| Markus Heiser | 5377d91 | 2016-06-30 15:18:56 +0200 | [diff] [blame] | 1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | |
| 3 | .. _dvb_frontend: |
| 4 | |
| 5 | ################ |
| 6 | DVB Frontend API |
| 7 | ################ |
| 8 | The DVB frontend API was designed to support three types of delivery |
| 9 | systems: |
| 10 | |
| 11 | - Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, |
| 12 | DTMB, CMMB |
| 13 | |
| 14 | - Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B), ISDB-C |
| 15 | |
| 16 | - Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS |
| 17 | |
| 18 | The DVB frontend controls several sub-devices including: |
| 19 | |
| 20 | - Tuner |
| 21 | |
| 22 | - Digital TV demodulator |
| 23 | |
| 24 | - Low noise amplifier (LNA) |
| 25 | |
| 26 | - Satellite Equipment Control (SEC) hardware (only for Satellite). |
| 27 | |
| 28 | The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``. |
| 29 | Data types and ioctl definitions can be accessed by including |
| 30 | ``linux/dvb/frontend.h`` in your application. |
| 31 | |
| 32 | NOTE: Transmission via the internet (DVB-IP) is not yet handled by this |
| 33 | API but a future extension is possible. |
| 34 | |
| 35 | On Satellite systems, the API support for the Satellite Equipment |
| 36 | Control (SEC) allows to power control and to send/receive signals to |
| 37 | control the antenna subsystem, selecting the polarization and choosing |
| 38 | the Intermediate Frequency IF) of the Low Noise Block Converter Feed |
| 39 | Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC |
| 40 | (digital SEC) specification is available at |
| 41 | `Eutelsat <http://www.eutelsat.com/satellites/4_5_5.html>`__. |
| 42 | |
| 43 | |
| 44 | .. toctree:: |
| 45 | :maxdepth: 1 |
| 46 | |
| 47 | query-dvb-frontend-info |
| 48 | dvb-fe-read-status |
| 49 | dvbproperty |
| 50 | frontend_fcalls |
| 51 | frontend_legacy_dvbv3_api |