1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 3 .. _frontend-property-cable-systems: 4 5 ***************************************** 6 Properties used on cable delivery systems 7 ***************************************** 8 9 10 .. _dvbc-params: 11 12 DVB-C delivery system 13 ===================== 14 15 The DVB-C Annex-A is the widely used cable standard. Transmission uses 16 QAM modulation. 17 18 The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It 19 supports a subset of the Annex A modulation types, and a roll-off of 20 0.13, instead of 0.15 21 22 The 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 44 In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` 45 are also valid. 46 47 48 .. _dvbc-annex-b-params: 49 50 DVB-C Annex B delivery system 51 ============================= 52 53 The DVB-C Annex-B is only used on a few Countries like the United 54 States. 55 56 The 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 74 In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` 75 are also valid.
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