1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2 .. c:namespace:: DTV.fe
4 .. _FE_ENABLE_HIGH_LNB_VOLTAGE:
6 ********************************
7 ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
8 ********************************
13 FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
18 .. c:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE
20 ``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)``
26 File descriptor returned by :c:func:`open()`.
31 - 0 - normal 13V and 18V.
33 - >0 - enables slightly higher voltages instead of 13/18V, in order
34 to compensate for long antenna cables.
39 Select output DC level between normal LNBf voltages or higher LNBf
40 voltages between 0 (normal) or a value grater than 0 for higher
46 On success 0 is returned.
48 On error -1 is returned, and the ``errno`` variable is set
51 Generic error codes are described at the
52 :ref:`Generic Error Codes <gen-errors>` chapter.