1 .. -*- coding: utf-8; mode: rst -*-
5 #######################
6 Digital TV Frontend API
7 #######################
9 The Digital TV frontend API was designed to support three groups of delivery
10 systems: Terrestrial, cable and Satellite. Currently, the following
11 delivery systems are supported:
13 - Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H,
16 - Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B)
18 - Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS
20 The Digital TV frontend controls several sub-devices including:
24 - Digital TV demodulator
26 - Low noise amplifier (LNA)
28 - Satellite Equipment Control (SEC) [#f1]_.
30 The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``.
31 Data types and ioctl definitions can be accessed by including
32 ``linux/dvb/frontend.h`` in your application.
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.
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>`__.
53 query-dvb-frontend-info