17 18The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It19supports a subset of the Annex A modulation types, and a roll-off of200.13, instead of 0.1521 22The following parameters are valid for DVB-C Annex A/C:23 24- :ref:`DTV_API_VERSION <DTV-API-VERSION>`25 26- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`27 28- :ref:`DTV_TUNE <DTV-TUNE>`29 30- :ref:`DTV_CLEAR <DTV-CLEAR>`31 32- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`33 34- :ref:`DTV_MODULATION <DTV-MODULATION>`35 36- :ref:`DTV_INVERSION <DTV-INVERSION>`37 38- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`39 40- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`41 42- :ref:`DTV_LNA <DTV-LNA>`43 44In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`45are also valid.46 47 48.. _dvbc-annex-b-params:49 50DVB-C Annex B delivery system51=============================52 53The DVB-C Annex-B is only used on a few Countries like the United54States.55 56The following parameters are valid for DVB-C Annex B:57 58- :ref:`DTV_API_VERSION <DTV-API-VERSION>`59 60- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`61 62- :ref:`DTV_TUNE <DTV-TUNE>`63 64- :ref:`DTV_CLEAR <DTV-CLEAR>`65 66- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`67 68- :ref:`DTV_MODULATION <DTV-MODULATION>`69 70- :ref:`DTV_INVERSION <DTV-INVERSION>`71 72- :ref:`DTV_LNA <DTV-LNA>`73 74In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`75are also valid.76