| .. -*- coding: utf-8; mode: rst -*- | |
| .. _dvb_frontend: | |
| ####################### | |
| Digital TV Frontend API | |
| ####################### | |
| The Digital TV frontend API was designed to support three groups of delivery | |
| systems: Terrestrial, cable and Satellite. Currently, the following | |
| delivery systems are supported: | |
| - Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, | |
| DTMB, CMMB | |
| - Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B) | |
| - Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS | |
| The Digital TV frontend controls several sub-devices including: | |
| - Tuner | |
| - Digital TV demodulator | |
| - Low noise amplifier (LNA) | |
| - Satellite Equipment Control (SEC) [#f1]_. | |
| The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``. | |
| Data types and ioctl definitions can be accessed by including | |
| ``linux/dvb/frontend.h`` in your application. | |
| .. note:: | |
| Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport) | |
| is not yet handled by this API but a future extension is possible. | |
| .. [#f1] | |
| On Satellite systems, the API support for the Satellite Equipment | |
| Control (SEC) allows to power control and to send/receive signals to | |
| control the antenna subsystem, selecting the polarization and choosing | |
| the Intermediate Frequency IF) of the Low Noise Block Converter Feed | |
| Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC | |
| (digital SEC) specification is available at | |
| `Eutelsat <http://www.eutelsat.com/satellites/4_5_5.html>`__. | |
| .. toctree:: | |
| :maxdepth: 1 | |
| query-dvb-frontend-info | |
| dvb-fe-read-status | |
| dvbproperty | |
| frontend_fcalls |