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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | .. 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 <gen-errors>` chapter. |