.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
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.. c:namespace:: DTV.fe
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.. _FE_ENABLE_HIGH_LNB_VOLTAGE:
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********************************
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ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
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********************************
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Name
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====
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FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
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Synopsis
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========
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.. c:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE
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``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)``
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Arguments
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=========
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``fd``
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File descriptor returned by :c:func:`open()`.
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``high``
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Valid flags:
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- 0 - normal 13V and 18V.
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- >0 - enables slightly higher voltages instead of 13/18V, in order
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to compensate for long antenna cables.
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Description
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===========
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Select output DC level between normal LNBf voltages or higher LNBf
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voltages between 0 (normal) or a value grater than 0 for higher
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voltages.
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Return Value
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============
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On success 0 is returned.
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On error -1 is returned, and the ``errno`` variable is set
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appropriately.
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Generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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