Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. _frontend-property-cable-systems:
Properties used on cable delivery systems
.. _dvbc-params:
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:
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.