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