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