xref: /linux/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst (revision f30c3ff3f0e8305d6c1a210df6d588a13333b8f7) 
1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/userspace-api/media/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _frontend-property-cable-systems:
11
12*****************************************
13Properties used on cable delivery systems
14*****************************************
15
16
17.. _dvbc-params:
18
19DVB-C delivery system
20=====================
21
22The DVB-C Annex-A is the widely used cable standard. Transmission uses
23QAM modulation.
24
25The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It
26supports a subset of the Annex A modulation types, and a roll-off of
270.13, instead of 0.15
28
29The following parameters are valid for DVB-C Annex A/C:
30
31-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
32
33-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
34
35-  :ref:`DTV_TUNE <DTV-TUNE>`
36
37-  :ref:`DTV_CLEAR <DTV-CLEAR>`
38
39-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
40
41-  :ref:`DTV_MODULATION <DTV-MODULATION>`
42
43-  :ref:`DTV_INVERSION <DTV-INVERSION>`
44
45-  :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
46
47-  :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
48
49-  :ref:`DTV_LNA <DTV-LNA>`
50
51In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
52are also valid.
53
54
55.. _dvbc-annex-b-params:
56
57DVB-C Annex B delivery system
58=============================
59
60The DVB-C Annex-B is only used on a few Countries like the United
61States.
62
63The following parameters are valid for DVB-C Annex B:
64
65-  :ref:`DTV_API_VERSION <DTV-API-VERSION>`
66
67-  :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
68
69-  :ref:`DTV_TUNE <DTV-TUNE>`
70
71-  :ref:`DTV_CLEAR <DTV-CLEAR>`
72
73-  :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
74
75-  :ref:`DTV_MODULATION <DTV-MODULATION>`
76
77-  :ref:`DTV_INVERSION <DTV-INVERSION>`
78
79-  :ref:`DTV_LNA <DTV-LNA>`
80
81In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
82are also valid.
83