.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. _frontend-property-cable-systems: ***************************************** Properties used on cable delivery systems ***************************************** .. _dvbc-params: DVB-C delivery system ===================== The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation. The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15 The following parameters are valid for DVB-C Annex A/C: - :ref:`DTV_API_VERSION <DTV-API-VERSION>` - :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - :ref:`DTV_TUNE <DTV-TUNE>` - :ref:`DTV_CLEAR <DTV-CLEAR>` - :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - :ref:`DTV_MODULATION <DTV-MODULATION>` - :ref:`DTV_INVERSION <DTV-INVERSION>` - :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` - :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` - :ref:`DTV_LNA <DTV-LNA>` In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` are also valid. .. _dvbc-annex-b-params: DVB-C Annex B delivery system ============================= The DVB-C Annex-B is only used on a few Countries like the United States. The following parameters are valid for DVB-C Annex B: - :ref:`DTV_API_VERSION <DTV-API-VERSION>` - :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - :ref:`DTV_TUNE <DTV-TUNE>` - :ref:`DTV_CLEAR <DTV-CLEAR>` - :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - :ref:`DTV_MODULATION <DTV-MODULATION>` - :ref:`DTV_INVERSION <DTV-INVERSION>` - :ref:`DTV_LNA <DTV-LNA>` In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` are also valid.
