ioctl FE_ENABLE_HIGH_LNB_VOLTAGE &manvol; FE_ENABLE_HIGH_LNB_VOLTAGE Select output DC level between normal LNBf voltages or higher LNBf voltages. int ioctl int fd int request unsigned int high fd &fe_fd; request FE_ENABLE_HIGH_LNB_VOLTAGE 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. 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-dvb;