Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst

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.. document under the terms of the GNU Free Documentation License,
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/userspace-api/media/fdl-appendix.rst.
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections

.. _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.