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56 lines
1.6 KiB
56 lines
1.6 KiB
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
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.. _dvb_frontend: |
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####################### |
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Digital TV Frontend API |
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####################### |
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The Digital TV frontend API was designed to support three groups of delivery |
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systems: Terrestrial, cable and Satellite. Currently, the following |
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delivery systems are supported: |
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- Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, |
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DTMB, CMMB |
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- Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B) |
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- Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS |
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The Digital TV frontend controls several sub-devices including: |
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- Tuner |
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- Digital TV demodulator |
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- Low noise amplifier (LNA) |
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- Satellite Equipment Control (SEC) [#f1]_. |
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The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``. |
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Data types and ioctl definitions can be accessed by including |
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``linux/dvb/frontend.h`` in your application. |
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.. note:: |
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Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport) |
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is not yet handled by this API but a future extension is possible. |
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.. [#f1] |
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On Satellite systems, the API support for the Satellite Equipment |
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Control (SEC) allows to power control and to send/receive signals to |
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control the antenna subsystem, selecting the polarization and choosing |
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the Intermediate Frequency IF) of the Low Noise Block Converter Feed |
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Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC |
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(digital SEC) specification is available at |
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`Eutelsat <http://www.eutelsat.com/satellites/4_5_5.html>`__. |
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.. toctree:: |
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:maxdepth: 1 |
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query-dvb-frontend-info |
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dvb-fe-read-status |
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dvbproperty |
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frontend_fcalls
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