0001 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
0002 .. c:namespace:: DTV.fe
0003
0004 .. _FE_ENABLE_HIGH_LNB_VOLTAGE:
0005
0006 ********************************
0007 ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
0008 ********************************
0009
0010 Name
0011 ====
0012
0013 FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
0014
0015 Synopsis
0016 ========
0017
0018 .. c:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE
0019
0020 ``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)``
0021
0022 Arguments
0023 =========
0024
0025 ``fd``
0026 File descriptor returned by :c:func:`open()`.
0027
0028 ``high``
0029 Valid flags:
0030
0031 - 0 - normal 13V and 18V.
0032
0033 - >0 - enables slightly higher voltages instead of 13/18V, in order
0034 to compensate for long antenna cables.
0035
0036 Description
0037 ===========
0038
0039 Select output DC level between normal LNBf voltages or higher LNBf
0040 voltages between 0 (normal) or a value grater than 0 for higher
0041 voltages.
0042
0043 Return Value
0044 ============
0045
0046 On success 0 is returned.
0047
0048 On error -1 is returned, and the ``errno`` variable is set
0049 appropriately.
0050
0051 Generic error codes are described at the
0052 :ref:`Generic Error Codes <gen-errors>` chapter.
