1.. Permission is granted to copy, distribute and/or modify this 2.. document under the terms of the GNU Free Documentation License, 3.. Version 1.1 or any later version published by the Free Software 4.. Foundation, with no Invariant Sections, no Front-Cover Texts 5.. and no Back-Cover Texts. A copy of the license is included at 6.. Documentation/userspace-api/media/fdl-appendix.rst. 7.. 8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections 9 10.. _FE_ENABLE_HIGH_LNB_VOLTAGE: 11 12******************************** 13ioctl FE_ENABLE_HIGH_LNB_VOLTAGE 14******************************** 15 16Name 17==== 18 19FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages. 20 21 22Synopsis 23======== 24 25.. c:function:: int ioctl( int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high ) 26 :name: FE_ENABLE_HIGH_LNB_VOLTAGE 27 28 29Arguments 30========= 31 32``fd`` 33 File descriptor returned by :ref:`open() <frontend_f_open>`. 34 35``high`` 36 Valid flags: 37 38 - 0 - normal 13V and 18V. 39 40 - >0 - enables slightly higher voltages instead of 13/18V, in order 41 to compensate for long antenna cables. 42 43 44Description 45=========== 46 47Select output DC level between normal LNBf voltages or higher LNBf 48voltages between 0 (normal) or a value grater than 0 for higher 49voltages. 50 51 52Return Value 53============ 54 55On success 0 is returned. 56 57On error -1 is returned, and the ``errno`` variable is set 58appropriately. 59 60Generic error codes are described at the 61:ref:`Generic Error Codes <gen-errors>` chapter. 62