[deliverable/linux.git] / Documentation / media / uapi / dvb / fe-enable-high-lnb-voltage.rst

.. -*- coding: utf-8; mode: rst -*-

.. _FE_ENABLE_HIGH_LNB_VOLTAGE:

********************************
ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
********************************

Name
====

FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.


Synopsis
========

.. c:function:: int ioctl( int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high )
    :name: FE_ENABLE_HIGH_LNB_VOLTAGE


Arguments
=========

``fd``
    File descriptor returned by :ref:`open() <frontend_f_open>`.

``high``
    Valid flags:

    -  0 - normal 13V and 18V.

    -  >0 - enables slightly higher voltages instead of 13/18V, in order
       to compensate for long antenna cables.


Description
===========

Select output DC level between normal LNBf voltages or higher LNBf
voltages between 0 (normal) or a value grater than 0 for higher
voltages.


Return Value
============

On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
Commit	Line	Data
5377d91f MH	1	.. -- coding: utf-8; mode: rst --
	2
	3	.. _FE_ENABLE_HIGH_LNB_VOLTAGE:
	4
	5	********************************
	6	ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
	7	********************************
	8
15e7d615	9	Name
586027ce	10	====
5377d91f	11
586027ce	12	FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
5377d91f	13
15e7d615 MCC	14
15e7d615 MCC	15	Synopsis
5377d91f MH	16	========
5377d91f MH	17
cf8076c3 MCC	18	.. c:function:: int ioctl( int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high )
cf8076c3 MCC	19	:name: FE_ENABLE_HIGH_LNB_VOLTAGE
5377d91f	20
586027ce	21
15e7d615	22	Arguments
5377d91f MH	23	=========
	24
	25	``fd``
	26	File descriptor returned by :ref:`open() <frontend_f_open>`.
	27
5377d91f MH	28	``high``
	29	Valid flags:
	30
	31	- 0 - normal 13V and 18V.
	32
	33	- >0 - enables slightly higher voltages instead of 13/18V, in order
	34	to compensate for long antenna cables.
	35
	36
15e7d615	37	Description
5377d91f MH	38	===========
	39
	40	Select output DC level between normal LNBf voltages or higher LNBf
	41	voltages between 0 (normal) or a value grater than 0 for higher
	42	voltages.
	43
586027ce	44
15e7d615	45	Return Value
586027ce	46	============
5377d91f MH	47
	48	On success 0 is returned, on error -1 and the ``errno`` variable is set
	49	appropriately. The generic error codes are described at the
	50	:ref:`Generic Error Codes <gen-errors>` chapter.