1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 3.. _frontend-property-cable-systems: 4 5***************************************** 6Properties used on cable delivery systems 7***************************************** 8 9 10.. _dvbc-params: 11 12DVB-C delivery system 13===================== 14 15The DVB-C Annex-A is the widely used cable standard. Transmission uses 16QAM modulation. 17 18The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It 19supports a subset of the Annex A modulation types, and a roll-off of 200.13, instead of 0.15 21 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 system 51============================= 52 53The DVB-C Annex-B is only used on a few Countries like the United 54States. 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