18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ci.. _frontend-property-cable-systems: 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci***************************************** 68c2ecf20Sopenharmony_ciProperties used on cable delivery systems 78c2ecf20Sopenharmony_ci***************************************** 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci.. _dvbc-params: 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ciDVB-C delivery system 138c2ecf20Sopenharmony_ci===================== 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ciThe DVB-C Annex-A is the widely used cable standard. Transmission uses 168c2ecf20Sopenharmony_ciQAM modulation. 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ciThe DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It 198c2ecf20Sopenharmony_cisupports a subset of the Annex A modulation types, and a roll-off of 208c2ecf20Sopenharmony_ci0.13, instead of 0.15 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ciThe following parameters are valid for DVB-C Annex A/C: 238c2ecf20Sopenharmony_ci 248c2ecf20Sopenharmony_ci- :ref:`DTV_API_VERSION <DTV-API-VERSION>` 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci- :ref:`DTV_TUNE <DTV-TUNE>` 298c2ecf20Sopenharmony_ci 308c2ecf20Sopenharmony_ci- :ref:`DTV_CLEAR <DTV-CLEAR>` 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_ci- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci- :ref:`DTV_MODULATION <DTV-MODULATION>` 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_ci- :ref:`DTV_INVERSION <DTV-INVERSION>` 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ci- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_ci- :ref:`DTV_LNA <DTV-LNA>` 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ciIn addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` 458c2ecf20Sopenharmony_ciare also valid. 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ci 488c2ecf20Sopenharmony_ci.. _dvbc-annex-b-params: 498c2ecf20Sopenharmony_ci 508c2ecf20Sopenharmony_ciDVB-C Annex B delivery system 518c2ecf20Sopenharmony_ci============================= 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ciThe DVB-C Annex-B is only used on a few Countries like the United 548c2ecf20Sopenharmony_ciStates. 558c2ecf20Sopenharmony_ci 568c2ecf20Sopenharmony_ciThe following parameters are valid for DVB-C Annex B: 578c2ecf20Sopenharmony_ci 588c2ecf20Sopenharmony_ci- :ref:`DTV_API_VERSION <DTV-API-VERSION>` 598c2ecf20Sopenharmony_ci 608c2ecf20Sopenharmony_ci- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` 618c2ecf20Sopenharmony_ci 628c2ecf20Sopenharmony_ci- :ref:`DTV_TUNE <DTV-TUNE>` 638c2ecf20Sopenharmony_ci 648c2ecf20Sopenharmony_ci- :ref:`DTV_CLEAR <DTV-CLEAR>` 658c2ecf20Sopenharmony_ci 668c2ecf20Sopenharmony_ci- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` 678c2ecf20Sopenharmony_ci 688c2ecf20Sopenharmony_ci- :ref:`DTV_MODULATION <DTV-MODULATION>` 698c2ecf20Sopenharmony_ci 708c2ecf20Sopenharmony_ci- :ref:`DTV_INVERSION <DTV-INVERSION>` 718c2ecf20Sopenharmony_ci 728c2ecf20Sopenharmony_ci- :ref:`DTV_LNA <DTV-LNA>` 738c2ecf20Sopenharmony_ci 748c2ecf20Sopenharmony_ciIn addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` 758c2ecf20Sopenharmony_ciare also valid. 76