Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst
Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst
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Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst- Extension
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Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
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Annotated Snippet
.. 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>`Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
Implementation Notes
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