1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 .. c:namespace:: DTV.fe 3 4 .. _FE_ENABLE_HIGH_LNB_VOLTAGE: 5 6 ******************************** 7 ioctl FE_ENABLE_HIGH_LNB_VOLTAGE 8 ******************************** 9 10 Name 11 ==== 12 13 FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages. 14 15 Synopsis 16 ======== 17 18 .. c:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE 19 20 ``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)`` 21 22 Arguments 23 ========= 24 25 ``fd`` 26 File descriptor returned by :c:func:`open()`. 27 28 ``high`` 29 Valid flags: 30 31 - 0 - normal 13V and 18V. 32 33 - >0 - enables slightly higher voltages instead of 13/18V, in order 34 to compensate for long antenna cables. 35 36 Description 37 =========== 38 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 41 voltages. 42 43 Return Value 44 ============ 45 46 On success 0 is returned. 47 48 On error -1 is returned, and the ``errno`` variable is set 49 appropriately. 50 51 Generic error codes are described at the 52 :ref:`Generic Error Codes <gen-errors>` chapter.
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