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.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. _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 is returned, and the ``errno`` variable is set
appropriately.
Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
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