.. 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 ` - :ref:`DTV_DELIVERY_SYSTEM ` - :ref:`DTV_TUNE ` - :ref:`DTV_CLEAR ` - :ref:`DTV_FREQUENCY ` - :ref:`DTV_MODULATION ` - :ref:`DTV_INVERSION ` - :ref:`DTV_SYMBOL_RATE ` - :ref:`DTV_INNER_FEC ` - :ref:`DTV_LNA ` In addition, the :ref:`DTV QoS statistics ` 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 ` - :ref:`DTV_DELIVERY_SYSTEM ` - :ref:`DTV_TUNE ` - :ref:`DTV_CLEAR ` - :ref:`DTV_FREQUENCY ` - :ref:`DTV_MODULATION ` - :ref:`DTV_INVERSION ` - :ref:`DTV_LNA ` In addition, the :ref:`DTV QoS statistics ` are also valid.