-
- - .. row 1
-
- - int fd
-
- - File descriptor returned by a previous call to open().
-
- - .. row 2
-
- - int request
-
- - Equals :ref:`FE_READ_SNR` for this command.
-
- - .. row 3
-
- - uint16_t \*snr
-
- - The signal-to-noise ratio is stored into \*snr.