.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.fe .. _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:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE ``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)`` Arguments ========= ``fd`` File descriptor returned by :c:func:`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 ` chapter.