1.. Permission is granted to copy, distribute and/or modify this 2.. document under the terms of the GNU Free Documentation License, 3.. Version 1.1 or any later version published by the Free Software 4.. Foundation, with no Invariant Sections, no Front-Cover Texts 5.. and no Back-Cover Texts. A copy of the license is included at 6.. Documentation/userspace-api/media/fdl-appendix.rst. 7.. 8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections 9 10.. _dvb_frontend: 11 12####################### 13Digital TV Frontend API 14####################### 15 16The Digital TV frontend API was designed to support three groups of delivery 17systems: Terrestrial, cable and Satellite. Currently, the following 18delivery systems are supported: 19 20- Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, 21 DTMB, CMMB 22 23- Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B) 24 25- Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS 26 27The Digital TV frontend controls several sub-devices including: 28 29- Tuner 30 31- Digital TV demodulator 32 33- Low noise amplifier (LNA) 34 35- Satellite Equipment Control (SEC) [#f1]_. 36 37The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``. 38Data types and ioctl definitions can be accessed by including 39``linux/dvb/frontend.h`` in your application. 40 41.. note:: 42 43 Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport) 44 is not yet handled by this API but a future extension is possible. 45 46.. [#f1] 47 48 On Satellite systems, the API support for the Satellite Equipment 49 Control (SEC) allows to power control and to send/receive signals to 50 control the antenna subsystem, selecting the polarization and choosing 51 the Intermediate Frequency IF) of the Low Noise Block Converter Feed 52 Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC 53 (digital SEC) specification is available at 54 `Eutelsat <http://www.eutelsat.com/satellites/4_5_5.html>`__. 55 56 57.. toctree:: 58 :maxdepth: 1 59 60 query-dvb-frontend-info 61 dvb-fe-read-status 62 dvbproperty 63 frontend_fcalls 64